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Note 10 - Commitments and Contingencies (Details Textual)
$ in Millions
9 Months Ended 12 Months Ended
May 31, 2016
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 01, 2016
Environmental Litigation [Member]        
Number of Hazardous Waste Sites   19    
Accrual for Environmental Loss Contingencies, Ending Balance   $ 111 $ 55  
Dow Corning Corporation [Member] | Dow Corning Chapter 11 Related Matters [Member]        
Equity Method Investment, Ownership Percentage       50.00%
Indemnification of Excess Liability 50.00%      
Dow Corning Corporation [Member] | Dow Corning Breast Implant Litigation [Member]        
Indemnification of Excess Liability   50.00%    
Litigation Settlement, Expense     1,800  
Loss Contingency Accrual, Ending Balance $ 290 $ 87 $ 130  
Dow Corning Corporation [Member] | Dow Corning Bankruptcy Pendency Interest Claims [Member]        
Loss Contingency Accrual, Ending Balance $ 107      
Dow Corning Corporation [Member] | Dow Corning Environmental Claims [Member]        
Indemnification of Excess Liability   50.00%