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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Dec. 31, 2024
Accumulated Other Comprehensive Loss |
Accumulated other comprehensive loss | Changes in accumulated other comprehensive loss were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended December 31, 2024 | ​ | Nine months ended December 31, 2024
​ |  | Foreign |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Foreign |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | Currency | ​ | Defined | ​ | Cash Flow | ​ |  | ​ | ​ | Currency | ​ | Defined | ​ | Cash Flow | ​ |  | ​
​ | ​ | Translation | ​ | Benefit Plans | ​ | Hedges | ​ | Total | ​ | Translation | ​ | Benefit Plans | ​ | Hedges | ​ | Total
Beginning balance |  | $ | (49.0) |  | $ | (99.1) |  | $ | 0.3 |  | $ | (147.8) |  | $ | (62.8) |  | $ | (100.7) |  | $ | 0.1 |  | $ | (163.4)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) before reclassifications | ​ |  | (48.2) | ​ |  | — | ​ |  | (0.1) | ​ |  | (48.3) | ​ |  | (34.4) | ​ |  | — | ​ |  | 0.3 | ​ |  | (34.1)
Reclassifications: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Amortization of unrecognized net loss (a) | ​ |  | — | ​ |  | 1.1 | ​ |  | — | ​ |  | 1.1 | ​ |  | — | ​ |  | 3.2 | ​ |  | — | ​ |  | 3.2
Realized gains - net (b) | ​ |  | — | ​ |  | — | ​ |  | (0.1) | ​ |  | (0.1) | ​ |  | — | ​ |  | — | ​ |  | (0.2) | ​ |  | (0.2)
Income taxes | ​ |  | — | ​ |  | (0.3) | ​ |  | 0.1 | ​ |  | (0.2) | ​ |  | — | ​ |  | (0.8) | ​ |  | — | ​ |  | (0.8)
Total other comprehensive income (loss) | ​ |  | (48.2) | ​ |  | 0.8 | ​ |  | (0.1) | ​ |  | (47.5) | ​ |  | (34.4) | ​ |  | 2.4 | ​ |  | 0.1 | ​ |  | (31.9)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance | ​ | $ | (97.2) | ​ | $ | (98.3) | ​ | $ | 0.2 | ​ | $ | (195.3) | ​ | $ | (97.2) | ​ | $ | (98.3) | ​ | $ | 0.2 | ​ | $ | (195.3)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended December 31, 2023 | ​ | Nine months ended December 31, 2023
​ | ​ | Foreign | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Foreign | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Currency | ​ | Defined | ​ | Cash Flow | ​ |  | ​ | ​ | Currency | ​ | Defined | ​ | Cash Flow | ​ |  | ​
​ |  | Translation |  | Benefit Plans |  | Hedges |  | Total |  | Translation |  | Benefit Plans |  | Hedges |  | Total
Beginning balance | ​ | $ | (70.8) | ​ | $ | (102.8) | ​ | $ | (0.1) | ​ | $ | (173.7) | ​ | $ | (57.5) | ​ | $ | (104.4) | ​ | $ | 0.8 | ​ | $ | (161.1)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income before reclassifications | ​ |  | 19.3 | ​ |  | — | ​ |  | 0.6 | ​ |  | 19.9 | ​ |  | 6.0 | ​ |  | — | ​ |  | 0.2 | ​ |  | 6.2
Reclassifications: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Amortization of unrecognized net loss (a) | ​ |  | — | ​ |  | 1.0 | ​ |  | — | ​ |  | 1.0 | ​ |  | — | ​ |  | 3.1 | ​ |  | — | ​ |  | 3.1
Realized losses (gains) - net (b) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 0.1 | ​ | ​ | 0.1 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.7) | ​ | ​ | (0.7)
Unrecognized net pension gain in disposed businesses (c) | ​ |  | — | ​ |  | (0.6) | ​ |  | — | ​ |  | (0.6) | ​ |  | — | ​ |  | (0.6) | ​ |  | — | ​ |  | (0.6)
Income taxes | ​ |  | — | ​ |  | (0.3) | ​ |  | (0.2) | ​ |  | (0.5) | ​ |  | — | ​ |  | (0.8) | ​ |  | 0.1 | ​ |  | (0.7)
Total other comprehensive income (loss) | ​ |  | 19.3 | ​ |  | 0.1 | ​ |  | 0.5 | ​ |  | 19.9 | ​ |  | 6.0 | ​ |  | 1.7 | ​ |  | (0.4) | ​ |  | 7.3
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance | ​ | $ | (51.5) | ​ | $ | (102.7) | ​ | $ | 0.4 | ​ | $ | (153.8) | ​ | $ | (51.5) | ​ | $ | (102.7) | ​ | $ | 0.4 | ​ | $ | (153.8)
____ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
(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 5 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.
(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 plans. See Note 2 for additional information regarding the sale.

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