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Accumulated Other Comprehensive Loss
9 Months Ended
Oct. 31, 2020
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)
February 1, 2020$(12)$(19)$(837)$(868)
Other comprehensive loss before reclassifications, net of tax(1)— — (1)
Amounts reclassified from AOCI, net of tax— 66 72 
October 31, 2020$(7)$(19)$(771)$(797)