Leases - Summary of Lease Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Lessee Lease Description [Line Items]
Operating lease right-of-use assets	$ 80.6	$ 73.8
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Operating lease right-of-use assets	Operating lease right-of-use assets
Lease liabilities:
Lease liabilities	$ 83.4
Operating Lease Liabilities [Member]
Lease liabilities:
Lease liabilities	20.4	$ 19.2
Long-term Operating Lease Liabilities [Member]
Lease liabilities:
Lease liabilities	$ 63.0	$ 56.7