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Capital Stock - Additional Information (Detail) | Mar. 30, 2019 Vote Class $ / shares | Mar. 31, 2018 $ / shares | [1]
--- | --- | --- | ---
Class of Stock [Line Items] |  |
Preferred shares par value | $ / shares | $ 0 | $ 0
Number of classes of common stock outstanding | Class | 2 |
Class A Common Stock [Member] |  |
Class of Stock [Line Items] |  |
Common stock voting rights per share | 1 |
Class B Common Stock [Member] |  |
Class of Stock [Line Items] |  |
Common stock voting rights per share | 10 |
[1] | Recast (refer to note 1)

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