Financial Highlights - Summary of Financial Highlights (Parenthetical) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Outstanding debt	$ 1,514.0	$ 1,061.3

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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