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Discontinued Operations - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]        
Earnings attributable to FE - discontinued operations, net of tax [1] $ 0 $ 47 $ 0 $ 47
Increase in NOL allocation   289    
Increase in NOL allocation tax effected   $ 61    
Cash provided by investing activities from discontinued operations       0
Cash provided by financing activities from discontinued operations       $ 0
[1] Net of income tax benefits of $47 million for the three and nine months ended September 30, 2021.