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Employee Benefit Plans - Schedule of targeted weighted average asset allocations (Details) - U.K. - Pension Plans | May 31, 2023 | May 31, 2022
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Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Weighted average asset allocations | 100.00% | 100.00%
Targeted asset allocation | 100.00% |
Equity securities |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Weighted average asset allocations | 29.60% | 56.10%
Targeted asset allocation | 30.00% |
Cash and cash equivalents |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Weighted average asset allocations | 5.10% | 1.10%
Targeted asset allocation | 5.00% |
Liability-driven instruments |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Weighted average asset allocations | 41.70% | 23.20%
Targeted asset allocation | 42.00% |
Real estate |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Weighted average asset allocations | 6.80% | 5.70%
Targeted asset allocation | 7.00% |
Other |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Weighted average asset allocations | 16.80% | 13.90%
Targeted asset allocation | 16.00% |

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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