Fair Value Measurement of Assets and Liabilities - Schedule of Fair Value Liabilities Measured on Recurring Basis (Detail) - Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member] - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	$ 299.2	$ 180.7
Change in estimates	8.1	1.7
Settlements	$ (73.9)	$ (45.2)
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Acquisition Integration Divestiture And Related Expenses	Acquisition Integration Divestiture And Related Expenses
Foreign currency impact		$ 0.6
Ending balance	$ 233.4	$ 137.7