Stock-based Compensation

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

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		Weighted Average Remaining Contractual Life (in years)
Unvested as of December 31, 2023	990.1	458.1	1,448.2	$	175.07	1.66
Granted	—	0.9	0.9	187.26
Vested	(191.5)	(109.0)	(300.5)	182.60
Forfeited	(22.6)	(6.5)	(29.1)	172.26
Unvested as of March 31, 2024	776.0	343.5	1,119.5	$	172.40	1.30

Unvested as of December 31, 2022	841.3	567.0	1,408.3	$	170.78	1.79
Granted	—	31.0	31.0	111.33
Vested	(145.6)	(257.2)	(402.8)	115.92
Forfeited	(7.3)	(24.4)	(31.7)	125.84
Unvested as of March 31, 2023	688.4	316.4	1,004.8	$	192.36	1.66

As of March 31, 2024, we had $61.0 million of unamortized deferred compensation related to unvested RSUs and PSUs, which we anticipate recognizing over varying periods into 2027.