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v3.25.2

Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2025 | May 31, 2024 | May 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other components of net periodic benefit (cost) | $ 1.1 | $ 1.0 | $ (0.3)
Tax (benefit) expense | 0.6 | 4.1 | 25.9
Net income (loss) | (1.9) | 12.1 | 86.5
Pension Plans | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net income (loss) | 1.4 | 1.3 | 0.5
Postretirement Benefits | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net income (loss) | (0.7) | (0.6) | (0.6)
Amortization of prior service (credit) loss | Pension Plans | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other components of net periodic benefit (cost) | 0.0 | 0.0 | 0.0
Amortization of prior service (credit) loss | Postretirement Benefits | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other components of net periodic benefit (cost) | (0.8) | (0.8) | (0.8)
Amortization of net actuarial loss (gain) | Pension Plans | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other components of net periodic benefit (cost) | 1.4 | 1.3 | 0.5
Amortization of net actuarial loss (gain) | Postretirement Benefits | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other components of net periodic benefit (cost) | (0.1) | 0.0 | 0.0
Tax (benefit) expense | Pension Plans | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax (benefit) expense | 0.0 | 0.0 | 0.0
Tax (benefit) expense | Postretirement Benefits | Amount reclassified from Accumulated other comprehensive income (loss) |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax (benefit) expense | $ 0.2 | $ 0.2 | $ 0.2

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