STOCK-BASED COMPENSATION

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

The Company maintains equity incentive plans that include broad-based grants of restricted stock units, performance share units granted to officers and certain other employees, and stock options granted to certain employees.

Restricted stock units and performance share units granted by the Company during the three months ended March 31, 2024 had an aggregate grant-date fair value of $594 million. Restricted stock units and performance share units that vested during the three months ended March 31, 2024 had an aggregate fair value at vesting of $699 million. At March 31, 2024, there was $1.1 billion of estimated total future stock-based compensation expense related to unvested restricted stock units and performance share units to be recognized over a weighted-average period of 2.2 years.

The following table summarizes the activity in restricted stock units and performance share units for employees and non-employee directors during the three months ended March 31, 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)	133,817	$3,500	34,237	$3,664
Vested	(124,084)	$2,323	(75,562)	$2,453
Performance shares adjustment (3)			3,740	$3,770
Forfeited	(3,498)	$2,606	(368)	$2,381
Unvested at March 31, 2024	297,639	$2,928	195,073	$2,711

(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.

The following table summarizes the activity in stock options during the three months ended March 31, 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	(4,567)	$1,411	$	9


Balance, March 31, 2024	20,956	$1,411	$	46	6.1
Exercisable at March 31, 2024	20,956	$1,411	$	46	6.1