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Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2026 | Dec. 31, 2025
Derivatives, Fair Value [Line Items] |  |
Collateral received | $ 32.0 | $ 26.1
Fair value hedge agreement, notional amount | $ 100.0 |

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