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Note 5 - Summary of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Summary Of Other Long Term Liabilities [Abstract]    
Workers compensation $ 95 $ 96
Asset retirement obligations 47 43
Deferred taxes 14 16
Environmental liabilities 12 12
Embedded conversion features derivative liability 3  
Deferred consideration on disposed businesses   14
Other 27 21
Total $ 198 $ 202