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Note 13 - Accumulated Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2015
Accumulated Other Comprehensive Income Loss [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
As of
 
(in millions)
 
March 31,
2015
   
December 31, 2014
 
Currency translation adjustments
  $ (39 )   $ (32 )
Unrealized gains on investments
    1       -  
Pension and other postretirement benefit plan changes
    (97 )     (104 )
Ending balance
  $ (135 )   $ (136 )