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Tax (Tables)
3 Months Ended
Mar. 31, 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
March 31,
 
     2013     2012  

Federal income tax at U.S. federal statutory rate

   $ 253      $ 306   

Foreign income tax rate differential

     (57     (23

State income tax, net of federal benefit

     8        8   

Nondeductible expenses

     8        13   

Tax benefit of manufacturing deduction

     (8     (9

Foreign dividends, net of foreign tax credits

     4        6   

Tax impact of foreign exchange

     18        (30

Other

     (2     (2
  

 

 

   

 

 

 

Provision for income taxes

   $ 224      $ 269