Note 4 - Schedule of Other Long-Term Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other Assets Noncurrent Disclosure [Abstract]
Pension assets	$ 199	$ 173
Estimated workers' compensation recoveries	18	18
Long-term receivables, net of reserve of $4 and $4, respectively	10	11
Series A Preferred Stock embedded conversion option derivative asset	6
Other	25	26
Total	$ 258	$ 228

Estimated insurance recoveries noncurrent.

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