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Note 5 - Summary of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Summary Of Other Long Term Liabilities [Abstract]    
Workers compensation $ 96 $ 96
Asset retirement obligations 46 43
Deferred taxes 16 16
Deferred consideration on disposed businesses   14
Environmental liabilities 12 12
Embedded conversion features derivative liability 9  
Other 28 21
Total $ 207 $ 202