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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2012	May 02, 2012
Document and Entity Information
Entity Registrant Name	AFFILIATED MANAGERS GROUP INC
Entity Central Index Key	0001004434
Document Type	10-Q
Document Period End Date	Mar. 31, 2012
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		51,360,976
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenue	$ 417.7	$ 426.3
Operating expenses:
Compensation and related expenses	181.1	179.5
Selling, general and administrative	85.0	87.5
Amortization of intangible assets	30.4	22.1
Depreciation and other amortization	3.4	3.8
Other operating expenses	9.0	8.5
Total operating expenses	308.9	301.4
Operating income	108.8	124.9
Non-operating (income) and expenses:
Investment and other income	(10.4)	(8.7)
Income from equity method investments	(14.5)	(10.2)
Interest expense	18.6	19.4
Imputed interest expense and contingent payment arrangements	(2.5)	8.3
Total non-operating (income) and expenses	(8.8)	8.8
Income before income taxes	117.6	116.1
Income taxes	24.6	26.7
Net income	93.0	89.4
Net income (non-controlling interests)	(55.6)	(50.3)
Net income (controlling interest)	$ 37.4	$ 39.1
Average shares outstanding - basic (in shares)	51.6	51.8
Average shares outstanding - diluted (in shares)	52.9	53.1
Earnings per share - basic (in dollars per share)	$ 0.72	$ 0.76
Earnings per share - diluted (in dollars per share)	$ 0.71	$ 0.74

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 93.0	$ 89.4
Other comprehensive income (loss):
Foreign currency translation adjustment	14.4	14.2
Change in net realized and unrealized gain (loss) on derivative securities, net of tax	(0.1)	0.7
Change in net unrealized gain (loss) on investment securities, net of tax	9.1	(3.5)
Other comprehensive income	23.4	11.4
Comprehensive income	116.4	100.8
Comprehensive income (non-controlling interests)	(57.3)	(50.3)
Comprehensive income (controlling interest)	$ 59.1	$ 50.5

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to noncontrolling interests, if any. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

Gross appreciation or the gross loss in value of the total unsold securities. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

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- Definition

This element represents Other Comprehensive Income or Loss, Net of Tax, for the period. Includes deferred gains or losses on qualifying hedges, unrealized holding gains or losses on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 393.7	$ 449.5
Investment advisory fees receivable	224.6	214.9
Investments in marketable securities	122.6	100.4
Unsettled fund share receivables	80.7	34.5
Prepaid expenses and other current assets	73.6	77.1
Total current assets	895.2	876.4
Fixed assets, net	70.2	69.1
Equity investments in Affiliates	599.2	615.8
Acquired client relationships, net	1,298.8	1,321.1
Goodwill	2,125.8	2,117.3
Other assets	220.7	219.2
Total assets	5,209.9	5,218.9
Current liabilities:
Accounts payable and accrued liabilities	246.2	343.6
Unsettled fund share payables	83.7	40.8
Payables to related party	17.1	33.2
Total current liabilities	347.0	417.6
Senior bank debt	250.0	250.0
Senior convertible securities	439.2	435.6
Junior convertible trust preferred securities	513.3	512.6
Deferred income taxes	525.8	506.0
Other long-term liabilities	151.4	145.7
Total liabilities	2,226.7	2,267.5
Redeemable non-controlling interests	509.6	451.8
Equity:
Common stock	0.5	0.5
Additional paid-in capital	876.2	927.5
Accumulated other comprehensive income	71.7	50.0
Retained earnings	1,214.1	1,176.7
Total stockholders' equity before treasury stock	2,162.5	2,154.7
Less treasury stock, at cost	(300.1)	(288.7)
Total stockholders' equity	1,862.4	1,866.0
Non-controlling interests	611.2	633.6
Total equity	2,473.6	2,499.6
Total liabilities and equity	$ 5,209.9	$ 5,218.9

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - 3 months ended Mar. 31, 2012 - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock at Cost	Non-controlling interests
Balance at Dec. 31, 2011	$ 2,499.6	$ 0.5	$ 927.5	$ 50.0	$ 1,176.7	$ (288.7)	$ 633.6
Increase (Decrease) in Stockholders' Equity
Stock issued under option and other incentive plans	14.9		(9.8)			24.7
Tax benefit of option exercises	3.9		3.9
Changes in Affiliate equity value	(47.4)		(53.5)				6.1
Share-based payment arrangements	8.1		8.1
Distributions to non-controlling interests	(85.8)						(85.8)
Repurchase of common shares	(36.1)					(36.1)
Net income	93.0				37.4		55.6
Other comprehensive income	23.4			21.7			1.7
Balance at Mar. 31, 2012	$ 2,473.6	$ 0.5	$ 876.2	$ 71.7	$ 1,214.1	$ (300.1)	$ 611.2

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flow from operating activities:
Net income	$ 93.0	$ 89.4
Adjustments to reconcile Net income to net cash flow from operating activities:
Amortization of intangible assets	30.4	22.1
Amortization of issuance costs	1.8	2.6
Depreciation and other amortization	3.4	3.8
Deferred income tax provision	13.4	9.6
Imputed interest expense and contingent payment arrangements	(2.5)	8.3
Income from equity method investments, net of amortization	(14.5)	(10.2)
Distributions received from equity method investments	36.8	64.9
Tax benefit from exercise of stock options	0.4	0.8
Share-based compensation	8.2	6.1
Affiliate equity expense	2.2	3.5
Other adjustments	(6.0)	(2.4)
Changes in assets and liabilities:
(Increase) decrease in investment advisory fees receivable	(12.5)	3.0
Increase in prepaids and other current assets	(9.1)	(2.5)
Increase in other assets	(0.5)	(1.6)
Increase in unsettled fund shares receivable	(45.2)	(60.7)
Increase in unsettled fund shares payable	41.6	54.5
Decrease in accounts payable, accrued liabilities and other long-term liabilities	(88.4)	(62.9)
Cash flow from operating activities	52.5	128.3
Cash flow from (used in) investing activities:
Investments in Affiliates		(13.3)
Purchase of fixed assets	(1.3)	(1.7)
Purchase of investment securities	(9.5)	(6.6)
Sale of investment securities	12.9	10.3
Cash flow from (used in) investing activities	2.1	(11.3)
Cash flow used in financing activities:
Repayments of senior bank debt		(120.0)
Issuance of common stock	15.1	15.2
Repurchase of common stock	(32.7)
Issuance costs		(7.7)
Excess tax benefit from exercise of stock options	3.5	4.9
Settlement of treasury lock		4.0
Note payments	(0.2)	0.3
Distributions to non-controlling interests	(82.0)	(68.6)
Affiliate equity issuances and repurchases	(16.9)	(7.8)
Cash flow used in financing activities	(113.2)	(179.7)
Effect of foreign exchange rate changes on cash and cash equivalents	2.8	2.2
Net decrease in cash and cash equivalents	(55.8)	(60.5)
Cash and cash equivalents at beginning of period	449.5	313.3
Cash and cash equivalents at end of period	393.7	252.8
Supplemental disclosure of non-cash financing activities:
Notes received for Affiliate equity sales	1.0	9.5
Payables recorded for Affiliate equity purchases	$ 11.2	$ 7.0

Basis of Presentation

3 Months Ended

Mar. 31, 2012

Basis of Presentation

Basis of Presentation

1. Basis of Presentation

The consolidated financial statements of Affiliated Managers Group, Inc. ("AMG" or the "Company") have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. The year-end condensed balance sheet data was derived from audited financial statements, but does not include all of the disclosures required by accounting principles generally accepted in the United States of America. In the opinion of management, all adjustments considered necessary for a fair statement of the results have been included. All intercompany balances and transactions have been eliminated. Certain reclassifications have been made to the prior period's financial statements to conform to the current period's presentation. Operating results for interim periods are not necessarily indicative of the results that may be expected for any other period or for the full year. The Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2011 includes additional information about AMG, its operations, financial position and accounting policies, and should be read in conjunction with this Quarterly Report on Form 10-Q.

All dollar amounts in these notes, except per share data in the text and tables herein, are stated in millions unless otherwise indicated.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

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-Name Accounting Standards Codification
-Topic 915
-SubTopic 235
-Section 50
-Paragraph 1
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-Paragraph 3
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-Publisher FASB
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph 8, C1, C7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Senior Bank Debt

3 Months Ended

Mar. 31, 2012

Senior Bank Debt

Senior Bank Debt

2. Senior Bank Debt

The Company entered into a $1.0 billion senior unsecured credit facility in November 2011 (the "credit facility"), consisting of a $750.0 million revolving credit facility (the "revolver") and a $250.0 million term loan (the "term loan"), the principal terms of which are similar to the Company's previous senior unsecured credit facility. The term loan and $720.0 million of the revolver have a five-year maturity (maturing November 2016); the remaining $30.0 million of the revolver matures in January 2015. Subject to certain conditions, the Company may increase the revolver and the term loan by up to $150.0 million and $250.0 million, respectively.

The credit facility is unsecured and contains financial covenants with respect to leverage and interest coverage, as well as customary affirmative and negative covenants, including limitations on indebtedness, liens, cash dividends, asset dispositions and fundamental corporate changes. As of March 31, 2012, the Company was in compliance with all terms of its credit facility.

As further described in Note 13, the Company has entered into interest rate swap contracts to exchange a fixed rate for the variable rate on a portion of its credit facility.

Convertible Securities

3 Months Ended

Mar. 31, 2012

Convertible Securities

Convertible Securities

3. Convertible Securities

At March 31, 2012, the Company has one senior convertible security outstanding ("2008 senior convertible notes") and two junior convertible trust preferred securities outstanding, one issued in 2006 (the "2006 junior convertible trust preferred securities") and a second issued in 2007 (the "2007 junior convertible trust preferred securities"). The carrying values of the Company's convertible securities are as follows:

	December 31, 2011				March 31, 2012

	Carrying Value		Principal amount at maturity		Carrying Value		Principal amount at maturity
Senior convertible securities:
2008 senior convertible notes⁽¹⁾	$	435.6	$	460.0	$	439.2	$	460.0

Junior convertible trust preferred securities:
2007 junior convertible trust preferred securities⁽¹⁾	$	297.8	$	430.8	$	298.2	$	430.8
2006 junior convertible trust preferred securities⁽¹⁾		214.8		300.0		215.1		300.0

Total junior convertible securities	$	512.6	$	730.8	$	513.3	$	730.8

(1): Carrying value is accreted to the principal amount at maturity over an expected life of five years for the 2008 senior convertible notes and 30 years for each of the junior convertible trust preferred securities.

The principal terms of these securities are summarized below.

	2008 Senior Convertible Notes⁽¹⁾			2007 Junior Convertible Trust Preferred Securities⁽²⁾			2006 Junior Convertible Trust Preferred Securities⁽³⁾

Issue date		August 2008			October 2007			April 2006
Maturity date		August 2038			October 2037			April 2036
Next potential put date		August 2013			N/A			N/A
Denomination	$	1,000		$	50		$	50
Current conversion rate		7.959			0.250			0.333
Current conversion price	$	125.65		$	200.00		$	150.00
Stated coupon		3.95	%		5.15	%		5.10	%
Coupon frequency		Semi-annually			Quarterly			Quarterly
Tax deduction rate⁽⁴⁾		9.38	%		8.00	%		7.50	%

(1): The Company may redeem the notes for cash (subject to the holders' rights to convert) at any time on or after August 15, 2013. The holders may require the Company to repurchase the notes in August of 2013, 2018, 2023, 2028 and 2033.
(2): The Company may redeem the 2007 junior convertible trust preferred securities on or after October 15, 2012 if the closing price of the Company's common stock exceeds $260 per share for a specified period of time.
(3): The Company may redeem the 2006 junior convertible trust preferred securities if the closing price of the Company's common stock exceeds $195 per share for a specified period of time.

(4): These convertible securities are considered contingent payment debt instruments under federal income tax regulations, which require the Company to deduct interest in an amount greater than its reported Interest expense. These deductions will result in deferred tax liabilities of approximately $24.5 million in 2012. These deferred tax liabilities will be reclassified directly to stockholders' equity if the Company's common stock is trading above certain thresholds at the time of the conversion of the securities.

