Income (Loss) Per Share/Income (Loss) Per Class A Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Income (loss) from continuing operations, net of (income) loss attributable to noncontrolling interests		$ 175,999	$ (297,005)	$ 3,147,965
Loss from discontinued operations		0	0	(28)
Net income (loss) attributable to Vornado / Vornado Realty L.P.		175,999	(297,005)	3,147,937
Preferred share dividends / unit distributions		(65,880)	(51,739)	(50,131)
Preferred share / unit issuance costs		(9,033)	0	0
NET INCOME (LOSS) attributable to common shareholders / Class A unitholders		101,086	(348,744)	3,097,806
Earnings allocated to unvested participating securities		(34)	(99)	(309)
Numerator for basic income (loss) per share / per Class A unit		101,052	(348,843)	3,097,497
Convertible preferred share dividends / unit distributions		0	0	57
Earnings allocated to Out-Performance Plan units		0	0	9
Numerator for diluted income (loss) per share / per Class A unit		$ 101,052	$ (348,843)	$ 3,097,563
Denominator:
Denominator for basic income (loss) per share - weighted average shares (in shares)		191,551	191,146	190,801
Employee stock options, restricted stock awards, AO LTIP Units and OPPs (in shares)	571		0	218
Convertible preferred shares / units		0	0	34
Denominator for diluted income (loss) per share - weighted average shares and assumed conversions (in shares)		192,122	191,146	191,053
INCOME (LOSS) PER COMMON SHARE - BASIC:
Net income (loss) per common share - Basic (in dollars per share)		$ 0.53	$ (1.83)	$ 16.23
INCOME (LOSS) PER COMMON SHARE - DILUTED:
Net income (loss) per common share - Diluted (in dollars per share)		$ 0.53	$ (1.83)	$ 16.21
Vornado Realty L.P.
Numerator:
Income (loss) from continuing operations, net of (income) loss attributable to noncontrolling interests		$ 183,539	$ (321,951)	$ 3,358,839
Loss from discontinued operations		0	0	(30)
Net income (loss) attributable to Vornado / Vornado Realty L.P.		183,539	(321,951)	3,358,809
Preferred share dividends / unit distributions		(66,035)	(51,904)	(50,296)
Preferred share / unit issuance costs		(9,033)	0	0
NET INCOME (LOSS) attributable to common shareholders / Class A unitholders		108,471	(373,855)	3,308,513
Earnings allocated to unvested participating securities		(2,668)	(5,417)	(17,296)
Numerator for basic income (loss) per share / per Class A unit		105,803	(379,272)	3,291,217
Convertible preferred share dividends / unit distributions		0	0	57
Numerator for diluted income (loss) per share / per Class A unit		$ 105,803	$ (379,272)	$ 3,291,274
Denominator:
Denominator for basic income (loss) per Class A unit - weighted average units and assumed conversions		204,728	203,503	202,947
Employee stock options, restricted stock awards, AO LTIP Units and OPPs (in shares)		916	0	267
Convertible preferred shares / units		0	0	34
Denominator for diluted income per Class A unit - weighted average units		205,644	203,503	203,248
INCOME (LOSS) PER CLASS A UNIT - BASIC:
Net income (loss) per Class A unit (in dollars per share)		$ 0.52	$ (1.86)	$ 16.22
INCOME (LOSS) PER CLASS A UNIT - DILUTED:
Net income (loss) per Class A unit (in dollars per share)		$ 0.51	$ (1.86)	$ 16.19