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Note 14 - Commitments, Contingencies and Guarantees (Details Textual)
$ in Millions
12 Months Ended
May 31, 2016
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2016
Jun. 01, 2016
Environmental Litigation [Member]          
Number of Hazardous Waste Sites [Member]   15      
Accrual for Environmental Loss Contingencies, Ending Balance   $ 55 $ 68    
Dow Corning Corporation [Member]          
Equity Method Investment, Ownership Percentage       50.00%  
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 $ 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%      
Uncertain Tax Positions [Member]          
Liability for Uncertainty in Income Taxes, Noncurrent   $ 80      
Financial Standby Letter of Credit [Member]          
Guarantor Obligations, Current Carrying Value   $ 108      
Financial Standby Letter of Credit [Member] | Other Current Liabilities [Member]          
Guarantor Obligations, Current Carrying Value     $ 39