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EMPLOYEE BENEFIT PLANS AND OTHER POST-RETIREMENT BENEFITS - Funding and Cash Flows - Estimated Benefit Payments (Details)
$ in Millions
May 31, 2020
USD ($)
Pension Plans  
Estimated benefit payments  
2021 $ 0.4
2022 0.6
2023 0.8
2024 0.9
2025 1.1
2026-2030 8.5
Post-Retirement Plan  
Estimated benefit payments  
2021 0.2
2022 0.2
2023 0.3
2024 0.3
2025 0.4
2026-2030 $ 2.1