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v3.25.2

Unapproved Change Orders and Claims Against Clients (Tables) | 6 Months Ended
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Jul. 04, 2025
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:
| Six Months Ended
| July 4, |  | June 28,
Dollars in millions | 2025 |  | 2024
Amounts included in project estimates-at-completion at beginning of fiscal year | $ | 104 |  |  | $ | 74 |
Net increase in project estimates | 57 |  |  | 41 |
Approved change orders | (128) |  |  | — |
Ending balance of amounts included in project estimates-at-completion | $ | 33 |  |  | $ | 115 |
Amounts recognized over time based on progress | $ | 31 |  |  | $ | 91 |

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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
Name: | kbr_ScheduleofUnapprovedClaimsandChangeOrdersTableTextBlock
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