v3.26.1
Revenue (Schedule of Revenue by Customer 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
MTS    
Disaggregation of Revenue [Line Items]    
Total revenue 1,296 1,381
STS    
Disaggregation of Revenue [Line Items]    
Total revenue 627 637
U.S. Government Defense and Intelligence Clients    
Disaggregation of Revenue [Line Items]    
Total revenue 816 906
U.S. Government Defense and Intelligence Clients | MTS    
Disaggregation of Revenue [Line Items]    
Total revenue 816 906
U.S. Government Defense and Intelligence Clients | STS    
Disaggregation of Revenue [Line Items]    
Total revenue 0 0
U.S. Government Federal Civilian Clients    
Disaggregation of Revenue [Line Items]    
Total revenue 262 281
U.S. Government Federal Civilian Clients | MTS    
Disaggregation of Revenue [Line Items]    
Total revenue 262 281
U.S. Government Federal Civilian Clients | STS    
Disaggregation of Revenue [Line Items]    
Total revenue 0 0
International Government Clients    
Disaggregation of Revenue [Line Items]    
Total revenue 238 219
International Government Clients | MTS    
Disaggregation of Revenue [Line Items]    
Total revenue 192 167
International Government Clients | STS    
Disaggregation of Revenue [Line Items]    
Total revenue 46 52
Commercial and Infrastructure Clients    
Disaggregation of Revenue [Line Items]    
Total revenue 607 612
Commercial and Infrastructure Clients | MTS    
Disaggregation of Revenue [Line Items]    
Total revenue 26 27
Commercial and Infrastructure Clients | STS    
Disaggregation of Revenue [Line Items]    
Total revenue $ 581 $ 585