Stock-Based Compensation (Summary Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit		$ 17	$ 15	$ 50	$ 55
Income tax benefit		(6)	(4)	(19)	(14)
Total stock-based compensation expense, net of income tax benefit		11	11	31	41
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit		13	11	42	39
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit		4	2	8	9
Other [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense, before income tax benefit	[1]	$ 0	$ 2	$ 0	$ 7

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