Earnings Per Share (Computation Of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ (91)	$ 2	$ (4,104)	$ 224
Net Income (Loss) Available to Common Stockholders, Basic	(91)	2	(4,104)	224
Net Income (Loss) Available to Common Stockholders, Diluted	$ (91)	$ 2	$ (4,104)	$ 224
Basic earnings (loss) per share	$ (0.29)	$ 0.01	$ (13.20)	$ 0.72
Diluted earnings (loss) per share	$ (0.29)	$ 0.01	$ (13.20)	$ 0.72
Weighted Average Number of Shares Issued, Basic	310.2	308.9	310.1	308.7
Shares to be issued under deferred compensation and other plans	1.0	1.0	0.9	0.9
Average number of shares outstanding, basic	311.2	309.9	311.0	309.6
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0.0	1.1	0.0	1.7
Average number of shares outstanding, diluted	311.2	311.0	311.0	311.3