Note 6 - Debt and Capital Leases and Related Maturities and Interest Rates (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
June 30, 2018	$ 401	$ 403
Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
June 30, 2018	3	4
Long-term Debt [Member]
Debt Instrument [Line Items]
June 30, 2018	398	399
Capital Leases [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
June 30, 2018	3	3
Capital Leases [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
June 30, 2018	3	4
Other Debt [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
June 30, 2018		1
Other Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
June 30, 2018	$ 2	2
Term Note [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year	2019
Longterm Debt Weighted Average Interest Rate	7.34%
June 30, 2018	$ 393	$ 393