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Note 9 - Fair Value (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
  

March 31, 2023

  

December 31, 2022

 
  

Carrying

  

Estimated

  

Carrying

  

Estimated

 
  

value

  

fair value

  

value

  

fair value

 

Non-qualified employee benefit plan investments

 $14  $14  $15  $15 

Investment in Venator

  4   4   5   5 

Option agreement for remaining Venator shares

            

Long-term debt (including current portion)

  (1,520)  (1,418)  (1,737)  (1,578)