Consolidated Balance Sheets (FirstEnergy Corp.) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 85	$ 218
Receivables-
Customers, net of allowance for uncollectible accounts of $59 in 2014 and $52 in 2013	1,554	1,720
Other, net of allowance for uncollectible accounts of $5 in 2014 and $3 in 2013	225	198
Materials and supplies, at average cost	817	752
Prepaid taxes	128	226
Derivatives	159	166
Accumulated deferred income taxes	518	366
Collateral	230	155
Other	160	212
Total current assets	3,876	4,013
PROPERTY, PLANT AND EQUIPMENT:
In service	47,484	44,228
Less - Accumulated provision for depreciation	14,150	13,280
Property, plant and equipment in service net of accumulated provision for depreciation	33,334	30,948
Construction work in progress	2,449	2,304
Total net property, plant and equipment	35,783	33,252
INVESTMENTS:
Nuclear plant decommissioning trusts	2,341	2,201
Other	881	903
Total other property and investments	3,222	3,104
ASSETS HELD FOR SALE (Note 19)	0	235
DEFERRED CHARGES AND OTHER ASSETS:
Goodwill	6,418	6,418
Regulatory assets	1,411	1,854
Other	1,456	1,548
Total deferred charges and other assets	9,285	9,820
Total assets	52,166	50,424
CURRENT LIABILITIES:
Currently payable long-term debt	804	1,415
Short-term borrowings	1,799	3,404
Accounts payable	1,279	1,250
Accrued taxes	490	485
Accrued compensation and benefits	329	351
Derivatives	167	111
Other	693	621
Total current liabilities	5,561	7,637
Common stockholders' equity-
Common stock, $0.10 par value, authorized 490,000,000 shares - 421,102,570 and 418,628,559 shares outstanding as of December 31, 2014 and December 31, 2013, respectively	42	42
Other paid-in capital	9,847	9,776
Accumulated other comprehensive income	246	284
Retained earnings	2,285	2,590
Total common stockholders' equity	12,420	12,692
Noncontrolling interest	2	3
Total equity	12,422	12,695
Long-term debt and other long-term obligations	19,176	15,831
Total capitalization	31,598	28,526
NONCURRENT LIABILITIES:
Accumulated deferred income taxes	7,057	6,968
Retirement benefits	3,932	2,689
Asset retirement obligations	1,387	1,678
Deferred gain on sale and leaseback transaction	824	858
Adverse power contract liability	217	290
Other	1,590	1,778
Total noncurrent liabilities	15,007	14,261
COMMITMENTS, GUARANTEES AND CONTINGENCIES (Note 15)
Total liabilities and capitalization	$ 52,166	$ 50,424