Forward Equity Sale Agreements

3 Months Ended

Mar. 31, 2012

Forward Equity Sale Agreements

Forward Equity Sale Agreements

4. Forward Equity Sale Agreements

In July 2011, the Company entered into a forward equity sale agreement with two major securities firms under which it may sell shares of common stock with an aggregate sales price of up to $300.0 million. This agreement replaced all then outstanding forward equity sale agreements. As of March 31, 2012, no forward equity sales have occurred.

Income Taxes

3 Months Ended

Mar. 31, 2012

Income Taxes

Income Taxes

5. Income Taxes

The consolidated income tax provision includes taxes attributable to the controlling interest and, to a lesser extent, taxes attributable to non-controlling interests as follows:

	For the Three Months Ended March 31,

	2011			2012
Controlling Interests:
Current tax	$	13.5		$	8.0
Intangible related deferred taxes		12.9			9.9
Other deferred taxes		(2.8	)		2.9

Total controlling interests		23.6			20.8

Non-Controlling Interests:
Current tax	$	3.6		$	3.2
Deferred taxes		(0.5	)		0.6

Total non-controlling interests		3.1			3.8

Provision for income taxes	$	26.7		$	24.6

Income before income taxes (controlling interest)	$	62.7		$	58.2

Effective tax rate attributable to controlling interests⁽¹⁾		37.6	%		35.7	%

(1): Taxes attributable to the controlling interest divided by Income before income taxes (controlling interest).

A summary of the consolidated provision for income taxes is as follows:

	For the Three Months Ended March 31,

	2011			2012
Current:
Federal	$	6.1		$	1.0
State		3.1			2.7
Foreign		7.9			7.5

Total current		17.1			11.2

Deferred:
Federal	$	11.3		$	13.4
State		0.7			1.1
Foreign		(2.4	)		(1.1	)

Total deferred		9.6			13.4

Provision for income taxes	$	26.7		$	24.6

The components of deferred tax assets and liabilities are as follows:

	December 31, 2011			March 31, 2012

Deferred Tax Assets
State net operating loss carryforwards	$	26.5		$	26.2
Foreign tax credit carryforwards		15.1			13.7
Deferred compensation		17.5			18.7
Tax benefit of uncertain tax positions		11.6			11.9
Accrued expenses		11.6			9.6
Capital loss carryforwards		1.5			1.5

Total deferred tax assets		83.8			81.6
Valuation allowance		(35.6	)		(34.6	)

Deferred tax assets, net of valuation allowance	$	48.2		$	47.0

Deferred Tax Liabilities
Intangible asset amortization	$	(247.1	)	$	(257.3	)
Convertible securities interest		(171.1	)		(175.5	)
Non-deductible intangible amortization		(127.2	)		(126.5	)
Deferred revenue		(5.6	)		(10.5	)
Other		(3.2	)		(3.0	)

Total deferred tax liabilities		(554.2	)		(572.8	)

Net deferred tax liability	$	(506.0	)	$	(525.8	)

Deferred tax liabilities are primarily the result of tax deductions for the Company's intangible assets and convertible securities. The Company amortizes most of its intangible assets for tax purposes only, reducing its tax basis below its carrying value for financial statement purposes and generating deferred taxes each reporting period. The Company's 2008 senior convertible notes and junior convertible trust preferred securities also generate deferred tax liabilities because the Company's tax deductions are higher than the interest expense recorded for financial statement purposes.

At March 31, 2012, the Company has state net operating loss carryforwards that expire over a 15-year period beginning in 2011. The Company also has foreign tax credit carryforwards that expire over a 10-year period beginning in 2011. The valuation allowances at December 31, 2011 and March 31, 2012 were principally related to the Company's ability to generate sufficient taxable income prior to the expiration of these carryforwards.

The Company carried a liability for uncertain tax positions of $21.8 million as of March 31, 2012. These amounts included $1.7 million of interest and related charges. The Company does not anticipate that this liability will change significantly over the next twelve months.

The Company periodically has tax examinations in the United States and foreign jurisdictions. Examination outcomes, and any related settlements, are subject to significant uncertainty. The completion of examinations may result in the payment of additional taxes and/or the recognition of tax benefits.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Earnings Per Share

3 Months Ended

Mar. 31, 2012

Earnings Per Share

Earnings Per Share

6. Earnings Per Share

The calculation of basic earnings per share is based on the weighted average number of shares of the Company's common stock outstanding during the period. Diluted earnings per share is similar to basic earnings per share, but adjusts for the dilutive effect of the potential issuance of incremental shares of the Company's common stock. The following is a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per share available to common stockholders.

	For the Three Months Ended March 31,

	2011		2012
Numerator:
Net income (controlling interest)	$	39.1	$	37.4

Denominator:
Average shares outstanding—basic		51.8		51.6
Effect of dilutive instruments:
Stock options and other awards		1.3		1.3

Average shares outstanding—diluted		53.1		52.9

As more fully discussed in Note 3, the Company had convertible securities outstanding during the periods presented and is required to apply the if-converted method to these securities in its calculation of diluted earnings per share. Under the if-converted method, shares that are issuable upon conversion are deemed outstanding, regardless of whether the securities are contractually convertible into the Company's common stock at that time. For this calculation, the interest expense (net of tax) attributable to these dilutive securities is added back to Net income (controlling interest), reflecting the assumption that the securities have been converted. Issuable shares for these securities and related interest expense are excluded from the calculation if an assumed conversion would be anti-dilutive to diluted earnings per share.

For the three months ended March 31, 2012, the Company repurchased approximately 0.3 million shares of common stock under the share repurchase programs approved by the Company's Board of Directors.

The diluted earnings per share calculations in the table above exclude the anti-dilutive effect of the following shares:

	For the Three Months Ended March 31,

	2011		2012
Stock options and other awards		0.6		1.2
Senior convertible securities		4.2		4.2
Junior convertible trust preferred securities		3.7		3.7

As discussed further in Note 16, the Company may settle portions of its Affiliate equity purchases in shares of its common stock. Because it is the Company's intent to settle these potential repurchases in cash, the calculation of diluted earnings per share excludes any potential dilutive effect from possible share settlements.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies

Commitments and Contingencies

7. Commitments and Contingencies

The Company and its Affiliates are subject to claims, legal proceedings and other contingencies in the ordinary course of their business activities. Each of these matters is subject to various uncertainties, and it is possible that some of these matters may be resolved in a manner unfavorable to the Company or its Affiliates. The Company and its Affiliates establish accruals for matters for which the outcome is probable and the amount of the liability can be reasonably estimated. Management believes that any liability in excess of these accruals upon the ultimate resolution of these matters will not have a material adverse effect on the Company.

Certain Affiliates operate under regulatory authorities which require that they maintain minimum financial or capital requirements. Management is not aware of any significant violations of such financial requirements occurring during the period.

In connection with its investment in Pantheon Ventures, the Company has committed to co-invest in certain investment partnerships where it serves as the general partner. As of March 31, 2012, these commitments totaled approximately $80.6 million and may be called in future periods. Russell Investments (Pantheon Ventures' former owner) is contractually obligated to reimburse the Company for $45.6 million of these commitments if they are called.

Under past acquisition agreements, the Company is contingently liable, upon achievement of specified financial targets, to make payments of up to $496.3 million through 2017. As of March 31, 2012, the Company expects to make payments of $99.9 million to settle these contingent obligations in 2012-2015 (these payments are calculated to have a net present value of $83.1 million), of which $72.0 million is expected to be settled in the fourth quarter of 2012 and the remainder to be settled between 2014 and 2015. In the first quarter of 2012, the Company reduced its current estimate of payments to be made under these agreements and recognized a gain of $9.9 million ($5.0 million attributable to the controlling interest). This gain has been classified within Imputed interest expense and contingent payment arrangements in the Consolidated Statements of Income.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Topic 825
-SubTopic 20
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-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Investments

3 Months Ended

Mar. 31, 2012

Investments

Investments

8. Investments

Investments in Marketable Securities

Investment in marketable securities at December 31, 2011 and March 31, 2012 were $100.4 million and $122.6 million, respectively. These investments are comprised of the Company's investments in Value Partners Group Limited ("Value Partners"), a publicly-traded asset management firm based in Hong Kong, and investments held by Affiliates.

Available-for-Sale Investments

The following is a summary of the cost, gross unrealized gains and losses and fair value of investments classified as available-for-sale at December 31, 2011 and March 31, 2012:

December 31, 2011

			Gross Unrealized

			Gross Unrealized					Fair Value
	Cost		Gains		Losses			Fair Value
Equity securities	$	97.6	$	1.4	$	(12.7	)	$	86.3

March 31, 2012

			Gross Unrealized

	Cost		Gains		Losses			Fair Value
Equity securities	$	92.1	$	12.0	$	(2.6	)	$	101.5

As of March 31, 2012, the Company has invested $83.3 million in Value Partners, representing 7.8% of the outstanding common stock.

The following is a summary of the Company's realized gains and losses on investments classified as available-for-sale:

	For the Three Months Ended March 31,

	2011		2012
Gains	$	0.2	$	—
Losses		—		—

Net realized gains	$	0.2	$	—

Trading Securities

The following is a summary of the cost, gross unrealized gains and losses and fair value of investments classified as trading securities at December 31, 2011 and March 31, 2012:

December 31, 2011

			Gross Unrealized

			Gross Unrealized					Fair Value
	Cost		Gains		Losses			Fair Value
Equity securities	$	13.5	$	0.9	$	(0.3	)	$	14.1

March 31, 2012

			Gross Unrealized

			Gross Unrealized				Fair Value
	Cost		Gains		Losses		Fair Value
Equity securities	$	9.6	$	11.5	$	—	$	21.1

The following is a summary of the Company's realized gains and losses on investments classified as trading securities:

	For the Three Months Ended March 31,

	2011			2012
Gains	$	0.2		$	0.5
Losses		(0.3	)		(0.3	)

Net realized gains (losses)	$	(0.1	)	$	0.2

Cost Method Investments

As of December 31, 2011 and March 31, 2012, the Company has $14.6 million in cost method investments. These investments are recorded in Other assets.

Other Investments

Other investments consist of investments in funds advised by Affiliates. As of December 31, 2011 and March 31, 2012, the Company's other investments were $145.3 million and $157.0 million, respectively. These assets are reported within Prepaid expenses and other current assets ($31.2 million and $37.4 million at December 31, 2011 and March 31, 2012, respectively) and Other assets ($114.1 million and $119.6 million at December 31, 2011 and March 31, 2012, respectively) in the Consolidated Balance Sheets. The income or loss related to these investments is classified within Investment and other income in the Consolidated Statements of Income.

Fair Value Measurements

3 Months Ended

Mar. 31, 2012

Fair Value Measurements

Fair Value Measurements

9. Fair Value Measurements

The Company determines the fair value of certain investment securities and other financial and nonfinancial assets and liabilities. Fair value is determined based on the price that would be received for an asset or paid to transfer a liability in the principal market for the asset or liability, or absent a principal market, the most advantageous market for the asset or liability, utilizing a hierarchy of three different valuation techniques:

Level 1—Unadjusted quoted market prices for identical instruments in active markets;

Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs, or significant value drivers, are observable; and

Level 3—Prices reflect the Company's own assumptions concerning unobservable inputs to the valuation model. These inputs require significant management judgment and reflect the Company's estimation of assumptions that market participants would use in pricing the asset or liability.

The following table summarizes the Company's assets and liabilities that are measured at fair value on a recurring basis:

			Fair Value Measurements

	December 31, 2011		Fair Value Measurements
	December 31, 2011		Level 1		Level 2		Level 3
Financial Assets
Cash equivalents	$	23.2	$	23.2	$	—	$	—
Investments in marketable securities⁽¹⁾
Trading securities		14.1		14.1		—		—
Available-for-sale securities		86.3		86.3		—		—
Other investments⁽²⁾		145.3		31.1		10.8		103.4
Financial Liabilities
Contingent payment arrangements⁽³⁾	$	87.1	$	—	$	—	$	87.1
Obligations to related parties⁽⁴⁾		92.0		—		—		92.0
Interest rate derivatives		2.9		—		2.9		—

			Fair Value Measurements

	March 31, 2012		Fair Value Measurements
	March 31, 2012		Level 1		Level 2		Level 3
Financial Assets
Cash equivalents	$	12.3	$	12.3	$	—	$	—
Investments in marketable securities⁽¹⁾
Trading securities		21.1		21.1		—		—
Available-for-sale securities		101.5		101.5		—		—
Other investments⁽²⁾		157.0		34.5		15.0		107.5
Financial Liabilities
Contingent payment arrangements⁽³⁾	$	83.1	$	—	$	—	$	83.1
Obligations to related parties⁽⁴⁾		77.6		—		—		77.6
Interest rate derivatives		3.0		—		3.0		—

(1): Principally investments in equity securities.
(2): Other investments are reported within Prepaid expenses and other current assets and Other assets.
(3): Net present value of expected payments under contingent payment arrangements are reported in Accounts payable and accrued liabilities and Other long-term liabilities.
(4): Obligations to related parties are presented within Payables to related party and Other long-term liabilities.

