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Investments and Noncontrolling Interests (Summary of Equity Method Investment Financial Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]      
Revenues and other income $ 12,998 $ 11,933 $ 11,281
Costs and expenses 7,055 6,645 6,381
Net income 4,952 4,357 3,966
Assets, Current 3,994 3,276  
Liabilities, Current 3,249 3,235  
Equity Method Investment, Nonconsolidated Investee or Group of Investees      
Schedule of Equity Method Investments [Line Items]      
Revenues and other income 3,959 3,594 3,262
Costs and expenses 1,579 1,535 1,331
Income from operations 2,380 2,059 1,930
Net income 1,854 1,631 1,634
Assets, Current 1,347 1,570 1,531
Assets, Noncurrent 20,199 17,927 13,860
Liabilities, Current 1,044 746 979
Liabilities, Noncurrent $ 7,011 $ 6,711 $ 4,856