10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2017

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 1-12252 (Equity Residential)

Commission File Number: 0-24920 (ERP Operating Limited Partnership)

EQUITY RESIDENTIAL

ERP OPERATING LIMITED PARTNERSHIP

(Exact name of registrant as specified in its charter)

Maryland (Equity Residential)	13-3675988 (Equity Residential)
Illinois (ERP Operating Limited Partnership)	36-3894853 (ERP Operating Limited Partnership)
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
Two North Riverside Plaza, Chicago, Illinois 60606	(312) 474-1300
(Address of principal executive offices) (Zip Code)	(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Equity Residential  Yes ☒  No ☐ ERP Operating Limited Partnership  Yes ☒  No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Equity Residential  Yes ☒  No ☐ ERP Operating Limited Partnership  Yes ☒  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Equity Residential:

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐ (Do not check if a small reporting company)	Small reporting company	☐
Emerging growth company	☐

ERP Operating Limited Partnership:

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒ (Do not check if a small reporting company)	Small reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Equity Residential  ☐ ERP Operating Limited Partnership  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Equity Residential  Yes ☐  No ☒ ERP Operating Limited Partnership  Yes ☐  No ☒

The number of EQR Common Shares of Beneficial Interest, $0.01 par value, outstanding on October 27, 2017 was 367,484,786.

EXPLANATORY NOTE

This report combines the reports on Form 10-Q for the quarterly period ended September 30, 2017 of Equity Residential and ERP Operating Limited Partnership.  Unless stated otherwise or the context otherwise requires, references to “EQR” mean Equity Residential, a Maryland real estate investment trust (“REIT”), and references to “ERPOP” mean ERP Operating Limited Partnership, an Illinois limited partnership.  References to the “Company,” “we,” “us” or “our” mean collectively EQR, ERPOP and those entities/subsidiaries owned or controlled by EQR and/or ERPOP.  References to the “Operating Partnership” mean collectively ERPOP and those entities/subsidiaries owned or controlled by ERPOP.  The following chart illustrates the Company's and the Operating Partnership's corporate structure:

EQR is the general partner of, and as of September 30, 2017 owned an approximate 96.4% ownership interest in, ERPOP.  The remaining 3.6% interest is owned by limited partners.  As the sole general partner of ERPOP, EQR has exclusive control of ERPOP's day-to-day management. Management operates the Company and the Operating Partnership as one business. The management of EQR consists of the same members as the management of ERPOP.

The Company is structured as an umbrella partnership REIT (“UPREIT”) and EQR contributes all net proceeds from its various equity offerings to ERPOP.  In return for those contributions, EQR receives a number of OP Units (see definition below) in ERPOP equal to the number of Common Shares it has issued in the equity offering. The Company may acquire properties in transactions that include the issuance of OP Units as consideration for the acquired properties. Such transactions may, in certain circumstances, enable the sellers to defer in whole or in part, the recognition of taxable income or gain that might otherwise result from the sales.  This is one of the reasons why the Company is structured in the manner shown above.  Based on the terms of ERPOP's partnership agreement, OP Units can be exchanged with Common Shares on a one-for-one basis because the Company maintains a one-for-one relationship between the OP Units of ERPOP issued to EQR and the outstanding Common Shares.

The Company believes that combining the reports on Form 10-Q of EQR and ERPOP into this single report provides the following benefits:

• enhances investors' understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.

The Company believes it is important to understand the few differences between EQR and ERPOP in the context of how EQR and ERPOP operate as a consolidated company.  All of the Company's property ownership, development and related business operations are conducted through the Operating Partnership and EQR has no material assets or liabilities other than its investment in ERPOP.  EQR's primary function is acting as the general partner of ERPOP.  EQR also issues equity from time to time, the net proceeds of which it is obligated to contribute to ERPOP, and guarantees certain debt of ERPOP, as disclosed in this report. EQR does not have any indebtedness as all debt is incurred by the Operating Partnership.  The Operating Partnership holds substantially all of the assets of the Company, including the Company's ownership interests in its joint ventures.  The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity.  Except for the net proceeds from

equity offerings by EQR, which are contributed to the capital of ERPOP in exchange for additional partnership interests in ERPOP (“OP Units”) (on a one-for-one Common Share per OP Unit basis) or additional preference units in ERPOP (on a one-for-one preferred share per preference unit basis), the Operating Partnership generates all remaining capital required by the Company's business.  These sources include the Operating Partnership's working capital, net cash provided by operating activities, borrowings under its revolving credit facility and/or commercial paper program, the issuance of secured and unsecured debt and equity securities and proceeds received from disposition of certain properties and joint venture interests.

Shareholders' equity, partners' capital and noncontrolling interests are the main areas of difference between the consolidated financial statements of the Company and those of the Operating Partnership.  The limited partners of the Operating Partnership are accounted for as partners' capital in the Operating Partnership's financial statements and as noncontrolling interests in the Company's financial statements.  The noncontrolling interests in the Operating Partnership's financial statements include the interests of unaffiliated partners in various consolidated partnerships. The noncontrolling interests in the Company's financial statements include the same noncontrolling interests at the Operating Partnership level and limited partner OP Unit holders of the Operating Partnership.  The differences between shareholders' equity and partners' capital result from differences in the equity issued at the Company and Operating Partnership levels.

To help investors understand the differences between the Company and the Operating Partnership, this report provides separate consolidated financial statements for the Company and the Operating Partnership; a single set of consolidated notes to such financial statements that includes separate discussions of each entity's debt, noncontrolling interests and shareholders' equity or partners' capital, as applicable; and a combined Management's Discussion and Analysis of Financial Condition and Results of Operations section that includes discrete information related to each entity.

This report also includes separate Part I, Item 4. Controls and Procedures sections and separate Exhibits 31 and 32 certifications for each of the Company and the Operating Partnership in order to establish that the requisite certifications have been made and that the Company and the Operating Partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934 and 18 U.S.C. §1350.

In order to highlight the differences between the Company and the Operating Partnership, the separate sections in this report for the Company and the Operating Partnership specifically refer to the Company and the Operating Partnership.  In the sections that combine disclosure of the Company and the Operating Partnership, this report refers to actions or holdings as being actions or holdings of the Company.  Although the Operating Partnership is generally the entity that directly or indirectly enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the Company is one business and the Company operates that business through the Operating Partnership.

As general partner with control of ERPOP, EQR consolidates ERPOP for financial reporting purposes, and EQR essentially has no assets or liabilities other than its investment in ERPOP.  Therefore, the assets and liabilities of the Company and the Operating Partnership are the same on their respective financial statements.  The separate discussions of the Company and the Operating Partnership in this report should be read in conjunction with each other to understand the results of the Company on a consolidated basis and how management operates the Company.

TABLE OF CONTENTS

	PAGE
PART I.
Item 1. Financial Statements of Equity Residential:
Consolidated Balance Sheets as of September 30, 2017 and December31,2016	2
Consolidated Statements of Operations and Comprehensive Income for the nine months and quarters ended September 30, 2017and2016	3 to 4
Consolidated Statements of Cash Flows for the nine months ended September 30, 2017 and 2016	5 to 7
Consolidated Statement of Changes in Equity for the nine months ended September 30, 2017	8 to 9
Financial Statements of ERP Operating Limited Partnership:
Consolidated Balance Sheets as of September 30, 2017 and December31,2016	10
Consolidated Statements of Operations and Comprehensive Income for the nine months and quarters ended September 30, 2017and2016	11to 12
Consolidated Statements of Cash Flows for the nine months ended September 30, 2017 and 2016	13 to 15
Consolidated Statement of Changes in Capital for the nine months ended September 30, 2017	16 to 17
Notes to Consolidated Financial Statements of Equity Residential and ERP Operating Limited Partnership	18 to 41
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	42 to 56
Item 3. Quantitative and Qualitative Disclosures about Market Risk	56
Item 4. Controls and Procedures	56 to 57
PART II.
Item 1. Legal Proceedings	57
Item 1A. Risk Factors	57
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	57
Item 3. Defaults Upon Senior Securities	57
Item 4. Mine Safety Disclosures	57
Item 5. Other Information	57
Item 6. Exhibits	57

EQUITY RESIDENTIAL

CONSOLIDATED BALANCE SHEETS

(Amounts in thousands except for share amounts)

(Unaudited)

	September 30,			December 31,
	2017			2016
ASSETS
Investment in real estate
Land	$	5,985,004		$	5,899,862
Depreciable property		19,571,402			18,730,579
Projects under development		293,064			637,168
Land held for development		99,073			118,816
Investment in real estate		25,948,543			25,386,425
Accumulated depreciation		(5,849,110	)		(5,360,389	)
Investment in real estate, net		20,099,433			20,026,036
Cash and cash equivalents		46,565			77,207
Investments in unconsolidated entities		59,029			60,141
Deposits – restricted		36,639			76,946
Escrow deposits – mortgage		10,972			64,935
Other assets		445,195			398,883
Total assets	$	20,697,833		$	20,704,148
LIABILITIES AND EQUITY
Liabilities:
Mortgage notes payable, net	$	3,619,180		$	4,119,181
Notes, net		5,143,248			4,848,079
Line of credit and commercial paper		229,844			19,998
Accounts payable and accrued expenses		167,984			147,482
Accrued interest payable		72,811			60,946
Other liabilities		332,650			350,466
Security deposits		65,230			62,624
Distributions payable		192,569			192,296
Total liabilities		9,823,516			9,801,072
Commitments and contingencies
Redeemable Noncontrolling Interests – Operating Partnership		380,541			442,092
Equity:
Shareholders' equity:
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares    authorized; 745,600 shares issued and outstanding as of September 30, 2017 and    December 31, 2016		37,280			37,280
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares    authorized; 367,462,480 shares issued and outstanding as of September 30, 2017 and    365,870,924 shares issued and outstanding as of December 31, 2016		3,675			3,659
Paid in capital		8,848,739			8,758,422
Retained earnings		1,464,249			1,543,626
Accumulated other comprehensive (loss)		(94,674	)		(113,909	)
Total shareholders’ equity		10,259,269			10,229,078
Noncontrolling Interests:
Operating Partnership		228,332			221,297
Partially Owned Properties		6,175			10,609
Total Noncontrolling Interests		234,507			231,906
Total equity		10,493,776			10,460,984
Total liabilities and equity	$	20,697,833		$	20,704,148

