v3.26.1
Fair Value (Carrying Amount And Estimated Fair Values Of Financial Instruments) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value Disclosures [Abstract]    
Long-term Debt (including current portion), Carrying Amount $ 16,711.0 $ 15,477.5
Long-term debt (including current portion), Estimated Fair Value $ 16,015.4 $ 14,975.3