v3.24.1.u1
Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)
employee in Thousands, $ in Millions
3 Months Ended
Mar. 29, 2024
USD ($)
employee
segment
Mar. 31, 2023
USD ($)
Dec. 29, 2023
USD ($)
Significant Accounting Policies [Line Items]      
Number of employees in global workforce | employee 47    
Number of reportable segments | segment 4    
Revenue recognized for performance obligation satisfied in the previous periods $ (2) $ 5  
Accounts payable and accrued liabilities 2,301   $ 2,277
Restricted cash balances $ 114   151
Leidos, Inc.      
Significant Accounting Policies [Line Items]      
Controlling ownership interest (as percent) 100.00%    
Cash and Cash Equivalents      
Significant Accounting Policies [Line Items]      
Accounts payable and accrued liabilities $ 86   $ 136