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Accumulated Other Comprehensive Loss (Reclassifications from Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense $ 59.6 $ 68.8
Income tax expense (9.5) (0.3)
Amounts reclassified from accumulated other comprehensive loss to net loss (3.6) (3.7)
Reclassification of foreign currency translation adjustments (2.7) 0.0
Net pension income (14.5) (10.5)
Interest Rate Swap Adjustments    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amounts reclassified from accumulated other comprehensive loss to net loss (5.6) (3.6)
Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income tax expense 0.0 0.0
Amounts reclassified from accumulated other comprehensive loss to net loss 3.6 3.7
Reclassification of foreign currency translation adjustments (2.7) 0.0
Reclassification of foreign currency translation adjustments, net of tax (2.7) 0.0
Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Swap Adjustments    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense 7.1 3.6
Income tax expense 1.5 0.0
Amounts reclassified from accumulated other comprehensive loss to net loss (5.6) (3.6)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income tax expense 0.2 0.0
Amounts reclassified from accumulated other comprehensive loss to net loss 0.7 0.1
Net pension income 0.9 0.1
Pension Benefits    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net pension income $ (14.5) $ (10.5)