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Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Contract assets      
Unbilled receivables - reimbursable contracts $ 908   $ 738
Contract work in progress - lump-sum contracts 155   177
Contract assets 1,063   915
Advance billings deducted from contract assets 211   220
Information about contract liabilities:      
Revenue recognized that was included in contract liabilities as of January 1 566 $ 812  
Claim revenue for costs 648   498
Construction contract cost, subcontractor $ 20   $ 0