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Benefit Plans - Schedule of Pension Plans' Fair Value Measurements (Details) - USD ($) $ in Thousands | Aug. 31, 2024 | Aug. 31, 2023
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | $ 781,412 | $ 736,150
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 12,416 | 12,505
Equity Securities: Common/collective trust [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 156,462 | 127,225
Fixed Income Securities: Common/collective trust [Member] [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 464,611 | 425,180
Partnership and joint venture interests |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 22,862 | 59,782
Other Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 125,061 | 111,458
Fair Value, Inputs, Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 3 | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 3 | Equity Securities: Common/collective trust [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 3 | Fixed Income Securities: Common/collective trust [Member] [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 3 | Partnership and joint venture interests |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 3 | Other Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 43,714 | 37,648
Fair Value, Inputs, Level 1 | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 12,416 | 12,505
Fair Value, Inputs, Level 1 | Equity Securities: Common/collective trust [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 1 | Fixed Income Securities: Common/collective trust [Member] [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 1 | Partnership and joint venture interests |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 1 | Other Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 31,298 | 25,143
Fair Value, Inputs, Level 2 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 93,763 | 86,315
Fair Value, Inputs, Level 2 | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 2 | Equity Securities: Common/collective trust [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 2 | Fixed Income Securities: Common/collective trust [Member] [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 2 | Partnership and joint venture interests |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | 0 | 0
Fair Value, Inputs, Level 2 | Other Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension plans assets, fair value | $ 93,763 | $ 86,315

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