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Business Combinations, Goodwill by Segment (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Goodwill [Line Items] |  |
Intangible Assets, Net (Including Goodwill) | $ 2,496.4 |
Finite-Lived Intangible Assets, Net | 220.8 |
Identifiable intangibles with indefinite useful lives | 12.9 |
Goodwill [Roll Forward] |  |
Goodwill | 2,141.5 | $ 1,907.9
Goodwill Additions, net of adjustments | 152.5 | 44.0
Goodwill, Translation Adjustments | (31.3) | (18.6)
Goodwill | 2,262.7 | 1,933.3
Investment Management [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 17.6 | 18.4
Goodwill Additions, net of adjustments | 0.0 | 0.0
Goodwill, Translation Adjustments | (1.1) | 0.1
Goodwill | 16.5 | 18.5
Americas [Member] | Reportable Subsegments [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 1,161.1 | 1,008.3
Goodwill Additions, net of adjustments | 102.7 | 10.0
Goodwill, Translation Adjustments | 0.9 | (0.6)
Goodwill | 1,264.7 | 1,017.7
EMEA [Member] | Reportable Subsegments [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 696.2 | 650.4
Goodwill Additions, net of adjustments | 36.6 | 15.3
Goodwill, Translation Adjustments | (34.7) | (14.1)
Goodwill | 698.1 | 651.6
Asia Pacific [Member] | Reportable Subsegments [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 266.6 | 230.8
Goodwill Additions, net of adjustments | 13.2 | 18.7
Goodwill, Translation Adjustments | 3.6 | (4.0)
Goodwill | $ 283.4 | $ 245.5

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- Definition The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation. Also includes purchase price allocation adjustment for allocations not yet complete at the prior year end. + References No definition available. + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition 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. + 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 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
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