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v3.25.1

Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Mar. 31, 2025
Accumulated Other Comprehensive Loss [Abstract] |
Accumulated Other Comprehensive Loss | Changes in accumulated other comprehensive loss were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Foreign |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | Currency | ​ | Defined | ​ | Cash Flow | ​ |  | ​
​ | ​ | Translation | ​ | Benefit Plans | ​ | Hedges | ​ | Total
Balance March 31, 2024 |  | $ | (62.8) |  | $ | (100.7) |  | $ | 0.1 |  | $ | (163.4)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) before reclassifications | ​ |  | (14.0) | ​ |  | (8.7) | ​ |  | (0.9) | ​ |  | (23.6)
Reclassifications: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Amortization of unrecognized net loss (a) | ​ |  | — | ​ |  | 4.2 | ​ |  | — | ​ |  | 4.2
Realized gains - net (b) | ​ |  | — | ​ |  | — | ​ |  | (0.1) | ​ |  | (0.1)
Income taxes | ​ |  | — | ​ |  | 1.4 | ​ |  | 0.2 | ​ |  | 1.6
Total other comprehensive income (loss) | ​ |  | (14.0) | ​ |  | (3.1) | ​ |  | (0.8) | ​ |  | (17.9)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance March 31, 2025 | ​ | $ | (76.8) | ​ | $ | (103.8) | ​ | $ | (0.7) | ​ | $ | (181.3)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Foreign | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Currency | ​ | Defined | ​ | Cash Flow | ​ |  | ​
​ |  | Translation |  | Benefit Plans |  | Hedges |  | Total
Balance March 31, 2023 | ​ | $ | (57.5) |  | $ | (104.4) |  | $ | 0.8 |  | $ | (161.1)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) before reclassifications | ​ |  | (5.3) | ​ |  | 1.8 | ​ |  | 0.1 | ​ |  | (3.4)
Reclassifications: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Amortization of unrecognized net loss (a) | ​ |  | — | ​ |  | 4.1 | ​ |  | — | ​ |  | 4.1
Realized gains - net (b) | ​ |  | — | ​ |  | — | ​ |  | (1.0) | ​ |  | (1.0)
Unrecognized net pension gain in disposed businesses (c) | ​ | ​ | — | ​ |  | (0.6) | ​ |  | — | ​ |  | (0.6)
Income taxes | ​ |  | — | ​ |  | (1.6) | ​ |  | 0.2 | ​ |  | (1.4)
Total other comprehensive income (loss) | ​ |  | (5.3) | ​ |  | 3.7 | ​ |  | (0.7) | ​ |  | (2.3)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance March 31, 2024 | ​ | $ | (62.8) | ​ | $ | (100.7) | ​ | $ | 0.1 | ​ | $ | (163.4)
____ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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(a) | Amounts are included in the calculation of net periodic benefit cost for the Company’s defined benefit plans, which include pension and other postretirement plans. See Note 18 for additional information about the Company’s pension plans.
(b) | Amounts represent net gains and losses associated with cash flow hedges that were reclassified to net earnings See Note 19 for additional information regarding derivative instruments.
(c) | As a result of the sale of three automotive businesses based in Germany, the Company wrote-off $0.6 million of net actuarial gains related to the disposal group’s pension plan. See Note 2 for additional information regarding the sale.

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