Fair Value Measurement of Assets and Liabilities - Schedule of Fair Value Measurement of Asset and Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives Not Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	$ 0.0	$ 0.8
Foreign Exchange Forward [Member] | Derivatives Not Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term		1.8
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	46.7	141.6
Contingent payments related to acquisitions	102.2	180.7
Total Liabilities	236.7	356.1
Fair Value, Measurements, Recurring [Member] | Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	46.7	141.6
Total Liabilities	134.5	175.4
Fair Value, Measurements, Recurring [Member] | Fair Value Measurements at Reporting Date Using: Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent payments related to acquisitions	102.2	180.7
Total Liabilities	102.2	180.7
Fair Value, Measurements, Recurring [Member] | Cross-currency Interest Rate Swaps [Member] | Derivatives Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	28.6	50.3
Derivatives, current and long-term	9.4	14.2
Fair Value, Measurements, Recurring [Member] | Cross-currency Interest Rate Swaps [Member] | Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Derivatives Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	28.6	50.3
Derivatives, current and long-term	9.4	14.2
Fair Value, Measurements, Recurring [Member] | Interest Rate Swaps [Member] | Derivatives Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	115.0	158.6
Fair Value, Measurements, Recurring [Member] | Interest Rate Swaps [Member] | Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Derivatives Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	115.0	158.6
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member] | Derivatives Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	18.1	89.5
Derivatives, current and long-term	10.1	1.8
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member] | Derivatives Not Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term		1.8
Derivatives, current and long-term		0.8
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member] | Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Derivatives Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term	18.1	89.5
Derivatives, current and long-term	$ 10.1	1.8
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member] | Fair Value Measurements at Reporting Date Using: Significant Other Observable Inputs (Level 2) [Member] | Derivatives Not Designated as Hedges [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, current and long-term		1.8
Derivatives, current and long-term		$ 0.8