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Note 10 - Guarantees (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
May. 20, 2014
Note 10 - Guarantees (Details) [Line Items]      
Environmental Settlement, Historical Liabilities Trigger Amount $ 99    
Percentage of Liability Above $99 Million 50.00%   50.00%
Orginal Warranty Period 1 year    
Product Warranty Expense $ 135 $ 158  
Amended EBP Settlement Agreement [Member]      
Note 10 - Guarantees (Details) [Line Items]      
Accrual for Environmental Loss Contingencies 0    
Financial Guarantee [Member] | Guarantor Subsidiaries [Member]      
Note 10 - Guarantees (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted 17    
Guarantor Obligations, Current Carrying Value $ 6    
General Period [Member]      
Note 10 - Guarantees (Details) [Line Items]      
Extended Warranty Period 1 year    
Minimum [Member]      
Note 10 - Guarantees (Details) [Line Items]      
Extended Warranty Period 3 months    
Maximum [Member]      
Note 10 - Guarantees (Details) [Line Items]      
Extended Warranty Period 5 years