Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
May 03, 2015	Apr. 27, 2014	Aug. 03, 2014
Reclassification of currency translation adjustments realized upon disposal of business, before tax	$ 0	$ (22)	$ (22)
Reclassification of currency translation adjustments realized upon disposal of business, after tax	$ 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.

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