Note 9 - Debt and Finance Leases and Related Maturities and Interest Rates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Carrying Value	$ 111	$ 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	$ 109	5
Term Note [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Weighted-Average Effective Interest Rate	9.43%
Carrying Value		394
RED-Rochester, LLC [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2033
Weighted-Average Effective Interest Rate	11.42%
Carrying Value	$ 1
RED-Rochester, LLC [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2033
Weighted-Average Effective Interest Rate	11.42%
Carrying Value	$ 13
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	$ 4	3
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	$ 1	$ 2