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Tax (Tables)
9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]  
Difference Between Effective Tax Rate

The difference between the effective tax rate reflected in the provision for income taxes and the U.S. federal statutory rate of 35% was as follows (in millions):

 

     Three Months Ended
September 30,
     Nine Months Ended
September 30,
 
     2015      2014      2015      2014  

Federal income tax at U.S. federal statutory rate

   $ 67       $ 344       $ 380       $ 932   

Foreign income tax rate differential

     (30      (91      (117      (189

State income tax, net of federal benefit

     —           8         3         23   

Nondeductible expenses

     —           1         17         20   

Tax benefit of manufacturing deduction

     7         (13      (3      (31

Foreign dividends, net of foreign tax credits

     (1      113         14         134   

Tax impact of foreign exchange

     (4      16         (22      14   

Change in valuation allowance

     —           (94      —           (92

Change in tax reserves

     (2      —           67         —     

Other

     (1      (1      (9      (5
  

 

 

    

 

 

    

 

 

    

 

 

 

Provision for income taxes

   $ 36       $ 283       $ 330       $ 806