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Financing - Additional Information (Detail) - USD ($) | 6 Months Ended |
--- | --- | ---
Feb. 15, 2020 | Aug. 31, 2019
Debt Instrument [Line Items] |  |
Remaining borrowing capacity under revolving credit facility | $ 1,997,000,000 |
Amount available under credit facility | $ 2,000,000,000 |
Extended expiration of credit facility | 1 year |
Fair value of the Company's debt | $ 5,678,000,000 | $ 5,419,000,000
Excess (shortfall) of fair value of debt over (from) carrying value | 226,600,000 | 212,700,000
Third Amended and Restated Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Amount available under credit facility | 1,600,000,000 |
Master Extension Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Amount available under credit facility | 2,000,000,000 |
Revolving credit agreement, available additional borrowing capacity | 400,000,000 |
Maximum amount available under credit facility | $ 2,400,000,000 |
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. As of February 15, 2020, the Company had $3.2 million of outstanding letters of credit under the Revolving Credit Agreement. |
Letters of credit, outstanding | $ 3,200,000 |
Revolving Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Remaining borrowing capacity under revolving credit facility | 2,000,000,000 |
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 500,000,000 | $ 500,000,000
Stated interest rate percentage | 4.00% | 4.00%

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