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Note 5 - Summary of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Summary Of Other Long Term Liabilities [Abstract]    
Workers compensation $ 87 $ 96
Asset retirement obligations 49 43
Deferred taxes 13 16
Environmental liabilities 11 12
Deferred consideration on disposed businesses   14
Other 23 21
Total $ 183 $ 202