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Subsequent Event - Additional Information (Detail) - Common Stock [Member] - Class B Common Stock - $ / shares |  | 12 Months Ended
--- | --- | ---
Feb. 11, 2020 | Dec. 31, 2019
Subsequent Event [Line Items] |  |
Cash dividend, previous rate |  | $ 1.60
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Cash dividend, current rate | $ 1.775 |

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Definition Board approved quarterly cash dividend rate applicable to april twenty twenty. + References No definition available. + Details
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- Definition Board approved quarterly cash dividend rate previous per share amount. + References No definition available. + Details
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- Details
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- Details
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- Details
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