v3.26.1
Shareholders' Equity (Schedule of Accumulated Other Comprehensive Income (Loss) Activity (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance $ 892.9 $ 793.4 $ 900.7 $ 757.1
Ending Balance 884.3 837.8 884.3 837.8
Foreign Currency Translation Adjustments [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1] (1.2) (1.9) (0.5) (2.2)
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1] (2.4) 1.5 (3.1) 1.8
Amounts reclassified from accumulated other comprehensive (loss) [1] 0.0 0.0 0.0 0.0
Net current period other comprehensive (loss) income [1] (2.4) 1.5 (3.1) 1.8
Ending Balance [1] (3.6) (0.4) (3.6) (0.4)
Derivative Gain (Loss) [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1] (1.5) (2.6) [2] (2.6) (1.1) [2]
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1] 0.8 (0.3) [2] 1.6 (1.5) [2]
Amounts reclassified from accumulated other comprehensive (loss) [1] 0.4 0.0 [2] 0.7 (0.3) [2]
Net current period other comprehensive (loss) income [1] 1.2 (0.3) [2] 2.3 (1.8) [2]
Ending Balance [1] (0.3) (2.9) [2] (0.3) (2.9) [2]
Pension And Postretirement Adjustments [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1] (99.4) (106.3) (100.0) (106.9)
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1] 0.0 0.0 0.0 0.0
Amounts reclassified from accumulated other comprehensive (loss) [1] 0.7 0.7 1.3 1.3
Net current period other comprehensive (loss) income [1] 0.7 0.7 1.3 1.3
Ending Balance [1] (98.7) (105.6) (98.7) (105.6)
Accumulated Other Comprehensive (Loss) [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1] (102.1) (110.8) [2] (103.1) (110.2) [2]
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1] (1.6) 1.2 [2] (1.5) 0.3 [2]
Amounts reclassified from accumulated other comprehensive (loss) [1] 1.1 0.7 [2] 2.0 1.0 [2]
Net current period other comprehensive (loss) income [1] (0.5) 1.9 [2] 0.5 1.3 [2]
Ending Balance [1] $ (102.6) $ (108.9) [2] $ (102.6) $ (108.9) [2]
[1] Amounts are net of tax.
[2] Amounts include our 50% share of AOCL components from our WAVE joint venture.