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Income Taxes (Details Textuals) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes (Textuals)        
U.S. statutory federal income tax rate 35.00% 35.00% 35.00%  
Aggregate of federal taxes $ 3,000,000,000      
Income taxes paid 2,000,000,000 1,900,000,000 700,000,000  
Unrecognized tax benefits 1,044,000,000 1,230,000,000 1,223,000,000 1,377,000,000
Unrecognized tax benefits as a result of potential resolutions of prior years' tax 632,000,000      
Unrecognized tax benefits that affect effective tax rate 427,000,000 452,000,000 440,000,000  
Unrecognized tax benefits, amounts recorded to equity 474,000,000      
Unrecognized tax benefits impact not possible to quantify 158,000,000      
Unrecognized tax benefits income tax penalties and interest expense 31,000,000 8,000,000 63,000,000  
Unrecognized tax benefits income tax penalties and interest accrued 144,000,000 155,000,000    
Tax Benefits from Discontinued Operations     36,000,000  
Income Taxes Of Non Us Subsidiaries [Line Items]        
Accumulated earnings intended to be permanently reinvested outside the U.S. 9,600,000,000      
Internal Revenue Service (IRS) [Member] | Earliest Year [Member]
        
Income Tax Contingency [Line Items]        
Open tax years by major tax jurisdiction 2008      
Internal Revenue Service (IRS) [Member] | Latest Year [Member]
        
Income Tax Contingency [Line Items]        
Open tax years by major tax jurisdiction 2011      
International [Member]
        
Income Taxes Of Non Us Subsidiaries [Line Items]        
Benefits related to the realization of certain foreign tax credits   $ 146,000,000 $ 77,000,000  
Decrease in tax rate related to the realization of certain foreign tax credits   2.30% 1.10%