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Employee Benefit Plans - Schedule of recognized in accumulated other comprehensive loss (Details) - USD ($) | May 31, 2025 | May 31, 2024
--- | --- | ---
Pension and postretirement adjustments: |  |
Actuarial gain (loss) | $ (9,600,000) | $ (10,300,000)
Prior service credit (cost) | 5,900,000 | 6,700,000
Amount recognized in Accumulated comprehensive income (loss) net of tax | (5,500,000) | (5,600,000)
U.K. | Pension Plans |  |
Pension and postretirement adjustments: |  |
Actuarial gain (loss) | (11,000,000.0) | (11,800,000)
Prior service credit (cost) | 0.0 | 0.0
Amount recognized in Accumulated comprehensive income (loss) net of tax | (11,000,000.0) | (11,800,000)
United States | Other Postretirement Benefits |  |
Pension and postretirement adjustments: |  |
Actuarial gain (loss) | 1,400,000 | 1,500,000
Prior service credit (cost) | 5,900,000 | 6,700,000
Amount recognized in Accumulated comprehensive income (loss) net of tax | $ 5,500,000 | $ 6,200,000

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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