v3.25.4
Fair Value Measurements And Disclosure (Long-Term Debt And Other Financial Instruments) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Commercial Paper $ 0 $ 0
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes and debentures 134,718 122,116
Investment securities 1,609 1,603
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes and debentures 127,852 114,167
Investment securities $ 1,609 $ 1,603