Consolidated Statements of Cash Flows (Unaudited) (FirstEnergy Solutions Corp.) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 494	$ 240
Adjustments to reconcile net income to net cash from operating activities-
Provision for depreciation	577	512
Nuclear fuel and lease amortization	106	92
Deferred rents and lease market valuation liability	(106)	(61)
Deferred income taxes and investment tax credits, net	423	598
Asset impairments	7	41
Accrued compensation and retirement benefits	(160)	(31)
Pension trust contribution	(600)	(262)
Commodity derivative transactions, net	(86)	(21)
Cash collateral, net	22	(31)
Decrease (increase) in operating assets-
Receivables	(105)	199
Materials and supplies	(109)	24
Prepayments and other current assets	(117)	(268)
Increase (decrease) in operating liabilities-
Accounts payable	(122)	(28)
Accrued taxes	(192)	(66)
Other	65	47
Net cash provided from operating activities	62	1,031
New financing-
Long-term debt	182	503
Short-term borrowings, net	1,890	0
Redemptions and Repayments-
Long-term debt	(746)	(1,002)
Other	(35)	(76)
Net cash provided from (used for) financing activities	831	(1,039)
CASH FLOWS FROM INVESTING ACTIVITIES:
Property additions	(1,001)	(1,018)
Sales of investment securities held in trusts	382	1,703
Purchases of investment securities held in trusts	(420)	(1,807)
Other	(49)	(53)
Net cash used for investing activities	(1,001)	(535)
Net change in cash and cash equivalents	(108)	(543)
Cash and cash equivalents at beginning of period	202	1,019
Cash and cash equivalents at end of period	94	476
FES
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	121	74
Adjustments to reconcile net income to net cash from operating activities-
Provision for depreciation	132	138
Nuclear fuel and lease amortization	103	92
Deferred rents and lease market valuation liability	(103)	(58)
Deferred income taxes and investment tax credits, net	162	138
Asset impairments	6	28
Gain on asset sales	(17)	0
Accrued compensation and retirement benefits	14	(24)
Pension trust contribution	(209)	0
Commodity derivative transactions, net	(53)	(60)
Cash collateral, net	17	(40)
Decrease (increase) in operating assets-
Receivables	0	(36)
Materials and supplies	(56)	50
Prepayments and other current assets	19	12
Increase (decrease) in operating liabilities-
Accounts payable	243	(124)
Accrued taxes	(167)	(29)
Other	7	21
Net cash provided from operating activities	219	182
New financing-
Long-term debt	82	247
Short-term borrowings, net	0	530
Redemptions and Repayments-
Long-term debt	(140)	(472)
Other	(6)	(11)
Net cash provided from (used for) financing activities	(64)	294
CASH FLOWS FROM INVESTING ACTIVITIES:
Property additions	(303)	(334)
Proceeds from assets sale	17	0
Sales of investment securities held in trusts	109	513
Purchases of investment securities held in trusts	(127)	(545)
Loans to affiliated companies, net	155	(93)
Other	(6)	(20)
Net cash used for investing activities	(155)	(479)
Net change in cash and cash equivalents	0	(3)
Cash and cash equivalents at beginning of period	7	9
Cash and cash equivalents at end of period	$ 7	$ 6