Derivative Instruments And Hedging Activities - Summary of Notional Amounts of Outstanding Cross Currency Swap (Detail) - Currency Swap [Member] - Net Investment Hedging [Member] € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019 EUR (€)	Mar. 31, 2019 USD ($)
1.51% [Member]
Derivative Notional Amount [Abstract]
Nature of Swap	Pay Fixed/Receive Fixed
3-month EURIBOR [Member]
Derivative Notional Amount [Abstract]
Nature of Swap	Pay Floating/Receive Floating
4.13% [Member]
Derivative Notional Amount [Abstract]
Nature of Swap	Pay Fixed/Receive Fixed
3-month U.S. LIBOR [Member]
Derivative Notional Amount [Abstract]
Nature of Swap	Pay Floating/Receive Floating
Cross-Currency Paid [Member]
Derivative Notional Amount [Abstract]
Notional amount | €	€ 1,594.8
Cross-Currency Paid [Member] | 1.51% [Member]
Derivative Notional Amount [Abstract]
Notional amount | €	€ 663.6
Weighted Average Fixed Interest Rate	1.51%	1.51%
Cross-Currency Paid [Member] | 3-month EURIBOR [Member]
Derivative Notional Amount [Abstract]
Notional amount | €	€ 931.2
Weighted Average Floating Interest Rate	Based on 3-month EURIBOR
Currency Received [Member]
Derivative Notional Amount [Abstract]
Notional amount | $		$ 1,830.0
Currency Received [Member] | 4.13% [Member]
Derivative Notional Amount [Abstract]
Notional amount | $		$ 750.0
Weighted Average Fixed Interest Rate	4.13%	4.13%
Currency Received [Member] | 3-month U.S. LIBOR [Member]
Derivative Notional Amount [Abstract]
Notional amount | $		$ 1,080.0
Weighted Average Floating Interest Rate	Based on 3-month USD LIBOR