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Partnerships and Joint Ventures - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Cooec Fluor Heavy Industries Co. Limited
Variable interest entity information
Future funding commitments				$ 26
Cooec Fluor Heavy Industries Co. Limited
Variable interest entity information
Impairment expense		$ 28	$ 86
Ownership interest (as a percent)	49.00%
Infrastructure Joint Venture | Discontinued Operations, Disposed of by Sale | Urban Solutions
Variable interest entity information
Ownership interest (as a percent)		10.00%
Gain (loss) on sale of investments	$ 11	$ 20
Variable Interest Entity, Not Primary Beneficiary
Variable interest entity information
Net assets	46	68
Variable Interest Entity, Not Primary Beneficiary | Future funding commitment
Variable interest entity information
Future funding commitments	57
Variable Interest Entity, Not Primary Beneficiary | Accrued Liabilities
Variable interest entity information
Investments in loss position, included in other accrued liabilities	312	240
Variable Interest Entity, Not Primary Beneficiary | Accounts and notes receivable, net
Variable interest entity information
Receivables related to work performed for unconsolidated partnerships and joint ventures	$ 185	$ 205

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