XML 67 R53.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity Method Investments in Affiliates - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]          
Amortization expense during the period $ 23.2 $ 22.0 $ 46.4 $ 43.9  
Estimated Future Amortization Expense of Finite-Lived Intangibles          
Carrying value of equity method investment in affiliate 3,134.0   3,134.0   $ 3,304.7
Acquired Client Relationships          
Estimated Future Amortization Expense of Finite-Lived Intangibles          
Finite-lived intangible, future amortization expense in 2018 90.0   90.0    
Finite-lived intangible, future amortization expense in 2019 90.0   90.0    
Finite-lived intangible, future amortization expense in 2020 65.0   65.0    
Finite-lived intangible, future amortization expense in 2021 40.0   40.0    
Finite-lived intangible, future amortization expense in 2022 40.0   40.0    
Equity Method Investee          
Estimated Future Amortization Expense of Finite-Lived Intangibles          
Carrying value of equity method investment in affiliate 3,134.0   3,134.0   $ 3,304.7
Equity Method Investee | Investment One          
Estimated Future Amortization Expense of Finite-Lived Intangibles          
Impairment recognized on equity method investment in affiliate 33.3        
Impairment recognized on equity method investment in affiliate, net of tax 25.0        
Carrying value of equity method investment in affiliate 0.0   0.0    
Revenue from equity method investment in affiliate 290.9 259.2 601.7 524.8  
Net income from equity method investment in affiliate 138.8 144.4 308.4 293.0  
Equity Method Investee | Acquired Client Relationships          
Schedule of Equity Method Investments [Line Items]          
Amortization expense during the period 23.5 $ 24.0 53.5 $ 45.8  
Estimated Future Amortization Expense of Finite-Lived Intangibles          
Finite-lived intangible, future amortization expense in 2018 100.0   100.0    
Finite-lived intangible, future amortization expense in 2019 90.0   90.0    
Finite-lived intangible, future amortization expense in 2020 90.0   90.0    
Finite-lived intangible, future amortization expense in 2021 90.0   90.0    
Finite-lived intangible, future amortization expense in 2022 $ 90.0   $ 90.0