Supplemental Financial Statement Information - Operating Lease Information (Detail) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Leases [Abstract] | ||
| Fair Value of Assets (Liability), Right of use assets | $ 27.3 | $ 33.4 |
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Other noncurrent assets | Other noncurrent assets |
| Fair Value of Assets (Liability), Total lease liabilities | $ 6.3 | $ 7.6 |
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accrued and other liabilities | Accrued and other liabilities |
| Fair Value of Assets (Liability), Total lease liabilities | $ 28.8 | $ 31.7 |
| Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other noncurrent liabilities | Other noncurrent liabilities |
| Fair Value of Assets (Liability), Total lease liabilities | $ 35.1 | $ 39.3 |