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Revenue - Schedule of Contract Asset and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue From Contract With Customer [Abstract]      
Accounts receivable $ 102.7 $ 151.3  
Contract asset 8.6 11.0 $ 11.4
Contract liability $ (12.5) $ (19.4) $ (19.1)