Annual report [Section 13 and 15(d), not S-K Item 405]

Basis of Presentation - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash for Balance Sheets and Cash Flows (Detail)

v3.25.4
Basis of Presentation - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash for Balance Sheets and Cash Flows (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash, Cash Equivalents and Restricted Cash [Line Items]        
Cash and cash equivalents $ 353.1 $ 415.3    
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows 375.3 438.1 $ 595.5 $ 516.3
Prepaid expenses and other current assets [Member]        
Cash, Cash Equivalents and Restricted Cash [Line Items]        
Restricted cash 3.2 4.3    
Other Assets [Member]        
Cash, Cash Equivalents and Restricted Cash [Line Items]        
Restricted cash $ 19.0 $ 18.5