v3.25.2
Fair Value (Carrying Amount And Estimated Fair Values Of Financial Instruments) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Fair Value Disclosures [Abstract]    
Long-term Debt (including current portion), Carrying Amount $ 15,756.0 $ 13,355.7
Long-term debt (including current portion), Estimated Fair Value $ 15,106.3 $ 12,505.2