Book income before provision for income taxes.

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- Definition

Effective Income Tax Rate Reconciliation, Allowance for Funds Used During Construction Equity And Other Flow-through

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- Definition

Effective Income Tax Rate Reconciliation, Change in Accounting Method

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- Definition

Effective Income Tax Rate Reconciliation, Tax Basis Adjustments

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No definition available.

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- Definition

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

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-Publisher FASB

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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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-Glossary Income Tax Expense (or Benefit)

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for Medicare prescription drug benefit subsidy.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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Taxes (Details 1) (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
Reconciliation of federal income tax expense at the federal statutory rate to the total provision for income taxes
Income from Continuing Operations before provision for income taxes									$ 171	$ 570	$ 1,299
Federal income tax expense at statutory rate (35%)									60	199	455
Increases (reductions) in taxes resulting from-
Amortization of investment tax credits									(10)	(8)	(11)
State income taxes, net of federal tax benefit									12	10	79
Medicare Part D									0	0	32
Effectively settled tax items, including interest									(35)	(2)	(20)
ESOP dividend									(6)	(9)	0
Change in accounting method									(27)	0	0
Tax basis balance sheet adjustments									(25)	0	0
AFUDC equity and other flow-through									(13)	(7)	0
Other, net									2	12	10
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
Effective income tax rate (percent)									(24.60%)	34.20%	42.00%
FES
Reconciliation of federal income tax expense at the federal statutory rate to the total provision for income taxes
Income from Continuing Operations before provision for income taxes									(588)	52	276
Federal income tax expense at statutory rate (35%)									(206)	18	97
Increases (reductions) in taxes resulting from-
Amortization of investment tax credits									(4)	(4)	(4)
State income taxes, net of federal tax benefit									(14)	(5)	17
Effectively settled tax items, including interest									0	0	(11)
ESOP dividend									(1)	(2)	0
Other, net									(3)	(1)	4
Total provision for income taxes	$ (133)	$ 28	$ (67)	$ (56)	$ 25	$ 23	$ (42)	$ 0	$ (228)	$ 6	$ 103
Effective income tax rate (percent)									38.80%	11.50%	37.30%