Fair Value Measurements - Credit Ratings (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] | ||
| Debt securities, held-to-maturity | $ 0.0 | $ 50.6 |
| AA+ | ||
| Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] | ||
| Debt securities, held-to-maturity | 0.0 | 13.2 |
| AA- | ||
| Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] | ||
| Debt securities, held-to-maturity | 0.0 | 10.5 |
| A | ||
| Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] | ||
| Debt securities, held-to-maturity | 0.0 | 13.1 |
| A- | ||
| Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] | ||
| Debt securities, held-to-maturity | 0.0 | 3.8 |
| BBB+ | ||
| Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] | ||
| Debt securities, held-to-maturity | $ 0.0 | $ 10.0 |