See accompanying notes

2

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME

(Amounts in thousands except per share data)

(Unaudited)

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
REVENUES
Rental income	$	1,840,170		$	1,816,960		$	623,951		$	605,856
Fee and asset management		532			3,351			171			218
Total revenues		1,840,702			1,820,311			624,122			606,074
EXPENSES
Property and maintenance		306,645			309,688			104,721			104,216
Real estate taxes and insurance		253,318			238,954			84,087			81,343
Property management		64,702			64,003			20,861			19,517
General and administrative		40,366			47,408			12,567			12,395
Depreciation		542,964			528,242			184,100			179,230
Total expenses		1,207,995			1,188,295			406,336			396,701
Operating income		632,707			632,016			217,786			209,373
Interest and other income		5,708			65,092			3,945			5,509
Other expenses		(3,160	)		(14,480	)		(1,028	)		(10,420	)
Interest:
Expense incurred, net		(288,579	)		(386,316	)		(91,145	)		(86,352	)
Amortization of deferred financing costs		(6,447	)		(10,000	)		(2,064	)		(2,261	)
Income before income and other taxes, (loss) income from    investments in unconsolidated entities, net gain on sales of real    estate properties and land parcels and discontinued operations		340,229			286,312			127,494			115,849
Income and other tax (expense) benefit		(710	)		(1,189	)		(228	)		(426	)
(Loss) income from investments in unconsolidated entities		(2,153	)		5,846			(398	)		7,750
Net gain on sales of real estate properties		141,761			3,870,871			17,328			90,036
Net gain on sales of land parcels		19,170			15,759			—			4,037
Income from continuing operations		498,297			4,177,599			144,196			217,246
Discontinued operations, net		—			124			—			246
Net income		498,297			4,177,723			144,196			217,492
Net (income) attributable to Noncontrolling Interests:
Operating Partnership		(17,931	)		(160,442	)		(5,166	)		(8,353	)
Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Net income attributable to controlling interests		478,012			4,014,913			138,229			208,316
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Net income available to Common Shares	$	475,694		$	4,012,595		$	137,457		$	207,543
Earnings per share – basic:
Income from continuing operations available to Common Shares	$	1.30		$	11.00		$	0.37		$	0.57
Net income available to Common Shares	$	1.30		$	11.00		$	0.37		$	0.57
Weighted average Common Shares outstanding		366,809			364,917			366,996			365,109
Earnings per share – diluted:
Income from continuing operations available to Common Shares	$	1.29		$	10.92		$	0.37		$	0.56
Net income available to Common Shares	$	1.29		$	10.92		$	0.37		$	0.56
Weighted average Common Shares outstanding		382,640			382,284			382,945			382,373
Distributions declared per Common Share outstanding	$	1.51125		$	12.51125		$	0.50375		$	3.50375

See accompanying notes

3

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Continued)

(Amounts in thousands except per share data)

(Unaudited)

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Comprehensive income
Net income	$	498,297		$	4,177,723		$	144,196		$	217,492
Other comprehensive income (loss):
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period		5,216			(4,240	)		1,709			227
Losses reclassified into earnings from other comprehensive    income		14,019			37,262			4,768			4,340
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the period		—			264			—			214
Other comprehensive income		19,235			33,286			6,477			4,781
Comprehensive income		517,532			4,211,009			150,673			222,273
Comprehensive (income) attributable to Noncontrolling Interests		(20,983	)		(164,096	)		(6,201	)		(9,362	)
Comprehensive income attributable to controlling interests	$	496,549		$	4,046,913		$	144,472		$	212,911

See accompanying notes

4

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	498,297		$	4,177,723
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		542,964			528,242
Amortization of deferred financing costs		6,447			10,000
Amortization of above/below market lease intangibles		2,729			2,566
Amortization of discounts and premiums on debt		4,939			(18,328	)
Amortization of deferred settlements on derivative instruments		14,010			37,187
Write-off of pursuit costs		2,329			3,379
Loss (income) from investments in unconsolidated entities		2,153			(5,846	)
Distributions from unconsolidated entities – return on capital		2,031			2,165
Net (gain) on sales of investment securities and other investments		—			(58,416	)
Net (gain) on sales of real estate properties		(141,761	)		(3,870,871	)
Net (gain) on sales of land parcels		(19,170	)		(15,759	)
Net (gain) on sales of discontinued operations		—			(43	)
Compensation paid with Company Common Shares		19,999			25,540
Changes in assets and liabilities:
Decrease in deposits – restricted		788			9,992
Decrease in mortgage deposits		1,447			222
(Increase) decrease in other assets		(23,024	)		4,248
Increase in accounts payable and accrued expenses		62,635			41,371
Increase (decrease) in accrued interest payable		11,865			(15,780	)
(Decrease) in other liabilities		(28,250	)		(24,749	)
Increase (decrease) in security deposits		2,606			(13,522	)
Net cash provided by operating activities		963,034			819,321
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions		(466,395	)		(205,881	)
Investment in real estate – development/other		(227,187	)		(454,502	)
Capital expenditures to real estate		(143,258	)		(124,551	)
Non-real estate capital additions		(776	)		(4,467	)
Interest capitalized for real estate under development		(23,164	)		(41,658	)
Proceeds from disposition of real estate, net		350,000			6,584,126
Investments in unconsolidated entities		(5,324	)		(3,826	)
Distributions from unconsolidated entities – return of capital		329			13,798
Proceeds from sale of investment securities and other investments		—			72,815
Decrease (increase) in deposits on real estate acquisitions and investments, net		39,519			(83,668	)
(Increase) in mortgage deposits		(4,541	)		(21	)
Net cash (used for) provided by investing activities		(480,797	)		5,752,165

See accompanying notes

5

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

(Amounts in thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	$	(6,272	)	$	(507	)
Mortgage deposits		57,057			(6,249	)
Mortgage notes payable, net:
Lump sum payoffs		(493,420	)		(565,084	)
Scheduled principal repayments		(8,771	)		(6,644	)
Notes, net:
Proceeds		692,466		—
Lump sum payoffs		(394,077	)		(1,500,000	)
Line of credit and commercial paper:
Line of credit proceeds		1,845,000			246,000
Line of credit repayments		(1,845,000	)		(246,000	)
Commercial paper proceeds		3,888,675			1,324,784
Commercial paper repayments		(3,681,750	)		(1,712,472	)
Proceeds from settlement of derivative instruments		1,296		—
Proceeds from Employee Share Purchase Plan (ESPP)		2,963			2,778
Proceeds from exercise of options		12,967			26,939
Payment of offering costs		(36	)		(304	)
Other financing activities, net		(40	)		(33	)
Contributions – Noncontrolling Interests – Partially Owned Properties		125		—
Contributions – Noncontrolling Interests – Operating Partnership		—			1
Distributions:
Common Shares		(554,267	)		(3,490,838	)
Preferred Shares		(2,318	)		(2,318	)
Noncontrolling Interests – Operating Partnership		(20,604	)		(137,641	)
Noncontrolling Interests – Partially Owned Properties		(6,873	)		(28,588	)
Net cash (used for) financing activities		(512,879	)		(6,096,176	)
Net (decrease) increase in cash and cash equivalents		(30,642	)		475,310
Cash and cash equivalents, beginning of period		77,207			42,276
Cash and cash equivalents, end of period	$	46,565		$	517,586

See accompanying notes

6

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

(Amounts in thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	$	257,805		$	383,374
Net cash paid for income and other taxes	$	964		$	1,333
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	$	—		$	43,400
Amortization of deferred financing costs:
Other assets	$	1,810		$	2,291
Mortgage notes payable, net	$	1,943		$	3,320
Notes, net	$	2,694		$	4,389
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	$	247		$	(21,318	)
Notes, net	$	1,771		$	2,578
Line of credit and commercial paper	$	2,921		$	412
Amortization of deferred settlements on derivative instruments:
Other liabilities	$	(9	)	$	(75	)
Accumulated other comprehensive income	$	14,019		$	37,262
Write-off of pursuit costs:
Investment in real estate, net	$	2,292		$	2,876
Other assets	$	17		$	399
Accounts payable and accrued expenses	$	20		$	104
Loss (income) from investments in unconsolidated entities:
Investments in unconsolidated entities	$	1,076		$	(6,999	)
Other liabilities	$	1,077		$	1,153
Realized/unrealized (gain) loss on derivative instruments:
Other assets	$	(3,803	)	$	(4,563	)
Notes, net	$	(1,413	)	$	4,563
Other liabilities	$	—		$	4,240
Accumulated other comprehensive income	$	5,216		$	(4,240	)
Investments in unconsolidated entities:
Investments in unconsolidated entities	$	(2,324	)	$	(1,726	)
Other liabilities	$	(3,000	)	$	(2,100	)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	$	329		$	14,014
Other assets	$	—		$	(216	)
Debt financing costs:
Mortgage notes payable, net	$	—		$	(507	)
Notes, net	$	(6,272	)	$	—
Other:
Foreign currency translation adjustments	$	—		$	(264	)

See accompanying notes

7

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY

(Amounts in thousands)

(Unaudited)

	Nine Months Ended
	September 30, 2017
SHAREHOLDERS’ EQUITY
PREFERRED SHARES
Balance, beginning of year	$	37,280
Balance, end of period	$	37,280
COMMON SHARES, $0.01 PAR VALUE
Balance, beginning of year	$	3,659
Conversion of OP Units into Common Shares		11
Exercise of share options		3
Employee Share Purchase Plan (ESPP)		1
Share-based employee compensation expense:
Restricted shares		1
Balance, end of period	$	3,675
PAID IN CAPITAL
Balance, beginning of year	$	8,758,422
Common Share Issuance:
Conversion of OP Units into Common Shares		14,706
Exercise of share options		12,964
Employee Share Purchase Plan (ESPP)		2,962
Share-based employee compensation expense:
Restricted shares		7,488
Share options		6,384
ESPP discount		586
Offering costs		(36	)
Supplemental Executive Retirement Plan (SERP)		(594	)
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership		29,551
Adjustment for Noncontrolling Interests ownership in Operating Partnership		16,306
Balance, end of period	$	8,848,739
RETAINED EARNINGS
Balance, beginning of year	$	1,543,626
Net income attributable to controlling interests		478,012
Common Share distributions		(555,071	)
Preferred Share distributions		(2,318	)
Balance, end of period	$	1,464,249
ACCUMULATED OTHER COMPREHENSIVE (LOSS)
Balance, beginning of year	$	(113,909	)
Accumulated other comprehensive income – derivative instruments:
Unrealized holding gains arising during the period		5,216
Losses reclassified into earnings from other comprehensive income		14,019
Balance, end of period	$	(94,674	)

