v3.26.1
Revenue (Schedule of Revenue by Contract Type) (Details) - USD ($)
$ in Millions
 3 Months Ended
Apr. 03, 2026
Apr. 04, 2025
Disaggregation of Revenue [Line Items]    
Total revenue $ 1,923 $ 2,018
Cost-Reimbursable    
Disaggregation of Revenue [Line Items]    
Total revenue 778 891
Time-and-Materials    
Disaggregation of Revenue [Line Items]    
Total revenue 563 591
Fixed Price    
Disaggregation of Revenue [Line Items]    
Total revenue 582 536
MTS    
Disaggregation of Revenue [Line Items]    
Total revenue 1,296 1,381
MTS | Cost-Reimbursable    
Disaggregation of Revenue [Line Items]    
Total revenue 771 891
MTS | Time-and-Materials    
Disaggregation of Revenue [Line Items]    
Total revenue 200 207
MTS | Fixed Price    
Disaggregation of Revenue [Line Items]    
Total revenue 325 283
STS    
Disaggregation of Revenue [Line Items]    
Total revenue 627 637
STS | Cost-Reimbursable    
Disaggregation of Revenue [Line Items]    
Total revenue 7 0
STS | Time-and-Materials    
Disaggregation of Revenue [Line Items]    
Total revenue 363 384
STS | Fixed Price    
Disaggregation of Revenue [Line Items]    
Total revenue $ 257 $ 253