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Contract Assets and Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Contract assets
Unbilled receivables - reimbursable contracts	$ 1,348		$ 1,050
Contract work in progress - lump-sum contracts	86		88
Contract assets	1,434		1,138
Information about contract liabilities:
Revenue recognized that was included in contract liabilities as of January 1	541	$ 478
Claim revenue for costs	233		244
Construction contract cost, subcontractor	$ 92		$ 23

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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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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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