Minimum percentage of fair value of grant.

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- Definition

Percentage Of Fair Market Value Of Common Stock On Grant Date

+ References

No definition available.

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- Definition

Share-Based Compensation Arrangement By Share-based Payment Award, Number Of Purchase Periods

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Offering Interval

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Offering Period

+ References

No definition available.

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- Definition

Amount of cost capitalized for award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(ii)
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Discount rate from fair value on offering date that participants pay for shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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.

+ References

No definition available.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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Stock-Based Compensation - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) period shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 23, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized stock-based compensation expense	$ 20.3	$ 9.1	$ 9.1
Share-based compensation expense not yet recognized	$ 512.9
Expected recognized period (in years)	2 years 1 month 17 days
2001 Supplemental Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years
Minimum percentage of fair value of grant	85.00%
Common stock employee purchase plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of purchase price reductions	15.00%
Number of offering periods \| period	2
Offering period (in months)	24 months
Offering interval (in months)	6 months
Purchase discount from market price (percent)	85.00%
Number of shares available for grant (in shares) \| shares	2,806,672
2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years
Number of shares available for grant (in shares) \| shares	4,623,380			4,000,000.0
Nonstatutory stock options, restricted shares, restricted stock units and stock appreciation rights \| 2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value of common stock on the grant date	85.00%
Incentive stock options \| 2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value of common stock on the grant date	100.00%
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vested and released, net	$ 417.0	$ 269.1	$ 249.8