CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Comprehensive income:
Net income	$ 149,941	$ 3,731,831
Other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) arising during the period		(2,906)
Losses reclassified into earnings from other comprehensive income	4,583	28,654
Other comprehensive income – foreign currency:
Currency translation adjustments arising during the period		75
Other comprehensive income	4,583	25,823
Comprehensive income	154,524	3,757,654
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(6,366)	(145,070)
Comprehensive income attributable to controlling interests	148,158	3,612,584
ERPOP [Member]
Comprehensive income:
Net income	149,941	3,731,831
Other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) arising during the period		(2,906)
Losses reclassified into earnings from other comprehensive income	4,583	28,654
Other comprehensive income – foreign currency:
Currency translation adjustments arising during the period		75
Other comprehensive income	4,583	25,823
Comprehensive income	154,524	3,757,654
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(788)	(764)
Comprehensive income attributable to controlling interests	$ 153,736	$ 3,756,890