Consolidated Statements of Cash Flows (Jersey Central Power & Light Company) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	$ 771	$ 869	$ 718
Adjustments to reconcile net income to net cash from operating activities-
Provision for depreciation	1,124	1,066	750
Asset removal costs charged to income	203	55	18
Deferral of storm costs	(375)	(145)	(14)
Amortization of regulatory assets, net	307	474	736
Deferred purchased power and other costs	(238)	(278)	(254)
Deferred income taxes and investment tax credits, net	647	798	450
Pensions and OPEB mark-to-market adjustment	609	507	190
Accrued compensation and retirement benefits	(55)	69	21
Cash collateral, net	16	(79)	(26)
Pension trust contribution	(600)	(372)	0
Decrease (increase) in operating assets-
Receivables	(13)	147	(177)
Increase (decrease) in operating liabilities-
Accounts payable	71	35	43
Accrued taxes	6	91	57
Accrued interest	(12)	(12)	7
Other	98	(79)	15
Net cash provided from operating activities	2,320	3,063	3,076
New financing-
Short-term borrowings, net	1,969	0	0
Redemptions and Repayments-
Long-term debt	(940)	(1,909)	(1,015)
Common stock dividend payments	(920)	(881)	(670)
Other	(52)	(38)	(19)
Net cash provided from (used for) financing activities	807	(2,924)	(983)
CASH FLOWS FROM INVESTING ACTIVITIES:
Property additions	(2,678)	(2,129)	(1,780)
Sales of investment securities held in trusts	2,980	4,207	3,172
Purchases of investment securities held in trusts	(3,020)	(4,309)	(3,219)
Other	(41)	51	27
Net cash used for investing activities	(3,157)	(956)	(1,948)
Net change in cash and cash equivalents	(30)	(817)	145
Cash and cash equivalents at beginning of period	202	1,019	874
Cash and cash equivalents at end of period	172	202	1,019
Cash paid (received) during the year-
Interest (net of amounts capitalized)	962	935	662
Income taxes	(6)	(358)	(42)
JCP&L
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	133	144	183
Adjustments to reconcile net income to net cash from operating activities-
Provision for depreciation	109	103	107
Asset removal costs charged to income	166	32	6
Deferral of storm costs	(279)	(92)	(19)
Amortization of regulatory assets, net	52	200	340
Deferred purchased power and other costs	(105)	(93)	(105)
Deferred income taxes and investment tax credits, net	245	91	31
Pensions and OPEB mark-to-market adjustment	65	60	26
Accrued compensation and retirement benefits	(37)	(32)	(7)
Cash collateral, net	4	0	(23)
Pension trust contribution	0	(105)	0
Decrease (increase) in operating assets-
Receivables	12	160	(67)
Prepaid taxes	(12)	(22)	24
Increase (decrease) in operating liabilities-
Accounts payable	7	(83)	(20)
Accrued taxes	(2)	11	12
Other	26	11	(11)
Net cash provided from operating activities	384	385	477
New financing-
Short-term borrowings, net	246	259	0
Redemptions and Repayments-
Long-term debt	(34)	(32)	(31)
Common stock dividend payments	(190)	(500)	(165)
Other	0	(1)	0
Net cash provided from (used for) financing activities	22	(274)	(196)
CASH FLOWS FROM INVESTING ACTIVITIES:
Property additions	(293)	(229)	(182)
Loans to affiliated companies, net	0	177	(74)
Sales of investment securities held in trusts	516	779	411
Purchases of investment securities held in trusts	(530)	(796)	(428)
Cost of removal	(93)	(35)	(6)
Other	(6)	(7)	(2)
Net cash used for investing activities	(406)	(111)	(281)
Net change in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	0	0	0
Cash paid (received) during the year-
Interest (net of amounts capitalized)	118	118	117
Income taxes	$ (51)	$ (8)	$ 145