The following is a description of the significant assets and liabilities measured at fair value and the fair value methodologies used.

Cash equivalents consist primarily of highly liquid investments in money market funds. Cash investments in actively traded money market funds are classified as Level 1.

Investments in marketable securities consist primarily of investments in publicly traded securities and in funds advised by Affiliates which are valued using net asset value ("NAV"). These investments are classified as Level 1.

Other investments are valued using NAV. Investments in actively traded funds that calculate daily NAVs are classified as Level 1. Investments in funds that permit redemptions monthly or quarterly are classified as Level 2. Investments in funds that are subject to longer redemption restrictions are classified as Level 3. The fair value of Level 3 assets is determined using NAV one quarter in arrears (adjusted for current period calls and distributions).

Interest rate derivatives include interest rate swaps. The fair value of these assets is determined by model-derived valuations in which all significant inputs were observable in active markets.

Contingent payment arrangements represent the present value of the expected future settlement of contingent payment arrangements related to the Company's business combinations. The significant unobservable inputs used in the fair value measurement of these obligations are growth and discount rates. Increases in the growth rate would result in a higher obligation while an increase in the discount rate would result in a lower obligation.

Obligations to related parties include agreements to repurchase Affiliate equity and liabilities offsetting certain investments which are held by the Company but economically attributable to a related party. The significant unobservable inputs used in the fair value measurement of the agreements to repurchase Affiliate equity are growth and discount rates. Increases in the growth rate would result in a higher obligation while an increase in the discount rate would result in a lower obligation. The liability to a related party is measured based upon certain investments held by the Company, the fair value of which is determined using NAV.

The following table presents certain quantitative information about the significant unobservable inputs used in valuing our Level 3 liabilities:

	Quantitative Information about Level 3 Fair Value Measurements

	Fair Value at March 31, 2012		Valuation Techniques	Unobservable Input	Range
Contingent payment arrangements	$	83.1	Discounted cash flow	Growth rates	10.0% - 18.0%
				Discount rates	14.0% - 18.0%
Affiliate equity repurchase obligations		14.9	Discounted cash flow	Growth rates	8.0% - 17.5%
				Discount rates	16.0% - 24.0%

The following table presents the changes in Level 3 assets and liabilities for the three months ended March 31, 2011 and 2012:

	Level 3 Financial Assets and Financial Liabilities at Fair Value

Three Months Ended March 31, 2011	Balance, beginning of period		Net realized gains/losses			Net unrealized gains/losses relating to instruments still held at the reporting date			Purchases and issuances		Settlements and reductions			Net transfers in and/or out of Level 3		Balance, end of period
Other investments	$	85.7	$	1.1	⁽¹⁾	$	5.6	⁽¹⁾	$	2.8	$	(1.7	)	$	—	$	93.5
Contingent payment arrangements		77.6		—			5.4	⁽²⁾		—		—			—		83.0
Obligations to related parties		79.6		0.3	⁽³⁾		2.5	⁽³⁾		9.6		(24.1	)		—		67.9

	Level 3 Financial Assets and Financial Liabilities at Fair Value

Three Months Ended March 31, 2012	Balance, beginning of period		Net realized gains/losses			Net unrealized gains/losses relating to instruments still held at the reporting date			Purchases and issuances		Settlements and reductions			Net transfers in and/or out of Level 3		Balance, end of period
Other investments	$	103.4	$	(0.8	)⁽¹⁾	$	2.5	⁽¹⁾	$	4.8	$	(2.4	)	$	—	$	107.5
Contingent payment arrangements		87.1		—			(4.0	)⁽²⁾		—		—			—		83.1
Obligations to related parties		92.0		(0.3	)⁽³⁾		1.0	⁽³⁾		14.4		(29.5	)		—		77.6

(1): Gains and losses on Other investments are recorded in Investment and other income.
(2): Accretion and changes to payment estimates under the Company's contingent payment arrangements are recorded in Imputed interest expense and contingent payment arrangements and foreign currency translation adjustments related to such arrangements are recorded as Other comprehensive income.
(3): Gains and losses associated with agreements to repurchase Affiliate equity are recorded in Imputed interest expense and contingent payment arrangements. Gains and losses related to liabilities offsetting certain investments are recorded in Investment and other income.

During the three months ended March 31, 2012, financial assets valued at $2.0 million were transferred from Level 1 to Level 2. There were no significant transfers of financial assets or liabilities in the three months ended March 31, 2011.

The Company relies on the NAV of certain investments as their fair value. The NAVs have been derived from the fair values of the underlying investments as of the measurement dates. The following table summarizes, as of December 31, 2011 and March 31, 2012, the nature of these investments and any related liquidation restrictions or other factors which may impact the ultimate value realized:

	December 31, 2011				March 31, 2012

Category of Investment	Fair Value		Unfunded Commitments		Fair Value		Unfunded Commitments
Private equity fund-of-funds⁽¹⁾	$	103.4	$	80.5	$	107.5	$	84.4
Other funds⁽²⁾		47.2		—		67.5		—

	$	150.6	$	80.5	$	175.0	$	84.4

(1): These funds primarily invest in a broad range of private equity funds, as well as making direct investments. Distributions will be received as the underlying assets are liquidated over the life of the funds, generally 15 years.
(2): These are multi-disciplinary funds that invest across various asset classes and strategies including long/short equity, credit and real estate. Investments are generally redeemable on a daily or quarterly basis.

There are no current plans to sell any of these investments.

The carrying value of senior bank debt approximates fair value because the debt is a credit facility with variable interest based on selected short-term rates. The fair market value of the 2008 senior convertible notes and the junior convertible trust preferred securities at March 31, 2012 was $516.4 million and $664.0 million, respectively. These securities are classified as Level 2 because the fair value was determined utilizing observable inputs in non-active markets.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
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-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 820
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+ Details

Variable Interest Entities

3 Months Ended

Mar. 31, 2012

Variable Interest Entities

Variable Interest Entities

10. Variable Interest Entities

Sponsored Investment Funds

The Company's Affiliates act as the investment manager for certain investment funds that are considered variable interest entities ("VIEs"). In addition to an Affiliate's involvement as the investment manager, Affiliates may also hold investments in these products. Affiliates are not the primary beneficiary of these VIEs as their involvement is limited to that of a service provider and their investment, if any, represents an insignificant interest in the fund's assets under management. As a result, the Company's variable interests will not absorb the majority of the variability of the entity's net assets and therefore the Company has not consolidated these entities.

Trust Preferred Vehicles

The Company established wholly-owned trusts in connection with the 2006 and 2007 issuances of junior convertible trust preferred securities. These entities are considered VIEs and the Company is not the primary beneficiary, therefore these entities are not consolidated in the Company's financial statements.

The net assets and liabilities of these unconsolidated VIEs and the Company's maximum risk of loss related thereto are as follows:

	December 31, 2011				March 31, 2012

	Unconsolidated VIE Net Assets		Carrying Value and Maximum Exposure to Loss		Unconsolidated VIE Net Assets		Carrying Value and Maximum Exposure to Loss
Sponsored investment funds	$	3,618.4	$	1.1	$	4,104.6	$	1.6
Trust preferred vehicles		9.0		9.0		9.0		9.0

Related Party Transactions

3 Months Ended

Mar. 31, 2012

Related Party Transactions

Related Party Transactions

11. Related Party Transactions

The Company periodically records amounts receivable and payable to Affiliate partners in connection with the transfer of Affiliate equity interests. The Company also has liabilities to related parties for deferred purchase price and contingent payment arrangements in connection with certain business combinations as well as liabilities offsetting certain investments which are held by the Company but economically attributable to a related party.

The total receivable at December 31, 2011 was $41.3 million, of which $1.4 million is included in Prepaid expenses and other current assets and $39.9 million is included in Other assets. The total receivable at March 31, 2012 was $40.0 million, of which $1.5 million is included in Prepaid expenses and other current assets and $38.5 million is included in Other assets. The total payable as of December 31, 2011 was $147.5 million, of which $33.2 million is included in current liabilities and $114.3 million is included in Other long-term liabilities. The total payable as of March 31, 2012 was $132.2 million, of which $17.1 million is included in current liabilities and $115.1 million is included in Other long-term liabilities.

In certain cases, Affiliate management owners and Company officers may serve as trustees or directors of certain mutual funds from which the Affiliate earns advisory fee revenue.

- Definition

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph k

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 3A
-Section 04
-Paragraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 1-4
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Stock Option and Incentive Plans

3 Months Ended

Mar. 31, 2012

Stock Option and Incentive Plans

Stock Option and Incentive Plans

12. Stock Option and Incentive Plans

The following summarizes the transactions of the Company's stock option and incentive plans for the three months ended March 31, 2012:

			Weighted Average Exercise Price

Unexercised options outstanding—January 1, 2012	5.1		$	68.18
Options granted	0.0			107.63
Options exercised	(0.3	)		51.76
Options forfeited	(0.0	)		116.35

Unexercised options outstanding—March 31, 2012	4.8			69.19	4.3

Exercisable at March 31, 2012	2.7			62.91	3.6

The Company's Net income (controlling interest) for the three months ended March 31, 2011 includes compensation expense of $3.8 million (net of income tax benefits of $2.3 million) related to the Company's Stock Option and Incentive, Executive Incentive, Long-Term Equity Interests and Deferred Compensation Plans as compared to compensation expense of $5.0 million (net of income tax benefits of $3.1 million) for the three months ended March 31, 2012. As of March 31, 2012, the Company expects to recognize compensation expense related to these share-based compensation arrangements of $71.8 million over a weighted average period of approximately three years (assuming no forfeitures). As of March 31, 2012, no outstanding options have expiration dates prior to the end of 2012.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Derivative Financial Instruments

3 Months Ended

Mar. 31, 2012

Derivative Financial Instruments

Derivative Financial Instruments

13. Derivative Financial Instruments

From time to time, the Company seeks to offset its exposure to changing interest rates under its debt financing arrangements by entering into interest rate hedging contracts. The Company does not hold or issue derivative financial instruments for speculative purposes.

In 2010, the Company entered into interest rate swap contracts as summarized in the table below:

	Notional Amount				Receiving	Start Date	Expiration Date

Counterparty A	$	25.0	1.67	%	3-Month LIBOR	October 2010	October 2015
Counterparty A	$	25.0	1.65	%	3-Month LIBOR	October 2010	October 2015
Counterparty B	$	25.0	1.59	%	3-Month LIBOR	October 2010	October 2015
Counterparty B	$	25.0	2.14	%	3-Month LIBOR	October 2010	October 2017

During 2010 and 2011, the Company entered into a series of treasury rate lock contracts with a total notional value of $175.0 million which were settled in February 2011 and October 2011 for a net pre-tax loss of $0.7 million. These contracts were intended to hedge the risks associated with changes in interest rates on a fixed-rate debt issuance that is anticipated to occur prior to the end of the second quarter of 2012. The net loss on these contracts is reflected as a component of Other comprehensive income.

The Company's derivative contracts contain provisions that may require the Company or the counterparties to post collateral based upon the current fair value of the derivative contracts. As of March 31, 2012, the Company had posted collateral of $3.9 million related to its interest rate swap contracts.

The Company records all derivative instruments on the balance sheet at fair value. As cash flow hedges, the effective portion of the unrealized gain or loss on the derivative instruments is recorded in accumulated other comprehensive income as a separate component of stockholders' equity. Hedge effectiveness is measured by comparing the present value of the cumulative change in the expected future variable cash flows of the hedged contract with the present value of the cumulative change in the expected future variable cash flows of the hedged item. To the extent that the critical terms of the hedged item and the derivative are not identical, hedge ineffectiveness would be reported in earnings as Interest expense. Hedge ineffectiveness was not material in any periods presented. The Company does not expect to reclassify any material portion of the losses related to these derivative contracts into earnings in the next twelve months.

