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Note 9 - Derivative Instruments and Hedging Activities (Details Textual) € in Millions, $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 EUR (€) | Sep. 30, 2024 USD ($) | Sep. 30, 2024 EUR (€)
Gain (Loss) on Derivative Used in Net Investment Hedge, after Tax | $ 4 | $ (44) |  |  |
Foreign Exchange Contract [Member] |  |  |  |  |
Derivative, Maximum Maturity Period (Month) | 3 months |  |  |  |
Derivative, Notional Amount | $ 141 | $ 101 |  |  |
Net Investment Hedge [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Derivative, Notional Amount | 187 |  | € 164 |  |
Cross Currency Interest Rate Contract [Member] |  |  |  |  |
Derivative, Notional Amount |  |  |  | $ 350 | € 315
Derivative Liability | $ 12 |  |  |  |

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