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Note 2 - Receivables, Net (Tables)
9 Months Ended
Sep. 30, 2015
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
As of
 
 (in millions)                                                        
 
September 30,
2015
   
December 31,
2014
 
Trade receivables
  $ 320     $ 361  
Miscellaneous receivables
    56       53  
Total (net of allowances of $11 as of September 30, 2015 and December 31, 2014).
  $ 376     $ 414