CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Comprehensive income:
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the year		(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	9,394	35,087	21,188
Other comprehensive income (loss)	9,394	33,897	(12,577)
Comprehensive income	1,406,108	996,398	997,131
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(64,183)	(50,084)	(38,872)
Comprehensive income attributable to controlling interests	1,341,925	946,314	958,259
ERPOP [Member]
Comprehensive income:
Net income	1,396,714	962,501	1,009,708
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the year		(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	9,394	35,087	21,188
Other comprehensive income (loss)	9,394	33,897	(12,577)
Comprehensive income	1,406,108	996,398	997,131
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(17,964)	(14,855)	(3,297)
Comprehensive income attributable to controlling interests	$ 1,388,144	$ 981,543	$ 993,834