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Contracts with Customers - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]          
Unbilled receivables, net $ 9,032   $ 9,032   $ 8,363
Advances and progress billings 57,962   57,962   $ 60,333
Contract with customer, liability, revenue recognized $ 5,254 $ 3,927 $ 16,431 $ 11,804