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Note 13 - Accumulated Other Comprehensive Loss (Tables)
9 Months Ended
Sep. 30, 2015
Accumulated Other Comprehensive Income Loss [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
As of
 
(in millions)
 
September 30,
2015
   
December 31, 2014
 
Currency translation adjustments
  $ (59 )   $ (32 )
Unrealized loss on investments
    (1 )     -  
Pension and other postretirement benefit plan changes     (102 )     (104 )
Total   $ (162 )   $ (136 )