The following summarizes the location and amount of derivative instrument gains and losses (before taxes) reported in the Consolidated Statements of Comprehensive Income:

	For the Three Months Ended March 31,

	2011		2012
Cash Flow Hedges
Interest rate swaps	$	0.6	$	(0.1	)
Treasury rate locks		0.5		—

Total	$	1.1	$	(0.1	)

The following summarizes the location and fair values of derivative instruments on the Consolidated Balance Sheets:

	December 31, 2011			March 31, 2012

Cash Flow Hedges
Interest rate swaps⁽¹⁾	$	(2.9	)	$	(3.0	)

(1): Presented within Other long-term liabilities.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Segment Information

3 Months Ended

Mar. 31, 2012

Segment Information

Segment Information

14. Segment Information

Management has assessed and determined that the Company operates in three business segments representing the Company's three principal distribution channels: Mutual Fund, Institutional and High Net Worth, each of which has different client relationships.

Revenue in the Mutual Fund distribution channel is earned from advisory and sub-advisory relationships with all domestically-registered investment products as well as non-institutional investment products that are registered abroad. Revenue in the Institutional distribution channel is earned from relationships with public and private client entities, including pension plans, foundations and endowments. Revenue in the High Net Worth distribution channel is earned from relationships with wealthy individuals, family trusts and managed account programs.

Revenue earned from client relationships managed by Affiliates accounted for under the equity method is not consolidated with the Company's reported Revenue but instead is included (net of operating expenses, including amortization) in Income from equity method investments, and reported in the distribution channel in which the Affiliate operates. Income tax attributable to the profits of the Company's equity method Affiliates is reported within the Company's consolidated income tax provision.

In firms with revenue sharing arrangements, a certain percentage of revenue is allocated for use by management of an Affiliate in paying operating expenses of that Affiliate, including salaries and bonuses, and is called an "Operating Allocation." In reporting segment operating expenses, Affiliate expenses are allocated to a particular segment on a pro rata basis with respect to the revenue generated by that Affiliate in such segment. Generally, as revenue increases, additional compensation is typically paid to Affiliate management partners from the Operating Allocation. As a result, the contractual expense allocation pursuant to a revenue sharing arrangement may result in the characterization of any growth in profit margin beyond the Company's Owners' Allocation as an operating expense. All other operating expenses (excluding intangible amortization) and interest expense have been allocated to segments based on the proportion of cash flow distributions reported by Affiliates in each segment.

Statements of Income

	For the Three Months Ended March 31, 2011

	Mutual Fund			Institutional			High Net Worth			Total
Revenue	$	184.2		$	207.0		$	35.1		$	426.3
Operating expenses:
Depreciation and other amortization		4.1			19.7			2.1			25.9
Other operating expenses		126.4			127.0			22.1			275.5

		130.5			146.7			24.2			301.4

Operating income		53.7			60.3			10.9			124.9

Non-operating (income) and expenses:
Investment and other (income) loss		(2.3	)		(5.0	)		(1.4	)		(8.7	)
Income from equity method investments		(1.4	)		(7.7	)		(1.1	)		(10.2	)
Interest expense		10.8			14.6			2.3			27.7

		7.1			1.9			(0.2	)		8.8

Income before income taxes		46.6			58.4			11.1			116.1
Income taxes		11.7			12.8			2.2			26.7

Net income		34.9			45.6			8.9			89.4
Net income (non-controlling interests)		(18.3	)		(27.2	)		(4.8	)		(50.3	)

Net income (controlling interest)	$	16.6		$	18.4		$	4.1		$	39.1

	For the Three Months Ended March 31, 2012

	Mutual Fund			Institutional			High Net Worth			Total
Revenue	$	175.7		$	206.8		$	35.2		$	417.7
Operating expenses:
Depreciation and other amortization		12.0			19.9			1.9			33.8
Other operating expenses		123.0			129.7			22.4			275.1

		135.0			149.6			24.3			308.9

Operating income		40.7			57.2			10.9			108.8

Non-operating (income) and expenses:
Investment and other (income) loss		(4.0	)		(5.1	)		(1.3	)		(10.4	)
Income from equity method investments		(2.6	)		(10.5	)		(1.4	)		(14.5	)
Interest expense		0.9			13.2			2.0			16.1

		(5.7	)		(2.4	)		(0.7	)		(8.8	)

Income before income taxes		46.4			59.6			11.6			117.6
Income taxes		10.6			11.8			2.2			24.6

Net income		35.8			47.8			9.4			93.0
Net income (non-controlling interests)		(21.1	)		(28.9	)		(5.6	)		(55.6	)

Net income (controlling interest)	$	14.7		$	18.9		$	3.8		$	37.4

Total assets as of December 31, 2011	$	1,920.6		$	2,836.2		$	462.1		$	5,218.9
Total assets as of March 31, 2012	$	1,965.9		$	2,783.4		$	460.6		$	5,209.9

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Goodwill and Acquired Client Relationships

3 Months Ended

Mar. 31, 2012

Goodwill and Acquired Client Relationships

Goodwill and Acquired Client Relationships

15. Goodwill and Acquired Client Relationships

Consolidated

The following table presents the change in goodwill during the three months ended March 31, 2012:

	Mutual Fund		Institutional		High Net Worth		Total

Balance, as of December 31, 2011	$	785.0	$	1,071.4	$	260.9	$	2,117.3
Goodwill acquired		—		—		—		—
Foreign currency translation		1.6		4.3		2.6		8.5

Balance, as of March 31, 2012	$	786.6	$	1,075.7	$	263.5	$	2,125.8

The following table presents the changes in and the components of acquired client relationships at the Company's consolidated Affiliates during the three months ended March 31, 2012:

	Acquired Client Relationships

	Definite-lived								Indefinite-lived			Total
	Gross Book Value		Accumulated Amortization			Net Book Value			Net Book Value			Net Book Value
Balance as of December 31, 2011	$	970.5	$	(317.0	)	$	653.5		$	667.6		$	1,321.1
Amortization and impairment		—		(21.7	)		(21.7	)		(8.7	)		(30.4	)
Foreign currency translation		1.1		—			1.1			7.0			8.1

Balance as of March 31, 2012	$	971.6	$	(338.7	)	$	632.9		$	665.9		$	1,298.8

During the three months ended March 31, 2012, the Company determined that the fair value of the indefinite-lived intangible assets at one of its Affiliates, a manager of growth-oriented U.S. equity mutual funds, had declined below its carrying value and, accordingly, reduced the carrying value by $8.7 million to its fair value ($131.7 million). The fair value of these indefinite-lived assets was calculated using a discounted cash flow analysis, a Level 3 fair value measurement. The significant assumptions used in the valuation were a weighted average annual growth rate of approximately 3.0% and a discount rate of 16.0%. This impairment has been presented within Amortization of intangible assets in the Consolidated Statements of Income. During the second quarter of 2012, this Affiliate has experienced ongoing client redemptions, and the Company believes an additional impairment is likely in the second quarter of 2012.

For the Company's Affiliates that are consolidated, definite-lived acquired client relationships are amortized over their expected useful lives. As of March 31, 2012, these relationships were being amortized over a weighted average life of approximately ten years. Amortization expense for these relationships was $22.1 million for the three months ended March 31, 2011 as compared to $21.7 million for the three months ended March 31, 2012. The Company estimates that its consolidated annual amortization expense will be approximately $90.0 million for the next five years, assuming no additional investments in new or existing Affiliates.

Equity Method

The definite-lived acquired client relationships attributable to the Company's equity method investments are amortized over their expected useful lives. As of March 31, 2012, these relationships were being amortized over a weighted average life of approximately seven years. Amortization expense for these relationships was $8.4 million for the three months ended March 31, 2011 as compared to $8.2 million for the three months ended March 31, 2012. Assuming no additional investments in new or existing Affiliates, the Company estimates the annual amortization expense attributable to its current equity-method Affiliates for the next five years as follows:

Year Ending December 31,	Estimated Amortization Expense

2012	$	32.7
2013		32.7
2014		11.2
2015		2.7
2016		0.2

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Affiliate Equity

3 Months Ended

Mar. 31, 2012

Affiliate Equity

Affiliate Equity

16. Affiliate Equity

The Company periodically issues Affiliate equity interests to and repurchases Affiliate equity interests from its Affiliate partners. In these transactions, if the equity is issued for consideration below the fair value of the equity or repurchased for consideration above the fair value of the equity, then such difference is recorded as compensation expense over the requisite service period. The Company recognized compensation expense related to Affiliate equity of $5.2 million ($3.5 million attributable to the controlling interest) for the three months ended March 31, 2011 as compared to $6.3 million ($2.2 million attributable to the controlling interest) for the three months ended March 31, 2012.

Many of the Company's operating agreements provide the Company a conditional right to call and Affiliate partners the conditional right to put their retained equity interests at certain intervals. The purchase price of these conditional purchases are generally calculated based upon a multiple of the Affiliate's cash flow distributions, which is intended to represent fair value. Affiliate management partners are also permitted to sell their equity interests to other individuals or entities in certain cases, subject to the Company's approval or other restrictions. The Company, at its option, may pay for Affiliate equity purchases in cash, shares of its common stock or other forms of consideration and can consent to the transfer of these interests to other individuals or entities.

The current redemption value of these interests has been presented as Redeemable non-controlling interests on the Company's Consolidated Balance Sheets. Changes in the current redemption value are recorded to Additional paid-in capital. The following table presents the changes in Redeemable non-controlling interests during the period:


Balance as of January 1, 2012	$	451.8
Issuance of Redeemable non-controlling interest		7.0
Repurchase of Redeemable non-controlling interest		(11.2	)
Changes in redemption value		62.0

Balance as of March 31, 2012	$	509.6

During the three months ended March 31, 2011 and 2012, the Company acquired interests from and transferred interests to Affiliate management partners. The following schedule discloses the effect of changes in the Company's ownership interest in its Affiliates on the controlling interest's equity:

	For the Three Months Ended March 31,

	2011		2012
Net income (controlling interest)	$	39.1	$	37.4
Increase (decrease) in controlling interest paid-in capital from purchases and sales of Affiliate equity		3.8		(6.0	)

Change from Net income (controlling interest) and net transfers with non-controlling interests	$	42.9	$	31.4

Comprehensive Income

3 Months Ended

Mar. 31, 2012

Comprehensive Income

Comprehensive Income

17. Comprehensive Income

The following table shows the tax effects allocated to each component of other comprehensive income:

	For the Three Months Ended March 31, 2011

	Pre-Tax			Tax Benefit (Expense)			Net of Tax
Foreign currency translation adjustment	$	14.2		$	—		$	14.2
Change in net realized and unrealized gain on derivative securities		1.1			(0.4	)		0.7
Change in net unrealized loss on investment securities		(5.7	)		2.2			(3.5	)

Other comprehensive income	$	9.6		$	1.8		$	11.4

	For the Three Months Ended March 31, 2012

	Pre-Tax			Tax Benefit (Expense)			Net of Tax
Foreign currency translation adjustment	$	14.4		$	—		$	14.4
Change in net realized and unrealized loss on derivative securities		(0.1	)		0.0			(0.1	)
Change in net unrealized gain on investment securities		14.3			(5.2	)		9.1

Other comprehensive income	$	28.6		$	(5.2	)	$	23.4

The components of accumulated other comprehensive income, net of taxes, are as follows:

	December 31, 2011			Other Comprehensive Income			March 31, 2012

Foreign currency translation adjustments	$	57.7		$	14.4		$	72.1
Realized and unrealized losses on derivative securities		(2.2	)		(0.1	)		(2.3	)
Unrealized gain (loss) on investment securities		(5.5	)		9.1			3.6

Accumulated other comprehensive income		50.0			23.4			73.4
Accumulated other comprehensive income (non-controlling interests)		—			(1.7	)		(1.7	)

Accumulated other comprehensive income (controlling interest)	$	50.0		$	21.7		$	71.7

- Definition

The entire disclosure for comprehensive income. Includes, but is not limited to, the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14-26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Recent Accounting Developments

3 Months Ended

Mar. 31, 2012

Recent Accounting Developments

Recent Accounting Developments

18. Recent Accounting Developments

In May 2011, the Financial Accounting Standards Board issued an update to the fair value measurements and disclosures guidance. The new guidance clarifies existing fair value measurement principles and expands certain disclosure requirements, particularly for measurements categorized as Level 3. The amendment is effective for interim and fiscal periods beginning after December 15, 2011. The Company adopted this guidance in the first quarter of 2012. Adoption of this new guidance did not have a material impact on the Company's Consolidated Financial Statements.

