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
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income/(loss)	$ 265	$ 125	$ 200	$ 357
Weighted-average common shares outstanding	104.4	106.9	104.4	110.0
Dilutive effect of potential common shares	0.9	0.3	0.7	0.5
Weighted-average common shares outstanding assuming dilution	105.3	107.2	105.1	110.5
Earnings per share - basic	$ 2.54	$ 1.16	$ 1.92	$ 3.24
Earnings per share - diluted	$ 2.52	$ 1.16	$ 1.91	$ 3.23
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	2.4	2.7	2.2