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Benefit Plans - Expected Future Retiree Benefit Payments (Details) $ in Thousands | Aug. 31, 2021 USD ($)
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Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2022 | $ 70,100
2023 | 70,900
2024 | 70,300
2025 | 71,400
2026 | 73,900
2027-2031 | 342,700
Non-Qualified Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2022 | 2,220
2023 | 2,490
2024 | 2,210
2025 | 2,110
2026 | 2,100
2027-2031 | 7,930
Other Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2022 | 1,970
2023 | 2,260
2024 | 2,340
2025 | 2,340
2026 | 2,290
2027-2031 | $ 8,920
Fixed Income Securities | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Defined benefit plan, target allocation percentage | 45.00%
Fixed Income Securities | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Defined benefit plan, target allocation percentage | 80.00%
Equity Securities | Minimum |
Defined Benefit Plan Disclosure [Line Items] |
Defined benefit plan, target allocation percentage | 20.00%
Equity Securities | Maximum |
Defined Benefit Plan Disclosure [Line Items] |
Defined benefit plan, target allocation percentage | 55.00%

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