XML 85 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value Measurements (Details 2) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Business Acquisition, Contingent Consideration [Line Items]        
Additions $ 0.0 $ 0.0 $ 0.0 $ 0.0
Changes in fair value 30.0 5.9 61.2 18.8
Payments 0.0 0.0 (6.7) (3.2)
Fair Value, Measurements, Recurring        
Business Acquisition, Contingent Consideration [Line Items]        
Fair value, beginning of period 492.1 515.7 467.6 506.0
Fair value, end of period $ 522.1 $ 521.6 $ 522.1 $ 521.6