CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock Par Value	Capital in Excess of Par Value	Accumulated Other Comprehensive (Loss) Income	Retained Earnings (Deficit)	Treasury Stock	Total Ventas Stockholders’ Equity	Noncontrolling Interests
Beginning Balance at Dec. 31, 2021	$ 10,945,760	$ 99,838	$ 15,498,956	$ (64,520)	$ (4,679,889)	$ 0	$ 10,854,385	$ 91,375
Increase (decrease) in stockholders' equity
Net (loss) income attributable to common stockholders	(2,428)	0	0	0	(2,428)	0	(2,428)
Net income (loss) attributable to noncontrolling interest	4,881
Net income	2,453
Other comprehensive income (loss)	13,215	0	0	17,211	0	0	17,211	(3,996)
Net change in noncontrolling interests	(42,873)	0	(21,166)	0	0	0	(21,166)	(21,707)
Dividends to common stockholders	(541,585)	0	0	0	(541,585)	0	(541,585)	0
Issuance of common stock for stock plans, restricted stock grants and other	30,802	76	31,273	0	0	(547)	30,802	0
Adjust redeemable OP unitholder interests to current fair value	24,154	0	24,154	0	0	0	24,154	0
Adjustments to Equity, Redemption of Limited Partnership Units	(14)	0	(14)	0	0	0	(14)	0
Ending Balance at Sep. 30, 2022	10,431,912	99,914	15,533,203	(47,309)	(5,223,902)	(547)	10,361,359	70,553
Beginning Balance at Jun. 30, 2022	10,603,394	99,913	15,514,015	(56,355)	(5,044,569)	(408)	10,512,596	90,798
Increase (decrease) in stockholders' equity
Net (loss) income attributable to common stockholders	1,256	0	0	0	1,256	0	1,256
Net income (loss) attributable to noncontrolling interest	1,807							1,807
Net income	3,063
Other comprehensive income (loss)	2,933	0	0	9,046	0	0	9,046	(6,113)
Net change in noncontrolling interests	(30,584)	0	(14,645)	0	0	0	(14,645)	(15,939)
Dividends to common stockholders	(180,589)	0	0	0	(180,589)	0	(180,589)	0
Issuance of common stock for stock plans, restricted stock grants and other	5,963	1	6,101	0	0	(139)	5,963	0
Adjust redeemable OP unitholder interests to current fair value	27,746	0	27,746	0	0	0	27,746	0
Adjustments to Equity, Redemption of Limited Partnership Units	(14)	0	(14)	0	0	0	(14)	0
Ending Balance at Sep. 30, 2022	10,431,912	99,914	15,533,203	(47,309)	(5,223,902)	(547)	10,361,359	70,553
Beginning Balance at Dec. 31, 2022	10,221,677	99,912	15,539,777	(36,800)	(5,449,385)	(536)	10,152,968	68,709
Increase (decrease) in stockholders' equity
Net (loss) income attributable to common stockholders	49,846	0	0	0		0	49,846
Net income (loss) attributable to noncontrolling interest	4,573
Net income	54,419
Other comprehensive income (loss)	32,163	0	0	30,618	0	0	30,618	1,545
Net change in noncontrolling interests	(20,048)	0	(1,781)	0	0	0	(1,781)	(18,267)
Dividends to common stockholders	(541,745)	0	19	0	(541,764)	0	(541,745)	0
Issuance of common stock for stock plans, restricted stock grants and other	123,852	735	136,215	0	0	(13,098)	123,852	0
Adjust redeemable OP unitholder interests to current fair value	3,852	0	3,852	0	0	0	3,852	0
Adjustments to Equity, Redemption of Limited Partnership Units	(51)	0	(51)	0	0	0	(51)	0
Ending Balance at Sep. 30, 2023	9,874,119	100,647	15,678,031	(6,182)	(5,941,303)	(13,634)	9,817,559	56,560
Beginning Balance at Jun. 30, 2023	10,028,444	100,206	15,584,858	(14,552)	(5,688,499)	(13,631)	9,968,382	60,062
Increase (decrease) in stockholders' equity
Net (loss) income attributable to common stockholders	(71,124)	0	0	0	(71,124)	0	(71,124)
Net income (loss) attributable to noncontrolling interest	1,565							1,565
Net income	(69,559)
Other comprehensive income (loss)	7,184	0	0	8,370	0	0	8,370	(1,186)
Net change in noncontrolling interests	(10,518)	0	(6,637)	0	0	0	(6,637)	(3,881)
Dividends to common stockholders	(181,671)	0	9	0	(181,680)	0	(181,671)	0
Issuance of common stock for stock plans, restricted stock grants and other	88,436	441	87,998	0	0	(3)	88,436	0
Adjust redeemable OP unitholder interests to current fair value	11,785	0	11,785	0	0	0	11,785	0
Adjustments to Equity, Redemption of Limited Partnership Units	18	0	18	0	0	0	18	0
Ending Balance at Sep. 30, 2023	$ 9,874,119	$ 100,647	$ 15,678,031	$ (6,182)	$ (5,941,303)	$ (13,634)	$ 9,817,559	$ 56,560