Debt - Additional Information (Detail) $ in Thousands, £ in Millions			12 Months Ended
		Feb. 13, 2025	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 GBP (£)	Dec. 05, 2023
Debt Instrument [Line Items]
Debt refinancing and unutilized financing costs			$ 3,629	$ 4,292	$ (285)
Principal amount			$ 9,830,872	$ 8,919,219
Accelerated amortization debt issue costs					$ 800
0.993% Senior Unsecured Notes due 2026 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate			0.993%	0.993%
Debt instrument maturity year			2026
Principal amount	[1]		$ 587,300	$ 517,700
Senior unsecured notes, interest rate			0.993%	0.993%
3.500% Senior Unsecured Notes due 2031 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate			3.50%	3.50%
Principal amount			$ 1,300,000	$ 1,300,000
Senior unsecured notes, interest rate			3.50%	3.50%
2.550% Senior Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate					2.55%		2.55%	2.55%
Gain on prepayment of Debt					$ 1,100	£ 1.1
Principal amount | £							£ 50.0
Senior unsecured notes, interest rate					2.55%		2.55%	2.55%
3.692% Senior Unsecured Notes due 2028 [Member]
Debt Instrument [Line Items]
Senior unsecured notes, interest rate			3.692%	3.692%
Principal amount	[1]		$ 808,500	$ 750,960
Senior unsecured notes, interest rate			3.692%	3.692%
3.325% of Senior Unsecured Notes Due 2025
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		3.325%	3.325%
Debt instrument maturity year		2025	2025
Senior unsecured notes, interest rate		3.325%	3.325%
2.500% of Senior Unsecured Notes Due 2026
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		2.50%	2.50%
Debt instrument maturity year		2026	2026
Senior unsecured notes, interest rate		2.50%	2.50%
5.250% of Senior Unsecured Notes Due 2026
Debt Instrument [Line Items]
Senior unsecured notes, interest rate		5.25%	5.25%
Debt instrument maturity year		2026	2026
Senior unsecured notes, interest rate		5.25%	5.25%

[1] Non-U.S. dollar denominated debt that reflects the exchange rates at period-end.