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Note 4 - Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Category (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 50 $ 49
Intangible Assets Net 53  
Intangible assets gross 143 168
Intangible assets net 93 119
Trade Names [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 40 46
Technology-Based Intangible Assets [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 75 83
Accumulated Amortization 40 38
Intangible Assets Net $ 35 $ 45
Weighted-Average Amortization Period 3 years 3 years
Customer-Related Intangible Assets [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 26 $ 37
Accumulated Amortization 10 11
Intangible Assets Net $ 16 $ 26
Weighted-Average Amortization Period 6 years 7 years
Other Intangible Assets [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 2 $ 2
Intangible Assets Net $ 2 $ 2
Weighted-Average Amortization Period 20 years 21 years