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SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) $ / shares in Units, $ in Thousands, $ in Millions		1 Months Ended					12 Months Ended
	Sep. 06, 2023 USD ($)	Feb. 13, 2025 USD ($)	Jan. 31, 2025 USD ($)	May 02, 2024 USD ($)	Apr. 30, 2024 USD ($)	Apr. 30, 2024 CAD ($)	Dec. 31, 2024 USD ($) property $ / shares	Dec. 31, 2024 CAD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 CAD ($) property	Sep. 27, 2024 USD ($)	Sep. 27, 2024 CAD ($)	Sep. 05, 2024 USD ($)	May 13, 2024 USD ($)	May 09, 2024 USD ($) property	Apr. 29, 2024 USD ($) property	Apr. 29, 2024 CAD ($) property	Feb. 29, 2024 USD ($) property	Feb. 29, 2024 CAD ($) property
Debt Instrument [Line Items]
Interest							$ 602,835		$ 574,112	$ 467,557
Debt issuance costs, net							92,365		84,034
Amortization of debt issuance costs							28,900		23,200	18,200
Loss on extinguishment of debt, net							(687)		6,104	$ (581)
At The Market Equity Offering Program, Unsettled Forward Sales Agreement
Debt Instrument [Line Items]
Equity Offering Program, Maximum Authorized Offering Amount							$ 3,400
At The Market Equity Offering Program, Unsettled Forward Sales Agreement \| Subsequent Event
Debt Instrument [Line Items]
Equity Offering Program, Maximum Authorized Offering Amount			$ 800
Senior Notes
Debt Instrument [Line Items]
Repayments of Senior Debt				$ 800,000
Senior Notes \| 2.80% Senior Notes, Series E due 2024
Debt Instrument [Line Items]
Interest rate							2.80%				2.80%
Senior Notes \| 4.125% Senior Notes, Series B due 2024
Debt Instrument [Line Items]
Interest rate							4.125%				4.125%
Senior Notes \| 5.100% Senior Notes, Series J due 2029
Debt Instrument [Line Items]
Principal amount of debt																			$ 478,300	$ 650.0
Senior Notes \| 5.63% Senior Notes due 2034
Debt Instrument [Line Items]
Principal amount of debt															$ 500,000
Senior Notes \| 5.00% Senior Notes due 2035
Debt Instrument [Line Items]
Principal amount of debt														$ 550,000
Senior Notes \| 4.125% Senior Notes due 2026
Debt Instrument [Line Items]
Principal amount of debt												$ 120,800	$ 163.3
Unsecured Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							0.775%	0.775%
Unsecured Debt \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							0.10%	0.10%
3.75% Exchangeable Senior Notes due 2026
Debt Instrument [Line Items]
Senior notes							$ 862,500		862,500
Interest							$ 32,300		17,800
Debt instrument, effective interest rate							4.62%				4.62%
Unamortized discount (premium) and debt issuance costs, net							$ 10,300		17,100
Amortization of debt issuance costs							$ 6,800		3,600
Debt Instrument, Exchangeable, Exchange Rate Per One Thousand Dollars							18.2460				18.2460
Debt Instrument, Exchangeable, Exchange Price Per Share \| $ / shares							$ 54.81
Debt Instrument, Exchangeable, Exchange Rate Adjustment, Quarterly Dividend Threshold Per Share \| $ / shares							$ 0.45
Interest rate							3.75%				3.75%
Mortgage loans and other
Debt Instrument [Line Items]
Principal amount of debt							$ 3,200,000									$ 52,300	$ 75,500	$ 103.0	$ 39,100	$ 52.8
Interest rate																6.02%	4.90%	4.90%	4.644%	4.644%
Number of properties securing debt \| property							140				140					1	2	2	1	1
5.100% Senior Notes, Series J due 2029
Debt Instrument [Line Items]
Senior notes							$ 452,017		0
Interest rate							5.10%				5.10%								5.10%	5.10%
Unsecured Term Loan due 2025
Debt Instrument [Line Items]
Extinguishment of debt							$ 369,400	$ 500.0
3.50% Senior Notes due 2024
Debt Instrument [Line Items]
Senior notes							$ 0		400,000
Interest rate							3.50%				3.50%
Repayments of Senior Debt				400,000
3.75% Senior Notes due 2024
Debt Instrument [Line Items]
Senior notes							$ 0		400,000
Interest rate							3.75%				3.75%
Repayments of Senior Debt				$ 400,000
2.80% Senior Notes, Series E due 2024
Debt Instrument [Line Items]
Senior notes							$ 0		55,143
Interest rate							2.80%				2.80%
Repayments of Senior Debt					$ 53,400	$ 73.0
5.63% Senior Notes due 2034
Debt Instrument [Line Items]
Senior notes							$ 500,000		0
Interest rate							5.625%				5.625%				5.625%
5.00% Senior Notes due 2035
Debt Instrument [Line Items]
Senior notes							$ 550,000		0
Interest rate							5.00%				5.00%			5.00%
4.125% Senior Notes due 2026
Debt Instrument [Line Items]
Senior notes							$ 500,000		500,000
Interest rate							4.125%				4.125%	4.125%	4.125%
2.65% Senior Notes due 2025
Debt Instrument [Line Items]
Senior notes							$ 450,000		450,000
Interest rate							2.65%				2.65%
2.65% Senior Notes due 2025 \| Subsequent Event
Debt Instrument [Line Items]
Repayments of Senior Debt			$ 450,000
3.50% Senior Notes due 2025
Debt Instrument [Line Items]
Senior notes							$ 600,000		$ 600,000
Interest rate							3.50%				3.50%
3.50% Senior Notes due 2025 \| Subsequent Event
Debt Instrument [Line Items]
Repayments of Senior Debt		$ 600,000
Ventas Realty Limited Partnership \| Senior Notes
Debt Instrument [Line Items]
Senior notes							$ 8,300,000
Nationwide Health Properties, LLC \| Senior Notes
Debt Instrument [Line Items]
Senior notes							73,800
Ventas Canada Finance Limited \| Senior Notes
Debt Instrument [Line Items]
Senior notes											$ 2,000.0
Ventas Realty \| Unsecured Debt
Debt Instrument [Line Items]
Senior notes	$ 200,000
Debt instrument, basis spread on variable rate	0.85%
Debt Instrument, Accordion Limit	$ 500,000						$ 1,250,000