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Stock-based Compensation
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Stock-based Compensation STOCK-BASED COMPENSATION
Stock Unit Awards
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
Unvested as of March 31, 2024
776.0 343.5 1,119.5 $172.40 
Granted372.4 167.9 540.3 198.64 
Vested(41.4) (41.4)203.89 
Forfeited(8.9) (8.9)173.86 
Unvested as of June 30, 2024
1,098.1 511.4 1,609.5 $180.52 
Unvested as of March 31, 2023
688.4 316.4 1,004.8 $192.36 
Granted345.2 151.8 497.0 137.67 
Vested(15.1)— (15.1)131.67 
Forfeited(15.1)(4.6)(19.7)186.15 
Unvested as of June 30, 2023
1,003.4 463.6 1,467.0 $174.54 
RSU Shares
(in 000's)
PSU Shares
(in 000's)
Total Shares
(in 000's)
Weighted Average
Grant Date
Fair Value
Unvested as of December 31, 2023
990.1 458.1 1,448.2 $175.07 
Granted372.4 168.8 541.2 198.62 
Vested(232.9)(109.0)(341.9)185.18 
Forfeited(31.5)(6.5)(38.0)172.57 
Unvested as of June 30, 2024
1,098.1 511.4 1,609.5 $180.52 
Unvested as of December 31, 2022
841.3 567.0 1,408.3 $170.78 
Granted345.2 182.8 528.0 136.13 
Vested(160.7)(257.2)(417.9)116.49 
Forfeited(22.4)(29.0)(51.4)148.89 
Unvested as of June 30, 2023
1,003.4 463.6 1,467.0 $174.54 
As of June 30, 2024, we had $126.9 million of unamortized deferred compensation related to unvested RSUs and PSUs, which we expect to be recognized over a weighted average period of 1.5 years.