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Discontinued Operation, Tax Effect of Discontinued Operation, Deferred

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.

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Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Currently payable (receivable)-
Federal									$ (132)us-gaap_CurrentFederalTaxExpenseBenefit	$ (118)us-gaap_CurrentFederalTaxExpenseBenefit	$ (130)us-gaap_CurrentFederalTaxExpenseBenefit
State									(72)	70	28
Currently payable (receivable) Total									(204)us-gaap_CurrentIncomeTaxExpenseBenefit	(48)us-gaap_CurrentIncomeTaxExpenseBenefit	(102)us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred, net-
Federal									214	305	580
State									(42)	(54)	78
Deferred Tax Total									172us-gaap_DeferredIncomeTaxExpenseBenefit	251us-gaap_DeferredIncomeTaxExpenseBenefit	658us-gaap_DeferredIncomeTaxExpenseBenefit
Investment tax credit amortization									(10)us-gaap_InvestmentTaxCredit	(8)us-gaap_InvestmentTaxCredit	(11)us-gaap_InvestmentTaxCredit
Total provision for income taxes	(268)us-gaap_IncomeTaxExpenseBenefit	152us-gaap_IncomeTaxExpenseBenefit	26us-gaap_IncomeTaxExpenseBenefit	48us-gaap_IncomeTaxExpenseBenefit	66us-gaap_IncomeTaxExpenseBenefit	77us-gaap_IncomeTaxExpenseBenefit	(62)us-gaap_IncomeTaxExpenseBenefit	114us-gaap_IncomeTaxExpenseBenefit	(42)us-gaap_IncomeTaxExpenseBenefit	195us-gaap_IncomeTaxExpenseBenefit	545us-gaap_IncomeTaxExpenseBenefit
Internal Revenue Service (IRS) [Member]
Deferred, net-
Current tax effect of discontinued operation									106
Defered tax effect of discontinued operation									44
State and Local Jurisdiction [Member]
Deferred, net-
Current tax effect of discontinued operation									12
Defered tax effect of discontinued operation									5
FES
Currently payable (receivable)-
Federal									(222)	(300)	(128)
State									(13)	(3)	17
Currently payable (receivable) Total									(235)	(303)	(111)
Deferred, net-
Federal									25	317	209
State									(14)	(4)	9
Deferred Tax Total									11	313	218
Investment tax credit amortization									(4)	(4)	(4)
Total provision for income taxes	$ (133)	$ 28	$ (67)	$ (56)	$ 25	$ 23	$ (42)	$ 0	$ (228)	$ 6	$ 103