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Note 13 - Share-based Compensation | 6 Months Ended
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Jun. 30, 2023
Notes to Financial Statements |
Share-Based Payment Arrangement [Text Block] | 13. Share-Based Compensation Total share-based compensation cost was $59 million and $111 million for the three and six months ended June 30, 2023, respectively, and $51 million and $93 million for the three and six months ended June 30, 2022, respectively. Incentive Stock Plans Time-Based Restricted Stock and Restricted Stock Units The following table summarizes the changes in non-vested time-based restricted stock and restricted stock units for the six months ended June 30, 2023:
|  |  |  |  |  | Weighted |
|  | Number |  |  | average |
|  | of shares |  |  | grant-date |
|  | (in thousands) |  |  | fair value |
Non-vested shares and share units as of December 31, 2022 |  |  | 11,299 |  |  | $ | 29.19 |
Granted |  |  | 7,105 |  |  |  | 35.07 |
Vested |  |  | (4,219 | ) |  |  | 23.18 |
Forfeited |  |  | (331 | ) |  |  | 34.10 |
Non-vested shares and share units as of June 30, 2023 |  |  | 13,854 |  |  | $ | 33.92 |
Performance-Based Restricted Stock Units The following table summarizes the changes in non-vested performance-based restricted stock units for the six months ended June 30, 2023:
|  |  |  |  |  | Weighted |
|  | Number |  |  | average |
|  | of shares |  |  | grant-date |
|  | (in thousands) |  |  | fair value |
Non-vested share units as of December 31, 2022 |  |  | 4,696 |  |  | $ | 35.41 |
Granted |  |  | 1,671 |  |  |  | 35.08 |
Vested |  |  | (3,586 | ) |  |  | 33.37 |
Performance adjustments |  |  | (405 | ) |  |  | 36.40 |
Forfeited |  |  | (33 | ) |  |  | 36.18 |
Non-vested share units as of June 30, 2023 |  |  | 2,343 |  |  | $ | 38.62 |
Stock Options The following table summarizes information concerning stock options as of June 30, 2023 and the related activity for the six months ended June 30, 2023:
|  |  |  |  |  |  |  |  |  | Weighted- |  |  |  |  |
|  |  |  |  |  |  |  |  |  | average |  |  |  |  |
|  |  |  |  |  | Weighted- |  |  | remaining |  |  | Aggregate |
|  | Number |  |  | average |  |  | contractual |  |  | intrinsic |
|  | of shares |  |  | exercise |  |  | term |  |  | value |
|  | (in thousands) |  |  | price |  |  | (in years) |  |  | (in thousands) |
Options outstanding as of December 31, 2022 |  |  | 9,665 |  |  | $ | 22.92 |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,782 | ) |  |  | 19.67 |  |  |  |  |  |  |  |  |
Forfeited and expired |  |  | (46 | ) |  |  | 19.65 |  |  |  |  |  |  |  |  |
Options outstanding as of June 30, 2023 |  |  | 7,837 |  |  |  | 23.67 |  |  |  | 5.48 |  |  | $ | 89,074 |
Options vested and exercisable as of June 30, 2023 |  |  | 7,837 |  |  |  | 23.67 |  |  |  | 5.48 |  |  |  | 89,074 |
There were no stock options granted during the six months ended June 30, 2023 or 2022.

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