v3.26.1
Income per Share (Schedule Of Basic And Diluted Weighted Average Common Shares Outstanding) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Apr. 03, 2026
Apr. 04, 2025
Net income attributable to KBR from continuing operations:    
Net income from continuing operations $ 103 $ 121
Less: Net income attributable to noncontrolling interests included in continuing operations 0 1
Net income attributable to KBR from continuing operations 103 120
Basic net income attributable to KBR from continuing operations 103 120
Diluted net income attributable to KBR from continuing operations 103 120
Net loss attributable to KBR from discontinued operations:    
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)
Basic net loss attributable to KBR from discontinued operations (1) (4)
Diluted net loss attributable to KBR from discontinued operations $ (1) $ (4)
Weighted average common shares outstanding:    
Basic weighted average common shares outstanding (in shares) 127 132
Diluted weighted average common shares outstanding (in shares) 127 132
Basic income per share    
Continuing operations (in usd per share) $ 0.81 $ 0.91
Discontinued operations (in usd per share) (0.01) (0.03)
Basic earnings per share attributable to KBR (in usd per share) 0.80 0.88
Diluted income per share    
Continuing operations (in usd per share) 0.81 0.91
Discontinued operations (in usd per share) (0.01) (0.03)
Diluted earnings per share attributable to KBR (in usd per share) $ 0.80 $ 0.88