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Income Taxes (Unaudited) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
U.S. operations	$ (835)us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations	$ 136us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations
International operations	140us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations	221us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations
Total	(695)us-gaap_IncomeTaxExpenseBenefit	357us-gaap_IncomeTaxExpenseBenefit
Consolidated effective income tax rate (percent)	22.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	36.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (458)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Topic 235

-SubTopic 10

-Section S99

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-Number 210

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

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-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-URI http://asc.fasb.org/extlink&oid=6515339



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Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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