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Restructuring and Impairment - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 29, 2021
Jan. 31, 2020
Feb. 01, 2019
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Expected Cost Remaining $ 4    
Severance Costs 4 $ 0 $ 0
Integration of Engility      
Restructuring Cost and Reserve [Line Items]      
Restructuring and Related Cost, Incurred Cost   52  
Severance Costs   40  
Restructuring and Related Cost, Expected Cost   1  
Other Restructuring Costs   12  
Employee Severance | Integration of Engility      
Restructuring Cost and Reserve [Line Items]      
Payments for Restructuring 3 12 $ 25
Other Restructuring | Integration of Engility      
Restructuring Cost and Reserve [Line Items]      
Payments for Restructuring $ 4 $ 7