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Business Segments - Schedule of Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Net Sales by segment to unaffiliated customers | $ 3,617,579 | $ 3,581,871 | $ 3,708,579
Less: |  |  |
Inventory adjustment relating to exit activities | (3,609) | (20,173) | (681)
Restructuring and other exit charges | (14,428) | (28,103) | (16,439)
Loss on assets held for sale | 4,634 | 0 | 0
Impairment of indefinite-lived intangibles | 0 | 13,619 | 480
Amortization of intangible assets | 31,805 | 27,993 | 30,748
Acquisition expense |  | 201 | 404
Integration costs |  | 420 | 138
Total operating earnings by segment | 464,686 | 351,570 | 278,361
Capital Expenditures | 121,038 | 86,437 | 88,772
Depreciation and amortization | 100,876 | 92,021 | 91,153
Property, plant, and equipment, net | 592,433 | 532,450 |
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales by segment to unaffiliated customers | 3,608,774 | 3,581,871 | 3,708,579
Segment income | 372,915 | 332,971 | 310,859
Less: |  |  |
Inventory adjustment relating to exit activities | (3,609) | (20,173) | (681)
Restructuring and other exit charges | (14,428) | (28,103) | (16,439)
Loss on assets held for sale | 4,634 |  |
Impairment of indefinite-lived intangibles |  | 13,619 | 480
Legal proceedings charge, net |  | 3,705 |
Amortization of intangible assets | 31,805 | 27,994 | 30,747
Acquisition expense | 2,498 |  |
Integration costs | 3,990 |  |
Other | 2,357 | 4,446 | 892
Total operating earnings by segment | 309,594 | 234,310 | 261,078
Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales by segment to unaffiliated customers | 8,805 | 0 | 0
Other segment items | 3,244,664 | 3,248,900 | 3,397,720
Less: |  |  |
Total operating earnings by segment | 155,092 | 117,260 | 17,283
Energy Systems |  |  |
Less: |  |  |
Capital Expenditures | 39,167 | 33,626 | 37,249
Depreciation and amortization | 50,443 | 49,469 | 52,034
Property, plant, and equipment, net | 198,841 | 189,519 |
Energy Systems | Americas |  |  |
Less: |  |  |
Acquisition expense |  | 16 | 87
Integration costs |  | 420 | 138
Energy Systems | Americas | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales by segment to unaffiliated customers | 1,531,169 | 1,590,023 | 1,738,195
Segment income | 103,206 | 86,955 | 90,400
Less: |  |  |
Inventory adjustment relating to exit activities | (274) | (17,075) | 211
Restructuring and other exit charges | (5,994) | (8,840) | (1,441)
Loss on assets held for sale | 0 |  |
Impairment of indefinite-lived intangibles |  | 13,619 | 100
Legal proceedings charge, net |  | 3,705 |
Amortization of intangible assets | 23,620 | 24,503 | 27,383
Acquisition expense | 11 |  |
Integration costs | (96) |  |
Other | 673 | 3,304 | 487
Total operating earnings by segment | 72,730 | 15,473 | 60,975
Energy Systems | Americas | Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Other segment items | 1,427,963 | 1,503,068 | 1,647,795
Motive Power |  |  |
Less: |  |  |
Capital Expenditures | 22,758 | 17,115 | 16,373
Depreciation and amortization | 23,695 | 23,690 | 22,404
Property, plant, and equipment, net | 144,076 | 145,395 |
Motive Power | EMEA |  |  |
Less: |  |  |
Acquisition expense |  | 185 | 317
Integration costs |  | 0 | 0
Motive Power | EMEA | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales by segment to unaffiliated customers | 1,484,117 | 1,456,181 | 1,451,244
Segment income | 232,755 | 214,650 | 179,972
Less: |  |  |
Inventory adjustment relating to exit activities | 0 | 0 | (892)
Restructuring and other exit charges | (5,719) | (11,697) | (12,864)
Loss on assets held for sale | 4,634 |  |
Impairment of indefinite-lived intangibles |  | 0 | 0
Legal proceedings charge, net |  | 0 |
Amortization of intangible assets | 685 | 683 | 441
Acquisition expense | 11 |  |
Integration costs | 0 |  |
Other | 1,574 | 847 | 310
Total operating earnings by segment | 220,132 | 201,238 | 165,148
Motive Power | EMEA | Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Other segment items | 1,251,362 | 1,241,531 | 1,271,272
Specialty |  |  |
Less: |  |  |
Capital Expenditures | 47,016 | 35,596 | 35,150
Depreciation and amortization | 26,706 | 18,762 | 16,715
Property, plant, and equipment, net | 236,861 | 197,368 |
Specialty | Asia |  |  |
Less: |  |  |
Acquisition expense |  | 0 | 0
Integration costs |  | 0 | 0
Specialty | Asia | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales by segment to unaffiliated customers | 593,488 | 535,667 | 519,140
Segment income | 36,954 | 31,366 | 40,487
Less: |  |  |
Inventory adjustment relating to exit activities | (3,335) | (3,098) | 0
Restructuring and other exit charges | (2,715) | (7,566) | (2,134)
Loss on assets held for sale | 0 |  |
Impairment of indefinite-lived intangibles |  | 0 | 380
Legal proceedings charge, net |  | 0 |
Amortization of intangible assets | 7,500 | 2,808 | 2,923
Acquisition expense | 2,476 |  |
Integration costs | 4,086 |  |
Other | 110 | 295 | 95
Total operating earnings by segment | 16,732 | 17,599 | 34,955
Specialty | Asia | Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Other segment items | 556,534 | 504,301 | 478,653
Other |  |  |
Less: |  |  |
Capital Expenditures | 12,097 | 100 | 0
Depreciation and amortization | 32 | 100 | $ 0
Property, plant, and equipment, net | $ 12,655 | $ 168 |

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