Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Business Dispositions (Details Textual)

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Note 4 - Business Dispositions (Details Textual) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2020
Dec. 23, 2020
Equity Securities, FV-NI, Unrealized Gain (Loss), Total $ (2) $ (19)    
Venator Materials PLC [Member]        
Equity Securities, FV-NI, Unrealized Gain (Loss), Total $ (2) $ (19)    
Venator Materials PLC [Member] | SK Capital Partners, LP [Member]        
Equity Method Investment Using Fair Value Option, Number of Shares Sold (in shares)     42.4  
Equity Securities Held for Which There Exists an Option for Another Party to Purchase (in shares)       9.7
Equity Securities Held for Which There Exists an Option for Another Party to Purchase, Price Per Share (in dollars per share)       $ 2.15