Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended
	Feb. 28, 2013	Mar. 01, 2012	Feb. 28, 2013	Mar. 01, 2012	Feb. 28, 2013 Tax Benefits Resulting From Favorable Resolution Of Prior Period Tax Positions [Member]	Dec. 01, 2011 Tax Benefits Resulting From Favorable Resolution Of Prior Period Tax Positions [Member]	Feb. 28, 2013 Tax Benefits Resulting From Favorable Change in Tax Law [Member]
Current [Abstract]
Income tax (provision) benefit	$ 9	$ (9)	$ (4)	$ (7)	$ 10	$ 14	$ 9