Note 7 - Income Taxes - Schedule of Unrecognized Tax Benefits Assets (Liabilities) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Balance, Unrecognized tax benefits | $ 74 | $ 64 | $ 174 |
| Decreases for positions taken in prior years | (24) | (19) | (96) |
| Refunds from/(payments to) and settlements with taxing authorities | (12) | 0 | (11) |
| Increases for positions taken in current year | 3 | 18 | 20 |
| Increases/(decreases) for interest and penalties | (3) | 5 | (5) |
| Increases for positions taken in prior years | 1 | 7 | 44 |
| Lapse of statutes of limitations | (1) | (1) | (62) |
| Balance, Unrecognized tax benefits | $ 38 | $ 74 | $ 64 |