v3.26.1
ORGANIZATION AND BASIS OF PRESENTATION - Schedule of Error Corrections related to Statements of Cash Flows (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
CASH FLOWS FROM OPERATING ACTIVITIES:            
Net income $ 352 $ 466 $ 318 $ 414 $ 818 $ 732
Adjustments to reconcile net income to net cash from operating activities-            
Depreciation and amortization         592 771
Deferred income taxes and investment tax credits, net         218 156
Net cash provided from operating activities         1,137 1,719
CASH FLOWS FROM INVESTING ACTIVITIES:            
Capital investments         (2,600) (2,233)
Net cash used for investing activities         (2,828) (2,414)
Net change in cash, cash equivalents, and restricted cash         92 460
JCP&L            
CASH FLOWS FROM OPERATING ACTIVITIES:            
Net income $ 79   62   145 109
Adjustments to reconcile net income to net cash from operating activities-            
Depreciation and amortization         (49) 114
Deferred income taxes and investment tax credits, net         74 51
Net cash provided from operating activities         107 322
CASH FLOWS FROM INVESTING ACTIVITIES:            
Capital investments         (635) (483)
Net cash used for investing activities         (679) (523)
Net change in cash, cash equivalents, and restricted cash         $ 79 0
As Reported | JCP&L            
CASH FLOWS FROM OPERATING ACTIVITIES:            
Net income     66     115
Adjustments to reconcile net income to net cash from operating activities-            
Depreciation and amortization           110
Deferred income taxes and investment tax credits, net           53
Net cash provided from operating activities           326
CASH FLOWS FROM INVESTING ACTIVITIES:            
Capital investments           (487)
Net cash used for investing activities           (527)
Net change in cash, cash equivalents, and restricted cash           0
Adjustment | JCP&L            
CASH FLOWS FROM OPERATING ACTIVITIES:            
Net income     $ (4)     (6)
Adjustments to reconcile net income to net cash from operating activities-            
Depreciation and amortization           4
Deferred income taxes and investment tax credits, net           (2)
Net cash provided from operating activities           (4)
CASH FLOWS FROM INVESTING ACTIVITIES:            
Capital investments           4
Net cash used for investing activities           4
Net change in cash, cash equivalents, and restricted cash           $ 0