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Postretirement and Other Employee Benefits (Estimated Future Benefit Payments) (Details) $ in Thousands | Aug. 31, 2019 USD ($)
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Fiscal Year Ended August 31, |
2020 | $ 5,017
2021 | 4,788
2022 | 5,365
2023 | 5,877
2024 | 6,274
2025 through 2029 | $ 40,828

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