Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on Gross Basis (Detail) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 83.6	$ 119.1
Derivative Liabilities	187.6	154.6
Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		2.6
Foreign Exchange Forward Contracts [Member] | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets		5.2
Foreign Exchange Forward Contracts [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	12.6	18.7
Foreign Exchange Forward Contracts [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesCurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	25.1	24.9
Foreign Exchange Forward Contracts [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesCurrent | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		2.6
Foreign Exchange Forward Contracts [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	9.4	7.9
Foreign Exchange Forward Contracts [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	39.9	50.7
Foreign Exchange Forward Contracts [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets		5.2
Cross-currency Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	4.1
Cross-currency Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesCurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		9.4
Cross-currency Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	4.3	0.0
Cross-currency Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	27.0	29.0
Interest Rate Swap [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets		20.7
Interest Rate Swap [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 148.8	$ 112.4