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Exit Activities Exit Activities - Lease Obligations (Details) - Lease obligation costs for closed locations - USD ($)
$ in Millions
12 Months Ended
Jan. 31, 2020
Feb. 01, 2019
Restructuring Reserve [Roll Forward]    
Accrual for exit activities, beginning balance $ 361 $ 60
ASU 2016-02 adoption impact (168)  
Additions to the accrual - net   365
Cash payments (43) (86)
Adjustments (62) 22
Accrual for exit activities, ending balance $ 88 $ 361