Debt (Carrying Value and Estimated Fair Value of Company's Long Term Debt) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2014	Sep. 01, 2013
Debt Instrument [Line Items]
Total long-term debt, carrying value	$ 5,093
Long-term debt, excluding current portion, carrying value	5,093	4,998
Long-term debt, excluding current portion, fair value	5,217	5,082
5.5% Senior Notes due March 2017
Debt Instrument [Line Items]
Debt instrument, principal due date	2017-03
Debt instrument, stated interest rate (percent)	5.50%
Total long-term debt, carrying value	1,099	1,098
Total long-term debt, fair value	1,223	1,248
0.65% Senior Notes due December 2015
Debt Instrument [Line Items]
Debt instrument, principal due date	2015-12
Debt instrument, stated interest rate (percent)	0.65%
Total long-term debt, carrying value	1,199	1,199
Total long-term debt, fair value	1,203	1,200
Senior Notes One Point One Two Five Percent Due December Fifteen Twenty Seventeen [Member]
Debt Instrument [Line Items]
Debt instrument, principal due date	2017-12
Debt instrument, stated interest rate (percent)	1.125%
Total long-term debt, carrying value	1,100	1,100
Total long-term debt, fair value	1,095	1,065
Senior Notes One Point Seven Percent Due December Twenty Nineteen [Member]
Debt Instrument [Line Items]
Debt instrument, principal due date	2019-12
Debt instrument, stated interest rate (percent)	1.70%
Total long-term debt, carrying value	1,198	1,198
Total long-term debt, fair value	1,186	1,157
Other Long Term Debt
Debt Instrument [Line Items]
Total long-term debt, carrying value	497	403
Total long-term debt, fair value	$ 510	$ 412