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Stock-Based Compensation - RSU Activity (Details) - RSUs
shares in Millions
3 Months Ended
Mar. 31, 2022
$ / shares
shares
RSUs, Number of shares  
RSUs outstanding, beginning (shares) | shares 3.1
RSUs granted (shares) | shares 1.6
RSUs vested (shares) | shares (0.4)
RSUs canceled (shares) | shares (0.1)
RSUs outstanding, ending (shares) | shares 4.2
RSUs, Weighted average grant date fair value  
RSUs outstanding, beginning (dollars per share) | $ / shares $ 24.96
RSUs granted (dollars per share) | $ / shares 27.17
RSUs vested (dollars per share) | $ / shares 28.24
RSUs canceled (dollars per share) | $ / shares 24.26
RSUs outstanding, ending (dollars per share) | $ / shares $ 25.43