Quarterly report [Sections 13 or 15(d)]

Significant Accounting Policies - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash for Balance Sheets and Cash Flows (Detail)

v3.26.1
Significant Accounting Policies - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash for Balance Sheets and Cash Flows (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Cash, Cash Equivalents and Restricted Cash [Line Items]        
Cash and cash equivalents $ 370.5 $ 353.1    
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows 393.4 375.3 $ 343.6 $ 438.1
Prepaid expenses and other current assets [Member]        
Cash, Cash Equivalents and Restricted Cash [Line Items]        
Restricted cash 3.6 3.2    
Other Assets [Member]        
Cash, Cash Equivalents and Restricted Cash [Line Items]        
Restricted cash $ 19.3 $ 19.0