Earnings Per Share (Computation Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Earnings Per Share [Abstract]
Net earnings (loss)	$ 80	$ (255)	$ (86)	$ (776)
Basic shares (in shares)	159.0	157.2	158.7	156.8
Dilutive effect of common stock equivalents (in shares)	3.8	0.0	0.0	0.0
Diluted shares (in shares)	162.8	157.2	158.7	156.8
Earnings (loss) per basic share (in dollars per share)	$ 0.50	$ (1.62)	$ (0.54)	$ (4.95)
Earnings (loss) per diluted share (in dollars per share)	$ 0.49	$ (1.62)	$ (0.54)	$ (4.95)
Anti-dilutive common stock equivalents (in shares)	7.5	14.4	12.0	13.7