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Postretirement Benefits - Additional Information (Detail) $ in Millions | May 31, 2025 USD ($)
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Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |
Estimated benefits payable in the first year | $ 75.3
Estimated benefits payable in the second year | 77.5
Estimated benefits payable in the third year | 81.5
Estimated benefits payable in the fourth year | 89.2
Estimated benefits payable in the fifth year | 89.1
Estimated benefits payable in the years thereafter | 448.3
Postretirement Benefits |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |
Estimated benefits payable in the years thereafter | 7.8
Minimum | Postretirement Benefits |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |
Estimated benefits payable in the first year | 1.2
Estimated benefits payable in the second year | 1.2
Estimated benefits payable in the third year | 1.2
Estimated benefits payable in the fourth year | 1.2
Estimated benefits payable in the fifth year | 1.2
Maximum | Postretirement Benefits |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |
Estimated benefits payable in the first year | 1.7
Estimated benefits payable in the second year | 1.7
Estimated benefits payable in the third year | 1.7
Estimated benefits payable in the fourth year | 1.7
Estimated benefits payable in the fifth year | $ 1.7

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- Definition Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] + References No definition available. + Details
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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 + Details
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- Definition Amount of benefit for defined benefit plan expected to be paid in next 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 + Details
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