See accompanying notes

8

EQUITY RESIDENTIAL

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Continued)

(Amounts in thousands)

(Unaudited)

	Nine Months Ended
	September 30, 2017
NONCONTROLLING INTERESTS
OPERATING PARTNERSHIP
Balance, beginning of year	$	221,297
Conversion of OP Units held by Noncontrolling Interests into OP Units held by    General Partner		(14,717	)
Equity compensation associated with Noncontrolling Interests		8,200
Net income attributable to Noncontrolling Interests		17,931
Distributions to Noncontrolling Interests		(20,073	)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership		32,000
Adjustment for Noncontrolling Interests ownership in Operating Partnership		(16,306	)
Balance, end of period	$	228,332
PARTIALLY OWNED PROPERTIES
Balance, beginning of year	$	10,609
Net income attributable to Noncontrolling Interests		2,354
Contributions by Noncontrolling Interests		125
Distributions to Noncontrolling Interests		(6,913	)
Balance, end of period	$	6,175

See accompanying notes

9

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED BALANCE SHEETS

(Amounts in thousands)

(Unaudited)

	September 30,			December 31,
	2017			2016
ASSETS
Investment in real estate
Land	$	5,985,004		$	5,899,862
Depreciable property		19,571,402			18,730,579
Projects under development		293,064			637,168
Land held for development		99,073			118,816
Investment in real estate		25,948,543			25,386,425
Accumulated depreciation		(5,849,110	)		(5,360,389	)
Investment in real estate, net		20,099,433			20,026,036
Cash and cash equivalents		46,565			77,207
Investments in unconsolidated entities		59,029			60,141
Deposits – restricted		36,639			76,946
Escrow deposits – mortgage		10,972			64,935
Other assets		445,195			398,883
Total assets	$	20,697,833		$	20,704,148
LIABILITIES AND CAPITAL
Liabilities:
Mortgage notes payable, net	$	3,619,180		$	4,119,181
Notes, net		5,143,248			4,848,079
Line of credit and commercial paper		229,844			19,998
Accounts payable and accrued expenses		167,984			147,482
Accrued interest payable		72,811			60,946
Other liabilities		332,650			350,466
Security deposits		65,230			62,624
Distributions payable		192,569			192,296
Total liabilities		9,823,516			9,801,072
Commitments and contingencies
Redeemable Limited Partners		380,541			442,092
Capital:
Partners' Capital:
Preference Units		37,280			37,280
General Partner		10,316,663			10,305,707
Limited Partners		228,332			221,297
Accumulated other comprehensive (loss)		(94,674	)		(113,909	)
Total partners' capital		10,487,601			10,450,375
Noncontrolling Interests – Partially Owned Properties		6,175			10,609
Total capital		10,493,776			10,460,984
Total liabilities and capital	$	20,697,833		$	20,704,148

See accompanying notes

10

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME

(Amounts in thousands except per Unit data)

(Unaudited)

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
REVENUES
Rental income	$	1,840,170		$	1,816,960		$	623,951		$	605,856
Fee and asset management		532			3,351			171			218
Total revenues		1,840,702			1,820,311			624,122			606,074
EXPENSES
Property and maintenance		306,645			309,688			104,721			104,216
Real estate taxes and insurance		253,318			238,954			84,087			81,343
Property management		64,702			64,003			20,861			19,517
General and administrative		40,366			47,408			12,567			12,395
Depreciation		542,964			528,242			184,100			179,230
Total expenses		1,207,995			1,188,295			406,336			396,701
Operating income		632,707			632,016			217,786			209,373
Interest and other income		5,708			65,092			3,945			5,509
Other expenses		(3,160	)		(14,480	)		(1,028	)		(10,420	)
Interest:
Expense incurred, net		(288,579	)		(386,316	)		(91,145	)		(86,352	)
Amortization of deferred financing costs		(6,447	)		(10,000	)		(2,064	)		(2,261	)
Income before income and other taxes, (loss) income from    investments in unconsolidated entities, net gain on sales of real    estate properties and land parcels and discontinued operations		340,229			286,312			127,494			115,849
Income and other tax (expense) benefit		(710	)		(1,189	)		(228	)		(426	)
(Loss) income from investments in unconsolidated entities		(2,153	)		5,846			(398	)		7,750
Net gain on sales of real estate properties		141,761			3,870,871			17,328			90,036
Net gain on sales of land parcels		19,170			15,759			—			4,037
Income from continuing operations		498,297			4,177,599			144,196			217,246
Discontinued operations, net		—			124			—			246
Net income		498,297			4,177,723			144,196			217,492
Net (income) attributable to Noncontrolling Interests – Partially Owned    Properties		(2,354	)		(2,368	)		(801	)		(823	)
Net income attributable to controlling interests	$	495,943		$	4,175,355		$	143,395		$	216,669
ALLOCATION OF NET INCOME:
Preference Units	$	2,318		$	2,318		$	772		$	773
General Partner	$	475,694		$	4,012,595		$	137,457		$	207,543
Limited Partners		17,931			160,442			5,166			8,353
Net income available to Units	$	493,625		$	4,173,037		$	142,623		$	215,896
Earnings per Unit – basic:
Income from continuing operations available to Units	$	1.30		$	11.00		$	0.37		$	0.57
Net income available to Units	$	1.30		$	11.00		$	0.37		$	0.57
Weighted average Units outstanding		379,716			378,745			379,906			379,008
Earnings per Unit – diluted:
Income from continuing operations available to Units	$	1.29		$	10.92		$	0.37		$	0.56
Net income available to Units	$	1.29		$	10.92		$	0.37		$	0.56
Weighted average Units outstanding		382,640			382,284			382,945			382,373
Distributions declared per Unit outstanding	$	1.51125		$	12.51125		$	0.50375		$	3.50375

See accompanying notes

11

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Continued)

(Amounts in thousands except per Unit data)

(Unaudited)

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Comprehensive income
Net income	$	498,297		$	4,177,723		$	144,196		$	217,492
Other comprehensive income (loss):
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period		5,216			(4,240	)		1,709			227
Losses reclassified into earnings from other comprehensive    income		14,019			37,262			4,768			4,340
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the period		—			264			—			214
Other comprehensive income		19,235			33,286			6,477			4,781
Comprehensive income		517,532			4,211,009			150,673			222,273
Comprehensive (income) attributable to Noncontrolling Interests –    Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Comprehensive income attributable to controlling interests	$	515,178		$	4,208,641		$	149,872		$	221,450

See accompanying notes

12

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	498,297		$	4,177,723
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		542,964			528,242
Amortization of deferred financing costs		6,447			10,000
Amortization of above/below market lease intangibles		2,729			2,566
Amortization of discounts and premiums on debt		4,939			(18,328	)
Amortization of deferred settlements on derivative instruments		14,010			37,187
Write-off of pursuit costs		2,329			3,379
Loss (income) from investments in unconsolidated entities		2,153			(5,846	)
Distributions from unconsolidated entities – return on capital		2,031			2,165
Net (gain) on sales of investment securities and other investments		—			(58,416	)
Net (gain) on sales of real estate properties		(141,761	)		(3,870,871	)
Net (gain) on sales of land parcels		(19,170	)		(15,759	)
Net (gain) on sales of discontinued operations		—			(43	)
Compensation paid with Company Common Shares		19,999			25,540
Changes in assets and liabilities:
Decrease in deposits – restricted		788			9,992
Decrease in mortgage deposits		1,447			222
(Increase) decrease in other assets		(23,024	)		4,248
Increase in accounts payable and accrued expenses		62,635			41,371
Increase (decrease) in accrued interest payable		11,865			(15,780	)
(Decrease) in other liabilities		(28,250	)		(24,749	)
Increase (decrease) in security deposits		2,606			(13,522	)
Net cash provided by operating activities		963,034			819,321
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions		(466,395	)		(205,881	)
Investment in real estate – development/other		(227,187	)		(454,502	)
Capital expenditures to real estate		(143,258	)		(124,551	)
Non-real estate capital additions		(776	)		(4,467	)
Interest capitalized for real estate under development		(23,164	)		(41,658	)
Proceeds from disposition of real estate, net		350,000			6,584,126
Investments in unconsolidated entities		(5,324	)		(3,826	)
Distributions from unconsolidated entities – return of capital		329			13,798
Proceeds from sale of investment securities and other investments		—			72,815
Decrease (increase) in deposits on real estate acquisitions and investments, net		39,519			(83,668	)
(Increase) in mortgage deposits		(4,541	)		(21	)
Net cash (used for) provided by investing activities		(480,797	)		5,752,165

See accompanying notes

13

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

(Amounts in thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	$	(6,272	)	$	(507	)
Mortgage deposits		57,057			(6,249	)
Mortgage notes payable, net:
Lump sum payoffs		(493,420	)		(565,084	)
Scheduled principal repayments		(8,771	)		(6,644	)
Notes, net:
Proceeds		692,466		—
Lump sum payoffs		(394,077	)		(1,500,000	)
Line of credit and commercial paper:
Line of credit proceeds		1,845,000			246,000
Line of credit repayments		(1,845,000	)		(246,000	)
Commercial paper proceeds		3,888,675			1,324,784
Commercial paper repayments		(3,681,750	)		(1,712,472	)
Proceeds from settlement of derivative instruments		1,296		—
Proceeds from EQR's Employee Share Purchase Plan (ESPP)		2,963			2,778
Proceeds from exercise of EQR options		12,967			26,939
Payment of offering costs		(36	)		(304	)
Other financing activities, net		(40	)		(33	)
Contributions – Noncontrolling Interests – Partially Owned Properties		125		—
Contributions – Limited Partners		—			1
Distributions:
OP Units – General Partner		(554,267	)		(3,490,838	)
Preference Units		(2,318	)		(2,318	)
OP Units – Limited Partners		(20,604	)		(137,641	)
Noncontrolling Interests – Partially Owned Properties		(6,873	)		(28,588	)
Net cash (used for) financing activities		(512,879	)		(6,096,176	)
Net (decrease) increase in cash and cash equivalents		(30,642	)		475,310
Cash and cash equivalents, beginning of period		77,207			42,276
Cash and cash equivalents, end of period	$	46,565		$	517,586

