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Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Contract assets      
Unbilled receivables - reimbursable contracts $ 978   $ 854
Contract work in progress - lump-sum contracts 85   137
Contract assets 1,063   991
Information about contract liabilities:      
Revenue recognized that was included in contract liabilities as of January 1 478 $ 566  
Claim revenue for costs 609   531
Construction contract cost, subcontractor $ 23   $ 24