Summary of Significant Accounting Policies - Fair Value Measurement (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Assets and liabilities measured at fair value | ||
| Equity securities | $ 42.3 | $ 19.9 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | ||
| Assets and liabilities measured at fair value | ||
| Estimated fair value of marketable securities | 12.9 | |
| Equity securities | 42.3 | |
| Significant Other Observable Inputs (Level 2) | ||
| Assets and liabilities measured at fair value | ||
| Estimated fair value of long-term debt | 747.6 | |
| Estimated fair value of marketable securities | $ 266.2 |
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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