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Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Restricted Stock Unit and Performance Stock Unit Activity
Restricted stock unit ("RSU") and performance stock unit ("PSU") awards activity is presented in the following tables.
RSU Shares
(in 000's)
PSU Shares
(in 000's)
Total Shares
(in 000's)
Weighted Average
Grant Date
Fair Value
Weighted Average
Remaining
Contractual Life
(in years)
Unvested as of June 30, 2022
939.0 576.9 1,515.9 $167.23 1.98
Granted59.9 1.6 61.5 172.22 
Vested(203.7) (203.7)141.15 
Forfeited(10.2)(10.6)(20.8)158.85 
Unvested as of September 30, 2022
785.0 567.9 1,352.9 $171.51 1.85
Unvested as of June 30, 2021
1,118.1 545.2 1,663.3 $144.01 1.92
Granted23.7 58.8 82.5 205.50 
Vested(199.6)— (199.6)141.21 
Forfeited(6.9)(9.4)(16.3)145.07 
Unvested as of September 30, 2021
935.3 594.6 1,529.9 $147.75 1.96
RSU Shares
(in 000's)
PSU Shares
(in 000's)
Total Shares
(in 000's)
Weighted Average
Grant Date
Fair Value
Weighted Average
Remaining
Contractual Life
(in years)
Unvested as of December 31, 2021
912.4 646.0 1,558.4 $152.27 1.99
Granted248.4 114.6 363.0 214.90 
Vested(355.1)(175.1)(530.2)145.10 
Forfeited(20.7)(17.6)(38.3)165.51 
Unvested as of September 30, 2022
785.0 567.9 1,352.9 $171.51 1.85
Unvested as of December 31, 2020
1,096.2 531.5 1,627.7 $137.42 1.69
Granted280.8 166.0 446.8 184.71 
Vested(417.8)(79.0)(496.8)146.76 
Forfeited(23.9)(23.9)(47.8)140.66 
Unvested as of September 30, 2021
935.3 594.6 1,529.9 $147.75 1.96