Derivative Financial Instruments and Fair Value Measurements - Schedule of Changes in Fair Value of Level 3 Investment Assets (Details) - Credit facility investment including accrued interest - USD ($) $ in Millions |
9 Months Ended | |
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Jun. 30, 2026 |
Jun. 30, 2025 |
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| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning Balance | $ 17.4 | $ 21.9 |
| Investment Gains/(Losses) | (0.5) | (0.7) |
| Interest Earned | 1.3 | 0.8 |
| Loans | 12.5 | 8.0 |
| Collections | 0.0 | (24.6) |
| Ending Balance | $ 30.7 | $ 5.4 |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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