STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Activity of Stock Options

The following table summarizes the activity in stock options during the six months ended June 30, 2024:

Employee Stock Options	Number of Shares	Weighted-average Exercise Price	Aggregate  Intrinsic Value (in millions)		Weighted-average Remaining Contractual Term (in years)
Balance, December 31, 2023	25,523	$1,411	$	55	6.4
Exercised	(6,720)	$1,411	$	14
Balance, June 30, 2024	18,803	$1,411	$	48	5.9
Exercisable at June 30, 2024	18,803	$1,411	$	48	5.9

Activity of Restricted Stock Units and Performance Share Units

The following table summarizes the activity in restricted stock units and performance share units for employees and non-employee directors during the six months ended June 30, 2024: 

	Restricted Stock Units		Performance Share Units
	Shares	Weighted-average Grant-date Fair Value	Shares	Weighted-average Grant-date Fair Value
Unvested at December 31, 2023 (1)	291,404	$2,404	233,026	$2,467
Granted (2)	139,749	$3,512	35,301	$3,660
Vested	(128,741)	$2,327	(76,070)	$2,452
Performance shares adjustment (3)			(102)	$3,429
Forfeited	(8,110)	$2,689	(3,994)	$2,532
Unvested at June 30, 2024	294,302	$2,957	188,161	$2,695

(1)    Excludes 4,399 performance share units awarded during the year ended December 31, 2022 for which the grant date under ASC 718, Compensation - Stock Compensation, was not established as of December 31, 2023. Among other conditions, for the grant date to be established, a mutual understanding is required to be reached between the Company and the employee of the key terms and conditions of the award, including the performance targets. The performance targets for each of the annual performance periods under the award are set at the beginning of the respective year.

(2)    Includes 4,399 performance share units awarded during the year ended December 31, 2022 for which the grant date under ASC 718 was established.

(3)    Probable outcome for performance-based awards is updated based upon changes in actual and forecasted operating results or expected achievement of performance goals, as applicable, and the impact of modifications, if any.