Consolidated Balance Sheets (FirstEnergy Solutions Corp.) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 67	$ 172
Receivables-
Customers, net of allowance for uncollectible accounts	1,631	1,614
Other, net of allowance for uncollectible accounts	227	315
Materials and supplies	835	861
Derivatives	183	160
Prepayments and other	214	208
Total current assets	3,499	3,768
PROPERTY, PLANT AND EQUIPMENT:
In service	43,748	43,210
Less - Accumulated provision for depreciation	12,823	12,600
Property, plant and equipment in service net of accumulated provision for depreciation	30,925	30,610
Construction work in progress	2,361	2,293
Total net property, plant and equipment	33,286	32,903
INVESTMENTS:
Nuclear plant decommissioning trusts	2,227	2,204
Other	934	936
Total other property and investments	3,215	3,194
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	6,447	6,447
Other	1,665	1,719
Total deferred charges and other assets	10,424	10,541
Total assets	50,424	50,406
CURRENT LIABILITIES:
Currently payable long-term debt	2,296	1,999
Accounts payable-
Accrued taxes	392	543
Derivatives	126	126
Other	946	1,038
Total current liabilities	7,132	7,605
Common stockholders' equity-
Common stock	42	42
Accumulated other comprehensive income	361	385
Retained earnings (accumulated deficit)	2,854	2,888
Total common stockholders' equity	12,996	13,084
Long-term debt and other long-term obligations	15,814	15,179
Total capitalization	28,814	28,272
NONCURRENT LIABILITIES:
Deferred gain on sale and leaseback transaction	883	892
Accumulated deferred income taxes	6,542	6,616
Asset retirement obligations	1,767	1,599
Retirement benefits	3,070	3,080
Other	1,751	1,836
Total noncurrent liabilities	14,478	14,529
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 11)
Total liabilities and capitalization	50,424	50,406
FES
CURRENT ASSETS:
Cash and cash equivalents	3	3
Receivables-
Customers, net of allowance for uncollectible accounts	489	483
Affiliated companies	496	379
Other, net of allowance for uncollectible accounts	145	91
Notes receivable from affiliated companies	0	276
Materials and supplies	477	505
Derivatives	183	158
Prepayments and other	106	87
Total current assets	1,899	1,982
PROPERTY, PLANT AND EQUIPMENT:
In service	12,336	11,997
Less - Accumulated provision for depreciation	4,508	4,408
Property, plant and equipment in service net of accumulated provision for depreciation	7,828	7,589
Construction work in progress	1,089	1,141
Total net property, plant and equipment	8,917	8,730
INVESTMENTS:
Nuclear plant decommissioning trusts	1,306	1,283
Other	13	12
Total other property and investments	1,319	1,295
DEFERRED CHARGES AND OTHER ASSETS:
Customer intangibles	107	110
Goodwill	24	24
Property taxes	36	36
Unamortized sale and leaseback costs	147	119
Derivatives	87	99
Other	238	253
Total deferred charges and other assets	639	641
Total assets	12,774	12,648
CURRENT LIABILITIES:
Currently payable long-term debt	1,516	1,102
Short-term borrowings-
Short-term borrowings	4	4
Accounts payable-
Affiliated companies	495	726
Other	199	159
Accrued taxes	68	171
Derivatives	125	124
Other	208	280
Total current liabilities	3,317	2,566
Common stockholders' equity-
Common stock	1,581	1,573
Accumulated other comprehensive income	71	72
Retained earnings (accumulated deficit)	2,120	2,118
Total common stockholders' equity	3,772	3,763
Long-term debt and other long-term obligations	2,226	3,118
Total capitalization	5,998	6,881
NONCURRENT LIABILITIES:
Deferred gain on sale and leaseback transaction	883	892
Accumulated deferred income taxes	591	515
Asset retirement obligations	1,121	965
Retirement benefits	245	241
Derivatives	53	37
Other	566	551
Total noncurrent liabilities	3,459	3,201
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 11)
Total liabilities and capitalization	12,774	12,648
FES | Associated companies
Short-term borrowings-
Short-term borrowings	$ 702	$ 0