Contract Assets and Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Contract assets
Unbilled receivables - reimbursable contracts	$ 849		$ 738
Contract work in progress - lump-sum contracts	183		177
Contract assets	1,032		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	471	$ 741
Claim revenue for costs	586		498
Construction contract cost, subcontractor	$ 20		$ 0