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Stockholders' Equity - Reclassifications from Accumulated Other Comprehensive Loss (Details) - Amount Reclassified from Accumulated Other Comprehensive Loss - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of actuarial losses of defined benefit pension plans $ (0.7) $ (1.2)
Interest rate swaps (0.2) 0.2
Total before tax (0.9) (1.0)
Income tax benefit 0.2 0.3
Total reclassifications for the period, net of tax $ (0.7) $ (0.7)