Fair Value Measurements (Details) (Measured on Recurring Basis [Member], USD $) In Millions	May 01, 2011		Aug. 01, 2010
Total assets at fair value	$ 45		$ 69
Total liabilities at fair value	296		192
Foreign Exchange Contracts [Member]
Total assets at fair value	1	[1]	2	[1]
Total liabilities at fair value	12	[1]	2	[1]
Foreign Exchange Contracts [Member] | Level 1 [Member]
Total assets at fair value		[1]		[1]
Total liabilities at fair value		[1]		[1]
Foreign Exchange Contracts [Member] | Level 2 [Member]
Total assets at fair value	1	[1]	2	[1]
Total liabilities at fair value	12	[1]	2	[1]
Foreign Exchange Contracts [Member] | Level 3 [Member]
Total assets at fair value		[1]		[1]
Total liabilities at fair value		[1]		[1]
Equity Contracts [Member]
Total assets at fair value	1	[2]		[2]
Total liabilities at fair value		[2]	2	[2]
Equity Contracts [Member] | Level 1 [Member]
Total assets at fair value		[2]		[2]
Total liabilities at fair value		[2]		[2]
Equity Contracts [Member] | Level 2 [Member]
Total assets at fair value	1	[2]		[2]
Total liabilities at fair value		[2]	2	[2]
Equity Contracts [Member] | Level 3 [Member]
Total assets at fair value		[2]		[2]
Total liabilities at fair value		[2]		[2]
Commodity Derivative Contracts [Member]
Total assets at fair value	8	[3]	4	[3]
Total liabilities at fair value		[3]	1	[3]
Commodity Derivative Contracts [Member] | Level 1 [Member]
Total assets at fair value	8	[3]	4	[3]
Total liabilities at fair value		[3]	1	[3]
Commodity Derivative Contracts [Member] | Level 2 [Member]
Total assets at fair value		[3]		[3]
Total liabilities at fair value		[3]		[3]
Commodity Derivative Contracts [Member] | Level 3 [Member]
Total assets at fair value		[3]		[3]
Total liabilities at fair value		[3]		[3]
Cross-currency Swap Contracts [Member]
Total assets at fair value		[4]	17	[4]
Total liabilities at fair value	138	[4]	38	[4]
Cross-currency Swap Contracts [Member] | Level 1 [Member]
Total assets at fair value		[4]		[4]
Total liabilities at fair value		[4]		[4]
Cross-currency Swap Contracts [Member] | Level 2 [Member]
Total assets at fair value		[4]	17	[4]
Total liabilities at fair value	138	[4]	38	[4]
Cross-currency Swap Contracts [Member] | Level 3 [Member]
Total assets at fair value		[4]		[4]
Total liabilities at fair value		[4]		[4]
Level 1 [Member]
Total assets at fair value	8		4
Total liabilities at fair value	99		96
Level 1 [Member] | Interest Rate Swaps [Member]
Total assets at fair value		[5]		[5]
Level 1 [Member] | Deferred Compensation Obligation [Member]
Total liabilities at fair value	99	[6]	95	[6]
Level 2 [Member]
Total assets at fair value	37		65
Total liabilities at fair value	197		96
Level 2 [Member] | Interest Rate Swaps [Member]
Total assets at fair value	35	[5]	46	[5]
Level 2 [Member] | Deferred Compensation Obligation [Member]
Total liabilities at fair value	47	[6]	54	[6]
Level 3 [Member]
Total assets at fair value
Total liabilities at fair value
Level 3 [Member] | Interest Rate Swaps [Member]
Total assets at fair value		[5]		[5]
Level 3 [Member] | Deferred Compensation Obligation [Member]
Total liabilities at fair value		[6]		[6]
Interest Rate Swaps [Member]
Total assets at fair value	35	[5]	46	[5]
Deferred Compensation Obligation [Member]
Total liabilities at fair value	$ 146	[6]	$ 149	[6]

[1] Based on observable market transactions of spot currency rates and forward rates.

[2] Based on LIBOR and equity index swap rates.

[3] Based on quoted futures exchanges.

[4] Based on observable local benchmarks for currency and interest rates.

[5] Based on LIBOR swap rates.

[6] Based on the fair value of the participants' investments.