Note 8 - Debt and Finance Leases and Related Maturities and Interest Rates (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Carrying Value	$ 19	$ 111
Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	2	2
Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	$ 17	109
RED-Rochester, LLC [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2033
Weighted-Average Effective Interest Rate	11.46%
Carrying Value	$ 1	1
RED-Rochester, LLC [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2033
Weighted-Average Effective Interest Rate	11.46%
Carrying Value	$ 12	13
Finance leases [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	1	1
Finance leases [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	$ 3	4
Convertible Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2021
Weighted-Average Effective Interest Rate	11.72%
Carrying Value		91
Other Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	$ 2	$ 1