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Business Combinations - Schedule of Purchase Price Allocation for Investments (Details) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Southern Sun Asset Management and River Road Asset Management
Business Acquisition
Consideration paid			$ 240.3
Non-controlling interests			116.6
Enterprise value			356.9
Acquired client relationships			195.9
Tangible assets, net			11.0
Goodwill	2,491.0	2,341.7	150.0
Total			$ 356.9

X

- Definition

Represents the amount of Consideration Paid, Deferred Consideration, noncontrolling interest and Contingent payment obligations related to acquisition.

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Business Combination, Recognized Identifiable Assets Acquired, Tangible Assets

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- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

+ References

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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