Debt - Summary of Debt (Parenthetical) (Detail)		Sep. 30, 2020	Dec. 31, 2019	Jul. 26, 2019
4.000% Senior Unsecured Notes due 2022 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate	[1]	4.00%	4.00%
2.550% Senior Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate	[1]	2.55%	2.55%
5.500% Senior Unsecured Notes Due 2024 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		5.50%	5.50%
6.375% Senior Unsecured Notes due 2024 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		6.375%	6.375%
5.250% Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		5.25%	5.25%
3.325% Senior Unsecured Notes Due 2025 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate	[1]	3.325%	3.325%
5.000% Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		5.00%	5.00%
3.692% Senior Unsecured Notes due 2028 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate	[1]	3.692%	3.692%
4.625% Senior Unsecured Notes Due 2029 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		4.625%	4.625%	4.625%

[1] Non-U.S. dollar denominated debt that reflects the exchange rate at September 30, 2020 and December 31, 2019, respectively.