EARNINGS PER SHARE OF COMMON STOCK - Schedule of Reconciles Basic and Diluted Eps Attributable to FE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Earnings Attributable to FE	$ 360	$ 253
Share count information:
Weighted average number of basic shares outstanding (in shares)	577	574
Assumed exercise of dilutive share-based awards (in shares)	1	2
Weighted average number of diluted shares outstanding (in shares)	578	576
EPS Attributable to FE:
Basic EPS (in dollars per share)	$ 0.62	$ 0.44
Diluted EPS (in dollars per share)	$ 0.62	$ 0.44

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details