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Supplemental Disclosures (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for Doubtful Accounts      
Beginning balance $ 1.1 $ 1.5 $ 1.7
Bad debt expense 0.3 1.0 0.4
Recoveries (0.1) 0.0 (0.3)
Write-offs and discounts 0.1 (1.4) (0.3)
Ending balance 1.4 1.1 1.5
Interest paid 47.4 31.4 29.1
Income taxes paid 22.4 14.8 20.8
Capital spending in accounts payable and accrued liabilities $ 6.3 $ 5.2 $ 5.9