XML 102 R83.htm IDEA: XBRL DOCUMENT v3.6.0.2
Equity Method Investments in Affiliates - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Schedule of Equity Method Investments      
Amortization period for tax deductible goodwill   15 years  
Amortization expense during the period $ 110.2 $ 115.4 $ 122.2
Undistributed earnings from equity method affiliates $ 134.3    
Acquired Client Relationships Under Equity Method Investments      
Schedule of Equity Method Investments      
Amortization period for tax deductible goodwill 15 years    
Payment of contingent payment liability $ 23.3    
Weighted average life 14 years    
Amortization expense during the period $ 59.2 $ 34.3  
Annual amortization expense Year 1 80.0    
Annual amortization expense Year 2 80.0    
Annual amortization expense Year 3 80.0    
Annual amortization expense Year 4 80.0    
Annual amortization expense Year 5 $ 80.0