Pending Investments

3 Months Ended

Mar. 31, 2012

Pending Investments

Pending Investments

19. Pending Investments

In March 2012, AMG Wealth Partners, LP, a subsidiary of AMG, announced an agreement to purchase an equity interest in Veritable, LP ("Veritable"). Veritable manages $11.1 billion in assets for ultra-high net worth individuals. Subject to customary closing conditions, regulatory approvals and compliance with other terms of the purchase agreement, the Company anticipates that AMG Wealth Partners' investment in Veritable will close in the second quarter of 2012.

In April 2012, the Company announced an agreement to purchase Yacktman Asset Management Co. ("Yacktman"). Yacktman manages $16.8 billion of assets, specializing in large-cap equities through a value-oriented approach. Subject to customary closing conditions, regulatory approvals and compliance with other terms of the purchase agreement, the Company anticipates that its investment in Yacktman will close in the third quarter of 2012.

Convertible Securities (Tables)

3 Months Ended

Mar. 31, 2012

Convertible Securities

Schedule of carrying amount and fair value of convertible notes

	December 31, 2011				March 31, 2012

	Carrying Value		Principal amount at maturity		Carrying Value		Principal amount at maturity
Senior convertible securities:
2008 senior convertible notes⁽¹⁾	$	435.6	$	460.0	$	439.2	$	460.0

Junior convertible trust preferred securities:
2007 junior convertible trust preferred securities⁽¹⁾	$	297.8	$	430.8	$	298.2	$	430.8
2006 junior convertible trust preferred securities⁽¹⁾		214.8		300.0		215.1		300.0

Total junior convertible securities	$	512.6	$	730.8	$	513.3	$	730.8

(1): Carrying value is accreted to the principal amount at maturity over an expected life of five years for the 2008 senior convertible notes and 30 years for each of the junior convertible trust preferred securities.

Schedule of principal terms of convertible notes

	2008 Senior Convertible Notes⁽¹⁾			2007 Junior Convertible Trust Preferred Securities⁽²⁾			2006 Junior Convertible Trust Preferred Securities⁽³⁾

Issue date		August 2008			October 2007			April 2006
Maturity date		August 2038			October 2037			April 2036
Next potential put date		August 2013			N/A			N/A
Denomination	$	1,000		$	50		$	50
Current conversion rate		7.959			0.250			0.333
Current conversion price	$	125.65		$	200.00		$	150.00
Stated coupon		3.95	%		5.15	%		5.10	%
Coupon frequency		Semi-annually			Quarterly			Quarterly
Tax deduction rate⁽⁴⁾		9.38	%		8.00	%		7.50	%

(1): The Company may redeem the notes for cash (subject to the holders' rights to convert) at any time on or after August 15, 2013. The holders may require the Company to repurchase the notes in August of 2013, 2018, 2023, 2028 and 2033.
(2): The Company may redeem the 2007 junior convertible trust preferred securities on or after October 15, 2012 if the closing price of the Company's common stock exceeds $260 per share for a specified period of time.
(3): The Company may redeem the 2006 junior convertible trust preferred securities if the closing price of the Company's common stock exceeds $195 per share for a specified period of time.

(4): These convertible securities are considered contingent payment debt instruments under federal income tax regulations, which require the Company to deduct interest in an amount greater than its reported Interest expense. These deductions will result in deferred tax liabilities of approximately $24.5 million in 2012. These deferred tax liabilities will be reclassified directly to stockholders' equity if the Company's common stock is trading above certain thresholds at the time of the conversion of the securities.

Income Taxes (Tables)

3 Months Ended

Mar. 31, 2012

Income Taxes

Schedule of income tax provision attributable to controlling interests and to non-controlling interests

	For the Three Months Ended March 31,

	2011			2012
Controlling Interests:
Current tax	$	13.5		$	8.0
Intangible related deferred taxes		12.9			9.9
Other deferred taxes		(2.8	)		2.9

Total controlling interests		23.6			20.8

Non-Controlling Interests:
Current tax	$	3.6		$	3.2
Deferred taxes		(0.5	)		0.6

Total non-controlling interests		3.1			3.8

Provision for income taxes	$	26.7		$	24.6

Income before income taxes (controlling interest)	$	62.7		$	58.2

Effective tax rate attributable to controlling interests⁽¹⁾		37.6	%		35.7	%

(1): Taxes attributable to the controlling interest divided by Income before income taxes (controlling interest).

Schedule of consolidated provision for income taxes

	For the Three Months Ended March 31,

	2011			2012
Current:
Federal	$	6.1		$	1.0
State		3.1			2.7
Foreign		7.9			7.5

Total current		17.1			11.2

Deferred:
Federal	$	11.3		$	13.4
State		0.7			1.1
Foreign		(2.4	)		(1.1	)

Total deferred		9.6			13.4

Provision for income taxes	$	26.7		$	24.6

Schedule of components of deferred tax assets and liabilities

	December 31, 2011			March 31, 2012

Deferred Tax Assets
State net operating loss carryforwards	$	26.5		$	26.2
Foreign tax credit carryforwards		15.1			13.7
Deferred compensation		17.5			18.7
Tax benefit of uncertain tax positions		11.6			11.9
Accrued expenses		11.6			9.6
Capital loss carryforwards		1.5			1.5

Total deferred tax assets		83.8			81.6
Valuation allowance		(35.6	)		(34.6	)

Deferred tax assets, net of valuation allowance	$	48.2		$	47.0

Deferred Tax Liabilities
Intangible asset amortization	$	(247.1	)	$	(257.3	)
Convertible securities interest		(171.1	)		(175.5	)
Non-deductible intangible amortization		(127.2	)		(126.5	)
Deferred revenue		(5.6	)		(10.5	)
Other		(3.2	)		(3.0	)

Total deferred tax liabilities		(554.2	)		(572.8	)

Net deferred tax liability	$	(506.0	)	$	(525.8	)

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share

Schedule of reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per share

	For the Three Months Ended March 31,

	2011		2012
Numerator:
Net income (controlling interest)	$	39.1	$	37.4

Denominator:
Average shares outstanding—basic		51.8		51.6
Effect of dilutive instruments:
Stock options and other awards		1.3		1.3

Average shares outstanding—diluted		53.1		52.9

Diluted earnings per share calculations excluding the anti-dilutive effect of shares

	For the Three Months Ended March 31,

	2011		2012
Stock options and other awards		0.6		1.2
Senior convertible securities		4.2		4.2
Junior convertible trust preferred securities		3.7		3.7

Investments (Tables)

3 Months Ended

Mar. 31, 2012

Investments

Summary of the cost, gross unrealized gains and losses and fair value of investments classified as available-for-sale

December 31, 2011

			Gross Unrealized

			Gross Unrealized					Fair Value
	Cost		Gains		Losses			Fair Value
Equity securities	$	97.6	$	1.4	$	(12.7	)	$	86.3

March 31, 2012

			Gross Unrealized

	Cost		Gains		Losses			Fair Value
Equity securities	$	92.1	$	12.0	$	(2.6	)	$	101.5

Summary of the Company's realized gains and losses on investments classified as available-for-sale

	For the Three Months Ended March 31,

	2011		2012
Gains	$	0.2	$	—
Losses		—		—

Net realized gains	$	0.2	$	—

Summary of the cost, gross unrealized gains and losses and fair value of investments classified as trading securities

December 31, 2011

			Gross Unrealized

			Gross Unrealized					Fair Value
	Cost		Gains		Losses			Fair Value
Equity securities	$	13.5	$	0.9	$	(0.3	)	$	14.1

March 31, 2012

			Gross Unrealized

			Gross Unrealized				Fair Value
	Cost		Gains		Losses		Fair Value
Equity securities	$	9.6	$	11.5	$	—	$	21.1

Summary of the Company's realized gains and losses on investments classified as trading securities

	For the Three Months Ended March 31,

	2011			2012
Gains	$	0.2		$	0.5
Losses		(0.3	)		(0.3	)

Net realized gains (losses)	$	(0.1	)	$	0.2

- Definition

Tabular disclosure of available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt.

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+ Details

- Definition

Tabular disclosure of the realized and unrealized gains and losses reported in the statement of income which have resulted from the sale and holding of marketable securities, respectively, as well as the sale or disposal of cost method investments. Such amounts would include realized gains and losses on the sale or disposal of trading, available-for-sale, and held-to-maturity securities, unrealized gains and losses on trading securities, unrealized gains and losses on available-for-sale and held-to-maturity securities transferred to the trading securities category, realized gains and losses on the sale or disposal of cost method investments, and losses recognized for other than temporary impairments (OTTI) of such investments.

+ References

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+ Details

- Definition

Tabular disclosure of trading securities (and certain trading assets) which consist of all investments in certain debt and equity securities (and other assets) that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.

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+ Details

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements

Schedule of fair value of assets and liabilities measured on a recurring basis

			Fair Value Measurements

	December 31, 2011		Fair Value Measurements
	December 31, 2011		Level 1		Level 2		Level 3
Financial Assets
Cash equivalents	$	23.2	$	23.2	$	—	$	—
Investments in marketable securities⁽¹⁾
Trading securities		14.1		14.1		—		—
Available-for-sale securities		86.3		86.3		—		—
Other investments⁽²⁾		145.3		31.1		10.8		103.4
Financial Liabilities
Contingent payment arrangements⁽³⁾	$	87.1	$	—	$	—	$	87.1
Obligations to related parties⁽⁴⁾		92.0		—		—		92.0
Interest rate derivatives		2.9		—		2.9		—

			Fair Value Measurements

	March 31, 2012		Fair Value Measurements
	March 31, 2012		Level 1		Level 2		Level 3
Financial Assets
Cash equivalents	$	12.3	$	12.3	$	—	$	—
Investments in marketable securities⁽¹⁾
Trading securities		21.1		21.1		—		—
Available-for-sale securities		101.5		101.5		—		—
Other investments⁽²⁾		157.0		34.5		15.0		107.5
Financial Liabilities
Contingent payment arrangements⁽³⁾	$	83.1	$	—	$	—	$	83.1
Obligations to related parties⁽⁴⁾		77.6		—		—		77.6
Interest rate derivatives		3.0		—		3.0		—

(1): Principally investments in equity securities.
(2): Other investments are reported within Prepaid expenses and other current assets and Other assets.
(3): Net present value of expected payments under contingent payment arrangements are reported in Accounts payable and accrued liabilities and Other long-term liabilities.
(4): Obligations to related parties are presented within Payables to related party and Other long-term liabilities.

Schedule of presents certain quantitative information about the significant unobservable inputs used in valuing our Level 3 liabilities:

	Quantitative Information about Level 3 Fair Value Measurements

	Fair Value at March 31, 2012		Valuation Techniques	Unobservable Input	Range
Contingent payment arrangements	$	83.1	Discounted cash flow	Growth rates	10.0% - 18.0%
				Discount rates	14.0% - 18.0%
Affiliate equity repurchase obligations		14.9	Discounted cash flow	Growth rates	8.0% - 17.5%
				Discount rates	16.0% - 24.0%

Schedule of changes in Level 3 assets and liabilities

	Level 3 Financial Assets and Financial Liabilities at Fair Value

Three Months Ended March 31, 2011	Balance, beginning of period		Net realized gains/losses			Net unrealized gains/losses relating to instruments still held at the reporting date			Purchases and issuances		Settlements and reductions			Net transfers in and/or out of Level 3		Balance, end of period
Other investments	$	85.7	$	1.1	⁽¹⁾	$	5.6	⁽¹⁾	$	2.8	$	(1.7	)	$	—	$	93.5
Contingent payment arrangements		77.6		—			5.4	⁽²⁾		—		—			—		83.0
Obligations to related parties		79.6		0.3	⁽³⁾		2.5	⁽³⁾		9.6		(24.1	)		—		67.9

	Level 3 Financial Assets and Financial Liabilities at Fair Value

Three Months Ended March 31, 2012	Balance, beginning of period		Net realized gains/losses			Net unrealized gains/losses relating to instruments still held at the reporting date			Purchases and issuances		Settlements and reductions			Net transfers in and/or out of Level 3		Balance, end of period
Other investments	$	103.4	$	(0.8	)⁽¹⁾	$	2.5	⁽¹⁾	$	4.8	$	(2.4	)	$	—	$	107.5
Contingent payment arrangements		87.1		—			(4.0	)⁽²⁾		—		—			—		83.1
Obligations to related parties		92.0		(0.3	)⁽³⁾		1.0	⁽³⁾		14.4		(29.5	)		—		77.6

(1): Gains and losses on Other investments are recorded in Investment and other income.
(2): Accretion and changes to payment estimates under the Company's contingent payment arrangements are recorded in Imputed interest expense and contingent payment arrangements and foreign currency translation adjustments related to such arrangements are recorded as Other comprehensive income.
(3): Gains and losses associated with agreements to repurchase Affiliate equity are recorded in Imputed interest expense and contingent payment arrangements. Gains and losses related to liabilities offsetting certain investments are recorded in Investment and other income.

