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Note 7 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jun. 17, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2025 | Jun. 08, 2025
Common Stock, Dividends, Per Share, Declared (in dollars per share) |  | $ 0.1 | $ 0.1 | $ 0.1 |  |
Share Repurchase Program Authorized June 8, 2025 [Member] |  |  |  |  |  |
Share Repurchase Program, Authorized, Amount |  |  |  |  |  | $ 1,000
Treasury Stock, Value, Acquired, Cost Method |  | $ 187 |  |  | $ 193 |
Treasury Stock, Shares, Acquired (in shares) |  | 9,519,423 |  |  | 9,840,201 |
Share Repurchase Program, Remaining Authorized, Amount |  | $ 556 |  |  | $ 556 |
Share Repurchase Program Authorized June 8, 2025 [Member] | Icahn Group [Member] |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ 251 |  |  |  |  |
Treasury Stock, Shares, Acquired (in shares) | 14,286,505 |  |  |  |  |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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