Derivative Instruments and Hedging Activities - Net Investment Hedge Gains (Losses) Recognized on Condensed Consolidated Statements of Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in AOCI	$ 49.2	$ 137.9
Euro Notes [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in AOCI	36.9	72.3
Cross-currency Interest Rate Swaps [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in AOCI	$ 12.3	$ 65.6