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Note 8 - Summary of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Summary Of Other Long Term Liabilities [Abstract]    
Workers' compensation $ 83 $ 96
Asset retirement obligations 48 43
Deferred taxes 14 16
Environmental liabilities 10 12
Deferred consideration on disposed businesses   14
Other 24 21
Total $ 179 $ 202