Income (Loss) Per Share and Per Class A Unit - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net income (loss) attributable to Vornado	$ 27,115	$ (3,626)	$ 888,828	$ 53,658
Preferred share dividends/unit distributions	(15,526)	(15,528)	(46,578)	(46,586)
Net income (loss) attributable to common shareholders/Class A unitholders	11,589	(19,154)	842,250	7,072
Distributions and earnings allocated to unvested participating securities	0	0	0	0
Numerator for basic income (loss) per common share/Class A unit	11,589	(19,154)	842,250	7,072
Impact of assumed conversion of dilutive convertible securities	0	0	1,189	0
Numerator for diluted income (loss) per common share/Class A unit	$ 11,589	$ (19,154)	$ 843,439	$ 7,072
Denominator:
Denominator for basic income (loss) per common share - weighted average shares	192,050,000	190,556,000	191,804,000	190,493,000
Effect of dilutive securities:
Share-based and Unit-based payment awards (in shares)	8,100,000	0	8,000,000	4,980,000
Convertible securities (in shares)	0	0	1,294,000	0
Denominator for diluted income (loss) per common share - weighted average shares and assumed conversions (in shares)	200,150,000	190,556,000	201,098,000	195,473,000
INCOME (LOSS) PER COMMON SHARE/CLASS A UNIT:
Basic (in dollars per share)	$ 0.06	$ (0.10)	$ 4.39	$ 0.04
Diluted (in dollars per share)	$ 0.06	$ (0.10)	$ 4.19	$ 0.04
INCOME (LOSS) PER COMMON SHARE/CLASS A UNIT:
Weighted average common share / class A unit equivalents of excluded dilutive securities due to anti-dilutive effect (in shares)	1,291,000		0
Vornado Realty L.P.
Numerator:
Net income (loss) attributable to Vornado	$ 28,151	$ (5,316)	$ 962,616	$ 54,382
Preferred share dividends/unit distributions	(15,555)	(15,557)	(46,664)	(46,672)
Net income (loss) attributable to common shareholders/Class A unitholders	12,596	(20,873)	915,952	7,710
Distributions and earnings allocated to unvested participating securities	(175)	0	(12,792)	(99)
Numerator for basic income (loss) per common share/Class A unit	12,421	(20,873)	903,160	7,611
Impact of assumed conversion of dilutive convertible securities	0	0	1,189	0
Numerator for diluted income (loss) per common share/Class A unit	$ 12,421	$ (20,873)	$ 904,349	$ 7,611
Denominator:
Denominator for basic income (loss) per Class A unit - weighted average units (in shares)	205,846,000	205,025,000	205,806,000	204,953,000
Effect of dilutive securities:
Share-based and Unit-based payment awards (in shares)	8,100,000	0	8,000,000	4,980,000
Convertible securities (in shares)	0	0	1,294,000	0
Denominator for diluted income (loss) per Class A unit - weighted average shares and assumed conversions (in shares)	213,946,000	205,025,000	215,100,000	209,933,000
INCOME (LOSS) PER COMMON SHARE/CLASS A UNIT:
Basic (in dollars per unit)	$ 0.06	$ (0.10)	$ 4.39	$ 0.04
Diluted (in dollars per unit)	$ 0.06	$ (0.10)	$ 4.20	$ 0.04
Weighted average common share / class A unit equivalents of excluded dilutive securities due to anti-dilutive effect (in shares)	1,291,000		0