v3.25.4
Pension and Postretirement Benefits (Components Of Net Periodic Benefits Cost) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 3.5 $ 3.6 $ 3.3
Interest cost 35.1 34.5 35.9
Expected return on plan assets (44.8) (49.9) (46.1)
Amortization of prior service cost 0.7 0.7 0.7
Amortization of net loss (gain) 14.2 15.1 15.5
Curtailment and settlement loss from discontinued operations 0.0 0.3 1.9
Net periodic cost (benefit) 8.7 4.3 11.2
Pension Benefits | Discontinued Operations      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic cost (benefit)   0.8 2.3
Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.0 0.0 0.0
Interest cost 0.1 0.1 0.2
Expected return on plan assets 0.0 0.0 0.0
Amortization of prior service cost 0.0 0.0 0.0
Amortization of net loss (gain) (0.4) (0.4) (0.2)
Curtailment and settlement loss from discontinued operations 0.0 0.0 0.0
Net periodic cost (benefit) $ (0.3) $ (0.3) $ 0.0