v3.25.4
Nature of Operations and Significant Accounting Policies (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance $ 1,638.7    
Adjustments To Additional Paid In Capital, Proceeds From Affiliates   $ (9.3) $ 813.8
Ending balance 2,061.1 1,638.7  
Tax benefit (83.3) (94.2) (103.0)
Total      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (61.9) (58.0) (503.3)
Other comprehensive (loss) income before reclassifications 71.1 (15.9) 19.2
Amounts reclassified from accumulated other comprehensive loss 10.8 12.0 11.6
Net period other comprehensive income 81.9 (3.9) 30.8
Adjustments To Additional Paid In Capital, Proceeds From Affiliates     (414.5)
Ending balance 20.0 (61.9) (58.0)
Defined Benefit Pension and Other Postretirement Items      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (244.3) (270.8) (271.9)
Other comprehensive (loss) income before reclassifications 19.7 14.5 (1.6)
Amounts reclassified from accumulated other comprehensive loss 10.8 12.0 11.6
Net period other comprehensive income 30.5 26.5 10.0
Adjustments To Additional Paid In Capital, Proceeds From Affiliates     8.9
Ending balance (213.8) (244.3) (270.8)
Currency Translation Adjustment      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance 182.4 212.8 (231.4)
Other comprehensive (loss) income before reclassifications 51.4 (30.4) 20.8
Amounts reclassified from accumulated other comprehensive loss 0.0 0.0 0.0
Net period other comprehensive income 51.4 (30.4) 20.8
Adjustments To Additional Paid In Capital, Proceeds From Affiliates     (423.4)
Ending balance $ 233.8 $ 182.4 $ 212.8