See accompanying notes

14

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

(Amounts in thousands)

(Unaudited)

	Nine Months Ended September 30,
	2017			2016
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	$	257,805		$	383,374
Net cash paid for income and other taxes	$	964		$	1,333
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	$	—		$	43,400
Amortization of deferred financing costs:
Other assets	$	1,810		$	2,291
Mortgage notes payable, net	$	1,943		$	3,320
Notes, net	$	2,694		$	4,389
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	$	247		$	(21,318	)
Notes, net	$	1,771		$	2,578
Line of credit and commercial paper	$	2,921		$	412
Amortization of deferred settlements on derivative instruments:
Other liabilities	$	(9	)	$	(75	)
Accumulated other comprehensive income	$	14,019		$	37,262
Write-off of pursuit costs:
Investment in real estate, net	$	2,292		$	2,876
Other assets	$	17		$	399
Accounts payable and accrued expenses	$	20		$	104
Loss (income) from investments in unconsolidated entities:
Investments in unconsolidated entities	$	1,076		$	(6,999	)
Other liabilities	$	1,077		$	1,153
Realized/unrealized (gain) loss on derivative instruments:
Other assets	$	(3,803	)	$	(4,563	)
Notes, net	$	(1,413	)	$	4,563
Other liabilities	$	—		$	4,240
Accumulated other comprehensive income	$	5,216		$	(4,240	)
Investments in unconsolidated entities:
Investments in unconsolidated entities	$	(2,324	)	$	(1,726	)
Other liabilities	$	(3,000	)	$	(2,100	)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	$	329		$	14,014
Other assets	$	—		$	(216	)
Debt financing costs:
Mortgage notes payable, net	$	—		$	(507	)
Notes, net	$	(6,272	)	$	—
Other:
Foreign currency translation adjustments	$	—		$	(264	)

See accompanying notes

15

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL

(Amounts in thousands)

(Unaudited)

	Nine Months Ended
	September 30, 2017
PARTNERS' CAPITAL
PREFERENCE UNITS
Balance, beginning of year	$	37,280
Balance, end of period	$	37,280
GENERAL PARTNER
Balance, beginning of year	$	10,305,707
OP Unit Issuance:
Conversion of OP Units held by Limited Partners into OP Units held by General Partner		14,717
Exercise of EQR share options		12,967
EQR's Employee Share Purchase Plan (ESPP)		2,963
Share-based employee compensation expense:
EQR restricted shares		7,489
EQR share options		6,384
EQR ESPP discount		586
Net income available to Units – General Partner		475,694
OP Units – General Partner distributions		(555,071	)
Offering costs		(36	)
Supplemental Executive Retirement Plan (SERP)		(594	)
Change in market value of Redeemable Limited Partners		29,551
Adjustment for Limited Partners ownership in Operating Partnership		16,306
Balance, end of period	$	10,316,663
LIMITED PARTNERS
Balance, beginning of year	$	221,297
Conversion of OP Units held by Limited Partners into OP Units held by General Partner		(14,717	)
Equity compensation associated with Units – Limited Partners		8,200
Net income available to Units – Limited Partners		17,931
Units – Limited Partners distributions		(20,073	)
Change in carrying value of Redeemable Limited Partners		32,000
Adjustment for Limited Partners ownership in Operating Partnership		(16,306	)
Balance, end of period	$	228,332
ACCUMULATED OTHER COMPREHENSIVE (LOSS)
Balance, beginning of year	$	(113,909	)
Accumulated other comprehensive income – derivative instruments:
Unrealized holding gains arising during the period		5,216
Losses reclassified into earnings from other comprehensive income		14,019
Balance, end of period	$	(94,674	)

See accompanying notes

16

ERP OPERATING LIMITED PARTNERSHIP

CONSOLIDATEDSTATEMENTOFCHANGESINCAPITAL(Continued)

(Amounts in thousands)

(Unaudited)

	Nine Months Ended
	September 30, 2017
NONCONTROLLING INTERESTS
NONCONTROLLING INTERESTS – PARTIALLY OWNED PROPERTIES
Balance, beginning of year	$	10,609
Net income attributable to Noncontrolling Interests		2,354
Contributions by Noncontrolling Interests		125
Distributions to Noncontrolling Interests		(6,913	)
Balance, end of period	$	6,175

See accompanying notes

17

EQUITY RESIDENTIAL

ERP OPERATING LIMITED PARTNERSHIP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Business

Equity Residential (“EQR”), a Maryland real estate investment trust (“REIT”) formed in March 1993, is an S&P 500 company focused on the acquisition, development and management of rental apartment properties in urban and high-density suburban coastal gateway markets.  ERP Operating Limited Partnership ("ERPOP"), an Illinois limited partnership, was formed in May 1993 to conduct the multifamily residential property business of Equity Residential.  EQR has elected to betaxed as a REIT.  References to the "Company," "we," "us" or "our" mean collectively EQR, ERPOP and those entities/subsidiaries owned or controlled by EQR and/or ERPOP.  References to the "Operating Partnership" mean collectively ERPOP and those entities/subsidiaries owned or controlled by ERPOP.  Unless otherwise indicated, the notes to consolidated financial statements apply to both the Company and the OperatingPartnership.

EQR is the general partner of, and as of September 30, 2017 owned an approximate 96.4% ownership interest in, ERPOP.  All of the Company's property ownership, development and related business operations are conducted through the Operating PartnershipandEQRhasnomaterialassetsorliabilitiesotherthanitsinvestmentinERPOP.  EQRissuespublicequityfromtime totime,thenetproceedsofwhichitisobligatedtocontributetoERPOP,butdoesnothaveanyindebtednessasalldebtisincurred by the Operating Partnership.  The Operating Partnership holds substantially all of the assets of the Company, including the Company's ownership interests in its joint ventures.  The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly tradedequity.  

As of September 30, 2017, the Company, directly or indirectly through investments in title holding entities, owned all or a portion of 305 properties located in 10 states and the District of Columbia consisting of 78,302 apartment units.  The ownership breakdown includes (table does not include various uncompleted development properties):

	Properties		Apartment Units
Wholly Owned Properties		283		73,289
Master-Leased Properties – Consolidated		3		853
Partially Owned Properties – Consolidated		17		3,215
Partially Owned Properties – Unconsolidated		2		945
		305		78,302

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X.  Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.  In the opinion of management, all adjustments (consisting of normal recurring accruals) and certain reclassifications considered necessary for a fair presentation have been included.  Certain reclassifications have been made to the prior period financial statements in order to conform to the current year presentation.  These reclassifications did not have an impact on net income previously reported.  Operating results for the nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017.

In preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States, management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from these estimates.

The balance sheets at December 31, 2016 have been derived from the audited financial statements at that date but do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

18

For further information, including definitions of capitalized terms not defined herein, refer to the consolidated financial statements and footnotes thereto included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

Income and Other Taxes

Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level.  In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level.  Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes.  The Company has elected Taxable REIT Subsidiary (“TRS”) status for certain of its corporate subsidiaries and as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses.

Deferred tax assets and liabilities are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases.  These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled.  The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted.  The Company’s deferred tax assets were generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities.  As of September 30, 2017, the Company has elected REIT status for its primary TRS upon filing the 2016 tax return in the third quarter of 2017, with the election retroactive to January 1, 2016.  As a result, the Company wrote-off its deferred tax assets, which were fully reserved, as of September 30, 2017.

Recently Issued Accounting Pronouncements

InMay2014,theFinancialAccountingStandardsBoard(the"FASB")issuedacomprehensivenewrevenuerecognition standard entitled Revenue from Contracts with Customers that will supersede nearly all existing revenue recognition guidance.  Thenewstandardspecificallyexcludesleaserevenue.  Thenewstandard’scoreprincipleisthatacompanywillrecognizerevenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expectstobeentitledinexchangeforthosegoodsorservices.  Companieswilllikelyneedtousemorejudgmentandmakemore estimatesthanundercurrentrevenuerecognitionguidance.  Thesemayincludeidentifyingperformanceobligationsinthecontract, estimating the amount of variable consideration, if any, to include in the transaction price and allocating the transaction price to each separate performance obligation.  The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect, if any, recognized as of the date of adoption.  The Company anticipates selecting the modified retrospective transition method with a cumulative effect recognized as of the date of adoption and will adoptthenewstandardeffectiveJanuary1,2018, when effective.  TheCompanyiscontinuingtoevaluatethestandard;however,wedonotexpect itsadoptiontohaveasignificantimpactontheconsolidatedfinancialstatements,asapproximately95%oftotalrevenuesconsistof rental income from leasing arrangements, which is specifically excluded from the standard.  In addition, the Company'sfee and assetmanagementactivitiesareimmaterialnowthatitsolditsinterestinJointBaseLewisMcChord in 2016andgiventhenatureofitsdispositiontransactions,thereshouldbenochangesinaccountingunderthenewstandard.

InJanuary2016,theFASBissuedanewstandardwhichrequirescompaniestomeasureallequitysecuritieswithreadily determinablefairvaluesatfairvalueonthebalancesheet,withchangesinfairvaluerecognizedinnetincome.  Thenewstandard will be effective for the Company beginning on January 1, 2018.  The Company does not expect that this will have a material effect on its consolidated results of operations or financialposition.

InFebruary2016,the FASB issued a new leases standard which sets out principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessors and lessees).  The new standard requires the following:

• Lessors – Leases will be accounted for using an approach that is substantially equivalent to existing guidance for operating, sales-type and financing leases, but aligned with the new revenue recognition standard.  Lessors will be required to allocate lease payments to separate lease and non-lease components of each lease agreement, with the non-lease components evaluated under the new revenue recognition standard.

