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Weighted-Average Assumptions used to Determine Benefit Obligations and Net Periodic Postretirement Cost (Detail) - Postretirement Benefits | 12 Months Ended
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May 31, 2023 | May 31, 2022 | May 31, 2021
Domestic |  |  |
Health Care Cost Trend Rates Assumptions [Line Items] |  |  |
Year-End Benefit Obligations, Discount rate | 5.20% | 4.36% |
Year-End Benefit Obligations, Current healthcare cost trend rate | 6.00% | 6.23% |
Year-End Benefit Obligations, Ultimate healthcare cost trend rate | 4.03% | 4.03% |
Year-End Benefit Obligation, Year ultimate healthcare cost trend rate will be realized | 2045 | 2045 |
Net Periodic Postretirement Cost, Discount rate | 4.36% | 2.47% | 2.44%
Net Periodic Postretirement Cost, Current healthcare cost trend rate | 6.23% | 6.07% | 6.68%
Net Periodic Postretirement Cost, Ultimate healthcare cost trend rate | 4.03% | 4.36% | 4.36%
Net Periodic Postretirement Cost, Year ultimate healthcare cost trend rate will be realized | 2045 | 2037 | 2037
Non-U.S. Plans |  |  |
Health Care Cost Trend Rates Assumptions [Line Items] |  |  |
Year-End Benefit Obligations, Discount rate | 5.10% | 5.13% |
Year-End Benefit Obligations, Current healthcare cost trend rate | 5.53% | 5.58% |
Year-End Benefit Obligations, Ultimate healthcare cost trend rate | 3.70% | 3.70% |
Year-End Benefit Obligation, Year ultimate healthcare cost trend rate will be realized | 2040 | 2040 |
Net Periodic Postretirement Cost, Discount rate | 5.13% | 3.51% | 3.32%
Net Periodic Postretirement Cost, Current healthcare cost trend rate | 5.58% | 5.68% | 5.73%
Net Periodic Postretirement Cost, Ultimate healthcare cost trend rate | 3.70% | 3.70% | 3.70%
Net Periodic Postretirement Cost, Year ultimate healthcare cost trend rate will be realized | 2040 | 2040 | 2040

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- Definition Defined benefit plan year ultimate healthcare realized cost trend rate. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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