Income Taxes Pre-tax income and income tax expense (benefit) (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (loss) before income taxes and equity income	$ 2,152,000,000	$ 5,648,000,000	$ (30,257,000,000)
Basis Difference Related to Fair Value Changes	4,100,000,000	4,100,000,000
Basis Differences Resulting from Indefinitely Reinvested Earnings	3,000,000,000	2,600,000,000
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	(23,000,000)us-gaap_CurrentFederalTaxExpenseBenefit	(34,000,000)us-gaap_CurrentFederalTaxExpenseBenefit	6,000,000us-gaap_CurrentFederalTaxExpenseBenefit
Current State and Local Tax Expense (Benefit)	154,000,000	88,000,000	78,000,000
Current Foreign Tax Expense (Benefit)	671,000,000us-gaap_CurrentForeignTaxExpenseBenefit	512,000,000us-gaap_CurrentForeignTaxExpenseBenefit	646,000,000us-gaap_CurrentForeignTaxExpenseBenefit
Current Income Tax Expense (Benefit)	802,000,000us-gaap_CurrentIncomeTaxExpenseBenefit	566,000,000us-gaap_CurrentIncomeTaxExpenseBenefit	730,000,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred Federal Income Tax Expense (Benefit)	(581,000,000)	1,049,000,000	(28,965,000,000)
Deferred State and Local Income Tax Expense (Benefit)	(60,000,000)	137,000,000	(3,415,000,000)
Deferred Foreign Income Tax Expense (Benefit)	67,000,000	375,000,000	(3,181,000,000)
Deferred Income Tax Expense (Benefit)	(574,000,000)us-gaap_DeferredIncomeTaxExpenseBenefit	1,561,000,000us-gaap_DeferredIncomeTaxExpenseBenefit	(35,561,000,000)us-gaap_DeferredIncomeTaxExpenseBenefit
Income Tax Expense (Benefit)	228,000,000us-gaap_IncomeTaxExpenseBenefit	2,127,000,000us-gaap_IncomeTaxExpenseBenefit	(34,831,000,000)us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense (benefit) at U.S. federal statutory income tax rate	753,000,000	1,977,000,000	(10,590,000,000)
State and local tax expense	73,000,000	145,000,000	254,000,000
Non-U.S. income taxed at other than 35%	(72,000,000)	(168,000,000)	908,000,000
Foreign Tax Credit Election Change	0	0	(1,075,000,000)
U.S. Tax on Non-U.S. Income	(8,000,000)	543,000,000	713,000,000
Change in valuation allowance	(402,000,000)	182,000,000	(33,917,000,000)
Change in Tax Laws	602,000,000	146,000,000	67,000,000
Research Incentives	(279,000,000)	(490,000,000)	(68,000,000)
Goodwill Impairment	41,000,000	124,000,000	8,705,000,000
Settlements of Prior Year Tax Matters	(275,000,000)	(473,000,000)	0
Realization of Basis Differences in Affiliates	(256,000,000)	0	0
Foreign Currency Remeasurement	124,000,000	(21,000,000)	(36,000,000)
U.S. salaried pension plan settlement	0	0	541,000,000
Other Adjustments	(73,000,000)	162,000,000	(333,000,000)
U.S.
Income (loss) before income taxes and equity income	1,683,000,000	4,880,000,000	(19,063,000,000)
Non-U.S.
Income (loss) before income taxes and equity income	$ 469,000,000	$ 768,000,000	$ (11,194,000,000)

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. This amount represent the portion of basis difference attributable to fair value changes of the investees.

No definition available.