Note 1 - Basis of Presentation - Disposal of Assets and Purchase of Property and Equipment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Proceeds from sale of assets	$ (1)	$ (2)
Proceeds from Repack	(6)	(12)
Net book value of assets disposed	1	2
Other	0	2
Total	(6)	(10)
Recurring purchases - operations	21	9
Repack	6	9
Total	$ 27	$ 18