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Note 2 - Receivables, Net (Details) - Receivables, Net - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Receivables, Net [Abstract]    
Trade receivables $ 318 $ 361
Miscellaneous receivables 47 53
Total (net of allowances of $10 and $11 as of December 31, 2015 and December 31, 2014, respectively) $ 365 $ 414