v3.26.1
Discontinued Operations (Schedule of Components of Net Loss Attributable to KBR From Discontinued Operations) (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 03, 2026
Apr. 04, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net loss from discontinued operations, net of tax $ (2) $ (6)
Less: Net loss attributable to noncontrolling interests included in discontinued operations (1) (2)
Net loss attributable to KBR from discontinued operations (1) (4)
Abandonment | HomeSafe    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Revenues 0 37
Cost of revenues (1) (39)
Gross loss (1) (2)
Selling, general and administrative expenses (1) (5)
Operating loss (2) (7)
Loss from discontinued operations before income taxes (2) (7)
Provision for income taxes 0 1
Net loss from discontinued operations, net of tax (2) (6)
Less: Net loss attributable to noncontrolling interests included in discontinued operations (1) (2)
Net loss attributable to KBR from discontinued operations $ (1) $ (4)