Debt - Summary of Debt (Detail) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Debt		$ 10,186,149	$ 11,358,826
Debt issue costs and discount, net		(68,160)	(76,056)
Debt, net		10,117,989	11,282,770
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt	[1]	531,419	730,000
Interim Credit Facility [Member]
Debt Instrument [Line Items]
Debt			869,606
Term Loan [Member]
Debt Instrument [Line Items]
Debt		200,000	200,000
Term Loan [Member] | United Kingdom [Member]
Debt Instrument [Line Items]
Debt	[1]	919,660	947,240
Term Loan [Member] | Australia [Member]
Debt Instrument [Line Items]
Debt	[1]	897,840	871,560
2.550% Senior Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt	[1]	525,520	541,280
3.325% Senior Unsecured Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt	[1]	553,350	568,500
0.993% Senior Unsecured Notes due 2026 [Member]
Debt Instrument [Line Items]
Debt	[1]	553,350	568,500
2.500% Senior Unsecured Notes due 2026 [Member]
Debt Instrument [Line Items]
Debt	[1]	656,900	676,600
5.250% Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt		500,000	500,000
5.000% Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Debt		1,400,000	1,400,000
3.692% Senior Unsecured Notes due 2028 [Member]
Debt Instrument [Line Items]
Debt	[1]	788,280	811,920
4.625% Senior Unsecured Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt		900,000	900,000
3.375% Senior Unsecured Notes due 2030 [Member]
Debt Instrument [Line Items]
Debt	[1]	459,830	473,620
3.500% Senior Unsecured Notes due 2031 [Member]
Debt Instrument [Line Items]
Debt		$ 1,300,000	$ 1,300,000

[1] Includes €182 million of Euro-denominated borrowings that reflect the exchange rate at March 31, 2022.