Note 9 - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases	$ 6	$ 19
Financing cash flow for finance leases	1	2
Cash paid for amounts included in measurement of lease liabilities	$ 7	$ 21