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Schedule of Stock-Based Awards Excluded from Weighted Average Shares Outstanding (Detail) In Millions, unless otherwise specified	12 Months Ended
	Jan. 30, 2015	Jan. 31, 2014	Jan. 31, 2013
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock based awards	4	5	5
Outstanding Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock based awards	3	3	0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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