Comprehensive Income (Loss) (Details) (USD $) In Millions	3 Months Ended			9 Months Ended
	May 01, 2011		May 02, 2010	May 01, 2011		May 02, 2010	Aug. 01, 2010
Comprehensive Income (Loss)
Total comprehensive income (loss)	$ 348		$ 203	$ 1,007		$ 829
Foreign currency translation adjustments, net of tax	410	[1]		410	[1]		132	[1]
Cash-flow hedges, net of tax	(21)	[2]		(21)	[2]		(18)	[2]
Net actuarial loss	(828)	[3]		(828)	[3]		(856)	[3]
Prior service (cost)/credit	6	[3]		6	[3]		6	[3]
Total Accumulated other comprehensive loss	(433)			(433)			(736)
Foreign currency translation tax benefit (expense)	(6)			(6)			1
Cash flow hedges tax benefit (expense)	11			11			10
Unamortized pension and postretirement, tax benefit (expense)	$ 472			$ 472			$ 489

[1] Includes a tax expense of $6 as of May 1, 2011, and a tax benefit of $1 as of August 1, 2010.

[2] Includes a tax benefit of $11 as of May 1, 2011, and $10 as of August 1, 2010.

[3] Includes a tax benefit of $472 as of May 1, 2011, and $489 as of August 1, 2010.