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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