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Unapproved Change Orders and Claims Against Clients (Tables)

12 Months Ended

Jan. 02, 2026

Contractors [Abstract]

Schedule of Unapproved Change Orders and Claims

The amounts of unapproved change orders and claims against clients included in determining the profit or loss on contracts that has been recorded to date are as follows:

Dollars in millions			Fiscal 2025						Fiscal 2024
Amounts included in project estimates-at-completion at beginning of fiscal year			$	104					$	74
Net increase in project estimates			67						57
Resolution of claim			—						(27)
Approved change orders			(146)						—
Amounts included in project-related estimates-at-completion at end of fiscal year			$	25					$	104
Amounts recognized over time based on progress			$	13					$	100

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- Definition

This element may be used to capture the disclosure pertaining to an entity's unapproved claims and change orders used in determining the profit or loss on contracts.

+ References

No definition available.

+ Details

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Namespace Prefix:	kbr_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_ContractorsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration