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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% |  |

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