Consolidated Statements of Income (Loss) and Comprehensive Income (Loss) (FirstEnergy Solutions Corp.) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES:
Electric sales		$ 3,782	$ 4,390	$ 5,178
Total revenues	[1]	14,562	15,026	15,049
OPERATING EXPENSES:
Fuel		1,666	1,855	2,280
Purchased power		3,813	4,318	4,716
Other operating expenses		3,858	3,749	3,962
Pension and OPEB mark-to-market adjustment		147	242	835
Provision for depreciation		1,313	1,282	1,220
General taxes		1,042	978	962
Impairment of assets (Note 2)		10,665	42	0
Total operating expenses		22,824	12,734	13,987
OPERATING INCOME (LOSS)		(8,262)	2,292	1,062
OTHER INCOME (EXPENSE):
Investment income (loss), including net income from equity investees		84	(22)	72
Interest expense		(1,157)	(1,132)	(1,081)
Capitalized interest		103	117	118
Total other expense		(970)	(1,399)	(891)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES (BENEFITS)		(9,232)	893	171
INCOME TAXES (BENEFITS)		(3,055)	315	(42)
INCOME (LOSS) FROM CONTINUING OPERATIONS		(6,177)	578	213
Discontinued operations (net of income taxes of $70) (Note 20)		0	0	86
NET INCOME (LOSS)		(6,177)	578	299
STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
NET INCOME (LOSS)		(6,177)	578	299
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and OPEB prior service costs		(59)	(116)	(76)
Amortized gain on derivative hedges		8	5	(2)
Change in unrealized gain on available-for-sale securities		55	(11)	26
Other comprehensive income (loss)		4	(122)	(52)
Income taxes (benefits) on other comprehensive income (loss )		1	(47)	(14)
Other comprehensive income (loss), net of tax		3	(75)	(38)
FES
REVENUES:
Other		160	188	169
Total revenues	[2]	4,398	5,005	6,144
OPERATING EXPENSES:
Fuel		780	871	1,253
Other operating expenses		1,277	1,308	1,635
Pension and OPEB mark-to-market adjustment		48	57	297
Provision for depreciation		336	324	319
General taxes		88	98	128
Impairment of assets (Note 2)		8,622	33	0
Total operating expenses		12,795	4,728	6,674
OPERATING INCOME (LOSS)		(8,397)	277	(530)
OTHER INCOME (EXPENSE):
Investment income (loss), including net income from equity investees		67	(14)	61
Miscellaneous income		7	3	6
Capitalized interest		34	35	34
Total other expense		(46)	(130)	(58)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES (BENEFITS)		(8,443)	147	(588)
INCOME TAXES (BENEFITS)		(2,988)	65	(228)
INCOME (LOSS) FROM CONTINUING OPERATIONS		(5,455)	82	(360)
Discontinued operations (net of income taxes of $70) (Note 20)		0	0	116
NET INCOME (LOSS)		(5,455)	82	(244)
STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
NET INCOME (LOSS)		(5,455)	82	(244)
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and OPEB prior service costs		(14)	(6)	(6)
Amortized gain on derivative hedges		0	(3)	(10)
Change in unrealized gain on available-for-sale securities		52	(9)	21
Other comprehensive income (loss)		38	(18)	5
Income taxes (benefits) on other comprehensive income (loss )		15	(7)	2
Other comprehensive income (loss), net of tax		23	(11)	3
COMPREHENSIVE INCOME (LOSS)		(5,432)	71	(241)
FES | Affiliates
REVENUES:
Electric sales		457	664	861
OPERATING EXPENSES:
Purchased power		624	353	271
OTHER INCOME (EXPENSE):
Interest expense		(7)	(7)	(7)
FES | Non-Affiliates
REVENUES:
Electric sales		3,781	4,153	5,114
OPERATING EXPENSES:
Purchased power		1,020	1,684	2,771
OTHER INCOME (EXPENSE):
Interest expense		$ (147)	$ (147)	$ (152)

[1] Includes excise tax collections of $406 million, $416 million and $420 million in 2016, 2015 and 2014, respectively.

[2] Includes excise tax collections of $28 million, $44 million and $69 million in 2016, 2015 and 2014, respectively.