Components of Company's of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 17, 2012	Nov. 13, 2012	Aug. 25, 2012
Debt Instrument [Line Items]
Long-term debt	$ 3,802,705		3,718,302
5.875% Senior Notes due October 2012, effective interest rate of 6.33% [Member]
Debt Instrument [Line Items]
Long-term debt			300,000
Stated interest rate percentage	5.875%		5.875%
Effective interest rate	6.33%		6.33%
Debt instrument, due date	October 2012		October 2012
4.375% Senior Notes due June 2013, effective interest rate of 5.65% [Member]
Debt Instrument [Line Items]
Long-term debt	200,000		200,000
Stated interest rate percentage	4.375%		4.375%
Effective interest rate	5.65%		5.65%
Debt instrument, due date	June 2013		June 2013
6.500% Senior Notes due January 2014, effective interest rate of 6.63% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000		500,000
Stated interest rate percentage	6.50%		6.50%
Effective interest rate	6.63%		6.63%
Debt instrument, due date	January 2014		January 2014
5.750% Senior Notes due January 2015, effective interest rate of 5.89% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000		500,000
Stated interest rate percentage	5.75%		5.75%
Effective interest rate	5.89%		5.89%
Debt instrument, due date	January 2015		January 2015
5.500% Senior Notes due November 2015, effective interest rate of 4.86% [Member]
Debt Instrument [Line Items]
Long-term debt	300,000		300,000
Stated interest rate percentage	5.50%		5.50%
Effective interest rate	4.86%		4.86%
Debt instrument, due date	November 2015		November 2015
6.950% Senior Notes due June 2016, effective interest rate of 7.09% [Member]
Debt Instrument [Line Items]
Long-term debt	200,000		200,000
Stated interest rate percentage	6.95%		6.95%
Effective interest rate	7.09%		7.09%
Debt instrument, due date	June 2016		June 2016
7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member]
Debt Instrument [Line Items]
Long-term debt	250,000		250,000
Stated interest rate percentage	7.125%		7.125%
Effective interest rate	7.28%		7.28%
Debt instrument, due date	August 2018		August 2018
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000		500,000
Stated interest rate percentage	4.00%		4.00%
Effective interest rate	4.43%		4.43%
Debt instrument, due date	November 2020		November 2020
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member]
Debt Instrument [Line Items]
Long-term debt	500,000		500,000
Stated interest rate percentage	3.70%		3.70%
Effective interest rate	3.85%		3.85%
Debt instrument, due date	April 2022		April 2022
2.875% Senior Notes due January 2023, effective interest rate of 3.21%[Member]
Debt Instrument [Line Items]
Long-term debt	300,000
Stated interest rate percentage	2.875%	2.875%
Effective interest rate	3.21%		3.21%
Debt instrument, due date	January 2023		January 2023
Commercial paper, weighted average interest rate of 0.42% at November 17, 2012 and August 25, 2012 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 552,705		468,302
Weighted average interest rate of commercial paper	0.42%		0.42%