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Note 15 - Environmental, Health and Safety Matters (Details Textual) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Environmental Costs Recognized, Capitalized in Period | $ 20 | $ 27 |
Accrual for Environmental Loss Contingencies | 5 |  | $ 5
Accrued Environmental Loss Contingencies, Current | 1 |  | 1
Accrued Environmental Loss Contingencies, Noncurrent | $ 4 |  | $ 4
Maximum Period for Payment of Remediation Liabilities (Year) | 30 years |  | 30 years
Site Contingency, Number of Former Facility or Third Party Sites with Claims Against Entity for Cleanup Liabilities | 6 |  |

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