STOCK-BASED COMPENSATION

6 Months Ended

Jun. 30, 2023

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 and six months ended June 30, 2023 had aggregate grant-date fair values of $12 million and $567 million, respectively. Restricted stock units and performance share units that vested during the three and six months ended June 30, 2023 had aggregate fair values at vesting of $10 million and $411 million, respectively. At June 30, 2023, there was $885 million 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 2.1 years.

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, 2023:


	Restricted Stock Units		Performance Share Units
	Shares	Weighted-average Grant-date Fair Value	Shares	Weighted-average Grant-date Fair Value
Unvested at December 31, 2022 (1)	280,460	$2,070	143,702	$2,294

Granted (2)	163,120	$2,621	51,941	$2,679
Vested	(127,428)	$1,984	(30,118)	$2,327
Performance shares adjustment (3)			33,096	$2,411
Forfeited	(9,586)	$2,283	(7,141)	$2,262
Unvested at June 30, 2023	306,566	$2,392	191,480	$2,415

(1) Excludes 14,087 performance share units awarded during the years ended December 31, 2022 and 2021 for which the grant date under Accounting Standards Codification ("ASC") 718, Compensation - Stock Compensation, was not established as of December 31, 2022. 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 9,688 performance share units awarded during the years ended December 31, 2022 and 2021 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 six months ended June 30, 2023:


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, 2022	120,813	$1,408	$	73	7.3

Exercised	(77,099)	$1,411
Forfeited	(62)	$1,411

Balance, June 30, 2023	43,652	$1,404	$	57	6.8
Exercisable at June 30, 2023	43,652	$1,404	$	57	6.8

The aggregate intrinsic value of employee stock options exercised during the three and six months ended June 30, 2023 was $3 million and $92 million, respectively.