Consolidated Balance Sheets (Unaudited) (FirstEnergy Corp.) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 150	$ 202
Receivables-
Customers, net of allowance for uncollectible accounts	1,604	1,525
Other, net of allowance for uncollectible accounts	227	269
Materials and supplies	875	811
Prepaid taxes	227	191
Derivatives	212	235
Accumulated deferred income taxes	224	0
Other	190	122
Total current assets	3,709	3,355
PROPERTY, PLANT AND EQUIPMENT:
In service	41,756	40,122
Less - Accumulated provision for depreciation	12,434	11,839
Property, plant and equipment in service net of accumulated provision for depreciation	29,322	28,283
Construction work in progress	2,119	2,054
Total net property, plant and equipment	31,441	30,337
INVESTMENTS:
Nuclear plant decommissioning trusts	2,203	2,112
Investments in lease obligation bonds	210	402
Other	1,038	1,008
Total other property and investments	3,451	3,522
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	6,444	6,441
Regulatory assets	2,113	2,030
Other	1,580	1,641
Total deferred charges and other assets	10,137	10,112
Total assets	48,738	47,326
CURRENT LIABILITIES:
Currently payable long-term debt	1,473	1,621
Short-term borrowings	1,604	0
Accounts payable	925	1,174
Accrued taxes	508	558
Accrued compensation and benefits	313	384
Derivatives	155	218
Other	942	900
Total current liabilities	5,920	4,855
Common stockholders' equity-
Common stock	42	42
Other paid-in capital	9,758	9,765
Accumulated other comprehensive income	367	426
Retained earnings (Accumulated deficit)	3,266	3,047
Total common stockholders' equity	13,433	13,280
Noncontrolling interest	16	19
Total equity	13,449	13,299
Long-term debt and other long-term obligations	15,627	15,716
Total capitalization	29,076	29,015
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	6,543	5,670
Retirement benefits	2,271	2,823
Asset retirement obligations	1,574	1,497
Deferred gain on sale and leaseback transaction	900	925
Adverse power contract liability	550	469
Other	1,904	2,072
Total noncurrent liabilities	13,742	13,456
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 10)
Total liabilities and capitalization	$ 48,738	$ 47,326