Annual Shareholder Return Multiplier On Absolute Basis, Percentage

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Average closing price trailing period.

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Fair value inputs revenue multiple ceiling achievement percentage.

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Fair value inputs revenue multiple threshold achievement percentage.

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Maximum payroll deductions.

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Share Based Compensation Arrangement By Share Based Payment Award, Annual Performance Metric, Percentage

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Share based compensation arrangement by share based payment award initial time period vesting requirement.

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Share based compensation arrangement by share based payment award performance percentage.

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Share Based Compensation Arrangement By Share Based Payments, Annual Target Ceiling, Base Percentage

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Span of offering period.

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

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

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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.

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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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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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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.

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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.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Number of shares authorized for issuance under share-based payment arrangement.

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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.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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Value, before forfeiture, of shares granted under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Equity Compensation Plans and Stock-Based Compensation - Additional Information (Detail) - USD ($)				1 Months Ended		3 Months Ended	12 Months Ended
	Sep. 19, 2019	Sep. 18, 2019	Sep. 28, 2017	Aug. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based awards, authorized							39,700,000
Stock-based compensation expense capitalized to inventory							$ 20,300,000	$ 20,000,000.0	$ 16,100,000
Weighted-average fair value per option granted							$ 36.84	$ 33.40	$ 36.07
Total intrinsic value of options exercised							$ 32,500,000	$ 79,900,000	$ 77,000,000.0
Net tax benefit from stock options exercised							$ 1,200,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based awards, authorized							7,000,000.0
Shares reserved for future issuance							3,600,000
Options to purchase shares of common stock, percentage							85.00%
Span of offering period, in years							2 years
Maximum percentage of qualified compensation to be used for purchase							10.00%
Maximum payroll deductions							$ 25,000
Shares issued under the Employee Stock Purchase Plan							200,000
Unrecognized compensation cost related to unvested awards							$ 14,300,000
Unrecognized compensation cost expected to recognized over weighted average period, in years							1 year 4 months 24 days
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards							$ 36,500,000
Unrecognized compensation cost expected to recognized over weighted average period, in years							2 years 4 months 24 days
Restricted Stock With Service Based Vesting Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value per RSU granted							$ 91.28	$ 84.63	$ 87.88
The total fair value of restricted stock vested and released							$ 101,000,000.0	$ 84,500,000	$ 76,500,000
Unrecognized compensation cost related to unvested awards							$ 225,500,000
Unrecognized compensation cost expected to recognized over weighted average period, in years							2 years 7 months 6 days
Granted restricted stock units							3,585,384	3,147,523
Unvested restricted stock units \| Independent Director \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years			1 year
Initial equity grant value	$ 400,000	$ 375,000
Average closing price of common stock, trailing period			3 months
March 2019 Base Restricted Stock Unit Awards with Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of threshold achievement					75.00%
Percentage of ceiling achievement					125.00%
March 2019 Base Restricted Stock Unit Awards with Performance Conditions \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of, number of shares may earned					50.00%
March 2019 Base Restricted Stock Unit Awards with Performance Conditions \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of, number of shares may earned					200.00%
2015 Base Restricted Stock Unit Awards with Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards							$ 10,500,000
Award vesting service period							1 year 8 months 12 days
Two Thousand Twenty Two Base Restricted Stock Unit Awards With Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value per RSU granted				$ 81.00
Unrecognized compensation cost related to unvested awards							$ 3,600,000
Granted restricted stock units				44,260
March 2019 Base Restricted Stock Unit Awards With Market Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value per RSU granted						$ 143.92
Unrecognized compensation cost related to unvested awards							$ 9,400,000
Unrecognized compensation cost expected to recognized over weighted average period, in years							2 years 2 months 12 days
Granted restricted stock units						99,010
Award vesting service period						3 years
Ceiling achievement level						100.00%
March 2019 Base Restricted Stock Unit Awards With Market Conditions \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares earned range						0.00%
Annual shareholder return multiplier						50.00%
March 2019 Base Restricted Stock Unit Awards With Market Conditions \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares earned range						200.00%
Restricted Stock With Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value per RSU granted							$ 94.53	$ 83.57	$ 87.42
Granted restricted stock units							226,884	256,418
2017 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance							21,500,000
2017 Equity Incentive Plan \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years							4 years
Initial time period vesting requirements							12 months
Contractual term of stock option awards, years							10 years
2017 Equity Incentive Plan \| Restricted Stock With Service Based Vesting Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years							4 years