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Note 7 - Summary of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Sep. 03, 2013
Summary Of Other Long Term Liabilities [Abstract]      
Workers compensation $ 113 $ 123  
Environmental liabilities 13 19  
Asset retirement obligations 47 53  
Other 104 127  
Total $ 277 $ 322 $ 18