Consolidated Balance Sheets (Unaudited) (FirstEnergy Corp.) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 94	$ 202
Receivables-
Customers, net of allowance for uncollectible accounts	1,635	1,525
Other, net of allowance for uncollectible accounts	263	269
Materials and supplies	921	811
Prepaid taxes	248	191
Derivatives	276	235
Other	171	122
Total current assets	3,608	3,355
In service	41,167	40,122
PROPERTY, PLANT AND EQUIPMENT:
Less - Accumulated provision for depreciation	12,336	11,839
Property, plant and equipment in service net of accumulated provision for depreciation	28,831	28,283
Construction work in progress	1,937	2,054
Total net property, plant and equipment	30,768	30,337
INVESTMENTS:
Nuclear plant decommissioning trusts	2,153	2,112
Investments in lease obligation bonds	326	402
Other	1,039	1,008
Total other property and investments	3,518	3,522
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	6,444	6,441
Regulatory assets	2,122	2,030
Other	1,588	1,641
Total deferred charges and other assets	10,154	10,112
Total assets	48,048	47,326
CURRENT LIABILITIES:
Currently payable long-term debt	1,577	1,621
Short-term borrowings	1,890	0
Accounts payable	1,052	1,174
Accrued taxes	436	558
Accrued compensation and benefits	288	384
Derivatives	222	218
Other	617	900
Total current liabilities	6,082	4,855
Common stockholders' equity-
Common stock	42	42
Other paid-in capital	9,756	9,765
Accumulated other comprehensive income	389	426
Retained earnings (Accumulated deficit)	3,310	3,047
Total common stockholders' equity	13,497	13,280
Noncontrolling interest	15	19
Total equity	13,512	13,299
Long-term debt and other long-term obligations	15,159	15,716
Total capitalization	28,671	29,015
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	6,042	5,670
Retirement benefits	2,257	2,823
Asset retirement obligations	1,548	1,497
Deferred gain on sale and leaseback transaction	909	925
Adverse power contract liability	559	469
Other	1,980	2,072
Total noncurrent liabilities	13,295	13,456
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 9)
Total liabilities and capitalization	$ 48,048	$ 47,326