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Postretirement and Other Employee Benefits (Estimated Future Benefit Payments) (Details)
$ in Thousands
Aug. 31, 2020
USD ($)
Fiscal Year Ended August 31,  
2021 $ 36,361
2022 28,541
2023 27,958
2024 27,531
2025 28,942
2026 through 2030 $ 137,521