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Financing - Additional Information (Detail) - USD ($) $ in Thousands | May 09, 2020 | Apr. 03, 2020 | Aug. 31, 2019 | Nov. 18, 2017 | Nov. 17, 2017
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Remaining borrowing capacity under revolving credit facility | $ 2,747,000 |  |  |  |
Amount available under credit facility | 2,750,000 |  |  |  |
Maximum amount available under credit facility |  | $ 750,000 |  |  |
Fair value of the Company's debt | 5,723,000 |  | $ 5,419,000 |  |
Excess (shortfall) of fair value of debt over (from) carrying value | 304,900 |  | 212,700 |  |
Third Amended and Restated Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount available under credit facility |  |  |  |  | $ 1,600,000
Master Extension Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount available under credit facility |  |  |  | $ 2,000,000 |
Revolving credit agreement, available additional borrowing capacity | 400,000 |  |  |  |
Maximum amount available under credit facility | 2,400,000 |  |  |  |
Letters of credit, outstanding | 3,200 |  |  |  |
Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Remaining borrowing capacity under revolving credit facility | 2,000,000 |  |  |  |
4.000% Senior Notes due November 2020, effective interest rate of 4.43% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 500,000 |  | $ 500,000 |  |
Stated interest rate percentage | 4.00% |  | 4.00% |  |
2.500% Senior Notes due April 2021, effective interest rate of 2.62% |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 250,000 |  | $ 250,000 |  |
Stated interest rate percentage | 2.50% |  | 2.50% |  |

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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