Income Taxes (Schedule Of Income Tax (Provisions) Benefits Attributable To Income From Continuing Operations) (Details) (USD $)	3 Months Ended
Mar. 31, 2015 Rate	Mar. 31, 2014 Rate
Income Tax Disclosure [Abstract]
Current income taxes	$ 0us-gaap_CurrentIncomeTaxExpenseBenefit	$ (12,000,000)us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred income taxes	37,000,000us-gaap_DeferredIncomeTaxExpenseBenefit	(39,000,000)us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax benefit (provision)	37,000,000us-gaap_IncomeTaxExpenseBenefit	(51,000,000)us-gaap_IncomeTaxExpenseBenefit
Effective Tax Rate	33.00%	26.00%
Statutory Tax Rate	35.00%	35.00%
Unrecognized tax benefit recognized in period		21,000,000
Unrecognized Tax Benefits	$ 0us-gaap_UnrecognizedTaxBenefits

Unrecognized tax benefit recognized in period

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

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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