v3.22.1
Stockholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2022
Equity [Abstract]  
Summary of Stock Options and SAR Activity
A summary of stock option and SAR activity for the three months ended March 31, 2022 is as follows (in millions, except share amounts which are reflected in thousands, per share amounts, and years):
SARs Outstanding Number of SARsOptions Outstanding Number of SharesWeighted-Average Exercise Price Per ShareWeighted-Average Remaining Contractual Life (in years)Aggregate Intrinsic Value
As of December 31, 2021157 24,253 $11.84 4.35$735 
Granted4 421 $33.89 
Exercised(3)(999)$5.20 
Canceled and forfeited— (88)$14.17 
As of March 31, 2022158 23,587 $12.51 4.10$558 
Vested and expected to vest as of March 31, 2022141 17,045 $8.31 3.36$473 
Exercisable as of March 31, 2022141 17,045 $8.31 3.36$473 
Schedule of Restricted Stock Units Activity
The following table summarizes the activity related to our RSUs for the three months ended March 31, 2022 (in thousands, except per share amounts):
Number of SharesWeighted-Average
 Grant-Date Fair
 Value per Share
Unvested and outstanding as of December 31, 202171,461 $41.91 
Granted59,266 $33.65 
Vested(9,699)$39.24 
Canceled and forfeited(4,073)$39.87 
Unvested and outstanding as of March 31, 2022116,955 $37.99 
Schedule of Stock-Based Compensation Expense by Function The following table summarizes total stock-based compensation expense by function (in millions):
Three Months Ended March 31,
20212022
Operations and support$28 $33 
Sales and marketing22 22 
Research and development133 196 
General and administrative98 108 
Total$281 $359