CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Comprehensive income:
Net income	$ 95,365	$ 277,846	$ 699,517	$ 708,402
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period			(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	5,877	5,757	17,275	14,659
Other comprehensive income (loss)	5,877	5,757	16,085	(19,106)
Comprehensive income	101,242	283,603	715,602	689,296
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(4,290)	(10,946)	(39,316)	(27,096)
Comprehensive income attributable to controlling interests	96,952	272,657	676,286	662,200
ERPOP [Member]
Comprehensive income:
Net income	95,365	277,846	699,517	708,402
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period			(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	5,877	5,757	17,275	14,659
Other comprehensive income (loss)	5,877	5,757	16,085	(19,106)
Comprehensive income	101,242	283,603	715,602	689,296
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(703)	(830)	(14,113)	(2,450)
Comprehensive income attributable to controlling interests	$ 100,539	$ 282,773	$ 701,489	$ 686,846