Note 6 - Debt and Capital Leases and Related Maturities and Interest Rates (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Debt Instrument [Line Items]
March 31, 2018	$ 403
Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
March 31, 2018	4
Long-term Debt [Member]
Debt Instrument [Line Items]
March 31, 2018	399
Capital Leases [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
March 31, 2018	3
Capital Leases [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
March 31, 2018	4
Other Debt [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
March 31, 2018	1
Other Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
March 31, 2018	$ 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%
March 31, 2018	$ 393