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Note 10 - Guarantees (Details) - Change in Accrued Warranty Obligations - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Change in Accrued Warranty Obligations [Abstract]    
Accrued warranty obligations $ 5 $ 13
Actual warranty experience (8) (16)
Warranty provisions 7 8
Accrued warranty obligations $ 4 $ 5