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Restructuring and Other Exit Charges - (Additional Information) (Details) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |
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Jul. 22, 2025 USD ($) Employee | Nov. 30, 2022 USD ($) | Sep. 28, 2025 USD ($) | Jul. 03, 2022 USD ($) | Sep. 28, 2025 USD ($) | Sep. 29, 2024 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Jun. 29, 2025 Employee | Apr. 01, 2025 USD ($) | Nov. 08, 2023 USD ($) | Jan. 01, 2023 USD ($) Employee | Jun. 29, 2022 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance costs |  |  |  |  | $ 3,927,000 |  |  |  |  |  |  |  |  |  |  |
Write-off of assets relating to exit activities |  |  |  |  | (619,000) | $ 244,000 |  |  |  |  |  |  |  |  |  |
Inventory write-down |  |  |  |  |  | $ 1,883,000 |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  | $ 6,020,000 |  |  |  |  |  |  |  |
Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit charges |  |  | $ 1,032,000 |  | 5,642,000 |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  | 20,054,000 |  | 21,306,000 |  |  |  |  |  |  |  |  |  |  |
OutBack And Mojave Brands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 24,500,000 |  |
OutBack And Mojave Brands | Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,600,000 |  |
Write-off of assets relating to exit activities |  |  |  |  |  |  | $ 333,000 | 551,000 |  |  |  |  |  |  |  |
OutBack And Mojave Brands | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  | 900,000 |  |
Write-off of assets relating to exit activities |  |  |  |  |  |  | 275,000 | 689,000 |  |  |  |  |  |  |  |
OutBack And Mojave Brands | Inventories, Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of assets relating to exit activities |  |  |  |  |  |  |  | 17,075,000 |  |  |  |  |  |  |  |
Closure Of Facility In Spokane, Washington |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,600,000 |  |
Closure Of Facility In Spokane, Washington | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,400,000 |  |
Write-off of assets relating to exit activities |  |  |  |  |  |  |  | 1,343,000 |  |  |  |  |  |  |  |
Closure Of Facility In Spokane, Washington | Fixed Asset Write Off, Non-Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,200,000 |  |
Write-off of assets relating to exit activities |  |  |  |  |  |  |  | 2,066,000 |  |  |  |  |  |  |  |
Closure Of Facility In Spokane, Washington | Other Restructuring |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of assets relating to exit activities |  |  |  |  |  |  | 669,000 |  |  |  |  |  |  |  |  |
Closure of Facility in Sylmar, California |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of assets relating to exit activities |  | $ 9,769,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit charges |  | 13,661,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Closure of Facility in Sylmar, California | Fixed Asset Write Off, Non-Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  | $ 3,892,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Closure of Facility in Sylmar, California | Severance, Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  |  | 7,155,000 | $ 1,682,000 |  |  |  |  |  |  |
Closure of Facility in Sylmar, California | Contract Assets, Non-Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  |  | 377,000 | 417,000 |  |  |  |  |  |  |
Closure of Facility in Sylmar, California | Inventory, Non-Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  |  | 3,098,000 |  |  |  |  |  |  |  |
Closure of Facility in Sylmar, California | Relocation Charges, Cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  | 931,000 |  |  |  |  |  |  |  |  |
Closure Of Facility In Ooltewah, Tennessee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,500,000
Number of positions eliminated | Employee |  |  |  |  |  |  |  |  |  |  |  | 165 |  |  |  |
Closure Of Facility In Ooltewah, Tennessee | Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  | 7,261,000 |  |  |  |  |  |  | 9,300,000
Closure Of Facility In Ooltewah, Tennessee | Inventories, Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  | 1,613,000 |  |  |  |  |  |  |
Closure Of Facility In Ooltewah, Tennessee | Cash charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  | $ 2,735,000 |  |  |  |  |  |  | $ 9,200,000
Closure Of Facility In Ooltewah, Tennessee | Site Clean Up, Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  | 1,142,000 |  | 474,000 | 4,399,000 |  |  |  |  |  |  |  |
Closure of Facility in Hagen, Germany |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 60,000,000 |
Number of positions eliminated | Employee |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200 |
Inventory write-down |  |  |  |  |  |  |  |  |  | $ 960,000 |  |  |  |  |  |
Closure of Facility in Hagen, Germany | Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000,000 |
Closure of Facility in Hagen, Germany | Severance, Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  |  |  |  | 3,522,000 | $ 7,946,000 |  |  |  |  |
Closure of Facility in Hagen, Germany | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  |  |  |  | $ 8,069,000 |  |  |  |  |  |
Closure of Facility in Hagen, Germany | Cash charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 40,000 |
Closure of Facility in Hagen, Germany | Severance, Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  |  |  |  |  |  |  |  | $ 23,331,000 |  |  |  |  |
Closure of Facility in Hagen, Germany | Site Clean Up, Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  | $ 2,207,000 | 775,000 |  | 3,625,000 | 2,118,000 |  |  |  |  |  |  |  |
Closure of Facility in Hagen, Germany | Accelerated Depreciation, Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  |  | $ 562,000 | 16,000 |  | $ 598,000 | $ 526,000 |  |  |  |  |  |  |  |
The Plan | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated number of positions eliminated | Employee | 575 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated number of positions eliminated (as a percent) | 0.11 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
The Plan | Employee Severance | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges | $ 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Flooded Motive Power Batteries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,700,000 |  |  |
Flooded Motive Power Batteries | Non Cash Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |
Flooded Motive Power Batteries | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected additional restructuring charges |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,200,000 |  |  |
Energy Systems | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit charges |  |  | 116,000 |  | 407,000 |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  | 9,145,000 |  | 9,908,000 |  |  |  |  |  |  |  |  |  |  |
Energy Systems | The Plan | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance costs |  |  |  |  | 19,619,000 |  |  |  |  |  |  |  |  |  |  |
Motive Power | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit charges |  |  | 199,000 |  | 4,518,000 |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  | 9,132,000 |  | 9,620,000 |  |  |  |  |  |  |  |  |  |  |
Specialty | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit charges |  |  | 717,000 |  | 717,000 |  |  |  |  |  |  |  |  |  |  |
Other restructuring costs |  |  | $ 1,648,000 |  | $ 1,649,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 + Details
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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 330 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483080/330-10-50-2 + Details
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- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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- Definition The number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s). + References No definition available. + Details
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