Income Taxes (Components of Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Federal:
Current	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ (28)us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
Deferred	(121)	(110)	24
State:
Current	1	1	(2)
Deferred	1	1	(11)
Foreign:
Current	457us-gaap_CurrentForeignTaxExpenseBenefit	509us-gaap_CurrentForeignTaxExpenseBenefit	538us-gaap_CurrentForeignTaxExpenseBenefit
Deferred	81	(30)	136
Total	$ 419us-gaap_IncomeTaxExpenseBenefit	$ 343us-gaap_IncomeTaxExpenseBenefit	$ 685us-gaap_IncomeTaxExpenseBenefit

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

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