Income Taxes (Provision (Benefit) For Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal Current	$ 11us-gaap_CurrentFederalTaxExpenseBenefit	$ (12)us-gaap_CurrentFederalTaxExpenseBenefit	$ 16us-gaap_CurrentFederalTaxExpenseBenefit
State Current	10	1	3
Total Current	21us-gaap_CurrentIncomeTaxExpenseBenefit	(11)us-gaap_CurrentIncomeTaxExpenseBenefit	19us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal Deferred	501	408	(388)
State Deferred	2	88	(72)
Foreign Deferred	1	1	(2)
Total Deferred	504us-gaap_DeferredIncomeTaxExpenseBenefit	497us-gaap_DeferredIncomeTaxExpenseBenefit	(462)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision (benefit) for income taxes	$ 525us-gaap_IncomeTaxExpenseBenefit	$ 486us-gaap_IncomeTaxExpenseBenefit	$ (443)us-gaap_IncomeTaxExpenseBenefit

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

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