Consolidated Statements of Income and Comprehensive Income (Unaudited) (FirstEnergy Solutions Corp.) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUES:
Electric sales	$ 1,590	$ 1,470	$ 3,157	$ 2,711
Total revenues	2,279	2,590	4,790	4,925
OPERATING EXPENSES:
Fuel	656	635	1,197	1,088
Purchased power	1,156	1,220	2,503	2,406
Other operating expenses	914	1,065	1,726	2,058
Provision for depreciation	292	287	577	512
General taxes	232	242	504	479
Total operating expenses	3,312	3,539	6,644	6,765
OPERATING INCOME (LOSS)	557	521	1,303	871
OTHER INCOME (EXPENSE):
Investment income	13	31	24	52
Interest expense	(274)	(265)	(520)	(496)
Capitalized interest	19	20	36	38
Total other income (expense)	(242)	(214)	(460)	(406)
INCOME BEFORE INCOME TAXES	315	307	843	465
INCOME TAXES (BENEFITS)	127	114	349	225
NET INCOME	188	193	494	240
STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	188	193	494	240
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and OPEB prior service costs	(48)	48	(101)	4
Amortized gain (loss) on derivative hedges	3	17	1	11
Change in unrealized gain on available-for-sale securities	2	10	12	19
Other comprehensive income (loss)	(43)	75	(88)	34
Income taxes (benefits) on other comprehensive income (loss)	(27)	33	(51)	14
Other comprehensive income (loss), net of tax	(16)	42	(37)	20
COMPREHENSIVE INCOME	172	235	457	260
FES
REVENUES:
Other	54	70	117	156
Total revenues	1,456	1,292	2,972	2,684
OPERATING EXPENSES:
Fuel	380	316	675	659
Other operating expenses	393	413	688	878
Provision for depreciation	69	69	132	138
General taxes	32	30	69	60
Impairment of long-lived assets	0	7	0	20
Total operating expenses	1,441	1,229	2,735	2,515
OPERATING INCOME (LOSS)	15	63	237	169
OTHER INCOME (EXPENSE):
Investment income	6	16	12	22
Miscellaneous income	20	4	24	8
Capitalized interest	9	10	18	20
Total other income (expense)	(15)	(24)	(39)	(58)
INCOME BEFORE INCOME TAXES	0	39	198	111
INCOME TAXES (BENEFITS)	1	10	77	37
NET INCOME	(1)	29	121	74
STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	(1)	29	121	74
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and OPEB prior service costs	8	(5)	3	(9)
Amortized gain (loss) on derivative hedges	1	14	(4)	5
Change in unrealized gain on available-for-sale securities	3	8	13	15
Other comprehensive income (loss)	12	17	12	11
Income taxes (benefits) on other comprehensive income (loss)	2	8	4	4
Other comprehensive income (loss), net of tax	10	9	8	7
COMPREHENSIVE INCOME	9	38	129	81
FES | Affiliates
REVENUES:
Electric sales	109	170	230	431
OPERATING EXPENSES:
Purchased power	133	65	250	134
OTHER INCOME (EXPENSE):
Interest expense	(2)	(2)	(4)	(3)
FES | Non-Affiliates
REVENUES:
Electric sales	1,293	1,052	2,625	2,097
OPERATING EXPENSES:
Purchased power	434	329	921	626
OTHER INCOME (EXPENSE):
Interest expense	$ (48)	$ (52)	$ (89)	$ (105)