v3.26.3
Shareholders' Equity (Schedule of Accumulated Other Comprehensive Income (Loss) Activity (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance $ 884.3 $ 837.8 $ 900.7 $ 757.1
Ending Balance 893.8 889.2 893.8 889.2
Foreign Currency Translation Adjustments [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1] (3.6) (0.4) (0.5) (2.2)
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1] 0.3 (0.9) (2.8) 0.9
Amounts reclassified from accumulated other comprehensive (loss) [1] 0.0 0.0 0.0 0.0
Net current period other comprehensive (loss) income [1] 0.3 (0.9) (2.8) 0.9
Ending Balance [1] (3.3) (1.3) (3.3) (1.3)
Derivative (Loss) Gain [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1],[2] (0.3) (2.9) (2.6) (1.1)
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1],[2] 2.1 0.1 3.7 (1.4)
Amounts reclassified from accumulated other comprehensive (loss) [1],[2] 0.2 (0.1) 0.9 (0.4)
Net current period other comprehensive (loss) income [1],[2] 2.3 0.0 4.6 (1.8)
Ending Balance [1],[2] 2.0 (2.9) 2.0 (2.9)
Pension And Postretirement Adjustments [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1] (98.7) (105.6) (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 0.6 2.0 1.9
Net current period other comprehensive (loss) income [1] 0.7 0.6 2.0 1.9
Ending Balance [1] (98.0) (105.0) (98.0) (105.0)
Accumulated Other Comprehensive (Loss) [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance [1],[2] (102.6) (108.9) (103.1) (110.2)
Other comprehensive (loss) income before reclassifications, net of tax benefit (expense) [1],[2] 2.4 (0.8) 0.9 (0.5)
Amounts reclassified from accumulated other comprehensive (loss) [1],[2] 0.9 0.5 2.9 1.5
Net current period other comprehensive (loss) income [1],[2] 3.3 (0.3) 3.8 1.0
Ending Balance [1],[2] $ (99.3) $ (109.2) $ (99.3) $ (109.2)
[1] Amounts are net of tax.
[2] Amounts include our 50% share of AOCI components from our WAVE joint venture.