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Stock-Based Compensation - Stock Options Outstanding Roll Forward (Detail) - Equity Option [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at December 31, 2018	1,067
Granted	160	267	146
Exercised	(282)
Canceled	(254)
Outstanding at December 31, 2019	691	1,067
Weighted-average exercise price of options outstanding at beginning of period	$ 179.59
Weighted-average exercise price of options granted	281.33	$ 215.12	$ 230.37
Weighted-average exercise price of options exercised	165.29
Weighted average exercise price of options canceled	198.05
Weighted-average exercise price of options outstanding at end of period	202.24	179.59
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average exercise price of options outstanding at beginning of period	75.94
Weighted-average exercise price of options granted	250.15
Weighted-average exercise price of options exercised	75.94
Weighted average exercise price of options canceled	139.51
Weighted-average exercise price of options outstanding at end of period	88.71	75.94
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average exercise price of options outstanding at beginning of period	238.52
Weighted-average exercise price of options granted	371.64
Weighted-average exercise price of options exercised	238.52
Weighted average exercise price of options canceled	280.80
Weighted-average exercise price of options outstanding at end of period	$ 371.64	$ 238.52

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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