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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Feb. 28, 2026
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following tables summarize the activity in Accumulated other comprehensive income (loss), net of tax, by component, for the periods indicated:
| Three months ended February 28, 2026
| Foreign currency translation adjustments | Retirement benefit plans | Total
Beginning balance at December 1, 2025 | $ | (36.3) |  |  | $ | (5.0) |  |  | $ | (41.3) |  |
Other comprehensive income (loss) before reclassifications |  | 7.7 |  |  |  | — |  |  |  | 7.7 |  |
Less amount reclassified from Accumulated other comprehensive income (loss): |  |  |  |  |  |  |  |  |
Amortization of net actuarial (gain) loss (net of tax of $0.0) |  | — |  |  |  | 0.4 |  |  |  | 0.4 |  |
Amortization of prior service (credit) cost (net of tax of $0.1) |  | — |  |  |  | (0.2) |  |  |  | (0.2) |  |
Other comprehensive income (loss) |  | 7.7 |  |  |  | 0.2 |  |  |  | 7.9 |  |
Ending balance at February 28, 2026 | $ | (28.6) |  |  | $ | (4.8) |  |  | $ | (33.4) |  |
| Three months ended February 28, 2025
| Foreign currency translation adjustments | Retirement benefit plans | Total
Beginning balance at December 1, 2024 | $ | (50.6) |  |  | $ | (5.2) |  |  | $ | (55.8) |  |
Other comprehensive income (loss) before reclassifications |  | (8.0) |  |  |  | — |  |  |  | (8.0) |  |
Less amount reclassified from Accumulated other comprehensive income (loss): |  |  |  |  |  |  |  |  |
Amortization of net actuarial (gain) loss (net of tax of $0.0) |  | — |  |  |  | 0.3 |  |  |  | 0.3 |  |
Amortization of prior service (credit) cost (net of tax of $0.1) |  | — |  |  |  | (0.2) |  |  |  | (0.2) |  |
Other comprehensive income (loss) |  | (8.0) |  |  |  | 0.1 |  |  |  | (7.9) |  |
Ending balance at February 28, 2025 | $ | (58.6) |  |  | $ | (5.1) |  |  | $ | (63.7) |  |
| Nine months ended February 28, 2026
| Foreign currency translation adjustments | Retirement benefit plans | Total
Beginning balance at June 1, 2025 | $ | (36.0) |  |  | $ | (5.5) |  |  | $ | (41.5) |  |
Other comprehensive income (loss) before reclassifications |  | 7.4 |  |  |  | — |  |  |  | 7.4 |  |
Less: amount reclassified from Accumulated other comprehensive income (loss) |  |  |  |  |  |  |  |  |
Amortization of net actuarial (gain) loss (net of tax of $0.0) |  | — |  |  |  | 1.2 |  |  |  | 1.2 |  |
Amortization of prior service (credit) cost (net of tax of $0.2) |  | — |  |  |  | (0.5) |  |  |  | (0.5) |  |
Other comprehensive income (loss) |  | 7.4 |  |  |  | 0.7 |  |  |  | 8.1 |  |
Ending balance at February 28, 2026 | $ | (28.6) |  |  | $ | (4.8) |  |  | $ | (33.4) |  |
| Nine months ended February 28, 2025
| Foreign currency translation adjustments | Retirement benefit plans | Total
Beginning balance at June 1, 2024 | $ | (46.9) |  |  | $ | (5.6) |  |  | $ | (52.5) |  |
Other comprehensive income (loss) before reclassifications |  | (11.7) |  |  |  | — |  |  |  | (11.7) |  |
Less: amount reclassified from Accumulated other comprehensive income (loss) |  |  |  |  |  |  |  |  |
Amortization of net actuarial (gain) loss (net of tax of $0.0) |  | — |  |  |  | 1.0 |  |  |  | 1.0 |  |
Amortization of prior service (credit) cost (net of tax of $0.2) |  | — |  |  |  | (0.5) |  |  |  | (0.5) |  |
Other comprehensive income (loss) |  | (11.7) |  |  |  | 0.5 |  |  |  | (11.2) |  |
Ending balance at February 28, 2025 | $ | (58.6) |  |  | $ | (5.1) |  |  | $ | (63.7) |  |
Reclassification out of Accumulated Other Comprehensive Income | The following table presents the impact on earnings of reclassifications out of Accumulated other comprehensive income (loss) for the periods indicated:
| Three months ended | Nine months ended | Condensed Consolidated Statements of Operations line item
| February 28, | February 28, | February 28, | February 28,
| 2026 | 2025 | 2026 | 2025
Employee benefit plans: |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of net actuarial loss | $ | 0.4 |  |  | $ | 0.3 |  |  | $ | 1.2 |  |  | $ | 1.0 |  |  | Other components of net periodic benefit (cost)
Amortization of prior service (credit) loss |  | (0.3) |  |  |  | (0.3) |  |  |  | (0.7) |  |  |  | (0.7) |  |  | Other components of net periodic benefit (cost)
Less: Tax effect |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.2 |  |  |  | 0.2 |  | Provision (benefit) for income taxes
Total cost, net of tax | $ | 0.2 |  |  | $ | 0.1 |  |  | $ | 0.7 |  |  | $ | 0.5 |  |

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