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Financing - Additional Information (Detail) $ in Thousands |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 28, 2021 USD ($) | Mar. 15, 2021 USD ($) | Nov. 18, 2017 USD ($) | Nov. 17, 2017 USD ($) | Aug. 28, 2021 USD ($) | Aug. 29, 2020 USD ($) | Aug. 31, 2019 USD ($) | Feb. 22, 2021 USD ($) | Aug. 14, 2020 USD ($) | Mar. 30, 2020 USD ($) | Apr. 18, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount available under credit facility | $ 2,000,000 |  |  |  | $ 2,000,000 |  |  |  |  |  |
Credit Agreement description | less than one year |  |  |  |  |  |  |  |  |  |
Minimum debt covenant interest coverage ratio to be maintained quarterly |  |  |  |  | 2.5 |  |  |  |  |  |
Debt covenant interest coverage ratio |  |  |  |  | 6.9 |  |  |  |  |  |
Remaining borrowing capacity under revolving credit facility | $ 1,998,000 |  |  |  | $ 1,998,000 |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  | 250,000 | $ 500,000 | $ 250,000 |  |  |  |
Fair value of the Company's debt | 5,683,000 |  |  |  | 5,683,000 | 6,081,000 |  |  |  |  |
Excess (shortfall) of fair value of debt over (from) carrying value | 413,100 |  |  |  | 413,100 | 567,500 |  |  |  |  |
Other Letters Of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings, outstanding | 136,800 |  |  |  | $ 136,800 |  |  |  |  |  |
Third Amended and Restated Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount available under credit facility |  |  |  | $ 1,600,000 |  |  |  |  |  |  |
Maximum amount available under credit facility |  |  |  | $ 2,000,000 |  |  |  |  |  |  |
Credit facility expiration date |  |  |  | Nov. 18, 2021 |  |  |  |  |  |  |
Master Extension Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount available under credit facility |  |  | $ 2,000,000 |  |  |  |  |  |  |  |
Maximum amount available under credit facility |  |  | $ 2,400,000 |  |  |  |  |  |  |  |
Credit facility expiration date |  |  | Nov. 18, 2022 |  |  |  |  |  |  |  |
Extended expiration of credit facility |  |  | 1 year |  |  |  |  |  |  |  |
Credit Agreement description |  |  |  |  | Under the Revolving Credit Agreement, the Company may borrow funds consisting of Eurodollar loans, base rate loans or a combination of both. Interest accrues on Eurodollar loans at a defined Eurodollar rate, defined as LIBOR plus the applicable percentage, as defined in the Revolving Credit Agreement, depending upon the Company’s senior, unsecured, (non-credit enhanced) long-term debt ratings. Interest accrues on base rate loans as defined in the Revolving Credit Agreement. |  |  |  |  |  |
Letters of credit, outstanding | 1,700 |  |  |  | $ 1,700 |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings, outstanding | 0 |  |  |  | 0 |  |  | $ 0 |  |  |
Letter of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum amount available under credit facility | 25,000 |  |  |  | 25,000 |  |  |  |  |  |
Letters of credit, outstanding | 23,900 |  |  |  | 23,900 |  |  |  |  |  |
1.650% Senior Notes due January 2031, effective interest rate of 2.19% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 600,000 |  |  |  | $ 600,000 | $ 600,000 |  |  | $ 600,000 |  |
Stated interest rate percentage | 1.65% |  |  |  | 1.65% | 1.65% |  |  | 1.65% |  |
2.500% Senior Notes due April 2021, effective interest rate of 2.62% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes |  |  |  |  |  | $ 250,000 |  |  |  |  |
Stated interest rate percentage | 2.50% | 2.50% |  |  | 2.50% | 2.50% |  |  |  |  |
Repayments of Long-term Debt |  | $ 250,000 |  |  |  |  |  |  |  |  |
3.700% Senior Notes due April 2022, effective interest rate of 3.85% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 500,000 |  |  |  | $ 500,000 | $ 500,000 |  |  |  |  |
Stated interest rate percentage | 3.70% |  |  |  | 3.70% | 3.70% |  |  |  |  |
4.000% Senior Notes due November 2020, effective interest rate of 4.43% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate percentage | 4.00% |  |  |  | 4.00% |  |  |  |  |  |
Repayment of debt |  |  |  |  | $ 500,000 |  |  |  |  |  |
3.625% Senior Notes due April 2025, effective interest rate 3.78% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 500,000 |  |  |  | $ 500,000 | $ 500,000 |  |  |  | $ 500,000 |
Stated interest rate percentage | 3.625% |  |  |  | 3.625% | 3.625% |  |  |  | 3.625% |
4.000% Senior Notes due April 2030, effective interest rate 4.09% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 750,000 |  |  |  | $ 750,000 | $ 750,000 |  |  |  | $ 750,000 |
Stated interest rate percentage | 4.00% |  |  |  | 4.00% | 4.00% |  |  |  | 4.00% |
3.125% Senior Notes due April 2024, effective interest rate 3.32% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 300,000 |  |  |  | $ 300,000 | $ 300,000 |  |  |  |  | $ 300,000
Stated interest rate percentage | 3.125% |  |  |  | 3.125% | 3.125% |  |  |  |  | 3.125%
3.750% Senior Notes due April 2029, effective interest rate of 3.86% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 450,000 |  |  |  | $ 450,000 | $ 450,000 |  |  |  |  | $ 450,000
Stated interest rate percentage | 3.75% |  |  |  | 3.75% | 3.75% |  |  |  |  | 3.75%
1.625% Senior Notes due April 2019, effective interest rate of 1.77% [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate percentage | 1.625% |  |  |  | 1.625% |  |  |  |  |  |
Repayment of debt |  |  |  |  |  |  | $ 250,000 |  |  |  |

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