Note 1 - Basis of Presentation - Disposal of Assets and Purchase of Property and Equipment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Proceeds from sale of assets	$ (2)
Proceeds from Repack	(12)	(1)
Net book value of assets disposed	2
Other	2
Total	(10)	(1)
Recurring purchases - operations	9	4
Repack	9	2
Total	$ 18	$ 6