CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Comprehensive income:
Net income	$ 328,040	$ 271,481	$ 388,404	$ 604,152
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period		(223)		(1,190)
Losses reclassified into earnings from other comprehensive income	2,334	5,764	4,637	11,398
Other comprehensive income (loss)	2,334	5,541	4,637	10,208
Comprehensive income	330,374	277,022	393,041	614,360
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(11,732)	(10,792)	(14,641)	(35,026)
Comprehensive income attributable to controlling interests	318,642	266,230	378,400	579,334
ERPOP [Member]
Comprehensive income:
Net income	328,040	271,481	388,404	604,152
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period		(223)		(1,190)
Losses reclassified into earnings from other comprehensive income	2,334	5,764	4,637	11,398
Other comprehensive income (loss)	2,334	5,541	4,637	10,208
Comprehensive income	330,374	277,022	393,041	614,360
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(741)	(880)	(1,423)	(13,410)
Comprehensive income attributable to controlling interests	$ 329,633	$ 276,142	$ 391,618	$ 600,950