19

• Lessees – Leases will be accounted for using a dual approach, classifying leases as either operating or finance based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee.  This classification will determine whether the lease expense is recognized on a straight-line basis over the term of the lease (for operating leases) or based on an effective interest method with a front-loaded expense recognition (for finance leases).  A lessee is also required to record a right-of-use asset and a lease liability on its balance sheet for all leases with a term of greater than 12 months regardless of their classification as operating or finance leases.  Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases.

The new standard will be effective for the Company beginning on January 1, 2019, with early adoption permitted, though the Company currently anticipates adopting the new standard on the effective date.  The new standard must be adopted using a modified retrospective method, which requires application of the new guidance at the beginning of the earliest comparative period presented and provides for certain practical expedients, which the Company currently anticipates electing.  The Company anticipates that its residential and retail/commercial leases where it is the lessor will continue to be accounted for as operating leases under the new standard.  Therefore, the Company does not currently anticipate significant changes in the accounting for its lease revenues.  The Company is also the lessee under various corporate office and ground leases, which it will be required to recognize right of use assets and related lease liabilities on its consolidated balance sheets upon adoption.  The Company currently anticipates that its corporate office leases where it is the lessee will continue to be accounted for as operating leases under the new standard.  Based on its anticipated election of the practical expedients, the Company would not be required to reassess the classification of existing ground leases and therefore these leases would continue to be accounted for as operating leases.  However, in the event we modify existing ground leases and/or enter into new ground leases after adoption of the new standard, such leases will likely be classified as finance leases.  The Company will continue to evaluate the impact of adopting the new leases standard on its consolidated results of operations and financial position.

In June 2016, the FASB issued a new standard which requires companies to adopt a new approach for estimating credit losses on certain types of financial instruments, such as trade and other receivables and loans.  The standard will require entities to estimate a lifetime expected credit loss for most financial instruments, including trade receivables.  The new standard will be effective for the Company beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019.  TheCompanyiscurrentlyevaluatingtheimpactofadoptingthenewstandardonitsconsolidatedresultsofoperationsand financial position.

InAugust2016andOctober2016,theFASBissuednewstandardstoclarifyhowspecifictransactionsareclassifiedand presented on the statement of cash flows.  Among other clarifications, the new standards specifically provide guidance for the following items within the statement of cash flows which have required significant judgment in thepast:

• Cash payments related to debt prepayments or extinguishment costs are to be classified within financingactivities;

• The portion of the cash payment made to settle a zero-coupon bond or a bond with an insignificant cash coupon attributable to accreted interest related to a debt discount is to be classified as a cash outflow within operating activities, and the portion attributable to the principal is to be classified within financingactivities;

• Insurance settlement proceeds are to be classified based on the nature of theloss;

• Companies must elect to classify distributions received from equity method investees using either a cumulative earnings approach or a look-through approach and the election must be disclosed;and

• Restrictedcashwillbeincludedwithcashandcashequivalentsonthestatementofcashflows.  Totalcashandcash equivalents and restricted cash are to be reconciled to the related line items on the balancesheet.

Thenewstandardsmustbeappliedretrospectivelytoallperiodspresentedintheconsolidatedfinancialstatementsandtheywill beeffectivefortheCompanybeginningonJanuary1,2018,withearlyadoptionpermitted.  TheCompany currently anticipates adopting the new standards in the fourth quarter of 2017 and plans to continue to apply the look-through approach for distributions received from equity method investees.  The Company does not expect overall cash flows to change; however, there will be material changes between cash flow classifications due to the substantial debt prepayment penalties that the Company has incurred in the comparative period.

InFebruary 2017,theFASB issuedanewstandardwhich clarifies the accounting treatment for partial sales of nonfinancial assets (i.e. real estate).  The standard clarifies that partial sales transactions include contributions of nonfinancial assets to a joint venture or other noncontrolled investee.  Companies must recognize a full gain or loss on transfers of nonfinancial assets to equity method investees.  The standard requires companies to derecognize distinct nonfinancial assets or distinct in substance nonfinancial assets in partial sale transactions when it does not have a controlling financial interest in the legal entity that holds the asset and transfers control of the asset.  Once the distinct nonfinancial asset is transferred, the company is required to measure any non-controlling interest it receives or retains at fair value and

20

recognize a full gain or loss on the transaction.  If a company transfers ownership interests in a consolidated subsidiary and continues to maintain a controlling financial interest, the company does not derecognize the assets or liabilities, and accounts for the transaction as an equity transaction and no gain or loss is recognized. The new standard will be effective for the Company beginning on January 1, 2018 and early adoption was permitted beginning on January 1, 2017.  The Company anticipates adopting the new standard concurrently with the new revenue recognition standard.  The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect recognized as of the date of adoption.  The Company has not had a partial sale of nonfinancial assets in the current or comparative periods.  Therefore, the Company does not currently believe that the adoption of this standard will have a material impact on its consolidated results of operations and financial position.

In August 2017, the FASB issued a final standard which makes changes to the hedge accounting model to enable entities to better portray their risk management activities in the financial statements.  The new standard expands an entity’s ability to hedge nonfinancial and financial risk components, reduces complexity in fair value hedges of interest rate risk and eases certain documentation and assessment requirements.  The new standard also eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of any hedging instrument to be presented in the same income statement line as the hedged instrument.  The new standard will be effective for the Company beginning on January 1, 2019 and early adoption is permitted.  The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position.

Recently Adopted Accounting Pronouncements

InFebruary2015,theFASBissuednewconsolidationguidancewhichmadechangestoboththevariableinterestmodel andthevotingmodel.  Amongotherchanges,thenewstandardspecificallyeliminatedthepresumptioninthecurrentvotingmodel that a general partner controls a limited partnership or similar entity unless that presumption can be overcome.  Generally, only a singlelimitedpartnerthatisabletoexercisesubstantivekick-outrightswillconsolidate.  TheCompanyadoptedthisnewstandard as required effective January 1, 2016.  While adoption of the new standard did not result in any changes to conclusions about whetherajointventurewasconsolidatedorunconsolidated,theCompanyhasdeterminedthatcertainofitsjointventuresandthe OperatingPartnershipwillnowqualifyasvariableinterestentities("VIEs")andthereforewillrequireadditionaldisclosures.  See Note 6 for further discussion.

InMarch2016,theFASBissuedanewstandardwhichsimplifiedseveralaspectsoftheaccountingforemployeeshare-basedpaymenttransactions,includingincometaxconsequences,classificationofawardsasequityorliability,statementofcash flows classification and policy election options for forfeitures.  The Company adopted this new standard as required effective January 1, 2017.  The Company will continue to estimate the number of awards expected to be forfeited and adjust the estimate whenitisnolongerprobablethattheemployeewillfulfilltheservicecondition,aswasrequired under the old standard.  The adoption of this standard did not have a material impact on our consolidated results of operations or financialposition.

InJanuary2017,theFASB issuedanewstandardwhichclarified thedefinitionofabusiness.  Thestandard'sobjectivewasto addadditionalguidancethatassistscompaniesindeterminingwhethertransactionsshouldbeaccountedforasanassetacquisition or a business combination.  The new standard first requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets.  If this threshold is met, the set is not a business.  If this threshold is not met, the entity next evaluates whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs.  Amongotherdifferences,transactioncostsassociatedwithassetacquisitionsarecapitalizedwhilethoseassociatedwithbusiness combinationsareexpensedasincurred.  Inaddition,purchasepriceinanassetacquisitionisallocatedonarelativefairvaluebasis while in a business combination it is generally measured at fair value.  The new standard will be applied prospectively to any transactions occurring within the period of adoption.  The Company early adopted the new standard as allowed effective January 1, 2017.  The Company anticipates that substantially all of its transactions will now be accounted for as asset acquisitions, which means transaction costs will largely be capitalized as noted above.  

Other

The Company is the controlling partner in various consolidated partnerships owning 17 properties and 3,215 apartment units having a noncontrolling interest book value of $6.2 million at September 30, 2017.  The Company is required to make certain disclosures regarding noncontrolling interests in consolidated limited-life subsidiaries.  Of the consolidated entities described above, the Company is the controlling partner in limited-life partnerships owning four properties having a noncontrolling interest deficit balance of $7.3 million.  These four partnership agreements contain provisions that require the partnerships to be liquidated through the sale of their assets upon reaching a date specified in each respective partnership agreement.  The Company, as controlling partner, has an obligation to cause the property owning partnerships to distribute the proceeds of liquidation to the Noncontrolling Interests in these Partially Owned Properties only to the extent that the net proceeds received by the partnerships from the sale of their assets warrant a distribution based on the partnership agreements.  As of September 30, 2017, the Company estimates the value of

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Noncontrolling Interest distributions for these four properties would have been approximately $65.8 million (“Settlement Value”) had the partnerships been liquidated.  This Settlement Value is based on estimated third party consideration realized by the partnerships upon disposition of thefourPartially Owned Properties and is net of all other assets and liabilities, including yield maintenance on the mortgages encumbering the properties, that would have been due onSeptember 30, 2017 had those mortgages been prepaid.  Due to, among other things, the inherent uncertainty in the sale of real estate assets, the amount of any potential distribution to the Noncontrolling Interests in the Company's Partially Owned Properties is subject to change.  To the extent that the partnerships' underlying assets are worth less than the underlying liabilities, the Company has no obligation to remit any consideration to the Noncontrolling Interests in these Partially Owned Properties.

