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Note 6 - Guarantees (Details)
9 Months Ended
Sep. 30, 2015
USD ($)
Note 6 - Guarantees (Details) [Line Items]  
Environmental Settlement, Historical Liabilities Trigger Amount $ 99,000,000
Percentage of Liability Above $99 Million 50.00%
Orginal Warranty Period 3 months
Amended EBP Settlement Agreement [Member]  
Note 6 - Guarantees (Details) [Line Items]  
Accrual for Environmental Loss Contingencies $ 0
Financial Guarantee [Member] | Guarantor Subsidiaries [Member]  
Note 6 - Guarantees (Details) [Line Items]  
Guarantor Obligations, Maximum Exposure, Undiscounted 19,000,000
Guarantor Obligations, Current Carrying Value $ 7,000,000
Maximum [Member]  
Note 6 - Guarantees (Details) [Line Items]  
Orginal Warranty Period 1 year
Extended Warranty Period 5 years
Minimum [Member]  
Note 6 - Guarantees (Details) [Line Items]  
Extended Warranty Period 3 months