v3.26.1
Shareholders' Equity (Reclassification out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Interest expense $ (7.8) $ (8.6) $ (15.1) $ (17.1)
Tax impact (30.2) (27.5) (51.8) (49.1)
Derivative (Loss) Gain [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Total loss (income), net of tax [1] 0.4 0.0 [2] 0.7 (0.3) [2]
Pension And Postretirement Adjustments [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Total loss (income), net of tax [1] 0.7 0.7 1.3 1.3
Reclassification From Accumulated Other Comprehensive Loss [Member] | Derivative (Loss) Gain [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Tax impact (0.1) 0.0 (0.2) 0.1
Total loss (income), net of tax 0.4 0.0 0.7 (0.3)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Derivative (Loss) Gain [Member] | Interest Rate Swap Contracts, Before Tax [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Interest expense 0.5 0.0 0.9 (0.4)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Amortization of Prior Service Credit [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amortization of net actuarial loss 0.0 (0.1) 0.0 (0.1)
Reclassification From Accumulated Other Comprehensive Loss [Member] | Amortization of Net Actuarial Loss [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amortization of net actuarial loss 1.0 1.0 1.8 1.9
Reclassification From Accumulated Other Comprehensive Loss [Member] | Pension And Postretirement Adjustments [Member]        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Tax impact (0.3) (0.2) (0.5) (0.5)
Total loss, before tax 1.0 0.9 1.8 1.8
Total loss, net of tax 0.7 0.7 1.3 1.3
Total reclassifications for the period $ 1.1 $ 0.7 $ 2.0 $ 1.0
[1] Amounts are net of tax.
[2] Amounts include our 50% share of AOCL components from our WAVE joint venture.