Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Numerator
Net earnings from continuing operations	$ 192	$ 129	$ 600	$ 330
Denominator
Weighted-average common shares outstanding (in shares)	316.2	344.7	320.2	348.9
Effect of potentially dilutive securities:
Nonvested share awards (in shares)	3.8	4.3	3.4	4.7
Weighted-average common shares outstanding, assuming dilution (in shares)	320.0	349.0	323.6	353.6
Net earnings per share from continuing operations
Basic (in dollars per share)	$ 0.61	$ 0.37	$ 1.87	$ 0.95
Diluted (in dollars per share)	$ 0.60	$ 0.37	$ 1.85	$ 0.93
Antidilutive securities excluded from computation of earnings per share	6.3	10.1	6.9	10.0