Stock Plans - Schedule of Performance-Based Stock Options Activity (Detail) - 2018 Performance- Based Stock Incentive Plan [Member] |
12 Months Ended |
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Dec. 31, 2018
$ / shares
shares
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Weighted-Average Exercise Price, Options Granted | $ 21.25 |
| Performance-based Stock Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Options Granted | shares | 3,167,325 |
| Options, Outstanding, Ending Balance | shares | 3,167,325 |
| Weighted-Average Exercise Price, Options Granted | $ 21.25 |
| Weighted-Average Exercise Price, Outstanding, Ending Balance | $ 21.25 |
| Weighted-Average Remaining Contractual Term, Outstanding | 9 years 4 months 6 days |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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