v3.26.1
Business Segment Information (Schedule of Operations by Reportable Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended
Apr. 03, 2026
Apr. 04, 2025
Jan. 02, 2026
Segment Reporting Information [Line Items]      
Revenues $ 1,923 $ 2,018  
Cost of revenues (1,658) (1,718)  
Gross profit 265 300  
Equity in earnings of unconsolidated affiliates 51 42  
Selling, general and administrative expenses (133) (140)  
Other (3) 0  
Operating income 180 202  
Interest expense (37) (41)  
Other non-operating income (expense) 0 3  
Income (loss) from continuing operations before income taxes 143 164  
Provision for income taxes (40) (43)  
Net income (loss) 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  
Depreciation and amortization 41 41  
Purchases of property, plant, and equipment (12) (2)  
Total assets 6,625   $ 6,584
MTS      
Segment Reporting Information [Line Items]      
Revenues 1,296 1,381  
Cost of revenues (1,127) (1,212)  
Gross profit 169 169  
Equity in earnings of unconsolidated affiliates 10 7  
Selling, general and administrative expenses (67) (64)  
Other (1) 1  
Operating income 111 113  
Interest expense 0 0  
Other non-operating income (expense)   (1)  
Income (loss) from continuing operations before income taxes 111 112  
Provision for income taxes 0 0  
Net income (loss) from continuing operations 111 112  
Less: Net income attributable to noncontrolling interests included in continuing operations   0  
Net income attributable to KBR from continuing operations 111 112  
Depreciation and amortization 25 26  
Purchases of property, plant, and equipment (7) 0  
Total assets 3,780   3,848
STS      
Segment Reporting Information [Line Items]      
Revenues 627 637  
Cost of revenues (531) (506)  
Gross profit 96 131  
Equity in earnings of unconsolidated affiliates 41 35  
Selling, general and administrative expenses (23) (39)  
Other (1) 0  
Operating income 113 127  
Interest expense 0 0  
Other non-operating income (expense)   0  
Income (loss) from continuing operations before income taxes 113 127  
Provision for income taxes 0 0  
Net income (loss) from continuing operations 113 127  
Less: Net income attributable to noncontrolling interests included in continuing operations   1  
Net income attributable to KBR from continuing operations 113 126  
Depreciation and amortization 10 9  
Purchases of property, plant, and equipment (1) 0  
Total assets 1,908   1,769
Corporate      
Segment Reporting Information [Line Items]      
Revenues 0 0  
Cost of revenues 0 0  
Gross profit 0 0  
Equity in earnings of unconsolidated affiliates 0 0  
Selling, general and administrative expenses (43) (37)  
Other (1) (1)  
Operating income (44) (38)  
Interest expense (37) (41)  
Other non-operating income (expense)   4  
Income (loss) from continuing operations before income taxes (81) (75)  
Provision for income taxes (40) (43)  
Net income (loss) from continuing operations (121) (118)  
Less: Net income attributable to noncontrolling interests included in continuing operations   0  
Net income attributable to KBR from continuing operations (121) (118)  
Depreciation and amortization 6 6  
Purchases of property, plant, and equipment (4) $ (2)  
Total assets $ 937   $ 967