Goodwill - Additional Information (Detail) - USD ($) |
12 Months Ended | ||
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Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Goodwill Roll Forward | |||
| Impairment of goodwill | $ 0 | $ 0 | $ 0 |
| Closing market price of common stock | $ 721.54 | ||
| Book value per share | $ 231.31 | ||
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- Definition Book value of common stock per share. No definition available.
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- Definition Common stock price per share, closing price of period No definition available.
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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