Schedule of investments

	December 31, 2011				March 31, 2012

Category of Investment	Fair Value		Unfunded Commitments		Fair Value		Unfunded Commitments
Private equity fund-of-funds⁽¹⁾	$	103.4	$	80.5	$	107.5	$	84.4
Other funds⁽²⁾		47.2		—		67.5		—

	$	150.6	$	80.5	$	175.0	$	84.4

(1): These funds primarily invest in a broad range of private equity funds, as well as making direct investments. Distributions will be received as the underlying assets are liquidated over the life of the funds, generally 15 years.
(2): These are multi-disciplinary funds that invest across various asset classes and strategies including long/short equity, credit and real estate. Investments are generally redeemable on a daily or quarterly basis.

Variable Interest Entities (Tables)

3 Months Ended

Mar. 31, 2012

Variable Interest Entities

Schedule of net assets and liabilities and maximum risk of losses related to unconsolidated VIEs

	December 31, 2011				March 31, 2012

	Unconsolidated VIE Net Assets		Carrying Value and Maximum Exposure to Loss		Unconsolidated VIE Net Assets		Carrying Value and Maximum Exposure to Loss
Sponsored investment funds	$	3,618.4	$	1.1	$	4,104.6	$	1.6
Trust preferred vehicles		9.0		9.0		9.0		9.0

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph g
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 2, 14, 15, 16, 23, 24, 25, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 35
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6970148&loc=d3e5728-111685

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6970148&loc=d3e5710-111685

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6970148&loc=d3e5747-111685

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Variable Interest Entity
-URI http://asc.fasb.org/extlink&oid=6528138

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph C4
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Appendix D
-Paragraph 22B

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Appendix D
-Paragraph 22E

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Appendix D
-Paragraph 23A

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Appendix D
-Paragraph 24

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-URI http://asc.fasb.org/extlink&oid=6970148&loc=SL6759159-111685

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6970148&loc=SL6228884-111685

+ Details

Stock Option and Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2012

Stock Option and Incentive Plans

Summary of the Company's stock option plan activity

			Weighted Average Exercise Price

Unexercised options outstanding—January 1, 2012	5.1		$	68.18
Options granted	0.0			107.63
Options exercised	(0.3	)		51.76
Options forfeited	(0.0	)		116.35

Unexercised options outstanding—March 31, 2012	4.8			69.19	4.3

Exercisable at March 31, 2012	2.7			62.91	3.6

Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Derivative Financial Instruments

Schedule of interest rate swap agreements

	Notional Amount				Receiving	Start Date	Expiration Date

Counterparty A	$	25.0	1.67	%	3-Month LIBOR	October 2010	October 2015
Counterparty A	$	25.0	1.65	%	3-Month LIBOR	October 2010	October 2015
Counterparty B	$	25.0	1.59	%	3-Month LIBOR	October 2010	October 2015
Counterparty B	$	25.0	2.14	%	3-Month LIBOR	October 2010	October 2017

Schedule of location and amount of derivative instrument gains and (losses) before taxes

	For the Three Months Ended March 31,

	2011		2012
Cash Flow Hedges
Interest rate swaps	$	0.6	$	(0.1	)
Treasury rate locks		0.5		—

Total	$	1.1	$	(0.1	)

Schedule of location and fair values of derivative instruments on the Consolidated Balance Sheet

	December 31, 2011			March 31, 2012

Cash Flow Hedges
Interest rate swaps⁽¹⁾	$	(2.9	)	$	(3.0	)

(1): Presented within Other long-term liabilities.

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Segment Information

Schedule of segment information

	For the Three Months Ended March 31, 2011

	Mutual Fund			Institutional			High Net Worth			Total
Revenue	$	184.2		$	207.0		$	35.1		$	426.3
Operating expenses:
Depreciation and other amortization		4.1			19.7			2.1			25.9
Other operating expenses		126.4			127.0			22.1			275.5

		130.5			146.7			24.2			301.4

Operating income		53.7			60.3			10.9			124.9

Non-operating (income) and expenses:
Investment and other (income) loss		(2.3	)		(5.0	)		(1.4	)		(8.7	)
Income from equity method investments		(1.4	)		(7.7	)		(1.1	)		(10.2	)
Interest expense		10.8			14.6			2.3			27.7

		7.1			1.9			(0.2	)		8.8

Income before income taxes		46.6			58.4			11.1			116.1
Income taxes		11.7			12.8			2.2			26.7

Net income		34.9			45.6			8.9			89.4
Net income (non-controlling interests)		(18.3	)		(27.2	)		(4.8	)		(50.3	)

Net income (controlling interest)	$	16.6		$	18.4		$	4.1		$	39.1

	For the Three Months Ended March 31, 2012

	Mutual Fund			Institutional			High Net Worth			Total
Revenue	$	175.7		$	206.8		$	35.2		$	417.7
Operating expenses:
Depreciation and other amortization		12.0			19.9			1.9			33.8
Other operating expenses		123.0			129.7			22.4			275.1

		135.0			149.6			24.3			308.9

Operating income		40.7			57.2			10.9			108.8

Non-operating (income) and expenses:
Investment and other (income) loss		(4.0	)		(5.1	)		(1.3	)		(10.4	)
Income from equity method investments		(2.6	)		(10.5	)		(1.4	)		(14.5	)
Interest expense		0.9			13.2			2.0			16.1

		(5.7	)		(2.4	)		(0.7	)		(8.8	)

Income before income taxes		46.4			59.6			11.6			117.6
Income taxes		10.6			11.8			2.2			24.6

Net income		35.8			47.8			9.4			93.0
Net income (non-controlling interests)		(21.1	)		(28.9	)		(5.6	)		(55.6	)

Net income (controlling interest)	$	14.7		$	18.9		$	3.8		$	37.4

Total assets as of December 31, 2011	$	1,920.6		$	2,836.2		$	462.1		$	5,218.9
Total assets as of March 31, 2012	$	1,965.9		$	2,783.4		$	460.6		$	5,209.9

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Goodwill and Acquired Client Relationships (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill and Acquired Client Relationships

Schedule of changes in goodwill

	Mutual Fund		Institutional		High Net Worth		Total

Balance, as of December 31, 2011	$	785.0	$	1,071.4	$	260.9	$	2,117.3
Goodwill acquired		—		—		—		—
Foreign currency translation		1.6		4.3		2.6		8.5

Balance, as of March 31, 2012	$	786.6	$	1,075.7	$	263.5	$	2,125.8

Schedule of changes in and the components of acquired client relationships

	Acquired Client Relationships

	Definite-lived								Indefinite-lived			Total
	Gross Book Value		Accumulated Amortization			Net Book Value			Net Book Value			Net Book Value
Balance as of December 31, 2011	$	970.5	$	(317.0	)	$	653.5		$	667.6		$	1,321.1
Amortization and impairment		—		(21.7	)		(21.7	)		(8.7	)		(30.4	)
Foreign currency translation		1.1		—			1.1			7.0			8.1

Balance as of March 31, 2012	$	971.6	$	(338.7	)	$	632.9		$	665.9		$	1,298.8

Schedule of annual amortization expense attributable to current equity method Affiliates for next five years

Year Ending December 31,	Estimated Amortization Expense

2012	$	32.7
2013		32.7
2014		11.2
2015		2.7
2016		0.2

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

Affiliate Equity (Tables)

3 Months Ended

Mar. 31, 2012

Affiliate Equity

Schedule of the changes in redeemable non-controlling interests


Balance as of January 1, 2012	$	451.8
Issuance of Redeemable non-controlling interest		7.0
Repurchase of Redeemable non-controlling interest		(11.2	)
Changes in redemption value		62.0

Balance as of March 31, 2012	$	509.6

Schedule of the effect of changes in the entity's ownership interest in its affiliates on the controlling interest's equity

	For the Three Months Ended March 31,

	2011		2012
Net income (controlling interest)	$	39.1	$	37.4
Increase (decrease) in controlling interest paid-in capital from purchases and sales of Affiliate equity		3.8		(6.0	)

Change from Net income (controlling interest) and net transfers with non-controlling interests	$	42.9	$	31.4

- Definition

Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 40
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 41
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 42
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 44
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 25
-Appendix A

+ Details

Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2012

Comprehensive Income

Summary of the tax effects allocated to each component of other comprehensive income

	For the Three Months Ended March 31, 2011

	Pre-Tax			Tax Benefit (Expense)			Net of Tax
Foreign currency translation adjustment	$	14.2		$	—		$	14.2
Change in net realized and unrealized gain on derivative securities		1.1			(0.4	)		0.7
Change in net unrealized loss on investment securities		(5.7	)		2.2			(3.5	)

Other comprehensive income	$	9.6		$	1.8		$	11.4

	For the Three Months Ended March 31, 2012

	Pre-Tax			Tax Benefit (Expense)			Net of Tax
Foreign currency translation adjustment	$	14.4		$	—		$	14.4
Change in net realized and unrealized loss on derivative securities		(0.1	)		0.0			(0.1	)
Change in net unrealized gain on investment securities		14.3			(5.2	)		9.1

Other comprehensive income	$	28.6		$	(5.2	)	$	23.4

Schedule of components of accumulated other comprehensive income, net of taxes

	December 31, 2011			Other Comprehensive Income			March 31, 2012

Foreign currency translation adjustments	$	57.7		$	14.4		$	72.1
Realized and unrealized losses on derivative securities		(2.2	)		(0.1	)		(2.3	)
Unrealized gain (loss) on investment securities		(5.5	)		9.1			3.6

Accumulated other comprehensive income		50.0			23.4			73.4
Accumulated other comprehensive income (non-controlling interests)		—			(1.7	)		(1.7	)

Accumulated other comprehensive income (controlling interest)	$	50.0		$	21.7		$	71.7

Senior Bank Debt (Details) $ in Millions	3 Months Ended
Senior Bank Debt (Details) $ in Millions	Mar. 31, 2012 USD ($)
Amended credit facility
Senior Bank Debt
Maximum borrowing capacity	$ 1,000.0
Revolving credit facility
Senior Bank Debt
Maximum borrowing capacity	750.0
Principal amount maturing on November, 2016	$ 720.0
Term of debt (in years)	5 years
Remaining principal amount maturing on January, 2015	$ 30.0
Option to increase the borrowing capacity under revolving credit facility	150.0
Term loan
Senior Bank Debt
Maximum borrowing capacity	$ 250.0
Term of debt (in years)	5 years
Option to increase the borrowing capacity under revolving credit facility	$ 250.0

