Stock-based Compensation (Schedule Of Share Based Compensation Stock Options Activity) (Details)	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Vornado stock options
Shares
Options outstanding at beginning of period (in shares) | shares	176,705
Forfeited (in shares) | shares	(1,058)
Expired (in shares) | shares	(17,546)
Options outstanding at end of period (in shares) | shares	158,101
Option exercisable at end of period (in shares) | shares	144,361
Weighted- Average Exercise Price
Options outstanding at beginning of period (in dollars per share) | $ / shares	$ 65.35
Forfeited (in dollars per share) | $ / shares	52.30
Expired (in dollars per share) | $ / shares	64.56
Options outstanding at end of period (in dollars per share) | $ / shares	65.52
Options exercisable at end of period (in dollars per share) | $ / shares	$ 66.78
Weighted- Average Remaining Contractual Term
Options outstanding	4 years 2 months 1 day
Options exercisable	3 years 11 months 26 days
Performance AO LTIP Units
Shares
Options outstanding at beginning of period (in shares) | shares	496,762
Expired (in shares) | shares	(496,762)
Granted (in shares) | shares	14,368,750
Options outstanding at end of period (in shares) | shares	14,368,750
Option exercisable at end of period (in shares) | shares	0
Weighted- Average Exercise Price
Options outstanding at beginning of period (in dollars per share) | $ / shares	$ 62.62
Expired (in dollars per share) | $ / shares	62.62
Granted (in usd per share) | $ / shares	16.87
Options outstanding at end of period (in dollars per share) | $ / shares	16.87
Options exercisable at end of period (in dollars per share) | $ / shares	$ 0
Weighted- Average Remaining Contractual Term
Options outstanding	9 years 6 months
AO LTIP Units
Shares
Options outstanding at beginning of period (in shares) | shares	565,664
Forfeited (in shares) | shares	(3,797)
Expired (in shares) | shares	(20,053)
Options outstanding at end of period (in shares) | shares	541,814
Option exercisable at end of period (in shares) | shares	499,882
Weighted- Average Exercise Price
Options outstanding at beginning of period (in dollars per share) | $ / shares	$ 59.93
Forfeited (in dollars per share) | $ / shares	52.40
Expired (in dollars per share) | $ / shares	59.62
Options outstanding at end of period (in dollars per share) | $ / shares	59.99
Options exercisable at end of period (in dollars per share) | $ / shares	$ 60.63
Weighted- Average Remaining Contractual Term
Options outstanding	5 years 2 months 26 days
Options exercisable	5 years 1 month 28 days