Provision for Income Taxes Tax Provison (Benefit) Table (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current :
Federal	$ (9)us-gaap_CurrentFederalTaxExpenseBenefit	$ (17)us-gaap_CurrentFederalTaxExpenseBenefit	$ 91us-gaap_CurrentFederalTaxExpenseBenefit
State	2	7	17
Foreign	10us-gaap_CurrentForeignTaxExpenseBenefit	(13)us-gaap_CurrentForeignTaxExpenseBenefit	40us-gaap_CurrentForeignTaxExpenseBenefit
Total	3us-gaap_CurrentIncomeTaxExpenseBenefit	(23)us-gaap_CurrentIncomeTaxExpenseBenefit	148us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	1,108	348	220
State	119	40	(13)
Foreign	19	36	5
Total	1,246us-gaap_DeferredIncomeTaxExpenseBenefit	424us-gaap_DeferredIncomeTaxExpenseBenefit	212us-gaap_DeferredIncomeTaxExpenseBenefit
Provision (benefit) for income taxes	$ 1,249us-gaap_IncomeTaxExpenseBenefit	$ 401us-gaap_IncomeTaxExpenseBenefit	$ 360us-gaap_IncomeTaxExpenseBenefit

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

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