Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2022	May 01, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income/(loss)	$ 133	$ 202
Weighted-average common shares outstanding	96.1	103.6
Dilutive effect of potential common shares	1.1	1.4
Weighted-average common shares outstanding assuming dilution	97.2	105.0
Earnings per share - basic	$ 1.38	$ 1.95
Earnings per share - diluted	$ 1.37	$ 1.93
Stock Option Plans [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive share-based awards excluded from diluted calculation	2.5	1.7