XML 80 R57.htm IDEA: XBRL DOCUMENT v3.10.0.1
Discontinued Operations - Summarized Results of Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Income tax expense (benefit)                 $ 1,251 $ 820 $ 3,582
Discontinued operations (Note 3) $ (44) $ (845) $ 11 $ 1,204 $ (1,438) $ 95 $ (46) $ (46)      
Income (loss) from discontinued operations                 326 (1,435) (6,728)
FES and FENOC | Discontinued Operations, Disposed of by Means Other than Sale                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Revenues                 989 3,055 3,794
Fuel                 (304) (879) (1,073)
Purchased power                 (84) (268) (533)
Other operating expenses                 (435) (1,499) (1,263)
Provision for depreciation                 (96) (109) (378)
General taxes                 (35) (103) (129)
Impairment of assets                 0 (2,358) (10,622)
Other expense, net                 (83) (94) (106)
Income (Loss) from discontinued operations, before tax                 (48) (2,255) (10,310)
Income tax expense (benefit)                 61 (820) (3,582)
Discontinued operations (Note 3)                 (109) (1,435) (6,728)
Gain on deconsolidation, net of tax                 435 0 0
Income (loss) from discontinued operations                 326 (1,435) $ (6,728)
Tax benefit from excess deferred tax liabilities     $ 32                
Nondeductible portion of interest expense                 $ 60 27  
FES and FENOC | Discontinued Operations, Disposed of by Means Other than Sale | Pleasants Power Station                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Impairment of assets         $ (120)            
Competitive Asset Generation Sale | Discontinued Operations, Disposed of by Means Other than Sale                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Impairment of assets                   $ (193)