Debt - Summary of Issuances and Redemptions of Senior Notes (Detail) € in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2021 EUR (€)
February 2032 Senior Notes [Member] | EUR
Debt Instrument [Line Items]
Aggregate Principal	$ 1,639,305	€ 1,350,000
Interest Rate	0.40%	0.40%
Debt Instrument maturity month	2032-02
February 2032 Senior Notes [Member] | EUR | Weighted Average [Member]
Debt Instrument [Line Items]
Interest Rate	0.70%	0.70%
February Two Thousand Forty One Senior Notes | EUR
Debt Instrument [Line Items]
Debt Instrument maturity month	2041-02
February Two Thousand Forty One Senior Notes | EUR | Weighted Average [Member]
Debt Instrument [Line Items]
Interest Rate	0.80%	0.80%
February 2041 Senior Notes [Member] | USD
Debt Instrument [Line Items]
Aggregate Principal	$ 400,000	€ 400,000
Interest Rate	2.10%	2.10%
Debt Instrument maturity month	2031-03
February 2041 Senior Notes [Member] | USD | Weighted Average [Member]
Debt Instrument [Line Items]
Interest Rate	1.60%	1.60%
February 2024 Senior Notes [Member] | EUR
Debt Instrument [Line Items]
Aggregate Principal	$ 715,700	€ 599,514
Interest Rate	3.00%	3.00%
Debt Instrument maturity month	2024-02
February 2024 Senior Notes [Member] | EUR | Weighted Average [Member]
Debt Instrument [Line Items]
Interest Rate	3.40%	3.40%
November 2025 Senior Notes [Member] | USD
Debt Instrument [Line Items]
Aggregate Principal	$ 750,000
Interest Rate	4.70%	4.70%
Debt Instrument maturity month	2025-11
November 2025 Senior Notes [Member] | USD | Weighted Average [Member]
Debt Instrument [Line Items]
Interest Rate	3.80%	3.80%