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Note 7 - Summary of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Summary Of Other Long Term Liabilities [Abstract]    
Workers compensation $ 104 $ 105
Asset retirement obligations 43 43
Embedded conversion features derivative liability 21 43
Deferred taxes 17 16
Deferred consideration on disposed businesses 14 24
Environmental liabilities 12 12
Other 28 25
Total $ 239 $ 268