Cash and cash equivalents include all highly liquid investments with an original maturity, when purchased

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Cost Method Investment, Ownership Percentage

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Increase (Decrease) In Cost of Goods And Services Sold, Inflation Reduction Act

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Percentage Of Ownership Interests

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Percentage of restricted stock units granted, vested per year.

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Product warranty for a period

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Summary Of Significant Accounting Policies [Line Items]

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Useful life of finite-lived intangible asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Useful life of property, plant, and equipment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	12 Months Ended			15 Months Ended
	Mar. 31, 2026 USD ($) segment	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents include all highly liquid investments with an original maturity, when purchased, in months	3 months
Increase (decrease) in cost of goods and income tax payable \| $	$ (158,593)	$ (184,592)	$ (136,360)
Number of operating segments \| segment	4
Number of reportable segments \| segment	4
Qualifying Products
Summary Of Significant Accounting Policies [Line Items]
Increase (decrease) in cost of goods and income tax payable \| $				$ 25,037
Restricted Stock and Restricted Stock Units
Summary Of Significant Accounting Policies [Line Items]
Percentage of restricted stock units granted, vested per year	25.00%
Vesting period, in years	4 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of investment ownership, consolidated	50.00%
Estimated useful lives of finite-lived assets	3 years
Minimum \| Investments In Affiliates
Summary Of Significant Accounting Policies [Line Items]
Percentage of investment ownership, equity method	20.00%
Minimum \| Energy Systems Batteries
Summary Of Significant Accounting Policies [Line Items]
Product warranty for a period	1 year
Minimum \| Motive Power Batteries
Summary Of Significant Accounting Policies [Line Items]
Product warranty for a period	1 year
Minimum \| Specialty Transportation Batteries
Summary Of Significant Accounting Policies [Line Items]
Product warranty for a period	1 year
Minimum \| Buildings and improvements
Summary Of Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	10 years
Minimum \| Machinery and equipment
Summary Of Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Percentage of investment ownership, cost method	20.00%
Estimated useful lives of finite-lived assets	20 years
Maximum \| Investments In Affiliates
Summary Of Significant Accounting Policies [Line Items]
Percentage of investment ownership, equity method	50.00%
Maximum \| Energy Systems Batteries
Summary Of Significant Accounting Policies [Line Items]
Product warranty for a period	20 years
Maximum \| Motive Power Batteries
Summary Of Significant Accounting Policies [Line Items]
Product warranty for a period	5 years
Maximum \| Specialty Transportation Batteries
Summary Of Significant Accounting Policies [Line Items]
Product warranty for a period	4 years
Maximum \| Buildings and improvements
Summary Of Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	33 years
Maximum \| Machinery and equipment
Summary Of Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	15 years