Fair Value Measurements - Schedule of Debt and Equity Securities (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Available-for-sale debt securities, cost | $ 12.1 | $ 12.1 |
| Equity securities, cost | 20.0 | 20.0 |
| Total debt and equity securities, cost | 32.1 | 32.1 |
| Available-for-sale debt securities, fair value | 12.3 | 12.3 |
| Equity securities, fair value | 20.0 | 20.0 |
| Total debt and equity securities, fair value | 32.3 | 32.3 |
| Available-for-sale debt securities, gross unrealized gains | 0.2 | 0.2 |
| Available-for-sale debt securities, gross unrealized losses | $ 0.0 | $ 0.0 |
| X | ||||||||||
- Definition Debt Securities, Available-for-Sale and Equity Securities, FV-NI No definition available.
|
| X | ||||||||||
- Definition Debt Securities, Available-for-Sale and Equity Securities, FV-NI, Cost No definition available.
|
| X | ||||||||||
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- References No definition available.
|