SENIOR NOTES PAYABLE AND OTHER DEBT - Summary of Senior Notes Payables and Other Debt (Details) $ in Thousands, £ in Millions, $ in Millions	Jun. 30, 2025 USD ($)	Jun. 30, 2025 CAD ($)	Jun. 30, 2025 GBP (£)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 CAD ($)	Dec. 31, 2024 GBP (£)	Feb. 29, 2024
Debt instruments
Commercial paper notes	$ 0			$ 0
Deferred financing costs, net	(89,502)			(92,365)
Unamortized fair value adjustment	7,832			11,587
Unamortized discounts	(16,892)			(15,473)
Senior notes payable and other debt	13,056,312			13,522,551
Mortgage loans and other	13,154,874			13,618,802
Unsecured revolving credit facility | Revolving Credit Facility
Debt instruments
Fair value of amount outstanding	1,374			6,397
Unsecured revolving credit facility | Revolving Credit Facility | Borrowings Originally Denominated in CAD
Debt instruments
Mortgage loans and other	1,400	$ 0.0		1,400	$ 2.0
Unsecured revolving credit facility | Revolving Credit Facility | Borrowings Originally Denominated in GBP
Debt instruments
Mortgage loans and other	$ 1,400		£ 1.0	5,000		£ 4.0
3.50% Senior Notes due 2025
Debt instruments
Interest rate	3.50%	3.50%	3.50%
Senior notes	$ 0			600,000
2.65% Senior Notes due 2025
Debt instruments
Interest rate	2.65%	2.65%	2.65%
Senior notes	$ 0			450,000
4.125% Senior Notes due 2026
Debt instruments
Interest rate	4.125%	4.125%	4.125%
Senior notes	$ 500,000			500,000
3.25% Senior Notes due 2026
Debt instruments
Interest rate	3.25%	3.25%	3.25%
Senior notes	$ 450,000			450,000
3.75% Exchangeable Senior Notes due 2026
Debt instruments
Interest rate	3.75%	3.75%	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
Interest rate	0.10%	0.10%	0.10%
Unsecured term loan	$ 500,000			500,000
2.45% Senior Notes, Series G Due 2027
Debt instruments
Interest rate	2.45%	2.45%	2.45%
Senior notes	$ 349,085			330,320
3.85% Senior Notes due 2027
Debt instruments
Interest rate	3.85%	3.85%	3.85%
Senior notes	$ 400,000			400,000
4.00% Senior Notes due 2028
Debt instruments
Interest rate	4.00%	4.00%	4.00%
Senior notes	$ 650,000			650,000
5.398% Senior Notes due 2028
Debt instruments
Interest rate	5.398%	5.398%	5.398%
Senior notes	$ 440,950			417,246
4.40% Senior Notes due 2029
Debt instruments
Interest rate	4.40%	4.40%	4.40%
Senior notes	$ 750,000			750,000
5.10% Senior Notes, Series J due 2029
Debt instruments
Interest rate							5.10%
Senior notes	$ 477,695			452,017
3.00% Senior Notes due 2030
Debt instruments
Interest rate	3.00%	3.00%	3.00%
Senior notes	$ 650,000			650,000
4.75% Senior Notes due 2030
Debt instruments
Interest rate	4.75%	4.75%	4.75%
Senior notes	$ 500,000			500,000
2.50% Senior Notes due 2031
Debt instruments
Interest rate	2.50%	2.50%	2.50%
Senior notes	$ 500,000			500,000
3.30% Senior Notes, Series H Due 2031
Debt instruments
Interest rate	3.30%	3.30%	3.30%
Senior notes	$ 220,475			208,623
5.63% Senior Notes due 2034
Debt instruments
Interest rate	5.625%	5.625%	5.625%
Senior notes	$ 500,000			500,000
5.00% Senior Notes due 2035
Debt instruments
Interest rate	5.00%	5.00%	5.00%
Senior notes	$ 550,000			550,000
6.90% Senior Notes due 2037
Debt instruments
Interest rate	6.90%	6.90%	6.90%
Senior notes	$ 52,400			52,400
6.59% Senior Notes due 2038
Debt instruments
Interest rate	6.59%	6.59%	6.59%
Senior notes	$ 21,413			21,413
5.70% Senior Notes due 2043
Debt instruments
Interest rate	5.70%	5.70%	5.70%
Senior notes	$ 300,000			300,000
4.375% Senior Notes due 2045
Debt instruments
Interest rate	4.375%	4.375%	4.375%
Senior notes	$ 300,000			300,000
4.875% Senior Notes due 2049
Debt instruments
Interest rate	4.875%	4.875%	4.875%
Senior notes	$ 300,000			300,000
Mortgage loans and other
Debt instruments
Mortgage loans and other	$ 3,178,982			3,167,886
5.10% Senior Notes due 2032
Debt instruments
Interest rate	5.10%	5.10%	5.10%
Senior notes	$ 500,000			$ 0