Convertible Securities (Details)	3 Months Ended
Convertible Securities (Details)	Mar. 31, 2012 USD ($) security $ / shares	Dec. 31, 2011 USD ($)
Convertible Securities
Carrying Value	$ 439,200,000	$ 435,600,000
Carrying Value	513,300,000	512,600,000
Principal amount at maturity	730,800,000	730,800,000
Principal terms of Convertible Debt Securities
Deferred tax liabilities	$ 24,500,000
2008 senior convertible notes
Debt
Number of securities outstanding \| security	1
Convertible Securities
Carrying Value	$ 439,200,000	435,600,000
Principal amount at maturity	$ 460,000,000	460,000,000
Term of debt (in years)	5 years
Principal terms of Convertible Debt Securities
Denomination	$ 1,000
Current conversion rate	7.959
Current conversion price (in dollars per share) \| $ / shares	$ 125.65
Stated coupon (as a percent)	3.95%
Tax deduction rate (as a percent)	9.38%
Junior convertible trust preferred securities
Debt
Number of securities outstanding \| security	2
2007 junior convertible trust preferred securities
Convertible Securities
Carrying Value	$ 298,200,000	297,800,000
Principal amount at maturity	$ 430,800,000	430,800,000
Term of debt (in years)	30 years
Principal terms of Convertible Debt Securities
Denomination	$ 50
Current conversion rate	0.250
Current conversion price (in dollars per share) \| $ / shares	$ 200.00
Stated coupon (as a percent)	5.15%
Tax deduction rate (as a percent)	8.00%
Minimum stock price for convertible notes to be redeemed (in dollars per share) \| $ / shares	$ 260
2006 junior convertible trust preferred securities
Convertible Securities
Carrying Value	$ 215,100,000	214,800,000
Principal amount at maturity	$ 300,000,000	$ 300,000,000
Term of debt (in years)	30 years
Principal terms of Convertible Debt Securities
Denomination	$ 50
Current conversion rate	0.333
Current conversion price (in dollars per share) \| $ / shares	$ 150.00
Stated coupon (as a percent)	5.10%
Tax deduction rate (as a percent)	7.50%
Minimum stock price for convertible notes to be redeemed (in dollars per share) \| $ / shares	$ 195

Forward Equity Sale Agreements (Details) $ in Millions	1 Months Ended
Forward Equity Sale Agreements (Details) $ in Millions	Jul. 31, 2011 USD ($) agreement
Forward equity sale agreements
Number of agreements under the forward equity sale agreements \| agreement	2
Value of common stock to sell under each agreement, maximum \| $	$ 300.0

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Income tax provision
Current tax	$ 11.2	$ 17.1
Deferred taxes	13.4	9.6
Provision for income taxes	24.6	26.7
Controlling Interests:
Income tax provision
Current tax	8.0	13.5
Intangible related deferred taxes	9.9	12.9
Other deferred taxes	2.9	(2.8)
Provision for income taxes	20.8	23.6
Income before income taxes (controlling interest)	$ 58.2	$ 62.7
Effective tax rate attributable to controlling interests (as a percent)	35.70%	37.60%
Non-controlling interests
Income tax provision
Current tax	$ 3.2	$ 3.6
Deferred taxes	0.6	(0.5)
Provision for income taxes	$ 3.8	$ 3.1

Income Taxes (Details 2) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details 2) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Current:
Federal	$ 1.0	$ 6.1
State	2.7	3.1
Foreign	7.5	7.9
Total current	11.2	17.1
Deferred:
Federal	13.4	11.3
State	1.1	0.7
Foreign	(1.1)	(2.4)
Total deferred	13.4	9.6
Provision for income taxes	$ 24.6	$ 26.7

Income Taxes (Details 3) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details 3) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Deferred Tax Assets
State net operating loss carryforwards	$ 26.2	$ 26.5
Foreign tax credit carryforwards	13.7	15.1
Deferred compensation	18.7	17.5
Tax benefit of uncertain tax positions	11.9	11.6
Accrued expenses	9.6	11.6
Capital loss carryforwards	1.5	1.5
Total deferred tax assets	81.6	83.8
Valuation allowance	(34.6)	(35.6)
Deferred tax assets, net of valuation allowance	47.0	48.2
Deferred Tax Liabilities
Intangible asset amortization	(257.3)	(247.1)
Convertible securities interest	(175.5)	(171.1)
Non-deductible intangible amortization	(126.5)	(127.2)
Deferred revenue	(10.5)	(5.6)
Other	(3.0)	(3.2)
Total deferred tax liabilities	(572.8)	(554.2)
Net deferred tax liability	$ (525.8)	$ (506.0)
State net operating loss carryforwards, expiration period (in years)	15 years
Foreign tax credit carryforwards, expiration period (in years)	10 years
Liability for uncertain tax positions including interest and related charges	$ 21.8
Accrued income tax interest and related charges	$ 1.7

Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Numerator:
Net income (controlling interest)	$ 37.4	$ 39.1
Denominator:
Average shares outstanding - basic (in shares)	51.6	51.8
Effect of dilutive instruments:
Stock options and other awards (in shares)	1.3	1.3
Average shares outstanding - diluted (in shares)	52.9	53.1
Stock transactions:
Shares repurchased under share repurchase programs	0.3
Stock options and other awards
Anti-dilutive securities
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares)	1.2	0.6
Senior convertible notes
Anti-dilutive securities
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares)	4.2	4.2
Junior convertible trust preferred securities
Anti-dilutive securities
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares)	3.7	3.7

Commitments and Contingencies (Details) $ in Millions	3 Months Ended
Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2012 USD ($)
Commitments and Contingencies
Acquisition agreements contingency liability	$ 496.3
Expected payments to settle contingent obligations	99.9
Net present value of expected payments to settle contingent obligations	83.1
Expected payments to settle contingent obligations in 2012	72.0
Recognized gain under past acquisition agreements	9.9
Recognized gain attributable to the controlling interest	5.0
Pantheon
Commitments and Contingencies
Co-investment commitments in partnership	80.6
Pantheon \| Russell
Commitments and Contingencies
Reimbursable amount of investment commitments	$ 45.6

Investments (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Cost of investments in marketable securities, gross unrealized gains and losses
Total investment	$ 122.6	$ 100.4
Value Partners Group Limited ("Value Partners")
Cost of investments in marketable securities, gross unrealized gains and losses
Total investment	$ 83.3
Outstanding common stock (as a percent)	7.80%

Investments (Details 2) - USD ($) $ in Millions	3 Months Ended
Investments (Details 2) - USD ($) $ in Millions	Mar. 31, 2011	Mar. 31, 2012	Dec. 31, 2011
Summary of the Company's realized gains and losses on investments classified as available-for-sale
Gains	$ 0.2
Net realized gains	$ 0.2
Equity securities
Summary of the cost, gross unrealized gains and losses and fair value of investments classified as available-for-sale
Cost		$ 92.1	$ 97.6
Gross Unrealized Gains		12.0	1.4
Gross Unrealized Losses		(2.6)	(12.7)
Fair Value		$ 101.5	$ 86.3

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References + Details

Investments (Details 3) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Investments (Details 3) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Summary of the Company's realized gains and losses on investments classified as trading securities
Gains	$ 0.5	$ 0.2
Losses	(0.3)	(0.3)
Net realized gains (losses)	0.2	$ (0.1)
Cost Method Investments
Value of cost method investments	14.6		$ 14.6
Other Investments
Other investments	157.0		145.3
Other investments reported within Prepaid expenses and other current assets	37.4		31.2
Other investments reported within Other assets	119.6		114.1
Equity securities
Summary of the cost, gross unrealized gains and losses and fair value of investments classified as trading securities
Cost	9.6		13.5
Gross Unrealized Gains	11.5		0.9
Gross Unrealized Losses			(0.3)
Fair Value	$ 21.1		$ 14.1

Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Financial Assets
Other investments	$ 175.0	$ 150.6
Fair value measured on a recurring basis \| Fair value
Financial Assets
Cash equivalents	12.3	23.2
Trading securities	21.1	14.1
Available-for-sale securities	101.5	86.3
Other investments	157.0	145.3
Financial Liabilities
Contingent payment arrangements	83.1	87.1
Obligations to related parties	77.6	92.0
Interest rate derivatives	3.0	2.9
Fair value measured on a recurring basis \| Level 1
Financial Assets
Cash equivalents	12.3	23.2
Trading securities	21.1	14.1
Available-for-sale securities	101.5	86.3
Other investments	34.5	31.1
Fair value measured on a recurring basis \| Level 2
Financial Assets
Other investments	15.0	10.8
Financial Liabilities
Interest rate derivatives	3.0	2.9
Fair value measured on a recurring basis \| Level 3
Financial Assets
Other investments	107.5	103.4
Financial Liabilities
Contingent payment arrangements	83.1	87.1
Obligations to related parties	$ 77.6	$ 92.0

Fair Value Measurements (Details 2) $ in Millions	3 Months Ended
Fair Value Measurements (Details 2) $ in Millions	Mar. 31, 2012 USD ($)
Contingent payment arrangements
Quantitative information for Level 3 Fair Value Measurements Liabilities
Fair value Liabilities	$ 83.1
Contingent payment arrangements \| Discounted cash flow \| Minimum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Growth rate	10.00%
Discount rate	14.00%
Contingent payment arrangements \| Discounted cash flow \| Maximum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Growth rate	18.00%
Discount rate	18.00%
Affiliate equity repurchase obligations
Quantitative information for Level 3 Fair Value Measurements Liabilities
Fair value Liabilities	$ 14.9
Affiliate equity repurchase obligations \| Discounted cash flow \| Minimum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Growth rate	8.00%
Discount rate	16.00%
Affiliate equity repurchase obligations \| Discounted cash flow \| Maximum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Growth rate	17.50%
Discount rate	24.00%

Fair Value Measurements (Details 3) - USD ($) $ in Millions	3 Months Ended
Fair Value Measurements (Details 3) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Changes in level 3 assets and liabilities
Transfers of financial assets from level 1 to level 2	$ 2.0
Other investments
Changes in level 3 assets and liabilities
Balance at the beginning of the period	103.4	$ 85.7
Net realized gains/losses	(0.8)	1.1
Net unrealized gains/losses relating to instruments still held at the reporting date	2.5	5.6
Purchases and issuances	4.8	2.8
Settlements and reductions	(2.4)	(1.7)
Balance at the end of period	107.5	93.5
Contingent payment arrangements
Changes in level 3 assets and liabilities
Balance at the beginning of the period	87.1	77.6
Net unrealized gains/losses relating to instruments still held at the reporting date	(4.0)	5.4
Balance at the end of period	83.1	83.0
Obligations to related parties
Changes in level 3 assets and liabilities
Balance at the beginning of the period	92.0	79.6
Net realized gains/losses	(0.3)	0.3
Net unrealized gains/losses relating to instruments still held at the reporting date	1.0	2.5
Purchases and issuances	14.4	9.6
Settlements and reductions	(29.5)	(24.1)
Balance at the end of period	$ 77.6	$ 67.9

Fair Value Measurements (Details 4) $ in Millions	Mar. 31, 2012 USD ($) Y	Dec. 31, 2011 USD ($)
NAV of investments at fair value
Fair Value	$ 175.0	$ 150.6
Unfunded Commitments	84.4	80.5
Fair market value of 2008 senior convertible notes	516.4
Fair market value of junior convertible trust preferred securities	664.0
Private equity fund-of-funds
NAV of investments at fair value
Fair Value	107.5	103.4
Unfunded Commitments	$ 84.4	80.5
Liquidation of underlying assets over the life of the funds (in years) \| Y	15
Other funds
NAV of investments at fair value
Fair Value	$ 67.5	$ 47.2

Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Sponsored investment funds
Variable Interest Entities
Unconsolidated VIE Net Assets	$ 4,104.6	$ 3,618.4
Carrying Value and Maximum Exposure to Loss	1.6	1.1
Trust preferred vehicles
Variable Interest Entities
Unconsolidated VIE Net Assets	9.0	9.0
Carrying Value and Maximum Exposure to Loss	$ 9.0	$ 9.0

Related Party Transactions (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Related Party Transactions
Payable to related parties, current	$ 17.1	$ 33.2
Affiliate partners
Related Party Transactions
Receivables from related parties	40.0	41.3
Receivable from related parties, included in Prepaid expenses and other current assets	1.5	1.4
Receivable from related parties, included in Other Assets	38.5	39.9
Payable to related parties, current	17.1	33.2
Payable to related parties, included in Other long-term liabilities	115.1	114.3
Payable to related parties	$ 132.2	$ 147.5

- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph k
-Subparagraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 2
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 7
-Section 03
-Paragraph 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 16, 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.3)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(3))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

- Definition

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

+ References + Details

- Definition

Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle).

+ References + Details

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties.

