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Note 19 - Segment Information (Details Textual)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
a
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
a
Segment Reporting Information [Line Items]      
Increase (decrease) in employee benefit reserves $ (1) $ 9 $ (4)
Gross Profit [Member]      
Segment Reporting Information [Line Items]      
Increase (decrease) in employee benefit reserves $ (1) 6 (3)
Selling, General and Administrative Expenses [Member]      
Segment Reporting Information [Line Items]      
Increase (decrease) in employee benefit reserves   2 $ (1)
Research and Development Expense [Member]      
Segment Reporting Information [Line Items]      
Increase (decrease) in employee benefit reserves   $ 1  
Eastman Business Park [Member] | Minimum [Member]      
Segment Reporting Information [Line Items]      
Area of Real Estate Property | a 1,200   1,200