Shareholders' Equity - Summary (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Aug. 02, 2019	Jul. 31, 2020	Aug. 02, 2019
Share Repurchases
Reduction in retained earnings		$ 1,900	$ 927	$ 2,700
Share repurchase program
Share Repurchases
Share repurchases (in shares)	0.0	19.6	9.5	27.6
Share repurchases, cost	$ 0	$ 1,964	$ 940	$ 2,783
Shares withheld from employees
Share Repurchases
Share repurchases (in shares)			0.1	0.1
Share repurchases, cost			$ 7	$ 13
Shares Repurchase Program And Shares Repurchased From Employees
Share Repurchases
Share repurchases (in shares)	0.0	19.6	9.6	27.7
Share repurchases, cost	$ 0	$ 1,964	$ 947	$ 2,796