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Tax (Tables)
9 Months Ended
Sep. 30, 2013
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,
 
     2013     2012     2013     2012  

Federal income tax at U.S. federal statutory rate

   $ 322      $ 306      $ 845      $ 922   

Foreign income tax rate differential

     (50     (29     (172     (109

State income tax, net of federal benefit

     5        7        17        24   

Nondeductible expenses

     4        —          20        23   

Tax benefit of manufacturing deduction

     (4     (12     (20     (30

Foreign dividends, net of foreign tax credits

     12        2        24        22   

Tax impact of foreign exchange

     (12     (15     27        (33

Tax rate change on temporary differences

     (16     —          (16     —     

Change in valuation allowance

     32        2        40        4   

Other

     (10     4        (19     (4
  

 

 

   

 

 

   

 

 

   

 

 

 

Provision for income taxes

   $ 283      $ 265      $ 746      $ 819