Annual report pursuant to Section 13 and 15(d)

Note 20 - Income Taxes (Details Textual)

v3.20.4
Note 20 - Income Taxes (Details Textual) - USD ($)
$ in Thousands, shares in Millions
 3 Months Ended 12 Months Ended
Dec. 23, 2020
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount       $ 16,000 $ 9,000 $ 27,000  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent       21.00% 21.00% 21.00% 35.00%
Income Tax Reconciliation, Unrealized Currency Exchange Gains and Losses       $ (0) $ (5,000) $ (10,000)  
Deferred Tax Assets, Basis Difference in Investment       35,000 199,000    
Income Tax Expense (Benefit) from GILTI Expense Allocations       7,000 7,000 16,000  
Tax Cuts and Jobs Act, Income Tax Expense (Benefit), Total           32,000  
Effective Income Tax Rate Reconciliation, Sale of Foreign Business, Amount       (35,000) 0  
Deferred Tax Assets, Operating Loss Carryforwards, Total       258,000 281,000    
Deferred Tax Assets, Capital Loss Carryforwards       30,000 11,000    
Release of Valuation Allowances in Various Jurisdictions       0 0 132,000  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate       16,000 15,000    
Unrecognized Tax Benefits, Period Increase (Decrease), Total       $ 1,000 (10,000) $ 5,000  
Unrecognized Tax Benefits That Would Impact Income Tax Expense (Benefit) Period (Month)       12 months      
Income Tax, GILTI Blended Tax Rate       13.125%      
Minimum [Member]              
Decrease in Unrecognized Tax Benefits is Reasonably Possible       $ 0      
Maximum [Member]              
Decrease in Unrecognized Tax Benefits is Reasonably Possible       2,000      
Foreign Tax Authority [Member]              
Operating Loss Carryforwards, Total       1,037,000      
Deferred Tax Assets, Operating Loss Carryforwards, Total       240,000      
Operating Loss Carryforwards, Subject to Expiration       119,000      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration       20,000      
Operating Loss Carryforwards, Subject to Expiration and Valuation Allowance       60,000      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration and Valuation Allowance       9,000      
Foreign Tax Authority [Member] | Tax Year 2021 Expiration [Member]              
Operating Loss Carryforwards, Subject to Expiration       57,000      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration       8,000      
Foreign Tax Authority [Member] | Tax Year 2020 Expiration [Member]              
Operating Loss Carryforwards, Subject to Expiration and Valuation Allowance       107,000      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration and Valuation Allowance       17,000      
Foreign Tax Authority [Member] | Tax Year 2019 Expiration [Member]              
Operating Loss Carryforwards, Subject to Expiration and Valuation Allowance         111,000    
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration and Valuation Allowance         16,000    
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member]              
Noncash Tax Expense, Change in Tax Rate         32,000    
Release of Valuation Allowances in Various Jurisdictions     $ 80,000        
Period Carryover of Net Operating Losses (Year)           7 years  
Foreign Tax Authority [Member] | Luxembourg Inland Revenue [Member]              
Operating Loss Carryforwards, Total       472,000      
Deferred Tax Assets, Operating Loss Carryforwards, Total       118,000      
Operating Loss Carryforwards, Valuation Allowance, Total       63,000      
Release of Valuation Allowances in Various Jurisdictions   $ 24,000          
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]              
Release of Valuation Allowances in Various Jurisdictions     $ 15,000        
Domestic Tax Authority [Member]              
Operating Loss Carryforwards, Total       71,000      
Deferred Tax Assets, Operating Loss Carryforwards, Total       15,000      
Deferred Tax Assets, Capital Loss Carryforwards       30,000      
Venator Materials PLC [Member]              
Deferred Tax Assets, Basis Difference in Investment       199,000 199,000    
Unrealizable Built In Capital Loss, Valuation Allowance       46,000 46,000    
Income Tax Benefit Realized, Portion of Deferred Tax Asset Basis Difference in Investment       153,000 153,000    
Deferred Tax Assets, Capital Loss Carryforwards       18,000      
Venator Materials PLC [Member] | AUSTRALIA              
Operating Loss Carryforwards, Valuation Allowance, Total       $ 11,000      
Venator Materials PLC [Member] | SK Capital Partners, LP [Member]              
Equity Method Investment Using Fair Value Option, Number of Shares Sold (in shares) 42.4     42.4      
Huntsman International LLC [Member]              
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount       $ 16,000 $ 9,000 $ 27,000  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent       21.00% 21.00% 21.00%  
Income Tax Reconciliation, Unrealized Currency Exchange Gains and Losses       $ 0 $ (5,000) $ (10,000)  
Deferred Tax Assets, Basis Difference in Investment       35,000 199,000    
Effective Income Tax Rate Reconciliation, Sale of Foreign Business, Amount       (35,000) 0 0  
Deferred Tax Assets, Operating Loss Carryforwards, Total       258,000 281,000    
Deferred Tax Assets, Capital Loss Carryforwards       30,000 11,000    
Release of Valuation Allowances in Various Jurisdictions       $ 0 $ 0 $ 132,000