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SENIOR NOTES PAYABLE AND OTHER DEBT - Summary of Senior Notes Payables and Other Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Feb. 29, 2024	Dec. 31, 2023
Debt instruments
Commercial paper notes	$ 0		$ 0
Deferred financing costs, net	(82,534)		(84,034)
Unamortized fair value adjustment	15,917		17,081
Unamortized discounts	(10,202)		(10,749)
Senior notes payable and other debt	13,555,194		13,490,896
Mortgage loans and other	13,632,013		13,568,598
Unsecured revolving credit facility \| Revolving Credit Facility
Debt instruments
Fair value of amount outstanding	8,207		14,006
Unsecured revolving credit facility \| Revolving Credit Facility \| Borrowings Originally Denominated in CAD
Debt instruments
Mortgage loans and other	0
Unsecured revolving credit facility \| Revolving Credit Facility \| Borrowings Originally Denominated in GBP
Debt instruments
Mortgage loans and other	$ 8,200		14,000
3.50% Senior Notes due 2024
Debt instruments
Interest rate	3.50%
Senior notes	$ 400,000		400,000
3.75% Senior Notes due 2024
Debt instruments
Interest rate	3.75%
Senior notes	$ 400,000		400,000
4.125% Senior Notes, Series B due 2024
Debt instruments
Interest rate	4.125%
Senior notes	$ 120,597		123,256
2.80% Senior Notes, Series E due 2024
Debt instruments
Interest rate	2.80%
Senior notes	$ 53,954		55,143
Unsecured Term Loan due 2025
Debt instruments
Unsecured term loan	$ 0		377,501
3.50% Senior Notes due 2025
Debt instruments
Interest rate	3.50%
Senior notes	$ 600,000		600,000
2.65% Senior Notes due 2025
Debt instruments
Interest rate	2.65%
Senior notes	$ 450,000		450,000
4.125% Senior Notes due 2026
Debt instruments
Interest rate	4.125%
Senior notes	$ 500,000		500,000
3.25% Senior Notes due 2026
Debt instruments
Interest rate	3.25%
Senior notes	$ 450,000		450,000
3.75% Exchangeable Senior Notes due 2026
Debt instruments
Interest rate	3.75%
Senior notes	$ 862,500		862,500
Unsecured term loan due February 2027
Debt instruments
Unsecured term loan	200,000		200,000
Unsecured term loan due June 2027
Debt instruments
Unsecured term loan	$ 500,000		500,000
2.45% Senior Notes, Series G Due 2027
Debt instruments
Interest rate	2.45%
Senior notes	$ 350,890		358,626
3.85% Senior Notes due 2027
Debt instruments
Interest rate	3.85%
Senior notes	$ 400,000		400,000
4.00% Senior Notes due 2028
Debt instruments
Interest rate	4.00%
Senior notes	$ 650,000		650,000
5.398% Senior Notes due 2028
Debt instruments
Interest rate	5.398%
Senior notes	$ 443,230		453,001
4.40% Senior Notes due 2029
Debt instruments
Interest rate	4.40%
Senior notes	$ 750,000		750,000
5.10% Senior Notes, Series J due 2029
Debt instruments
Interest rate		5.10%
Senior notes	$ 480,165		0
3.00% Senior Notes due 2030
Debt instruments
Interest rate	3.00%
Senior notes	$ 650,000		650,000
4.75% Senior Notes due 2030
Debt instruments
Interest rate	4.75%
Senior notes	$ 500,000		500,000
2.50% Senior Notes due 2031
Debt instruments
Interest rate	2.50%
Senior notes	$ 500,000		500,000
3.30% Senior Notes, Series H Due 2031
Debt instruments
Interest rate	3.30%
Senior notes	$ 221,615		226,501
6.90% Senior Notes due 2037
Debt instruments
Interest rate	6.90%
Senior notes	$ 52,400		52,400
6.59% Senior Notes due 2038
Debt instruments
Interest rate	6.59%
Senior notes	$ 21,413		21,413
5.70% Senior Notes due 2043
Debt instruments
Interest rate	5.70%
Senior notes	$ 300,000		300,000
4.375% Senior Notes due 2045
Debt instruments
Interest rate	4.375%
Senior notes	$ 300,000		300,000
4.875% Senior Notes due 2049
Debt instruments
Interest rate	4.875%
Senior notes	$ 300,000		300,000
Mortgage loans and other
Debt instruments
Mortgage loans and other	$ 3,167,042		$ 3,174,251