Note 4 - Schedule of Other Long-Term Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Other Assets Noncurrent Disclosure [Abstract]
Pension assets	$ 104	$ 82
Estimated workers' compensation recoveries	17	17
Long-term receivables, net of reserve of $4 and $4, respectively	13	13
Other	30	32
Total	$ 164	$ 144