3. Equity, Capital and OtherInterests

Equity and Redeemable Noncontrolling Interests of Equity Residential

The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and restricted units) for the nine months ended September 30, 2017:

	2017
Common Shares
Common Shares outstanding at January 1,		365,870,924
Common Shares Issued:
Conversion of OP Units		1,107,735
Exercise of share options		343,527
Employee Share Purchase Plan (ESPP)		54,843
Restricted share grants, net		85,451
Common Shares Outstanding at September 30,		367,462,480
Units
Units outstanding at January 1,		14,626,075
Restricted unit grants, net		291,647
Conversion of OP Units to Common Shares		(1,107,735	)
Units outstanding at September 30,		13,809,987
Total Common Shares and Units outstanding at September 30,		381,272,467
Units Ownership Interest in Operating Partnership		3.6	%

The equity positions of various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units, as well as the equity positions of the holders of restricted units, are collectively referred to as the “Noncontrolling Interests – Operating Partnership”.  Subject to certain exceptions (including the “book-up” requirements of restricted units), the Noncontrolling Interests – Operating Partnership may exchange their Units with EQR for Common Shares on a one-for-one basis.  The carrying value of the Noncontrolling Interests – Operating Partnership (including redeemable interests) is allocated based on the number of Noncontrolling Interests – Operating Partnership Units in total in proportion to the number of Noncontrolling Interests – Operating Partnership Units in total plus the number of Common Shares.  Net income is allocated to the Noncontrolling Interests – Operating Partnership based on the weighted average ownership percentage during the period.

The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Noncontrolling Interests – Operating Partnership Units requesting an exchange of their OP Units with EQR.  Once the Operating Partnership elects not to redeem the Noncontrolling Interests – Operating Partnership Units for cash, EQR is obligated to deliver Common Shares to the exchanging holder of the Noncontrolling Interests – Operating Partnership Units.

TheNoncontrollingInterests–OperatingPartnershipUnitsareclassifiedaseithermezzanineequityorpermanentequity.  If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Noncontrolling Interests – Operating Partnership are differentiated and referred to as “Redeemable Noncontrolling Interests – Operating Partnership”.  Instruments that require settlement in registered shares cannot be classified in permanent equity as it is not always completely within an issuer’s control to deliver registered shares.  Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet.  The Redeemable Noncontrolling Interests – Operating Partnership are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period.  EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Noncontrolling Interests – Operating Partnership Units that are

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classified in permanent equity at September 30, 2017 and December 31, 2016.

ThecarryingvalueoftheRedeemableNoncontrollingInterests–OperatingPartnershipisallocatedbasedonthenumber ofRedeemableNoncontrollingInterests–OperatingPartnershipUnitsinproportiontothenumberofNoncontrollingInterests– Operating Partnership Units in total.  Such percentage of the total carrying value of Units which is ascribed to the Redeemable NoncontrollingInterests–OperatingPartnershipisthenadjustedtothegreaterofcarryingvalueorfairmarketvalueasdescribed above.  As of September 30, 2017, the Redeemable Noncontrolling Interests – Operating Partnership have a redemption value of approximately$380.5million,whichrepresentsthevalueofCommonSharesthatwouldbeissuedinexchangefortheRedeemable NoncontrollingInterests–OperatingPartnershipUnits.

ThefollowingtablepresentsthechangesintheredemptionvalueoftheRedeemableNoncontrollingInterests–Operating Partnership for the nine months ended September 30, 2017 (amounts inthousands):

	2017
Balance at January 1,	$	442,092
Change in market value		(29,551	)
Change in carrying value		(32,000	)
Balance at September 30,	$	380,541

Net proceeds from EQR Common Share and Preferred Share (see definition below) offerings are contributed by EQR to ERPOP.  In return for those contributions, EQR receives a number of OP Units in ERPOP equal to the number of Common Shares it has issued in the equity offering (or in the case of a preferred equity offering, a number of preference units in ERPOP equal in number and having the same terms as the Preferred Shares issued in the equity offering).  As a result, the net offering proceeds from Common Shares and Preferred Shares are allocated between shareholders’ equity and Noncontrolling Interests – Operating Partnership to account for the change in their respective percentage ownership of the underlying equity of ERPOP.

TheCompany’sdeclarationoftrustauthorizesittoissueupto100,000,000preferredsharesofbeneficialinterest,$0.01 par value per share (the “Preferred Shares”), with specific rights, preferences and other attributes as the Board of Trustees may determine, which may include preferences, powers and rights that are senior to the rights of holders of the Company’s Common Shares.

ThefollowingtablepresentstheCompany’sissuedandoutstandingPreferredSharesasof September 30, 2017 and December 31, 2016:

				Amounts in thousands
		Annual
	Call	Dividend per		September 30,		December 31,
	Date (1)	Share (2)		2017		2016
Preferred Shares of beneficial interest, $0.01 par value;    100,000,000 shares authorized:
8.29% Series K Cumulative Redeemable Preferred;    liquidation value $50 per share; 745,600 shares issued and    outstanding at September 30, 2017 and December 31, 2016	12/10/26	$	4.145	$	37,280	$	37,280
				$	37,280	$	37,280

(1) On or after the call date, redeemable preferred shares may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any.

(2) Dividends on Preferred Shares are payable quarterly.

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Capital and Redeemable Limited Partners of ERP Operating Limited Partnership

The following tables present the changes in the Operating Partnership’s issued and outstanding Units and in the limited partners’ Units for the nine months ended September 30, 2017:

	2017
General and Limited Partner Units
General and Limited Partner Units outstanding at January 1,		380,496,999
Issued to General Partner:
Exercise of EQR share options		343,527
EQR’s Employee Share Purchase Plan (ESPP)		54,843
EQR's restricted share grants, net		85,451
Issued to Limited Partners:
Restricted unit grants, net		291,647
General and Limited Partner Units outstanding at September 30,		381,272,467
Limited Partner Units
Limited Partner Units outstanding at January 1,		14,626,075
Limited Partner restricted unit grants, net		291,647
Conversion of Limited Partner OP Units to EQR Common    Shares		(1,107,735	)
Limited Partner Units outstanding at September 30,		13,809,987
Limited Partner Units Ownership Interest in Operating    Partnership		3.6	%

The Limited Partners of the Operating Partnership as of September 30, 2017 include various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units, as well as the equity positions of the holders of restricted units.  Subject to certain exceptions (including the “book-up” requirements of restricted units), Limited Partners may exchange their Units with EQR for Common Shares on a one-for-one basis.  The carrying value of the Limited Partner Units (including redeemable interests) is allocated based on the number of Limited Partner Units in total in proportion to the number of Limited Partner Units in total plus the number of General Partner Units.  Net income is allocated to the Limited Partner Units based on the weighted average ownership percentage during the period.

The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Limited Partner Units requesting an exchange of their OP Units with EQR.  Once the Operating Partnership elects not to redeem the Limited Partner Units for cash, EQR is obligated to deliver Common Shares to the exchanging limited partner.

The Limited Partner Units are classified as either mezzanine equity or permanent equity.  If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Limited Partner Units are differentiated and referred to as “Redeemable Limited Partner Units”.  Instruments that require settlement in registered shares cannot be classified in permanent equity as it is not always completely within an issuer's control to deliver registered shares.  Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet.  The Redeemable Limited Partner Units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period.  EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Limited Partner Units that are classified in permanent equity at September 30, 2017 and December 31, 2016.

The carrying value of the Redeemable Limited Partner Units is allocated based on the number of Redeemable Limited PartnerUnitsinproportiontothenumberofLimitedPartnerUnitsintotal.  SuchpercentageofthetotalcarryingvalueofLimited Partner Units which is ascribed to the Redeemable Limited Partner Units is then adjusted to the greater of carrying value or fair market value as described above.  As of September 30, 2017, the Redeemable Limited Partner Units have a redemption value of approximately$380.5million,whichrepresentsthevalueofCommonSharesthatwouldbeissuedinexchangefortheRedeemable Limited PartnerUnits.

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The following table presents the changes in the redemption value of the Redeemable Limited Partners for the nine months ended September 30, 2017 (amounts in thousands):

	2017
Balance at January 1,	$	442,092
Change in market value		(29,551	)
Change in carrying value		(32,000	)
Balance at September 30,	$	380,541

EQR contributes all net proceeds from its various equity offerings (including proceeds from exercise of options for CommonShares)toERPOP.  Inreturnforthosecontributions,EQRreceivesanumberofOPUnitsinERPOPequaltothenumber ofCommonSharesithasissuedintheequityoffering(orinthecaseofapreferredequityoffering,anumberofpreferenceunits in ERPOP equal in number and having the same terms as the preferred shares issued in the equityoffering).

ThefollowingtablepresentstheOperatingPartnership'sissuedandoutstanding“PreferenceUnits”asofSeptember 30, 2017 and December 31, 2016:

				Amounts in thousands
		Annual
	Call	Dividend Per		September 30,		December 31,
	Date (1)	Unit (2)		2017		2016
Preference Units:
8.29% Series K Cumulative Redeemable Preference Units;    liquidation value $50 per unit; 745,600 units issued and    outstanding at September 30, 2017 and December 31, 2016	12/10/26	$	4.145	$	37,280	$	37,280
				$	37,280	$	37,280

(1) On or after the call date, redeemable preference units may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares.

(2) Dividends on Preference Units are payable quarterly.

Other

In September 2009, the Company announced the establishment of an At-The-Market (“ATM”) share offering program which would allow EQR to sell Common Shares from time to time into the existing trading market at current market prices as wellasthroughnegotiatedtransactions.  PerthetermsofERPOP'spartnershipagreement,EQRcontributesthenetproceedsfrom all equity offerings to the capital of ERPOP in exchange for additional OP Units (on a one-for-one Common Share per OP Unit basis).  The program currently has a maturity of June 2019.  EQR has the authority to issue 13.0 million shares but has not issued any shares under this program since September 2012.

The Company may repurchase up to 13.0 million Common Shares under its share repurchase program.  No shares were repurchased during the nine months ended September 30, 2017 and as a result, EQR has remaining authorization to repurchase up to 13.0 million of its shares under the repurchase program as of September 30, 2017.  

