Product Warranties - Additional Information (Detail) |
12 Months Ended |
|---|---|
Mar. 31, 2019 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Limited warranty period | 30 years |
| X | ||||||||||
- Definition Limited warranty period on its products. No definition available.
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| X | ||||||||||
- References No definition available.
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