CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Comprehensive income
Net income	$ 144,196	$ 217,492	$ 498,297	$ 4,177,723
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	1,709	227	5,216	(4,240)
Losses reclassified into earnings from other comprehensive income	4,768	4,340	14,019	37,262
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the period		214		264
Other comprehensive income	6,477	4,781	19,235	33,286
Comprehensive income	150,673	222,273	517,532	4,211,009
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(6,201)	(9,362)	(20,983)	(164,096)
Comprehensive income attributable to controlling interests	144,472	212,911	496,549	4,046,913
ERPOP [Member]
Comprehensive income
Net income	144,196	217,492	498,297	4,177,723
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	1,709	227	5,216	(4,240)
Losses reclassified into earnings from other comprehensive income	4,768	4,340	14,019	37,262
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the period		214		264
Other comprehensive income	6,477	4,781	19,235	33,286
Comprehensive income	150,673	222,273	517,532	4,211,009
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Comprehensive income attributable to controlling interests	$ 149,872	$ 221,450	$ 515,178	$ 4,208,641