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Schedule II—Valuation and Qualifying Accounts Schedule II—Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for doubtful accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year $ 5.4 $ 3.4 $ 2.7
Charged (credited) to costs and expenses 1.9 1.7 2.1
Other (1.7) 0.3 (1.4)
Balance at end of year 5.6 5.4 3.4
Allowance for deferred tax assets      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 11.3 10.0 10.7
Charged (credited) to costs and expenses 0.0 1.3 (0.7)
Other 10.7 0.0 0.0
Balance at end of year $ 0.6 $ 11.3 $ 10.0