v3.26.1
Pension and Postretirement Health and Life Benefits (Schedule of Net Benefit Costs) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension Plan, Defined Benefit [Member]    
Service costs $ 0.1 $ 0.1
Interest costs 0.4 0.4
Expected return on plan assets (gains) (0.5) (0.5)
Net periodic benefit cost (credit) 0.0 0.0
Postretirement Health and Life Benefits Plans [Member]    
Interest costs 1.1 1.1
Net periodic benefit cost (credit) $ 1.1 $ 1.1