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Note 7 - Debt and Finance Leases and Related Maturities and Interest Rates (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Carrying Value $ 106 $ 401
Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
Carrying Value 2 396
Long-term Debt [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 104 5
Term Note [Member] | Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
Maturity 2019  
Carrying Value   394
Finance leases [Member] | Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 1 2
Finance leases [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
Carrying Value 3 3
Other Debt [Member] | Current Portion, Long-term Debt [Member]    
Debt Instrument [Line Items]    
Carrying Value 1  
Other Debt [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
Carrying Value $ 2 $ 2
Convertible Debt [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
Maturity 2021  
Weighted-Average Effective Interest Rate 11.72%  
Carrying Value $ 85  
RED-Rochester, LLC [Member] | Long-term Debt [Member]    
Debt Instrument [Line Items]    
Maturity 2033  
Weighted-Average Effective Interest Rate 11.40%  
Carrying Value $ 14