Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2021
Stock-Based Compensation [Abstract]
Summary of Stock Option Activity	Weighted- Weighted-Average Average Remaining Number Exercise Price Contractual Aggregate of Shares Per Share Life (in years) Intrinsic ValueOutstanding at December 31, 2020 3,202 $143.01 Exercised (542) $127.11 Forfeited/canceled (13) $179.67 Outstanding at September 30, 2021 2,647 $146.08 3.1 $ 488,077Exercisable at September 30, 2021 1,913 $134.67 2.7 $ 374,680Unvested at September 30, 2021 734 $175.84 4.2 $ 113,397
Summary of Restricted Stock Unit and Performance Based Restricted Stock Unit Activity	RSUs PSUs Weighted-Average Weighted-Average Number of Grant Date Fair Number of Grant Date Fair Shares Value per Share Shares Value per Share (in thousands) (in thousands) Outstanding at December 31, 2020 (1) 274 $ 206.48 148 $ 376.48Granted (1) 107 $ 240.07 154 $ 236.70Vested (128) $ 187.29 — $ —Forfeited/canceled (8) $ 234.45 (5) $ 340.32Outstanding at September 30, 2021 245 $ 230.28 297 $ 304.47 (1)PSUs represent the target number of shares granted that are issuable at the end of the three year performance period. Fair value for a portion of the PSUs was calculated using a Monte Carlo simulation model.