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Note 6 - Debt and Capital Leases and Related Maturities and Interest Rates (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
September 30, 2018 $ 401 $ 403
Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
September 30, 2018 396 4
Long-term Debt [Member]    
Debt Instrument [Line Items]    
September 30, 2018 $ 5 399
Term Note [Member] | Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
Debt Instrument Maturity Year 2019  
Longterm Debt Weighted Average Interest Rate 7.35%  
September 30, 2018 $ 393  
Term Note [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
Debt Instrument Maturity Year 2019  
Longterm Debt Weighted Average Interest Rate 7.35%  
September 30, 2018   393
Capital Leases [Member] | Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
September 30, 2018 $ 3 3
Capital Leases [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
September 30, 2018 3 4
Other Debt [Member] | Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
September 30, 2018   1
Other Debt [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
September 30, 2018 $ 2 $ 2