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Goodwill (Details)
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Change in the carrying amount of goodwill  
Balance at the beginning of the period $ 2,003.8
Purchase price allocation adjustments (77.2)
Foreign currency translation loss (1.8)
Balance at the end of the period 1,924.8
Accumulated impairment losses $ 0.0