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Contract Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Contract assets
Unbilled receivables - reimbursable contracts	$ 1,265		$ 1,050
Contract work in progress - lump-sum contracts	45		88
Contract assets	1,310		1,138
Information about contract liabilities:
Revenue recognized that was included in contract liabilities as of January 1	367	$ 278
Claim revenue for costs	230		244
Construction contract cost, subcontractor	$ 29		$ 23

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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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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
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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
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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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