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Debt (Schedule Of Debt) (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
May 30, 2020 | Aug. 31, 2019
Debt Instrument [Line Items] |  |  |
Financing arrangements |  | $ 437,000 | $ 82,000
Less: unamortized debt issuance costs |  | (954,000) | (1,169,000)
Total debt, excluding obligations under finance leases |  | 973,683,000 | 438,913,000
Less: current portion | [1] | (309,229,000) | (174,688,000)
Total long-term debt, excluding obligations under finance leases |  | 664,454,000 | 264,225,000
Committed Bank Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility |  | $ 588,000,000 |
Maturity date |  | Apr. 14, 2022 |
Uncommitted Bank Facilities [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility |  | $ 1,200,000 | 155,000,000
Senior Notes Series A [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount |  | $ 75,000,000 | 75,000,000
Interest rate |  | 2.65% |
Maturity date |  | Jul. 28, 2023 |
Senior Notes Series B [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount |  | $ 100,000,000 | 100,000,000
Interest rate |  | 2.90% |
Maturity date |  | Jul. 28, 2026 |
Senior Notes Due June 11, 2025 [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount |  | $ 20,000,000 | 20,000,000
Interest rate |  | 3.79% |
Maturity date |  | Jun. 11, 2025 |
Senior notes, due March 5, 2027 [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount |  | $ 50,000,000 |
Interest rate |  | 2.60% |
Maturity date |  | Mar. 05, 2027 |
Senior notes due January 12, 2023 [MEmber] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount | [2] | $ 50,000,000 | 50,000,000
Interest rate |  | 3.04% |
Maturity date |  | Jan. 12, 2023 |
Series 2018A notes, due June 11, 2020 [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount | [2] | $ 20,000,000 | 20,000,000
Interest rate |  | 3.22% |
Maturity date |  | Jun. 11, 2020 |
Series 2018B notes, due June 11, 2021 [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount | [2] | $ 20,000,000 | $ 20,000,000
Interest rate |  | 3.42% |
Maturity date |  | Jun. 11, 2021 |
Series 2019A notes, due March 5, 2024 [Member] | Private Placement Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount | [2] | $ 50,000,000 |
Interest rate |  | 2.40% |
Maturity date |  | Mar. 05, 2024 |
[1] | Net of unamortized debt issuance costs expected to be amortized in the next twelve months.(2)Represents private placement debt issued under
[2] | Represents private placement debt issued under Shelf Facility Agreements, discussed in further detail below.

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