Recent Accounting Pronouncements Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions		Jul. 31, 2016	Aug. 02, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Deferred Tax Assets, Net of Valuation Allowance, Current	[1]	$ 0	$ 114

[1] In November 2015, the FASB issued guidance that requires deferred tax liabilities and assets to be classified as noncurrent in the balance sheet. We adopted the guidance in 2016 on a prospective basis and modified the presentation of deferred taxes in the Consolidated Balance Sheet as of July 31, 2016.