Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 74	$ 202
Receivables-
Customers, net of allowance for uncollectible accounts	1,449	1,525
Other, net of allowance for uncollectible accounts	286	269
Materials and supplies	927	811
Prepaid taxes	213	191
Derivatives	346	235
Prepayments and other	182	122
Total current assets	3,477	3,355
PROPERTY, PLANT AND EQUIPMENT:
In service	40,587	40,122
Less - Accumulated provision for depreciation	12,086	11,839
Property, plant and equipment in service net of accumulated provision for depreciation	28,501	28,283
Construction work in progress	2,065	2,054
Total net property, plant and equipment	30,566	30,337
OTHER PROPERTY AND INVESTMENTS:
Nuclear plant decommissioning trusts		2,112
Investments in lease obligation bonds	336	402
Other	1,011	1,008
Total other property and investments	3,482	3,522
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	6,444	6,441
Regulatory assets	2,006	2,030
Other	1,716	1,641
Total deferred charges and other assets	10,166	10,112
Total assets	47,691	47,326
CURRENT LIABILITIES:
Currently payable long-term debt	1,772	1,621
Short-term borrowings-
Short-term borrowings	1,075	0
Accounts payable-
Accounts payable	918	1,174
Accrued taxes	442	558
Accrued compensation and benefits	258	384
Derivatives	299	218
Other	1,009	900
Total current liabilities	5,773	4,855
Common stockholders' equity-
Common stock	42	42
Other paid-in capital	9,754	9,765
Accumulated other comprehensive income	405	426
Retained earnings (Accumulated deficit)	3,122	3,047
Total common stockholders' equity	13,323	13,280
Noncontrolling interest	16	19
Total equity	13,339	13,299
Long-term debt and other long-term obligations	15,527	15,716
Total capitalization	28,866	29,015
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	5,904	5,670
Retirement benefits	2,240	2,823
Asset retirement obligations	1,522	1,497
Deferred gain on sale and leaseback transaction	917	925
Adverse power contract liability	458	469
Other	2,011	2,072
Total noncurrent liabilities	13,052	13,456
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 9)
Total liabilities and capitalization	47,691	47,326
FES
CURRENT ASSETS:
Cash and cash equivalents	7	7
Receivables-
Customers, net of allowance for uncollectible accounts	395	424
Affiliated companies	541	600
Other, net of allowance for uncollectible accounts	122	61
Notes receivable from affiliated companies	12	383
Materials and supplies	551	492
Derivatives	322	219
Prepayments and other	24	38
Total current assets	1,974	2,224
PROPERTY, PLANT AND EQUIPMENT:
In service	11,002	10,983
Less - Accumulated provision for depreciation	4,214	4,110
Property, plant and equipment in service net of accumulated provision for depreciation	6,788	6,873
Construction work in progress	1,173	1,014
Total net property, plant and equipment	7,961	7,887
OTHER PROPERTY AND INVESTMENTS:
Nuclear plant decommissioning trusts	1,240	1,223
Other	7	7
Total other property and investments	1,247	1,230
DEFERRED CHARGES AND OTHER ASSETS:
Customer intangibles	120	123
Goodwill	24	24
Property taxes	43	43
Unamortized sale and leaseback costs	120	80
Derivatives	117	79
Other	171	129
Total deferred charges and other assets	595	478
Total assets	11,777	11,819
CURRENT LIABILITIES:
Currently payable long-term debt	905	905
Accounts payable-
Affiliated companies	483	436
Other	190	220
Accrued taxes	75	227
Derivatives	281	189
Other	245	261
Total current liabilities	2,179	2,238
Common stockholders' equity-
Common stock	1,568	1,570
Accumulated other comprehensive income	74	76
Retained earnings (Accumulated deficit)	2,053	1,931
Total common stockholders' equity	3,695	3,577
Long-term debt and other long-term obligations	2,797	2,799
Total capitalization	6,492	6,376
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	365	286
Retirement benefits	151	356
Asset retirement obligations	919	904
Deferred gain on sale and leaseback transaction	917	925
Lease market valuation liability	160	171
Other	594	563
Total noncurrent liabilities	3,106	3,205
