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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands | 12 Months Ended | 48 Months Ended
--- | --- | ---
Mar. 31, 2025 USD ($) segments | Mar. 31, 2024 USD ($) | Mar. 31, 2020
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 | $ | $ (184,592) | $ (136,360) |
Number of operating segments | 4 |  |
Number of reportable segments | 4 |  |
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 |  |
Market condition-based Share Units (TSR) |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Vesting period, in years |  |  | 3 years
Total shareholder return, return from average grant price, percentage |  |  | 25.00%
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 | Market condition-based Share Units (TSR) |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Total shareholder return, number of awards granted, percentage |  |  | 0.00%
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 | Building 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 | Market condition-based Share Units (TSR) |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Total shareholder return, number of awards granted, percentage |  |  | 200.00%
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 | Building 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 |  |

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