Consolidated Statements of Cash Flows (FirstEnergy Corp.) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	$ 578	$ 299	$ 392
Adjustments to reconcile net income to net cash from operating activities-
Depreciation and amortization, including nuclear fuel and customer intangible amortization	1,836	1,563	2,022
Impairments of long-lived assets	42	0	795
Investment impairment, including equity method investment	464	37	90
Pension and OPEB mark-to-market adjustment	242	835	(256)
Deferred income taxes and investment tax credits, net	284	162	243
Deferred costs on sale leaseback transaction, net	48	48	48
Deferred purchased power and other costs	(105)	(115)	(76)
Asset removal costs charged to income	55	28	20
Retirement benefits	(20)	(53)	(168)
Commodity derivative transactions, net	(73)	64	(3)
Pension trust contributions	(143)	0	0
Gain on sale of investment securities held in trusts	(23)	(64)	(56)
Loss on debt redemptions	0	8	132
Make-whole premiums paid on debt redemptions	0	0	(187)
Lease payments on sale and leaseback transaction	(131)	(137)	(136)
Income from discontinued operations	0	(86)	(17)
Changes in current assets and liabilities-
Receivables	184	139	(114)
Materials and supplies	(15)	(65)	96
Prepayments and other current assets	(10)	126	(126)
Accounts payable	(243)	42	(25)
Accrued taxes	29	(165)	85
Accrued interest	(6)	31	(10)
Accrued compensation and benefits	5	(22)	19
Other current liabilities	75	23	(62)
Cash collateral, net	140	(54)	(36)
Other	234	69	(8)
Net cash provided from operating activities	3,447	2,713	2,662
New Financing-
Long-term debt	1,311	4,528	3,745
Short-term borrowings, net	0	0	1,435
Redemptions and Repayments-
Long-term debt	(879)	(1,759)	(3,600)
Short-term borrowings, net	(91)	(1,605)	0
Tender premiums paid on debt redemptions	0	0	(110)
Common stock dividend payments	(607)	(604)	(920)
Other	(13)	(47)	(73)
Net cash provided from (used for) financing activities	(279)	513	477
CASH FLOWS FROM INVESTING ACTIVITIES:
Property additions	(2,704)	(3,312)	(2,638)
Nuclear fuel	(190)	(233)	(250)
Proceeds from asset sales	20	394	4
Sales of investment securities held in trusts	1,534	2,133	2,047
Purchases of investment securities held in trusts	(1,648)	(2,236)	(2,096)
Cash investments	7	35	(23)
Asset removal costs	(142)	(153)	(146)
Other	1	13	9
Net cash used for investing activities	(3,122)	(3,359)	(3,093)
Net change in cash and cash equivalents	46	(133)	46
Cash and cash equivalents at beginning of period	85	218	172
Cash and cash equivalents at end of period	131	85	218
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest (net of amounts capitalized)	1,028	931	969
Income taxes (received), net of refunds	$ 37	$ (103)	$ 36