Carrying Value and Estimated Fair Value of Company's Long-Term Debt (Detail) (USD $) In Millions, unless otherwise specified	May 06, 2012	Aug. 28, 2011
Debt Instrument [Line Items]
Long-term debt, carrying value	$ 1,373	$ 2,153
Less current portion	0	900
Long-term debt, excluding current portion, carrying value	1,373	1,253
Long-term debt, fair value	1,652	2,435
Less current portion	0	924
Long-term debt, excluding current portion, fair value	1,652	1,511
5.5% Senior Notes due March 2017
Debt Instrument [Line Items]
Long-term debt, carrying value	1,097	1,097
Long-term debt, fair value	1,324	1,314
5.3% Senior Notes due March 2012
Debt Instrument [Line Items]
Long-term debt, carrying value	0	900
Long-term debt, fair value	0	924
2.695% Promissory Notes Due October 2017
Debt Instrument [Line Items]
Long-term debt, carrying value	81	85
Long-term debt, fair value	90	94
1.18% Promissory Notes Due October 2018
Debt Instrument [Line Items]
Long-term debt, carrying value	125	0
Long-term debt, fair value	128	0
Other Long Term Debt
Debt Instrument [Line Items]
Long-term debt, carrying value	70	71
Long-term debt, fair value	$ 110	$ 103