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Goodwill and Intangible Assets - Goodwill (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Goodwill [Roll Forward]  
Balance, December 31, 2018 $ 1,468.1
Foreign currency and other adjustments 2.1
Balance, March 31, 2019 $ 1,470.2