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Note 16 - Components of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]    
Currency translation adjustments $ (58) $ (67)
Unrealized loss on investments 2 2
Pension and other postretirement benefit plan changes (350) (202)
Ending balance $ (406) $ (267)