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Retirement Plans - Schedule of Expected Future Benefit Payments (Details) $ in Millions | May 31, 2020 USD ($)
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Pension Plans [Member] | U.S. Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2021 | $ 1,008
2022 | 1,093
2023 | 1,154
2024 | 1,242
2025 | 1,331
2026-2030 | 7,967
Pension Plans [Member] | International Pension Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2021 | 50
2022 | 46
2023 | 51
2024 | 57
2025 | 62
2026-2030 | 414
Postretirement Healthcare Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2021 | 104
2022 | 113
2023 | 121
2024 | 126
2025 | 120
2026-2030 | $ 433

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