Consolidated Balance Sheets (FirstEnergy Solutions Corp.) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 71	$ 172
Receivables-
Customers, net of allowance for uncollectible accounts	1,646	1,614
Other, net of allowance for uncollectible accounts	277	315
Materials and supplies	806	861
Derivatives	173	160
Prepayments and other	248	208
Total current assets	3,560	3,768
PROPERTY, PLANT AND EQUIPMENT:
In service	43,888	43,210
Less - Accumulated provision for depreciation	13,027	12,600
Property, plant and equipment in service net of accumulated provision for depreciation	30,861	30,610
Construction work in progress	2,230	2,293
Total net property, plant and equipment	33,091	32,903
INVESTMENTS:
Nuclear plant decommissioning trusts	2,178	2,204
Other	876	936
Total other property and investments	3,100	3,194
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	6,447	6,447
Other	1,638	1,719
Total deferred charges and other assets	10,406	10,541
Total assets	50,157	50,406
CURRENT LIABILITIES:
Currently payable long-term debt	1,952	1,999
Accounts payable-
Accrued taxes	338	543
Derivatives	142	126
Other	599	1,038
Total current liabilities	7,533	7,605
Common stockholders' equity-
Common stock	42	42
Accumulated other comprehensive income	323	385
Retained earnings	2,690	2,888
Total common stockholders' equity	12,799	13,084
Long-term debt and other long-term obligations	15,449	15,179
Total capitalization	28,252	28,272
NONCURRENT LIABILITIES:
Deferred gain on sale and leaseback transaction	875	892
Accumulated deferred income taxes	6,427	6,616
Asset retirement obligations	1,795	1,599
Retirement benefits	3,088	3,080
Other	1,703	1,836
Total noncurrent liabilities	14,372	14,529
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 12)
Total liabilities and capitalization	50,157	50,406
FES
CURRENT ASSETS:
Cash and cash equivalents	2	3
Receivables-
Customers, net of allowance for uncollectible accounts	541	483
Affiliated companies	435	379
Other, net of allowance for uncollectible accounts	122	91
Notes receivable from affiliated companies	120	276
Materials and supplies	454	505
Derivatives	170	158
Prepayments and other	129	87
Total current assets	1,973	1,982
PROPERTY, PLANT AND EQUIPMENT:
In service	12,563	11,997
Less - Accumulated provision for depreciation	4,610	4,408
Property, plant and equipment in service net of accumulated provision for depreciation	7,953	7,589
Construction work in progress	1,016	1,141
Total net property, plant and equipment	8,969	8,730
INVESTMENTS:
Nuclear plant decommissioning trusts	1,270	1,283
Other	12	12
Total other property and investments	1,282	1,295
DEFERRED CHARGES AND OTHER ASSETS:
Customer intangibles	103	110
Goodwill	24	24
Property taxes	36	36
Unamortized sale and leaseback costs	164	119
Derivatives	87	99
Other	239	253
Total deferred charges and other assets	653	641
Total assets	12,877	12,648
CURRENT LIABILITIES:
Currently payable long-term debt	859	1,102
Short-term borrowings	4	4
Accounts payable-
Affiliated companies	514	726
Other	256	159
Accrued taxes	40	171
Derivatives	140	124
Other	179	280
Total current liabilities	1,992	2,566
Common stockholders' equity-
Common stock	3,082	1,573
Accumulated other comprehensive income	62	72
Retained earnings	2,049	2,118
Total common stockholders' equity	5,193	3,763
Long-term debt and other long-term obligations	2,180	3,118
Total capitalization	7,373	6,881
NONCURRENT LIABILITIES:
Deferred gain on sale and leaseback transaction	875	892
Accumulated deferred income taxes	647	515
Asset retirement obligations	1,138	965
Retirement benefits	250	241
Derivatives	35	37
Other	567	551
Total noncurrent liabilities	3,512	3,201
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 12)
Total liabilities and capitalization	$ 12,877	$ 12,648