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Revenue - Schedule of Contract Asset Balances (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Contract Asset Balances with Customer    
Balance, beginning of year $ 8.6 $ 11.0
Additional contract assets 2.3 8.6
Reclassification to accounts receivable (8.6) (11.0)
Balance, end of year $ 2.3 $ 8.6