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4. Real Estate and Lease Intangibles

The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017			December 31, 2016
Land	$	5,985,004		$	5,899,862
Depreciable property:
Buildings and improvements		17,601,348			16,913,430
Furniture, fixtures and equipment		1,500,963			1,346,300
In-Place lease intangibles		469,091			470,849
Projects under development:
Land		61,047			115,876
Construction-in-progress		232,017			521,292
Land held for development:
Land		63,439			84,440
Construction-in-progress		35,634			34,376
Investment in real estate		25,948,543			25,386,425
Accumulated depreciation		(5,849,110	)		(5,360,389	)
Investment in real estate, net	$	20,099,433		$	20,026,036

The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of September 30, 2017 and December 31, 2016 (amounts in thousands):

Description	Balance Sheet Location	September 30, 2017			December 31, 2016
Assets
Ground lease intangibles – below market	Other Assets	$	191,918		$	178,251
Retail lease intangibles – above market	Other Assets		1,260			1,260
Lease intangible assets			193,178			179,511
Accumulated amortization			(21,305	)		(17,972	)
Lease intangible assets, net		$	171,873		$	161,539
Liabilities
Ground lease intangibles – above market	Other Liabilities	$	2,400		$	2,400
Retail lease intangibles – below market	Other Liabilities		5,270			5,270
Lease intangible liabilities			7,670			7,670
Accumulated amortization			(5,113	)		(4,509	)
Lease intangible liabilities, net		$	2,557		$	3,161

The following table provides a summary of the effect of the amortization for above and below market ground and retail lease intangibles ontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months and quarters ended September 30, 2017 and 2016 respectively (amounts in thousands):

		Nine Months Ended						Quarter Ended
		September 30,						September 30,
Description	Income Statement Location	2017			2016			2017			2016
Ground lease intangible amortization	Property and Maintenance	$	(3,253	)	$	(3,241	)	$	(1,092	)	$	(1,080	)
Retail lease intangible amortization	Rental Income		524			675			80			222
Total amortization of above/below     market lease intangibles		$	(2,729	)	$	(2,566	)	$	(1,012	)	$	(858	)

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The following table provides a summary of the aggregate amortization for above and below market ground and retail lease intangibles for each of the next five years (amounts in thousands):

	Remaining
	2017			2018			2019			2020			2021			2022
Ground lease intangibles	$	(1,116	)	$	(4,463	)	$	(4,463	)	$	(4,463	)	$	(4,463	)	$	(4,463	)
Retail lease intangibles		16			71			71			71			71			27
Total	$	(1,100	)	$	(4,392	)	$	(4,392	)	$	(4,392	)	$	(4,392	)	$	(4,436	)

During the nine months ended September 30, 2017, the Company acquired the entire equity interest in the following from  unaffiliated parties (purchase price in thousands):

	Properties		Apartment Units		Purchase Price
Rental Properties – Consolidated (1)		4		947	$	468,050
Total		4		947	$	468,050

(1) Purchase price includes an allocation of approximately $68.3 million to land, $386.2 million to depreciable property (inclusive of capitalized closing costs) and $13.7 million to ground lease intangible (included in other assets).  For one of the property acquisitions, the Company owns the building and improvements and leases the land underlying the improvements under a long-term ground lease that expires in 2113. This property is consolidated and reflected as a real estate asset while the ground lease is accounted for as an operating lease.

During the nine months ended September 30, 2017, the Company disposed of the following to unaffiliated parties (sales price in thousands):

	Properties		Apartment Units		Sales Price
Rental Properties – Consolidated		4		1,024	$	319,700
Land Parcels (one)		—		—		33,450
Total		4		1,024	$	353,150

The Company recognized a net gain on sales of real estate properties of approximately $141.8 million and a net gain on sales of land parcels of approximately $19.2 million on the above sales.

5. Commitments to Acquire/Dispose of RealEstate

The Company has not entered into any separate agreements to acquire rental properties or land parcels as of October 27, 2017.

The Company has entered into a separate agreement to dispose of the following (sales price in thousands):

	Properties		Apartment Units		Sales Price
Land Parcels (one)		—		—	$	2,700
Total		—		—	$	2,700

The closing of this pending transaction is subject to certain conditions and restrictions, therefore, there can be no assurance that this transaction will be consummated or that the final terms will not differ in material respects from those summarized above.

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6. Investments in Partially OwnedEntities

TheCompanyhasco-investedinvariouspropertieswithunrelatedthirdpartieswhichareeitherconsolidatedoraccounted for under the equity method of accounting (unconsolidated).  The following tables and information summarize the Company’s investmentsinpartiallyownedentitiesasof September 30, 2017(amountsinthousandsexceptforpropertyandapartmentunitamounts):

	Consolidated			Unconsolidated
	(VIE)			(Non-VIE)			(VIE) (1)			Total
Total properties		17			2			—			2
Total apartment units		3,215			945			—			945
Balance sheet information at 9/30/2017 (at 100%):
ASSETS
Investment in real estate	$	648,839		$	236,630		$	172,995		$	409,625
Accumulated depreciation		(226,607	)		(40,840	)		(48,670	)		(89,510	)
Investment in real estate, net		422,232			195,790			124,325			320,115
Cash and cash equivalents		22,914			7,194			139			7,333
Investments in unconsolidated entities		45,035			—			—			—
Deposits – restricted		385			258			—			258
Other assets		26,246			450			105			555
Total assets	$	516,812		$	203,692		$	124,569		$	328,261
LIABILITIES AND EQUITY/CAPITAL
Mortgage notes payable, net (2)	$	302,037		$	145,424		$	—		$	145,424
Accounts payable & accrued expenses		2,975			2,644			150			2,794
Accrued interest payable		1,024			691			—			691
Other liabilities		453			308			27			335
Security deposits		2,037			488			—			488
Total liabilities		308,526			149,555			177			149,732
Noncontrolling Interests – Partially Owned    Properties/Partners' equity		6,175			54,336			84,682			139,018
Company equity/General and Limited Partners' Capital		202,111			(199	)		39,710			39,511
Total equity/capital		208,286			54,137			124,392			178,529
Total liabilities and equity/capital	$	516,812		$	203,692		$	124,569		$	328,261

	Consolidated			Unconsolidated
	(VIE)			(Non-VIE)			(VIE) (1)			Total
Operating information for the nine months ended 9/30/2017    (at 100%):
Operating revenue	$	69,917		$	20,050		$	3,805		$	23,855
Operating expenses		17,056			6,746			1,573			8,319
Net operating income		52,861			13,304			2,232			15,536
Property management		2,463			584			56			640
General and administrative/other		239			1			127			128
Depreciation		15,569			7,960			4,126			12,086
Operating income (loss)		34,590			4,759			(2,077	)		2,682
Interest and other income		45			—			—			—
Interest:
Expense incurred, net		(9,977	)		(6,217	)		—			(6,217	)
Amortization of deferred financing costs		(203	)		(1	)		—			(1	)
Income (loss) before income and other taxes and (loss)    from investments in unconsolidated entities		24,455			(1,459	)		(2,077	)		(3,536	)
Income and other tax (expense) benefit		(34	)		(13	)		—			(13	)
(Loss) from investments in unconsolidated entities		(1,155	)		—			—			—
Net income (loss)	$	23,266		$	(1,472	)	$	(2,077	)	$	(3,549	)

(1) Includes the Company’s unconsolidated interest in an entity that owns the land underlying our Wisconsin Place apartment property and owns and operates the parking facility.  This entity is excluded from the property and apartment unit count.

(2) All debt is non-recourse to the Company.

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Note: The above tables exclude EQR's ownership interest in ERPOP, private equity fund investments, and the Company's interests in unconsolidated joint ventures established in connection with the acquisition of certain real estate related assets from Archstone Enterprise LP ("Archstone").  These ventures owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation, as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries.  The preferred interests had an aggregate liquidation value of $37.4 million at September 30, 2017.  The ventures are owned 60% by the Company.  See below for further discussion.  

Operating Properties

The Company has various equity interests in certain limited partnerships owning 16 properties containing 2,783 apartment units.  Each partnership owns a multifamily property.  The Company is the general partner of these limited partnerships and is responsible for managing the operations and affairs of the partnerships as well as making all decisions regarding the businesses of the partnerships.  The limited partners are not able to exercise substantive kick-out or participating rights.  As a result, the partnerships qualify as VIEs.  The Company has a controlling financial interest in the VIEs and, thus, is the VIEs' primary beneficiary.  The Company has both the power to direct the activities of the VIEs that most significantly impact the VIEs' economic performance as well as the obligation to absorb losses or the right to receive benefits from the VIEs that could potentially be significant to the VIEs.  As a result, the partnerships are required to be consolidated on the Company's financial statements.

The Company has a 75% equity interest in the Wisconsin Place joint venture.  The project contains a mixed-use site located in Chevy Chase, Maryland consisting of residential, retail, office and accessory uses, including underground parking facilities.  The joint venture owns the 432 unit residential component, but has no ownership interest in the retail and office components.  At September 30, 2017, the residential component had a net book value of $167.0 million.  The Company is the managing member and is responsible for conducting all administrative day-to-day matters and affairs of the joint venture as well as implementing all decisions with respect to the joint venture.  The limited partner is not able to exercise substantive kick-out or participating rights.  As a result, the joint venture qualifies as a VIE.  The Company has a controlling financial interest in the VIE and, thus, is the VIE's primary beneficiary.  The Company has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance as well as the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE.  As a result, the entity that owns the residential component is required to be consolidated on the Company's financial statements.

The Wisconsin Place joint venture also retains an unconsolidated interest in an entity that owns the land underlying the entire project and owns and operates the parking facility.  At September 30, 2017, the basis of this investment was $45.0 million.  The joint venture, as a limited partner, does not have substantive kick-out or participating rights in the entity.  As a result, the entity qualifies as a VIE.  The joint venture does not have a controlling financial interest in the VIE and is not the VIE's primary beneficiary.  The joint venture does not have the power to direct the activities of the VIE that most significantly impact the VIE's economic performance or the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE.  As a result, the entity that owns the land and owns and operates the parking facility is unconsolidated and recorded using the equity method of accounting.

The Company has a 20% equity interest in each of the Nexus Sawgrass and Domain joint ventures.  The Nexus Sawgrass joint venture owns a 501 unit apartment property located in Sunrise, Florida and the Company's interest had a basis of $4.4 million at September 30, 2017.  The Domain joint venture owns a 444 unit apartment property located in San Jose, California and the Company's interest had a basis of $8.4 million at September 30, 2017.  Both properties were funded with long-term, non-recourse secured loans from the partner.  The mortgage loan on Nexus Sawgrass has a current unconsolidated outstanding balance of $48.6 million, bears interest at 5.60% and matures January 1, 2021.  The mortgage loan on Domain has a current unconsolidated outstanding balance of $96.8 million, bears interest at 5.75% and matures January 1, 2022.  While the Company is the managing member of both of the joint ventures, the joint venture partner has significant participating rights and has active involvement in and oversight of the operations.  As a result, the entities do not qualify as VIEs.  The Company alone does not have the power to direct the activities of the entities that most significantly impact the entities' economic performance and as a result, the entities are unconsolidated and recorded using the equity method of accounting.

