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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 28, 2026 USD ($)	Sep. 30, 2026 USD ($) boardMember property	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) boardMember property	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Equity method investments
Total Investments in unconsolidated real estate entities		$ 584,905		$ 584,905		$ 617,571
Ownership percentage, threshold (may have less than)		100.00%		100.00%
Number of real estate properties sold \| property		1,454		1,454
Ventas Fund
Equity method investments
Value of assets acquired				$ 172,500
Senior Housing Communities \| Pension Fund Joint Venture
Equity method investments
Number of real estate properties sold \| property		1		1
Proceeds from real estate disposals				$ 37,800
Senior Housing Communities \| Pension Fund Joint Venture \| Subsequent Event
Equity method investments
Proceeds from real estate disposals	$ 142,000
Senior Housing Community \| Ventas Fund
Equity method investments
Number of real estate properties acquired \| property				3
Management Service
Equity method investments
Management fees		$ 3,700	$ 4,000	$ 11,900	$ 11,300
Atria
Equity method investments
Ownership percentage		34.00%		34.00%
Number of board members appointed \| boardMember		2		2
Ardent
Equity method investments
Ownership percentage		6.70%		6.70%
Equity method investment, total voting power		4.00%		4.00%
Number of board members nominated \| boardMember		1		1
Unconsolidated Properties \| Ventas Fund
Equity method investments
Total Investments in unconsolidated real estate entities		$ 302,091		$ 302,091		$ 288,469
Ownership percentage		20.10%		20.10%		20.10%
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Total Investments in unconsolidated real estate entities		$ 5,151		$ 5,151		$ 6,200
Ownership percentage		25.00%		25.00%		25.00%
Unconsolidated Properties \| Research & Innovation Development Joint Ventures
Equity method investments
Total Investments in unconsolidated real estate entities		$ 240,220		$ 240,220		$ 282,512
Ownership percentage		53.00%		53.00%		53.00%
Unconsolidated Properties \| Ventas Investment Management platform
Equity method investments
Total Investments in unconsolidated real estate entities		$ 547,462		$ 547,462		$ 577,181
Unconsolidated Properties \| Atrium Health And Wake Forest Joint Venture
Equity method investments
Total Investments in unconsolidated real estate entities		$ 36,877		$ 36,877		$ 39,809
Ownership percentage		51.00%		51.00%		51.00%
Unconsolidated Properties \| All other
Equity method investments
Total Investments in unconsolidated real estate entities		$ 566		$ 566		$ 581
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%