Earnings (Loss) Per Share (EPS) (Reconciliation of Income used in Calculating Earnings per Share) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Nov. 01, 2013	Oct. 31, 2014	Nov. 01, 2013
Basic EPS:
Income (loss) from continuing operations, as reported	$ 38	$ (8)	$ (356)	$ 37
Less: allocation of distributed and undistributed earnings to participating securities	0	0	0	(3)
Income (loss) from continuing operations, for computing basic EPS	38	(8)	(356)	34
Net income, as reported	34	(3)	(367)	120
Net income, for computing basic EPS	34	(3)	(367)	117
Diluted EPS:
Income (loss) from continuing operations, as reported	38	(8)	(356)	37
Less: allocation of distributed and undistributed earnings to participating securities	0	0	0	(3)
Income (loss) from continuing operations, for computing diluted EPS	38	(8)	(356)	34
Net income, as reported	34	(3)	(367)	120
Net income, for computing diluted EPS	$ 34	$ (3)	$ (367)	$ 117