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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, 2023
Dec. 31, 2022
Dec. 31, 2021
Allowance for doubtful accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year $ 8.1 $ 5.6 $ 5.4
Charged (credited) to costs and expenses 0.6 3.9 1.9
Other (1.6) (1.4) (1.7)
Balance at end of year 7.1 8.1 5.6
Allowance for deferred tax assets      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 0.4 0.6 11.3
Charged (credited) to costs and expenses 0.0 0.0 0.0
Other 0.0 0.2 10.7
Balance at end of year $ 0.4 $ 0.4 $ 0.6