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Accumulated Other Comprehensive Loss
6 Months Ended
Jul. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss 
Change in Accumulated Other Comprehensive LossCash Flow
Hedges
Currency Translation AdjustmentPensionTotal
(millions)
January 30, 2021$(3)$(18)$(735)$(756)
Other comprehensive income before reclassifications, net of tax— — 
Amounts reclassified from AOCI, net of tax— — 42 42 
July 31, 2021$(2)$(18)$(693)$(713)