CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Comprehensive income:
Net income	$ 271,481	$ 321,299	$ 604,152	$ 430,556
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	(223)	(19,345)	(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	5,764	4,509	11,398	8,902
Other comprehensive income (loss)	5,541	(14,836)	10,208	(24,863)
Comprehensive income	277,022	306,463	614,360	405,693
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(10,792)	(11,797)	(35,026)	(16,150)
Comprehensive income attributable to controlling interests	266,230	294,666	579,334	389,543
ERPOP [Member]
Comprehensive income:
Net income	271,481	321,299	604,152	430,556
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	(223)	(19,345)	(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	5,764	4,509	11,398	8,902
Other comprehensive income (loss)	5,541	(14,836)	10,208	(24,863)
Comprehensive income	277,022	306,463	614,360	405,693
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(880)	(821)	(13,410)	(1,620)
Comprehensive income attributable to controlling interests	$ 276,142	$ 305,642	$ 600,950	$ 404,073