CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Comprehensive income:
Net income	$ 447,332	$ 95,365	$ 835,736	$ 699,517
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period				(1,190)
Losses reclassified into earnings from other comprehensive income	2,363	5,877	7,000	17,275
Other comprehensive income (loss)	2,363	5,877	7,000	16,085
Comprehensive income	449,695	101,242	842,736	715,602
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(15,459)	(4,290)	(30,100)	(39,316)
Comprehensive income attributable to controlling interests	434,236	96,952	812,636	676,286
ERPOP [Member]
Comprehensive income:
Net income	447,332	95,365	835,736	699,517
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period				(1,190)
Losses reclassified into earnings from other comprehensive income	2,363	5,877	7,000	17,275
Other comprehensive income (loss)	2,363	5,877	7,000	16,085
Comprehensive income	449,695	101,242	842,736	715,602
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(534)	(703)	(1,957)	(14,113)
Comprehensive income attributable to controlling interests	$ 449,161	$ 100,539	$ 840,779	$ 701,489