Earnings Per Share Of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Earnings attributable to FE	$ 187	$ 58	$ 475	$ 393
Share count information:
Weighted average number of basic shares outstanding (in shares)	571,000	544,000	571,000	544,000
Assumed exercise of dilutive stock options and awards (in shares)	1,000	1,000	1,000	1,000
Weighted average number of diluted shares outstanding	572,000	545,000	572,000	545,000
EPS Attributable to FE:
Basic - EPS (in dollars per share)	$ 0.33	$ 0.11	$ 0.83	$ 0.72
Diluted - EPS (in dollars per share)	$ 0.33	$ 0.11	$ 0.83	$ 0.72
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted shares outstanding, in shares	0	0	0	0