XML 77 R61.htm IDEA: XBRL DOCUMENT v3.19.1
Goodwill and Acquired Client Relationships - Schedule of Changes in Goodwill (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Goodwill [Roll Forward]  
Balance, as of December 31, 2018 $ 2,633.4
Foreign currency translation 9.0
Balance, as of March 31, 2019 $ 2,642.4