Amount of amortization expense attributable to debt issuance costs.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-3

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) $ / shares in Units, $ in Thousands, $ in Millions		12 Months Ended
	Sep. 06, 2023 USD ($)	Dec. 31, 2023 USD ($) property $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 CAD ($) property	Jul. 31, 2023 USD ($) property	Jun. 30, 2023 property	May 01, 2023 property	Apr. 30, 2023 CAD ($)	Mar. 31, 2023 CAD ($)
Debt Instrument [Line Items]
Interest		$ 574,112	$ 467,557	$ 440,089
Debt issuance costs, net		84,034	63,410
Amortization of debt issuance costs		23,200	18,200	19,700
Loss on extinguishment of debt, net		6,104	(581)	$ (59,299)
Ventas Canada Finance Limited
Debt Instrument [Line Items]
Ownership Interest, Percentage									100.00%
Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount									$ 613.7
Debt instrument, repurchase amount									600.0
Loss on extinguishment of debt, net		$ 8,300
Senior Notes \| 5.398% Senior Notes, Series I due 2028
Debt Instrument [Line Items]
Principal amount of debt									$ 600.0
Interest rate									5.398%
Senior Notes \| 2.80% Senior Notes, Series E due 2024
Debt Instrument [Line Items]
Interest rate		2.80%			2.80%
Debt Instrument, Repurchased Face Amount									$ 527.0
Offering Price, Percentage Of Par Value									0.976
Senior Notes \| 4.125% Senior Notes, Series B due 2024
Debt Instrument [Line Items]
Interest rate		4.125%			4.125%
Debt Instrument, Repurchased Face Amount									$ 86.7
Offering Price, Percentage Of Par Value									0.985
Unsecured Debt \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.925%
3.75% Exchangeable Senior Notes due 2026
Debt Instrument [Line Items]
Senior notes		$ 862,500	$ 0
Interest		17,800
Unamortized discount (premium) and debt issuance costs, net		17,100
Amortization of debt issuance costs		$ 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			$ 93.5	$ 426,800				$ 271.8
Interest rate						5.91%
Number of properties securing debt \| property		140			140	19	14	153
Ventas Realty Limited Partnership \| Senior Notes
Debt Instrument [Line Items]
Senior notes		$ 8,000,000
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					$ 1,600.0
Ventas Realty \| Unsecured Debt
Debt Instrument [Line Items]
Senior notes	$ 200,000
Debt Instrument, Accordion Limit	$ 500,000	$ 1,250,000
Ventas Realty \| Unsecured Debt \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.95%