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Note 10 - Guarantees (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
May 20, 2014
Guarantee Obligations [Line Items]      
Percentage of Liability Above 99 Million     50.00%
Product Warranty Expense $ 125,000,000 $ 148,000,000  
Maximum [Member]      
Guarantee Obligations [Line Items]      
Environmental Settlement Historical Liabilities Trigger Amount $ 99,000,000    
Percentage of Liability Above 99 Million 50.00%    
Original Warranty Period 1 year    
Extended Warranty Period 5 years    
General Period [Member]      
Guarantee Obligations [Line Items]      
Extended Warranty Period 1 year    
Minimum [Member]      
Guarantee Obligations [Line Items]      
Extended Warranty Period 90 days    
Amended EBP Settlement Agreement [Member]      
Guarantee Obligations [Line Items]      
Accrual for Environmental Loss Contingencies $ 0    
Financial Guarantee [Member] | Guarantor Subsidiaries [Member]      
Guarantee Obligations [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted 17,000,000    
Guarantor Obligations, Current Carrying Value $ 6,000,000