Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Feb. 01, 2015	Jan. 26, 2014	Feb. 01, 2015	Jan. 26, 2014	Aug. 03, 2014
Reclassification of currency translation adjustments realized upon disposal of business, before tax	$ 0	$ (22)	$ 0	$ (22)	$ (22)
Reclassification of currency translation adjustments realized upon disposal of business, after tax	$ 0	$ (19)	$ 0	$ (19)	$ (19)

Amount before tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

+ References+ Details