XML 64 R51.htm IDEA: XBRL DOCUMENT v3.8.0.1
Equity Method Investments in Affiliates - Aggregate Purchase Price Allocation (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]          
Deferred Tax Liability $ (702.3)   $ (702.3)   $ (660.8)
Goodwill 2,661.8   2,661.8   2,628.1
Intangible amortization and impairments 21.2 $ 26.9 65.1 $ 82.2  
Acquired Client Relationships          
Schedule of Equity Method Investments [Line Items]          
Definite-lived acquired client relationships 441.8   441.8   501.9
Indefinite-lived acquired client relationships 1,025.4   1,025.4   995.5
Equity Method Investee | Acquired Client Relationships          
Schedule of Equity Method Investments [Line Items]          
Intangible amortization and impairments $ 25.9 $ 14.0 $ 71.7 $ 43.0  
Equity Method Investee | 2016 New Seven Equity Method Investments          
Schedule of Equity Method Investments [Line Items]          
Consideration paid         1,362.3
Tangible assets         2.0
Deferred Tax Liability         (91.8)
Goodwill         854.4
Equity Method Investments         1,362.3
Equity Method Investee | 2016 New Seven Equity Method Investments | Acquired Client Relationships          
Schedule of Equity Method Investments [Line Items]          
Definite-lived acquired client relationships         560.8
Indefinite-lived acquired client relationships         $ 36.9