CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Comprehensive income:
Net income	$ 228,400	$ 298,618	$ 3,960,231	$ 488,842
Other comprehensive (loss) income – derivative instruments:
Unrealized holding (losses) gains arising during the period	(1,561)	11,676	(4,467)	(112)
Losses reclassified into earnings from other comprehensive income	4,268	4,573	32,922	8,911
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the period	(25)	(82)	50	(502)
Other comprehensive income	2,682	16,167	28,505	8,297
Comprehensive income	231,082	314,785	3,988,736	497,139
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(9,664)	(12,817)	(154,734)	(20,219)
Comprehensive income attributable to controlling interests	221,418	301,968	3,834,002	476,920
ERPOP [Member]
Comprehensive income:
Net income	228,400	298,618	3,960,231	488,842
Other comprehensive (loss) income – derivative instruments:
Unrealized holding (losses) gains arising during the period	(1,561)	11,676	(4,467)	(112)
Losses reclassified into earnings from other comprehensive income	4,268	4,573	32,922	8,911
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the period	(25)	(82)	50	(502)
Other comprehensive income	2,682	16,167	28,505	8,297
Comprehensive income	231,082	314,785	3,988,736	497,139
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(781)	(844)	(1,545)	(1,487)
Comprehensive income attributable to controlling interests	$ 230,301	$ 313,941	$ 3,987,191	$ 495,652