Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Unrecognized Tax Benefits
Balance at beginning of year	$ 6.6	$ 5.0	$ 4.5
Additions based on current period tax positions	0.0	0.4	0.5
Additions based on prior period tax positions	3.3	3.9	0.2
Reductions as a result of a lapse in the statute of limitations	(2.0)	(2.7)	(0.2)
Reductions as a result of audit/other settlements	(1.7)	0.0	0.0
Balance at end of year	$ 6.2	$ 6.6	$ 5.0