v3.25.3
Revenues (Disaggregation of Revenue) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Oct. 03, 2025
Sep. 27, 2024
Oct. 03, 2025
Sep. 27, 2024
Disaggregation of Revenue [Line Items]        
Revenues $ 4,449 $ 4,169 $ 12,910 $ 12,227
United States        
Disaggregation of Revenue [Line Items]        
Revenues 4,104 3,830 11,878 11,214
International        
Disaggregation of Revenue [Line Items]        
Revenues 345 339 1,032 1,013
Cost-reimbursement and fixed-price-incentive-fee        
Disaggregation of Revenue [Line Items]        
Revenues 1,994 1,833 5,733 5,414
Firm-fixed-price        
Disaggregation of Revenue [Line Items]        
Revenues 1,912 1,781 5,508 5,159
Time-and-materials and fixed-price-level-of-effort        
Disaggregation of Revenue [Line Items]        
Revenues 543 555 1,669 1,654
National Security & Digital        
Disaggregation of Revenue [Line Items]        
Revenues 2,001 1,847 5,725 5,421
National Security & Digital | United States        
Disaggregation of Revenue [Line Items]        
Revenues 1,987 1,840 5,695 5,398
National Security & Digital | International        
Disaggregation of Revenue [Line Items]        
Revenues 14 7 30 23
National Security & Digital | Cost-reimbursement and fixed-price-incentive-fee        
Disaggregation of Revenue [Line Items]        
Revenues 1,107 980 3,127 2,874
National Security & Digital | Firm-fixed-price        
Disaggregation of Revenue [Line Items]        
Revenues 555 511 1,566 1,497
National Security & Digital | Time-and-materials and fixed-price-level-of-effort        
Disaggregation of Revenue [Line Items]        
Revenues 339 356 1,032 1,050
Health & Civil        
Disaggregation of Revenue [Line Items]        
Revenues 1,296 1,223 3,849 3,670
Health & Civil | United States        
Disaggregation of Revenue [Line Items]        
Revenues 1,293 1,222 3,843 3,666
Health & Civil | International        
Disaggregation of Revenue [Line Items]        
Revenues 3 1 6 4
Health & Civil | Cost-reimbursement and fixed-price-incentive-fee        
Disaggregation of Revenue [Line Items]        
Revenues 443 433 1,344 1,331
Health & Civil | Firm-fixed-price        
Disaggregation of Revenue [Line Items]        
Revenues 809 737 2,355 2,176
Health & Civil | Time-and-materials and fixed-price-level-of-effort        
Disaggregation of Revenue [Line Items]        
Revenues 44 53 150 163
Commercial & International        
Disaggregation of Revenue [Line Items]        
Revenues 570 577 1,703 1,645
Commercial & International | United States        
Disaggregation of Revenue [Line Items]        
Revenues 248 257 733 692
Commercial & International | International        
Disaggregation of Revenue [Line Items]        
Revenues 322 320 970 953
Commercial & International | Cost-reimbursement and fixed-price-incentive-fee        
Disaggregation of Revenue [Line Items]        
Revenues 99 94 284 269
Commercial & International | Firm-fixed-price        
Disaggregation of Revenue [Line Items]        
Revenues 347 378 1,051 1,049
Commercial & International | Time-and-materials and fixed-price-level-of-effort        
Disaggregation of Revenue [Line Items]        
Revenues 124 105 368 327
Defense Systems        
Disaggregation of Revenue [Line Items]        
Revenues 582 522 1,633 1,491
Defense Systems | United States        
Disaggregation of Revenue [Line Items]        
Revenues 576 511 1,607 1,458
Defense Systems | International        
Disaggregation of Revenue [Line Items]        
Revenues 6 11 26 33
Defense Systems | Cost-reimbursement and fixed-price-incentive-fee        
Disaggregation of Revenue [Line Items]        
Revenues 345 326 978 940
Defense Systems | Firm-fixed-price        
Disaggregation of Revenue [Line Items]        
Revenues 201 155 536 437
Defense Systems | Time-and-materials and fixed-price-level-of-effort        
Disaggregation of Revenue [Line Items]        
Revenues 36 41 119 114
DoD and U.S. Intelligence Community        
Disaggregation of Revenue [Line Items]        
Revenues 2,243 2,014 6,367 5,874
DoD and U.S. Intelligence Community | National Security & Digital        
Disaggregation of Revenue [Line Items]        
Revenues 1,456 1,281 4,106 3,749
DoD and U.S. Intelligence Community | Health & Civil        
Disaggregation of Revenue [Line Items]        
Revenues 241 243 763 755
DoD and U.S. Intelligence Community | Commercial & International        
Disaggregation of Revenue [Line Items]        
Revenues 10 15 22 29
DoD and U.S. Intelligence Community | Defense Systems        
Disaggregation of Revenue [Line Items]        
Revenues 536 475 1,476 1,341
Other U.S. government agencies        
Disaggregation of Revenue [Line Items]        
Revenues 1,652 1,636 4,912 4,784
Other U.S. government agencies | National Security & Digital        
Disaggregation of Revenue [Line Items]        
Revenues 513 540 1,536 1,585
Other U.S. government agencies | Health & Civil        
Disaggregation of Revenue [Line Items]        
Revenues 1,034 964 3,028 2,867
Other U.S. government agencies | Commercial & International        
Disaggregation of Revenue [Line Items]        
Revenues 89 114 285 268
Other U.S. government agencies | Defense Systems        
Disaggregation of Revenue [Line Items]        
Revenues 16 18 63 64
Commercial and non-U.S. customers        
Disaggregation of Revenue [Line Items]        
Revenues 554 519 1,631 1,569
Commercial and non-U.S. customers | National Security & Digital        
Disaggregation of Revenue [Line Items]        
Revenues 32 26 83 87
Commercial and non-U.S. customers | Health & Civil        
Disaggregation of Revenue [Line Items]        
Revenues 21 16 58 48
Commercial and non-U.S. customers | Commercial & International        
Disaggregation of Revenue [Line Items]        
Revenues 471 448 1,396 1,348
Commercial and non-U.S. customers | Defense Systems        
Disaggregation of Revenue [Line Items]        
Revenues $ 30 $ 29 $ 94 $ 86