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Revenue - Schedule of Contract Asset and Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Revenue From Contract With Customer [Abstract]        
Accounts receivable $ 96.1 $ 102.7    
Contract asset 6.0 8.6 $ 10.2 $ 11.0
Contract liability $ (8.2) $ (12.5) $ (13.5) $ (19.4)