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 9)
Total liabilities and capitalization	11,777	11,819
FES | Affiliates [Member]
Short-term borrowings-
Short-term borrowings	0	0
OE
CURRENT ASSETS:
Cash and cash equivalents	0	26
Receivables-
Customers, net of allowance for uncollectible accounts	154	163
Affiliated companies	72	86
Other, net of allowance for uncollectible accounts	37	41
Notes receivable from affiliated companies	259	181
Prepayments and other	11	17
Total current assets	533	514
PROPERTY, PLANT AND EQUIPMENT:
In service	3,405	3,358
Less - Accumulated provision for depreciation	1,280	1,267
Property, plant and equipment in service net of accumulated provision for depreciation	2,125	2,091
Construction work in progress	85	91
Total net property, plant and equipment	2,210	2,182
OTHER PROPERTY AND INVESTMENTS:
Nuclear plant decommissioning trusts	137	137
Investments in lease obligation bonds	162	163
Other	92	90
Total other property and investments	391	390
DEFERRED CHARGES AND OTHER ASSETS:
Regulatory assets	362	363
Pension assets	6	5
Property taxes	80	81
Unamortized sale and leaseback costs	24	25
Other	16	14
Total deferred charges and other assets	488	488
Total assets	3,622	3,574
CURRENT LIABILITIES:
Currently payable long-term debt	3	2
Accounts payable-
Affiliated companies	110	119
Other	34	35
Accrued taxes	88	88
Accrued interest	25	25
Other	102	79
Total current liabilities	362	348
Common stockholders' equity-
Common stock	747	747
Accumulated other comprehensive income	49	54
Retained earnings (Accumulated deficit)	(53)	(84)
Total common stockholders' equity	743	717
Noncontrolling interest	5	5
Total equity	748	722
Long-term debt and other long-term obligations	1,156	1,155
Total capitalization	1,904	1,877
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	791	787
Retirement benefits	213	213
Asset retirement obligations	73	71
Accumulated deferred investment tax credits	8	9
Other	271	269
Total noncurrent liabilities	1,356	1,349
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 9)
Total liabilities and capitalization	3,622	3,574
JCP&L
CURRENT ASSETS:
Cash and cash equivalents	0	0
Receivables-
Customers, net of allowance for uncollectible accounts	202	235
Affiliated companies	35	0
Other, net of allowance for uncollectible accounts	16	17
Prepaid taxes	39	33
Prepayments and other	24	19
Total current assets	316	304
PROPERTY, PLANT AND EQUIPMENT:
In service	5,022	4,872
Less - Accumulated provision for depreciation	1,759	1,743
Property, plant and equipment in service net of accumulated provision for depreciation	3,263	3,129
Construction work in progress	119	227
Total net property, plant and equipment	3,382	3,356
OTHER PROPERTY AND INVESTMENTS:
Nuclear plant decommissioning trusts	195	193
Nuclear fuel disposal trust	225	219
Other	2	2
Total other property and investments	422	414
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	1,811	1,811
Regulatory assets	384	408
Other	32	32
Total deferred charges and other assets	2,227	2,251
Total assets	6,347	6,325
CURRENT LIABILITIES:
Currently payable long-term debt	34	34
Accounts payable-
Affiliated companies	3	19
Other	94	101
Accrued interest	30	18
Accrued compensation and benefits	33	41
Customer deposits	24	24
Other	41	36
Total current liabilities	559	532
Common stockholders' equity-
Common stock	136	136
Other paid-in capital	2,011	2,011
Accumulated other comprehensive income	36	39
Retained earnings (Accumulated deficit)	146	121
Total common stockholders' equity	2,329	2,307
Long-term debt and other long-term obligations	1,729	1,736
Total capitalization	4,058	4,043
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	908	859
Retirement benefits	163	170
Asset retirement obligations	117	115
Power purchase contract liability	136	147
Nuclear fuel disposal costs	197	197
Other	209	262
Total noncurrent liabilities	1,730	1,750
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 9)
Total liabilities and capitalization	6,347	6,325
JCP&L | Affiliates [Member]
Short-term borrowings-
Affiliated companies	$ 300	$ 259