Earnings Per Share (Computation of Basic and Diluted 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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income/(loss)	$ 430	$ 45	$ 632	$ (65)
Weighted-average common shares outstanding	103.8	104.5	103.7	104.4
Dilutive effect of potential common shares	1.4	0.6	1.4
Weighted-average common shares outstanding assuming dilution	105.2	105.1	105.1	104.4
Earnings per share - basic	$ 4.14	$ 0.43	$ 6.10	$ (0.62)
Earnings per share - diluted	$ 4.09	$ 0.43	$ 6.02	$ (0.62)
Stock Option Plans [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive share-based awards excluded from diluted calculation	1.5	2.7	1.7	2.7