Note 7 - Restructuring, Impairment and Plant Closing Costs - Cash and Noncash Restructuring Charges (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Cash charges, net | $ 5 | $ 0 |
| Accelerated depreciation | 1 | 2 |
| Other noncash credits, net | 0 | (1) |
| Total restructuring, impairment and plant closing credits | $ 6 | $ 1 |