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Investments in Affiliates (Summarized Income Statement Information) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]      
Revenues $ 82,671 $ 78,586 $ 89,876
Net income 6,565 5,294 5,868
Equity Method Investments [Member]      
Schedule of Equity Method Investments [Line Items]      
Revenues 1,898 1,914 1,618
Equity Method Investments Summarized Financial Information, Operating Income 1,009 1,079 754
Net income $ 750 $ 786 $ 496