Stock-Based Compensation (Summary Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit		$ 23	$ 20	$ 45	$ 33
Income tax benefit		(6)	(8)	(12)	(13)
Total stock-based compensation expense, net of income tax benefit		17	12	33	20
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit		14	16	28	29
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit		8	2	15	4
Other [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit	[1]	$ 1	$ 2	$ 2	$ 0

[1] Other stock-based compensation expense includes PSUs, ESPP and nonemployee director stock awards.