v3.22.0.1

Equity Awards (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Information About Outstanding And Vested Stock Options | A summary of stock option activity was as follows:
| Number of Shares |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value
| (in thousands) |  |  |  | (in years) |  | (in millions)
Outstanding at December 31, 2019 | 1,154 |  |  | $ | 77.70 |  |  |  |  |
Exercised | (621) |  |  | $ | 52.98 |  |  |  |  | $ | 199 |
Canceled | (11) |  |  | $ | 75.77 |  |  |  |  |
Outstanding at December 31, 2020 | 522 |  |  | $ | 107.14 |  |  |  |  |
Granted (1) | 1,052 |  |  | $ | 676.77 |  |  |  |  |
Exercised | (267) |  |  | $ | 59.60 |  |  |  |  | $ | 140 |
Canceled | (2) |  |  | $ | 84.24 |  |  |  |  |
Outstanding at December 31, 2021 | 1,305 |  |  | $ | 551.39 |  |  | 8.8 |  | $ | 157 |
Vested and expected to vest as of December 31, 2021 | 1,037 |  |  | $ | 528.37 |  |  | 8.6 |  | $ | 148 |
Vested and exercisable as of December 31, 2021 | 178 |  |  | $ | 92.06 |  |  | 3.7 |  | $ | 99 |
(1) Includes awards assumed in business combinations
Restricted Stock Unit Table | A summary of RSU activity was as follows:
| Number of Shares |  | Weighted-Average Grant-Date Fair Value Per Share
| (in thousands) |  |
Outstanding at December 31, 2019 | 8,733 |  |  | $ | 185.39 |
Granted | 3,643 |  |  | $ | 367.52 |
Vested | (4,250) |  |  | $ | 181.85 |
Forfeited | (764) |  |  | $ | 221.84 |
Outstanding at December 31, 2020 | 7,362 |  |  | $ | 274.23 |
Granted | 2,912 |  |  | 577.26
Vested | (3,653) |  |  | $ | 268.81 |
Forfeited | (813) |  |  | 354.42
Outstanding at December 31, 2021 | 5,808 |  |  | $ | 416.00 |
Expected to vest as of December 31, 2021 | 5,209 |  |  |
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions | The following assumptions were used in the Black-Scholes options pricing model and the Monte Carlo simulation model, to estimate our stock-based compensation on the date of the grant for ESPP, stock options and PRSUs, respectively, as applicable.
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Risk Free Interest Rate |  |  |  |  |
ESPP | 0.06% - 0.11% |  | 0.11% - 2.04% |  | 2.04% - 2.46%
Stock Options | 1.20% - 1.45% |  | * |  | 1.80 | %
PRSU | 0.19% - 0.20% |  | ** |  | **
Expected Term (in years) |  |  |  |  |
ESPP | 0.5 |  | 0.5 |  | 0.5
Stock Options | 7.5 - 10 |  | * |  | 10
Expected Volatility |  |  |  |  |
ESPP | 35% - 60% |  | 30% - 60% |  | 30% - 49%
Stock Options | 38% - 41% |  | * |  | 40 | %
PRSU | 41% - 42% |  | ** |  | **
* There were no stock option grants in 2020. ** There were no grants with market conditions for the respective fiscal year.

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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