Financing - Schedule of Debt (Detail) - USD ($) $ in Thousands	Feb. 11, 2017	Aug. 27, 2016
Debt Instrument [Line Items]
Commercial paper	$ 1,823,100	$ 1,197,500
Total debt before discounts and debt issuance costs	5,173,100	4,947,500
Less: Discounts and debt issuance costs	21,238	23,381
Long-term debt	5,151,862	4,924,119
1.300% Senior Notes due January 2017, effective interest rate of 1.43% [Member]
Debt Instrument [Line Items]
Senior notes		400,000
7.125% Senior Notes due August 2018, effective interest rate of 7.28% [Member]
Debt Instrument [Line Items]
Senior notes	250,000	250,000
1.625% Senior Notes due April 2019, effective interest rate of 1.77% [Member]
Debt Instrument [Line Items]
Senior notes	250,000	250,000
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member]
Debt Instrument [Line Items]
Senior notes	500,000	500,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member]
Debt Instrument [Line Items]
Senior notes	250,000	250,000
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member]
Debt Instrument [Line Items]
Senior notes	500,000	500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21% [Member]
Debt Instrument [Line Items]
Senior notes	300,000	300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26% [Member]
Debt Instrument [Line Items]
Senior notes	500,000	500,000
3.250% Senior Notes due April 2025, effective interest rate 3.36% [Member]
Debt Instrument [Line Items]
Senior notes	400,000	400,000
3.125% Senior Notes due April 2026, effective interest rate of 3.28% [Member]
Debt Instrument [Line Items]
Senior notes	$ 400,000	$ 400,000