SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) $ / shares in Units, $ in Billions	1 Months Ended			12 Months Ended
	Jan. 31, 2026 USD ($)	Feb. 28, 2025 USD ($)	Jan. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) $ / shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 CAD ($)	Jun. 30, 2025 USD ($)
Debt Instrument [Line Items]
Interest				$ 612,246,000	$ 602,835,000	$ 574,112,000
Debt issuance costs, net				81,529,000	92,365,000
Amortization of debt issuance costs				29,600,000	28,900,000	23,200,000
Gain on extinguishment of debt, net				(172,000)	(687,000)	6,104,000
Long-term debt, gross				$ 13,103,627,000	13,618,802,000
Unsecured Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				0.775%
3.75% Exchangeable Senior Notes due 2026
Debt Instrument [Line Items]
Senior notes				$ 862,500,000	862,500,000
Interest				$ 32,300,000	32,300,000	17,800,000
Debt instrument, effective interest rate				4.62%			4.62%
Unamortized discount (premium) and debt issuance costs, net				$ 3,100,000	10,300,000
Amortization of debt issuance costs				$ 7,200,000	6,800,000	$ 3,600,000
Debt Instrument, Exchangeable, Exchange Rate Per One Thousand Dollars				18.2778			18.2778
Debt Instrument, Exchangeable, Exchange Price Per Share | $ / shares				$ 54.71
Debt Instrument, Exchangeable, Exchange Rate Adjustment, Quarterly Dividend Threshold Per Share | $ / shares				$ 0.45
Interest rate				3.75%			3.75%
2.65% Senior Notes due 2025
Debt Instrument [Line Items]
Senior notes				$ 0	450,000,000
Interest rate				2.65%			2.65%
Repayments of Senior Debt			$ 450,000,000.0
3.50% Senior Notes due 2025
Debt Instrument [Line Items]
Senior notes				$ 0	600,000,000
Interest rate				3.50%			3.50%
Repayments of Senior Debt		$ 600,000,000.0
5.10% Senior Notes due 2032
Debt Instrument [Line Items]
Senior notes				$ 500,000,000	0			$ 500,000,000.0
Interest rate								5.10%
5.00% Senior Notes due 2036
Debt Instrument [Line Items]
Senior notes				$ 500,000,000.0	$ 0
Interest rate				5.00%			5.00%
4.13% Senior Notes due 2026
Debt Instrument [Line Items]
Interest rate				4.13%			4.13%
4.13% Senior Notes due 2026 | Subsequent Event
Debt Instrument [Line Items]
Repayments of Senior Debt	$ 500,000,000.0
Ventas Realty Limited Partnership | Senior Notes
Debt Instrument [Line Items]
Senior notes				$ 8,200,000,000
Nationwide Health Properties, LLC | Senior Notes
Debt Instrument [Line Items]
Senior notes				$ 73,800,000
Ventas Canada Finance Limited | Senior Notes
Debt Instrument [Line Items]
Senior notes							$ 2.0