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Revenue - Schedule of Contract Asset and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Revenue From Contract With Customer [Abstract]        
Accounts receivable $ 104.5 $ 102.7    
Contract asset 7.7 8.6 $ 7.0 $ 11.0
Contract liability $ (9.9) $ (12.5) $ (11.3) $ (19.4)