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Contract Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Contract assets
Unbilled receivables - reimbursable contracts	$ 1,050	$ 854
Contract work in progress - lump sum contracts	88	137
Contract assets	1,138	991
Information about contract liabilities:
Revenue recognized that was included in contract liabilities as of January 1	511	616
Claim revenue for costs	773	531
Construction contract cost, subcontractor	$ 23	$ 24

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Contract Assets

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Information About Contract Liabilities

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Work in Progress, Contract Services

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of billed or unbilled claims or other similar items subject to uncertainty concerning their determination or ultimate realization under long-term contracts.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Amount of cost incurred on construction contract for unapproved change order, claim, or similar item subject to uncertainty.

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