Intangible Assets	9 Months Ended
Intangible Assets	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets Consolidated Affiliates The intangible assets of our consolidated Affiliates consist of definite and indefinite-lived acquired client relationships and goodwill. Definite-lived acquired client relationships are amortized over their expected useful lives. As of September 30, 2013, these relationships were being amortized over a weighted average life of approximately eleven years. The Company recognized amortization expense and a reduction in the carrying value of an indefinite-lived asset at one of its Affiliates of $24.0 million and $169.1 million, respectively, for the three and nine months ended September 30, 2012. The Company recognized amortization expense of $32.7 million and $98.1 million, respectively, for the three and nine months ended September 30, 2013. The Company estimates that its consolidated annual amortization expense will be approximately $100.0 million for each of the next five years, assuming no additional investments in new or existing Affiliates. Other than changes related to foreign currency translation, there were no significant changes to goodwill or indefinite-lived acquired client relationships during the three and nine months ended September 30, 2013. The Company performed its annual goodwill assessment as of September 30, 2013 and no impairments were identified. Equity Method Investments in Affiliates The intangible assets at our equity method Affiliates consist of definite-lived acquired client relationships and goodwill. Definite-lived acquired client relationships are amortized over their expected useful lives. As of September 30, 2013, these relationships were being amortized over a weighted average life of approximately nine years. The Company recognized amortization expense for these relationships of $10.2 million and $26.5 million, respectively, for three and nine months ended September 30, 2012 as compared to $10.4 million and $31.1 million, respectively, for the three and nine months ended September 30, 2013. Assuming no additional investments in new or existing Affiliates, the Company estimates the annual amortization expense for the next five years will be approximately $42.0 million in 2013, $20.0 million in 2014 and $10.0 million in each of 2015, 2016 and 2017. There were no significant changes to goodwill during the three and nine months ended September 30, 2013.

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.

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