STOCK-BASED COMPENSATION PLANS (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

Stock-based compensation costs and the amount of stock-based compensation costs capitalized related to FirstEnergy plans for the years ended December 31, 2021, 2020 and 2019, are included in the following tables:

	For the Years Ended December 31,
Stock-based Compensation Plan	2021		2020		2019
	(In millions)
Restricted Stock Units	$	40	$	22	$	73
Restricted Stock	2		1		1
401(k) Savings Plan	35		33		33
EDCP & DCPD	13		(5)		9
Total	$	90	$	51	$	116
Stock-based compensation costs capitalized	$	47	$	26	$	54

Schedule of Nonvested Restricted Stock Units Activity

Restricted stock unit activity for the year ended December 31, 2021, was as follows:

Restricted Stock Unit Activity	Shares (in millions)	Weighted-Average Grant Date Fair Value (per share)
Nonvested as of January 1, 2021	1.8	$	40.25
Granted in 2021	1.3	35.50
Forfeited in 2021	(0.3)	40.08
Vested in 2021(1)	(1.0)	33.73
Nonvested as of December 31, 2021	1.8	$	41.89

(1) Excludes dividend equivalents of approximately 130 thousand shares earned during vesting period