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Goodwill and Acquired Client Relationships (Tables) | 12 Months Ended
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Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Goodwill | The following tables present the change in Goodwill and components of Acquired client relationships, net of the Company’s consolidated Affiliates:
|  | Goodwill
|  | Institutional |  | Mutual Fund |  | High Net Worth |  | Total
Balance, as of December 31, 2013 |  | $ | 1,076.3 |  |  | $ | 928.1 |  |  | $ | 337.3 |  |  | $ | 2,341.7 |
Goodwill acquired |  | 97.2 |  |  | 208.1 |  |  | 39.2 |  |  | 344.5 |
Foreign currency translation |  | (14.4 | ) |  | (10.9 | ) |  | (8.1 | ) |  | (33.4 | )
Balance, as of December 31, 2014 |  | $ | 1,159.1 |  |  | $ | 1,125.3 |  |  | $ | 368.4 |  |  | $ | 2,652.8 |
Goodwill acquired |  | 9.2 |  |  | — |  |  | 55.1 |  |  | 64.3 |
Foreign currency translation |  | (27.0 | ) |  | (5.8 | ) |  | (15.9 | ) |  | (48.7 | )
Balance, as of December 31, 2015 |  | $ | 1,141.3 |  |  | $ | 1,119.5 |  |  | $ | 407.6 |  |  | $ | 2,668.4 |
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, 2013 |  | $ | 1,039.5 |  |  | $ | (442.8 | ) |  | $ | 596.7 |  |  | $ | 864.0 |  |  | $ | 1,460.7 |
New Investments |  | 220.3 |  |  | — |  |  | 220.3 |  |  | 244.7 |  |  | 465.0 |
Amortization and impairments |  | — |  |  | (122.2 | ) |  | (122.2 | ) |  | — |  |  | (122.2 | )
Foreign currency translation |  | (4.7 | ) |  | — |  |  | (4.7 | ) |  | (20.4 | ) |  | (25.1 | )
Balance, as of December 31, 2014 |  | $ | 1,255.1 |  |  | $ | (565.0 | ) |  | $ | 690.1 |  |  | $ | 1,088.3 |  |  | $ | 1,778.4 |
New Investments |  | 52.5 |  |  | — |  |  | 52.5 |  |  | — |  |  | 52.5 |
Amortization and impairments |  | — |  |  | (115.4 | ) |  | (115.4 | ) |  | — |  |  | (115.4 | )
Foreign currency translation |  | (5.8 | ) |  | — |  |  | (5.8 | ) |  | (23.3 | ) |  | (29.1 | )
Balance, as of December 31, 2015 |  | $ | 1,301.8 |  |  | $ | (680.4 | ) |  | $ | 621.4 |  |  | $ | 1,065.0 |  |  | $ | 1,686.4 |

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- Definition Tabular disclosure of intangibles assets, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: 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=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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