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SHARE-BASED AWARDS AND OPTIONS (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation Expense
The following table summarizes share-based compensation expense and the related income tax benefit recognized for our share-based awards and stock options:

Years Ended December 31,
202320222021
(in thousands)
Share-based compensation expense$208,994 $163,261 $180,779 
Income tax benefit$48,446 $38,059 $42,870 
Schedule of Changes in Unvested Restricted Stock Awards and Performance Units
The following table summarizes the changes in unvested restricted stock awards and performance units for the years ended December 31, 2023, 2022 and 2021:

SharesWeighted-Average
Grant-Date
Fair Value
(in thousands)
Unvested at December 31, 20201,546 $176.71
Granted1,465 192.19
Vested(1,263)154.06
Forfeited(108)181.61
Unvested at December 31, 20211,640 184.90
Granted1,496 137.51
Vested(756)170.79
Forfeited(235)164.06
Unvested at December 31, 20222,145 159.04
Replacement Awards202 98.44
Granted1,322 112.81
Vested(1,041)157.33
Forfeited(147)128.18
Unvested at December 31, 20232,481 $131.41
Schedule of Changes in Stock Option Activity
The following table summarizes changes in stock option activity for the years ended December 31, 2023, 2022 and 2021: 

OptionsWeighted-Average Exercise PriceWeighted-Average Remaining Contractual TermAggregate Intrinsic Value
(in thousands)(years)(in millions)
Outstanding at December 31, 20201,253 $93.666.3$152.6
Granted112 196.06
Forfeited(1)113.48
Exercised(192)68.4224.1
Outstanding at December 31, 20211,172 107.445.847.4
Granted154 136.02
Forfeited(89)147.65
Exercised(98)65.695.5
Outstanding at December 31, 20221,139 111.755.417.3
Replacement Awards142 98.44
Granted233 110.83
Forfeited(297)155.35
Exercised(296)89.089.4
Outstanding at December 31, 2023921 $99.545.0$32.1
Options vested and exercisable at December 31, 2023647 $96.413.6$25.3
Schedule of Fair Valuation Assumptions Fair value was estimated on the date of grant using the Black-Scholes valuation model with the following weighted-average assumptions:
Years Ended December 31,
202320222021
Risk-free interest rate3.84%1.87%0.59%
Expected volatility45%40%40%
Dividend yield0.81%0.56%0.44%
Expected term (years)555