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Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Contract assets      
Unbilled receivables - reimbursable contracts $ 817   $ 822
Contract work in progress - lump-sum contracts 230   244
Contract assets 1,047   1,066
Advance billings deducted from contract assets 228   $ 208
Information about contract liabilities:      
Revenue recognized that was included in contract liabilities as of January 1 $ 741 $ 840