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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) property board_member	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) property board_member	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Equity method investments
Total investments in unconsolidated real estate entities	$ 653,328		$ 653,328		$ 626,122
Ownership percentage, threshold (may have less than)	100.00%		100.00%
Number of real estate properties sold \| property	1,371		1,371
Proceeds from real estate disposals			$ 158,769	$ 275,396
Ventas Fund
Equity method investments
Value of assets acquired			$ 279,500
Senior Housing Communities \| Pension Fund Joint Venture
Equity method investments
Number of real estate properties sold \| property	5		5
Proceeds from real estate disposals			$ 302,500
Senior Housing Community \| Ventas Fund
Equity method investments
Number of real estate properties acquired \| property			3
Outpatient Medical Buildings \| Ventas Fund
Equity method investments
Number of real estate properties acquired \| property			2
Management Service
Equity method investments
Management fees	$ 4,000	$ 4,000	$ 11,900	$ 11,700
Atria
Equity method investments
Ownership percentage	34.00%		34.00%
Number of board members appointed \| board_member	2		2
Ardent
Equity method investments
Ownership percentage	6.60%		6.60%
Equity method investment, total voting power	4.00%		4.00%
Number of board members nominated \| board_member	1		1
Unconsolidated Properties \| Ventas Fund
Equity method investments
Total investments in unconsolidated real estate entities	$ 282,513		$ 282,513		$ 267,202
Ownership percentage	20.00%		20.00%		20.00%
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Total investments in unconsolidated real estate entities	$ 36,973		$ 36,973		$ 11,939
Ownership percentage	25.00%		25.00%		25.00%
Unconsolidated Properties \| Research & Innovation Development Joint Venture
Equity method investments
Total investments in unconsolidated real estate entities	$ 292,551		$ 292,551		$ 309,499
Ownership percentage	53.00%		53.00%		53.00%
Unconsolidated Properties \| Ventas Investment Management platform
Equity method investments
Total investments in unconsolidated real estate entities	$ 612,037		$ 612,037		$ 588,640
Unconsolidated Properties \| Atrium Health And Wake Forest Joint Venture
Equity method investments
Total investments in unconsolidated real estate entities	$ 40,706		$ 40,706		$ 36,881
Ownership percentage	51.00%		51.00%		48.50%
Unconsolidated Properties \| All other
Equity method investments
Total investments in unconsolidated real estate entities	$ 585		$ 585		$ 601
Unconsolidated Properties \| All other \| Minimum
Equity method investments
Ownership percentage	34.00%		34.00%		34.00%
Unconsolidated Properties \| All other \| Maximum
Equity method investments
Ownership percentage	37.50%		37.50%		37.50%