Note 7 - Income Taxes - Schedule of Unrecognized Tax Benefits Assets (Liabilities) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Balance, Unrecognized tax benefits | $ 34 | $ 38 | $ 74 |
| Lapse of statutes of limitations | (4) | (3) | (1) |
| Decreases for positions taken in prior years | (1) | (4) | (24) |
| Increases for positions taken in current year | 1 | 3 | 3 |
| Refunds from/(payments to) and settlements with taxing authorities | 0 | 0 | (12) |
| Increases/(decreases) for interest and penalties | 0 | 0 | (3) |
| Increases for positions taken in prior years | 0 | 0 | 1 |
| Balance, Unrecognized tax benefits | $ 30 | $ 34 | $ 38 |