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Note 10 - Change in Accrued Warranty Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Change In Accrued Warranty Obligations [Abstract]    
Accrued warranty obligations $ 4 $ 12
Actual warranty experience (6) (14)
Warranty provisions 5 6
Accrued warranty obligations $ 3 $ 4