+ References + Details

Stock Option and Incentive Plans (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) Y $ / shares shares	Mar. 31, 2011 USD ($)
Recent share based compensation expense
Share Based Compensation Expense \| $	$ 5.0	$ 3.8
Tax Benefit \| $	3.1	$ 2.3
Compensation expense related to share-based compensation \| $	$ 71.8
Weighted average period over which compensation expense will be recognized (in years) \| Y	3
Stock Option and Incentive Plan
Summary of transactions of stock option and incentive plans:
Unexercised options outstanding at the beginning of the period (in shares) \| shares	5,100,000
Options granted (in shares) \| shares	0
Options exercised (in shares) \| shares	(300,000)
Options forfeited (in shares) \| shares	0
Unexercised options outstanding at the end of the period (in shares) \| shares	4,800,000
Exercisable at the end of the period (in shares) \| shares	2,700,000
Weighted Average Exercise Price
Unexercised options outstanding at the beginning of the period (in dollars per share) \| $ / shares	$ 68.18
Options granted (in dollars per share) \| $ / shares	107.63
Options exercised (in dollars per share) \| $ / shares	51.76
Options forfeited (in dollars per share) \| $ / shares	116.35
Unexercised options outstanding at the end of the period (in dollars per share) \| $ / shares	69.19
Exercisable at the end of the period (in dollars per share) \| $ / shares	$ 62.91
Weighted Average Remaining Contractual Life (years)
Unexercised options outstanding at the end of the period (in years) \| Y	4.3
Exercisable at the end of the period (in years) \| Y	3.6

Derivative Financial Instruments (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Oct. 31, 2011	Feb. 28, 2011	Dec. 31, 2010	Mar. 31, 2012	Dec. 31, 2011
Interest rate swaps
Derivative financial instruments
Fair value of collateral posted				$ 3.9
Interest rate swaps \| Counterparty A paying 1.67% interest
Derivative financial instruments
Notional amount of interest rate derivative agreements			$ 25.0
Derivative reference rate			3-Month LIBOR
Interest rate swaps \| Counterparty A paying 1.65% interest
Derivative financial instruments
Notional amount of interest rate derivative agreements			$ 25.0
Derivative reference rate			3-Month LIBOR
Interest rate swaps \| Counterparty B paying 1.59% interest
Derivative financial instruments
Notional amount of interest rate derivative agreements			$ 25.0
Derivative reference rate			3-Month LIBOR
Interest rate swaps \| Counterparty B paying 2.14% interest
Derivative financial instruments
Notional amount of interest rate derivative agreements			$ 25.0
Derivative reference rate			3-Month LIBOR
Treasury rate locks
Derivative financial instruments
Notional amount of interest rate derivative agreements			$ 175.0		$ 175.0
Net pre-tax unrealized gain (loss) on the derivative instruments	$ 0.7	$ 0.7

Derivative Financial Instruments (Details 2) - Cash Flow Hedges - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Summary of the location and amount of derivative instrument gains and losses (before taxes) reported in the Consolidated Statements of Income
Amount of Gain (Loss) Recognized in Other Comprehensive Income	$ (0.1)	$ 1.1
Interest rate swaps
Summary of the location and amount of derivative instrument gains and losses (before taxes) reported in the Consolidated Statements of Income
Amount of Gain (Loss) Recognized in Other Comprehensive Income	$ (0.1)	0.6
Treasury rate locks
Summary of the location and amount of derivative instrument gains and losses (before taxes) reported in the Consolidated Statements of Income
Amount of Gain (Loss) Recognized in Other Comprehensive Income		$ 0.5

Derivative Financial Instruments (Details 3) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Interest rate swaps
Fair values of derivative instruments
Cash Flow Hedges, Fair value of derivative assets	$ (3.0)	$ (2.9)

Segment Information (Details) $ in Millions	3 Months Ended
Segment Information (Details) $ in Millions	Mar. 31, 2012 USD ($) Segment Channel	Mar. 31, 2011 USD ($)	Dec. 31, 2011 USD ($)
Segment Information
Number of operating segments \| Segment	3
Number of principal distribution channels \| Channel	3
Statements of Income
Revenue	$ 417.7	$ 426.3
Operating expenses:
Depreciation and other amortization	33.8	25.9
Other operating expenses	275.1	275.5
Total operating expenses	308.9	301.4
Operating income	108.8	124.9
Non-operating (income) and expenses:
Investment and other income	(10.4)	(8.7)
Income from equity method investments, net of amortization	(14.5)	(10.2)
Interest expense	16.1	27.7
Total non-operating (income) and expenses	(8.8)	8.8
Income before income taxes	117.6	116.1
Income taxes	24.6	26.7
Net income	93.0	89.4
Net income (non-controlling interests)	(55.6)	(50.3)
Net income (controlling interest)	37.4	39.1
Balance Sheet Information
Total assets	5,209.9		$ 5,218.9
Mutual Fund
Statements of Income
Revenue	175.7	184.2
Operating expenses:
Depreciation and other amortization	12.0	4.1
Other operating expenses	123.0	126.4
Total operating expenses	135.0	130.5
Operating income	40.7	53.7
Non-operating (income) and expenses:
Investment and other income	(4.0)	(2.3)
Income from equity method investments, net of amortization	(2.6)	(1.4)
Interest expense	0.9	10.8
Total non-operating (income) and expenses	(5.7)	7.1
Income before income taxes	46.4	46.6
Income taxes	10.6	11.7
Net income	35.8	34.9
Net income (non-controlling interests)	(21.1)	(18.3)
Net income (controlling interest)	14.7	16.6
Balance Sheet Information
Total assets	1,965.9		1,920.6
Institutional
Statements of Income
Revenue	206.8	207.0
Operating expenses:
Depreciation and other amortization	19.9	19.7
Other operating expenses	129.7	127.0
Total operating expenses	149.6	146.7
Operating income	57.2	60.3
Non-operating (income) and expenses:
Investment and other income	(5.1)	(5.0)
Income from equity method investments, net of amortization	(10.5)	(7.7)
Interest expense	13.2	14.6
Total non-operating (income) and expenses	(2.4)	1.9
Income before income taxes	59.6	58.4
Income taxes	11.8	12.8
Net income	47.8	45.6
Net income (non-controlling interests)	(28.9)	(27.2)
Net income (controlling interest)	18.9	18.4
Balance Sheet Information
Total assets	2,783.4		2,836.2
High Net Worth
Statements of Income
Revenue	35.2	35.1
Operating expenses:
Depreciation and other amortization	1.9	2.1
Other operating expenses	22.4	22.1
Total operating expenses	24.3	24.2
Operating income	10.9	10.9
Non-operating (income) and expenses:
Investment and other income	(1.3)	(1.4)
Income from equity method investments, net of amortization	(1.4)	(1.1)
Interest expense	2.0	2.3
Total non-operating (income) and expenses	(0.7)	(0.2)
Income before income taxes	11.6	11.1
Income taxes	2.2	2.2
Net income	9.4	8.9
Net income (non-controlling interests)	(5.6)	(4.8)
Net income (controlling interest)	3.8	$ 4.1
Balance Sheet Information
Total assets	$ 460.6		$ 462.1

Goodwill and Acquired Client Relationships (Details) $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($)
Changes in goodwill
Balance at the beginning of the period	$ 2,117.3
Foreign currency translation	8.5
Balance at the end of the period	2,125.8
Mutual Fund
Changes in goodwill
Balance at the beginning of the period	785.0
Foreign currency translation	1.6
Balance at the end of the period	786.6
Institutional
Changes in goodwill
Balance at the beginning of the period	1,071.4
Foreign currency translation	4.3
Balance at the end of the period	1,075.7
High Net Worth
Changes in goodwill
Balance at the beginning of the period	260.9
Foreign currency translation	2.6
Balance at the end of the period	$ 263.5

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill and Acquired Client Relationships (Details 2) $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) Y	Mar. 31, 2011 USD ($)
Indefinite-lived
Net book value balance at the beginning of the period	$ 667.6
Amortization and Impairment	(8.7)
Foreign currency translation	7.0
Net book value balance at the end of the period	665.9
Total intangible assets
Total,Net book value balance at the beginning of the period	1,321.1
Total, Amortization and Impairment	(30.4)
Total, Foreign currency translation	8.1
Total, Net book value balance at the end of the period	1,298.8
Annual amortization expense attributable to current equity method Affiliates for next five years
2012	32.7
2013	32.7
2014	11.2
2015	2.7
2016	0.2
Acquired client relationships-mutual fund management contracts
Indefinite-lived
Amortization and Impairment	(8.7)
Net book value balance at the end of the period	$ (131.7)
Indefinite-lived intangible assets fair value assumptions, weighted average annual growth rate (as a percent)	3.00%
Indefinite-lived intangible assets fair value assumptions, discount rate (as a percent)	16.00%
Acquired client relationships
Definite-lived
Gross book value balance at the beginning of the period	$ 970.5
Accumulated amortization balance at the beginning of the period	(317.0)
Net book value balance at the beginning of the period	653.5
Amortization and impairment	(21.7)
Foreign currency translation	1.1
Gross book value balance at the end of the period	971.6
Accumulated amortization balance at the end of the period	(338.7)
Net book value balance at the end of the period	$ 632.9
Amortization expenses
Weighted average life (in years) \| Y	10
Annual amortization expense for the next five years	$ 90.0
Number of annual periods of expected amortization expense (in years) \| Y	5
Amortization expense during the period	$ 21.7	$ 22.1
Acquired client relationships under equity method investments
Amortization expenses
Weighted average life (in years) \| Y	7
Number of annual periods of expected amortization expense (in years) \| Y	5
Amortization expense during the period	$ 8.2	$ 8.4

Affiliate Equity (Details) - USD ($) $ in Millions	3 Months Ended
Affiliate Equity (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Affiliate Equity
Compensation expenses related to Affiliate equity	$ 6.3	$ 5.2
Compensation expenses related to Affiliate equity, attributable to controlling interest	2.2	3.5
Changes in redeemable non-controlling interests during the period
Balance at the beginning of the period	451.8
Issuance of Redeemable non-controlling interest	7.0
Repurchase of Redeemable non-controlling interest	(11.2)
Changes in redemption value	62.0
Balance at the end of the period	509.6
Effect of changes in the Company's ownership interest in its Affiliates on the controlling interest's equity
Net income (controlling interest)	37.4	39.1
Increase (decrease) in controlling interest paid-in capital from purchase and sales of Affiliate equity	(6.0)	3.8
Change from Net income (controlling interest) and net transfers with non-controlling interests	$ 31.4	$ 42.9

Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
Comprehensive Income (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Other Comprehensive Income (Loss), Pre-Tax
Foreign currency translation adjustment, Pre-Tax	$ 14.4	$ 14.2
Change in net realized and unrealized gain (loss) on derivative securities, Pre-Tax	(0.1)	1.1
Change in net unrealized gain (loss) on investment securities, Pre-Tax	14.3	(5.7)
Other comprehensive income, Pre-Tax	28.6	9.6
Other Comprehensive Income (Loss), Tax Expenses
Change in net realized and unrealized gain (loss) on derivative securities, Tax Benefit (Expense)	0.0	(0.4)
Change in net unrealized gain (loss) on investment securities, Tax Benefit (Expense)	(5.2)	2.2
Other comprehensive income, Tax Benefit (Expense)	(5.2)	1.8
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, Net of Tax	14.4	14.2
Change in net realized and unrealized gain (loss) on derivative securities, Net of Tax	(0.1)	0.7
Change in net unrealized gain (loss) on investment securities, Net of Tax	9.1	(3.5)
Other comprehensive income (loss), Net of Tax	$ 23.4	$ 11.4

Comprehensive Income (Details 2) - USD ($) $ in Millions	3 Months Ended
Comprehensive Income (Details 2) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Foreign currency translation adjustments	$ 72.1		$ 57.7
Realized and unrealized losses on derivative securities	(2.3)		(2.2)
Unrealized gain (loss) on investment securities	3.6		(5.5)
Accumulated other comprehensive income	73.4		50.0
Accumulated other comprehensive income (non-controlling interests)	(1.7)
Accumulated other comprehensive income (controlling interest)	71.7		$ 50.0
Foreign currency translation adjustment	14.4	$ 14.2
Change in net realized and unrealized gain (loss) on derivative securities, net of tax	(0.1)	0.7
Change in net unrealized gain (loss) on investment securities, net of tax	9.1	(3.5)
Other comprehensive income	23.4	$ 11.4
Other comprehensive income (non-controlling interests)	(1.7)
Other comprehensive income (controlling interest)	$ 21.7

Pending Investments (Details) $ in Billions	Mar. 31, 2012 USD ($)
Veritable, LP
Pending Investments
Value of managed assets	$ 11.1
Yacktman Asset Management Co
Pending Investments
Value of managed assets	$ 16.8