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
	Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income/(loss)	$ 45	$ 60	$ (65)	$ 232
Weighted-average common shares outstanding	104.5	110.8	104.4	111.6
Dilutive effect of potential common shares	0.6	0.3		0.5
Weighted-average common shares outstanding assuming dilution	105.1	111.1	104.4	112.1
Earnings per share - basic	$ 0.43	$ 0.55	$ (0.62)	$ 2.09
Earnings per share - diluted	$ 0.43	$ 0.55	$ (0.62)	$ 2.08
Stock Option Plans [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive share-based awards excluded from diluted calculation	2.7	2.4	2.7	1.8