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v3.21.2

Unapproved Change Orders, and Claims, Against Clients and Estimated Recoveries of Claims Against Suppliers and Subcontractors (Tables) | 6 Months Ended
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Jun. 30, 2021
Contractors [Abstract] |
Schedule of unapproved claims and change orders | The amounts of unapproved change orders, and claims against clients and estimated recoveries of claims against suppliers and subcontractors included in determining the profit or loss on contracts are as follows:
Dollars in millions | June 30, 2021 |  | June 30, 2020
Amounts included in project estimates-at-completion at January 1, | $ | 1,048 |  |  | $ | 978 |
(Decrease) increase in project estimates | (228) |  |  | (1) |
Approved change orders | (11) |  |  | (6) |
Foreign currency impact | (1) |  |  | (16) |
Amounts included in project estimates-at-completion at June 30, | $ | 808 |  |  | $ | 955 |
Amounts recognized over time based on progress at June 30, | $ | 808 |  |  | $ | 955 |

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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