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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2012
Income Tax Disclosure [Abstract]  
Unrecognized tax benefits
 September 30, December 31,
(In millions)2012 2011
      
Unrecognized tax benefits$3,211 $2,932
      Portion that, if recognized, would reduce tax expense and effective tax rate(a) 2,469  2,209
Accrued interest on unrecognized tax benefits 602  579
Accrued penalties on unrecognized tax benefits 79  65
Reasonably possible reduction to the balance of unrecognized     
    tax benefits in succeeding 12 months 0-400  0-600
      Portion that, if recognized, would reduce tax expense and effective tax rate(a) 0-350  0-150
      
      

  • Some portion of such reduction may be reported as discontinued operations.