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Summary of Significant Accounting Policies - Antidilutive Shares (Details) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Accounting Policies [Abstract]
Antidilutive securities excluded from computation of EPS (in shares)	7.6	5.2	6.2

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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