Investments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Mar. 01, 2012	Feb. 28, 2013	Aug. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 2,486		$ 2,486	$ 2,693
Gross Unrealized Gains	1		1	1
Gross Unrealized Losses	(1)		(1)	0
Fair Value	2,486		2,486	2,694
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]
Money market funds not due at a single maturity date	1,634		1,634
Due in 1 year or less	306		306
Due in 1-2 years	228		228
Due in 2-4 years	277		277
Due after 4 years	31		31
Debt Maturities, Amortized Cost Basis	2,476		2,476
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Money market funds not due at a single maturity date	1,634		1,634
Due in 1 year or less	306		306
Due in 1-2 years	228		228
Due in 2-4 years	278		278
Due after 4 years	31		31
Debt Securities, Fair Value	2,477		2,477
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]
Net unrealized holding gains (losses) reclassified out of accumulated other comprehensive income		34
Proceeds from the sale of available-for-sale securities	67	41	160
Gross realized gains from sale of available-for-sale securities		34
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,634		1,634	2,159
Gross Unrealized Gains	0		0	0
Gross Unrealized Losses	0		0	0
Fair Value	1,634		1,634	2,159
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	360		360	233
Gross Unrealized Gains	1		1	1
Gross Unrealized Losses	0		0	0
Fair Value	361		361	234
Government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	220		220	144
Gross Unrealized Gains	0		0	0
Gross Unrealized Losses	0		0	0
Fair Value	220		220	144
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	111		111	77
Gross Unrealized Gains	0		0	0
Gross Unrealized Losses	0		0	0
Fair Value	111		111	77
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	93		93	31
Gross Unrealized Gains	0		0	0
Gross Unrealized Losses	0		0	0
Fair Value	93		93	31
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	58		58	39
Gross Unrealized Gains	0		0	0
Gross Unrealized Losses	0		0	0
Fair Value	58		58	39
Marketable equity securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10		10	10
Gross Unrealized Gains	0		0	0
Gross Unrealized Losses	(1)		(1)	0
Fair Value	$ 9		$ 9	$ 10