Employee Benefit Plans - Schedule of expected future benefit payments (Details) $ in Millions	May 31, 2023 USD ($)
U.K. \| Pension Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	$ 1.2
2025	1.5
2026	1.4
2027	1.4
2028	1.4
2029 - 2033	7.6
U.S. \| Other Postretirement Benefits
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	1.1
2025	1.0
2026	0.9
2027	0.9
2028	0.8
2029 - 2033	3.1
Medicare subsidy receipts
2024	0.0
2025	0.0
2026	0.0
2027	0.0
2028	0.0
2029 - 2033	$ 0.1

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- Definition

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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Amount of prescription drug subsidy receipt expected after fifth fiscal year following current fiscal year.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480266/715-60-50-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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