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Contract Assets and Liabilities (Schedule of Contract Assets and Contract Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]    
Contract assets $ 12,139 $ 11,534
Contract liabilities (17,183) (14,598)
Net contract liabilities $ (5,044) $ (3,064)