Other

As the sole general partner of ERPOP, EQR has exclusive control of ERPOP's day-to-day management.  The limited partners are not able to exercise substantive kick-out or participating rights.  As a result, ERPOP qualifies as a VIE.  EQR has a controlling financial interest in ERPOP and, thus, is ERPOP's primary beneficiary.  EQR has the power to direct the activities of ERPOP that most significantly impact ERPOP's economic performance as well as the obligation to absorb losses or the right to receive benefits from ERPOP that could potentially be significant to ERPOP.  As a result, ERPOP is required to be consolidated on EQR's financial statements.

The Company agreed to a maximum investment of $5.0 million each for two private equity funds, both of which primarily focus on real estate technology investments.  The Company accounts for both investments under the equity method of accounting.  As of

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September 30, 2017, the Company’s interest in these investments had a combined basis of $1.6 million.

On February 27, 2013, in connection with the acquisition of Archstone, subsidiaries of the Company entered into three limited liability company agreements (collectively, the “Residual JV”).  The Residual JV owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation.  The Residual JV is owned 60% by the Company and 40% by its joint venture partner.  TheCompany's basis at September 30, 2017 was a net obligation of $0.4 million.  The Residual JV is managed by a Management Committee consisting of two members from each of the Company and its joint venture partner.  Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners.  As a result, the Residual JV does not qualify as a VIE.  The Company alone does not have the power to direct the activities of the Residual JV that most significantly impact the Residual JV's economic performance and as a result, the Residual JV is unconsolidated and recorded using the equity method of accounting.  The Residual JV has sold all of the real estate assets that were acquired as part of the acquisition of Archstone, including all of the German assets, and is in the process of winding down all remaining activities.

On February 27, 2013, in connection with the acquisition of Archstone, a subsidiary of the Company entered into a limited liability company agreement (the “Legacy JV”), through which they assumed obligations of Archstone in the form of preferred interests, some of which are governed by tax protection arrangements.  At September 30, 2017, the remaining preferred interests had an aggregate liquidation value of $37.4 million, our share of which is included in other liabilities in the accompanying consolidated balance sheets.  Obligations of the Legacy JV are borne 60% by the Company and 40% by its joint venture partner.  The Legacy JV is managed by a Management Committee consisting of two members from each of the Company and its joint venture partner.  Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners.  As a result, the Legacy JV does not qualify as a VIE.  The Company alone does not have the power to direct the activities of the Legacy JV that most significantly impact the Legacy JV's economic performance and as a result, the Legacy JV is unconsolidated and recorded using the equity method of accounting.

7. Deposits – Restricted and Escrow Deposits – Mortgage

The following table presents the Company’s restricted deposits as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017		December 31, 2016
Tax-deferred (1031) exchange proceeds	$	—	$	38,847
Restricted deposits on real estate investments		61		733
Resident security and utility deposits		35,667		37,007
Other		911		359
Totals	$	36,639	$	76,946

The following table presents the Company’s escrow deposits for mortgages as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017		December 31, 2016
Real estate taxes and insurance	$	556	$	2,003
Replacement reserves		7,969		3,428
Mortgage principal reserves/sinking funds		1,595		58,652
Other		852		852
Totals	$	10,972	$	64,935

During the nine months ended September 30, 2017, the Company received approximately $60.5 million from the return of various mortgage principal reserves/sinking funds on certain tax-exempt mortgage bond deals.

8. Debt

EQRdoesnothaveanyindebtednessasalldebtisincurredbytheOperatingPartnership.  EQRguaranteestheOperating Partnership’srevolvingcreditfacilityuptothemaximumamountandforthefulltermofthefacility.  

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Mortgage Notes Payable

As of September 30, 2017, the Company had outstanding mortgage debt of approximately $3.6 billion.  

During the nine months ended September 30, 2017, the Company:

• Repaid $300.0 million of 5.987% mortgage debt held in a Fannie Mae loan pool maturing in 2019 and incurred a prepayment penalty of approximately $10.8 million;

• Repaid $193.4 million of conventional fixed-rate mortgage loans maturing in 2017 through 2048 and incurred a prepayment penalty of approximately $1.5 million; and

• Repaid $8.8 million of scheduled principal repayments on various mortgage debt.

The Company recorded $0.3 million of write-offs of unamortized deferred financing costs during the nine months ended September 30, 2017 as additional interest expense related to debt extinguishment of mortgages.  The Company also recorded $0.7 million of write-offs of net unamortized premiums during the nine months ended September 30, 2017 as a reduction of interest expense related to debt extinguishment of mortgages.

As of September 30, 2017, the Company had $598.7 million of secured debt subject to third party credit enhancement.

Asof September 30, 2017,scheduledmaturitiesfortheCompany’soutstandingmortgageindebtednesswereatvariousdates through May 28, 2061.  At September 30, 2017, the interest rate range on the Company’s mortgage debt was 0.10% to 6.90%.  During the nine months ended September 30, 2017, the weighted average interest rate on the Company’s mortgagedebt was 4.33%.

Notes

As of September 30, 2017, the Company had outstanding unsecured notes of approximately $5.1 billion.

During the nine months ended September 30, 2017, the Company:

• Repaid $394.1 million of 5.75% unsecured notes at maturity;

• Issued $400.0 million of ten-year 3.25% fixed rate public notes, receiving net proceeds of approximately $399.3 million before underwriting fees, hedge termination costs and other expenses, at an all-in effective interest rate of 3.32% after termination of four forward starting swaps in conjunction with the issuance (see Note 9 for further discussion); and

• Issued $300.0 million of thirty-year 4.00% fixed rate public notes, receiving net proceeds of approximately $293.2 million before underwriting fees and other expenses, at an all-in effective interest rate of 4.11%.

Asof September 30, 2017,scheduledmaturitiesfortheCompany’soutstandingnoteswereatvariousdatesthroughAugust 1, 2047.  At September 30, 2017, the interest rate range on the Company’s notes was 2.375% to 7.57%.  During the nine months ended September 30, 2017, the weighted average interest rate on the Company’s notes was 4.41%.

Line of Credit and Commercial Paper

On November 3, 2016, the Company replaced its existing $2.5 billion facility with a $2.0 billion unsecured revolving credit facility maturing January 10, 2022.  The Company has the ability to increase available borrowings by an additional $750.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments.  The interest rate on advances under the facility will generally be LIBOR plus a spread (currently 0.825%), or based on bids received from the lending group, and the Company pays an annual facility fee (currently 12.5 basis points).  Both the spread and the facility fee are dependent on the credit rating of the Company’s long term debt.

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OnFebruary2,2015,theCompanyenteredintoanunsecuredcommercialpapernoteprogramintheUnitedStates.  The Company may borrow up to a maximum of $500.0 million under this program subject to market conditions.  The notes will be soldundercustomarytermsintheUnitedStatescommercialpapernotemarketandwillrankparipassuwithalloftheCompany's otherunsecuredseniorindebtedness.  Asof September 30, 2017, there was a balance of$229.8 million outstanding on thecommercialpaperprogram ($230.0 million in principal outstanding net of an unamortized discount of $0.2 million).  Thenotesbearinterest at various floating rates with a weighted average of 1.37% for the nine months ended September 30, 2017 and a weighted average maturity of 18 days as of September 30, 2017.

Asof September 30, 2017,theamountavailableontherevolvingcreditfacilitywas$1.76billion(netof$11.1millionwhich wasrestricted/dedicatedtosupportlettersofcredit and net of $230.0 million in principal outstanding on the commercial paper program).

Other

On April 24, 2017, the Company executed a new letter of credit facility with a third party financial institution which is not backed by or collateralized by borrowings on the Company’s unsecured revolving credit facility.  As of September 30, 2017, there was $9.0 million in letters of credit outstanding on this facility.

9. Derivative and Other Fair ValueInstruments

The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments.  The Company, where possible, bases the fair values of its financial instruments, including its derivative instruments, on listed market prices and third party quotes.  Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments.

In the normal course of business, the Company is exposed to the effect of interest rate changes.  The Company seeks to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments.  The Company may also use derivatives to manage commodity prices in the daily operations of the business.

Athree-levelvaluationhierarchyexistsfordisclosureoffairvaluemeasurements.  Thevaluationhierarchyisbasedupon thetransparencyofinputstothevaluationofanassetorliabilityasofthemeasurementdate.  Afinancialinstrument’scategorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels are defined asfollows:

• Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.

• Level 2 – Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

• Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair valuemeasurement.

The Company’s derivative positions are valued using models developed by the respective counterparty as well as models developed internally by the Company that use as their basis readily observable market parameters (such as forward yield curves and credit default swap data).  Employee holdings other than Common Shares within the supplemental executive retirement plan (the “SERP”) are valued using quoted market prices for identical assets and are included in other assets and other liabilities on the consolidated balance sheets.  Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners are valued using the quoted market price of Common Shares.  The fair values disclosed for mortgage notes payable and unsecured debt (including its commercial paper) were calculated using indicative rates provided by lenders of similar loans in the case of mortgage notes payable and the private unsecured debt (including its commercial paper) and quoted market prices for each underlying issuance in the case of the public unsecured notes.

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The fair values of the Company’s financial instruments (other than mortgage notes payable, unsecured notes, commercial paper, line of credit and derivative instruments), including cash and cash equivalents and other financial instruments, approximate their carrying or contract value.  Thefollowingtableprovidesasummaryofthe carrying andfairvaluesforthe Company’s mortgage notes payable and unsecured debt (including its commercial paper and line of credit, if applicable) at September 30, 2017 and December 31, 2016, respectively (amounts inthousands):

	September 30, 2017				December 31, 2016
	Estimated Fair Value (Level 2)		Carrying Value		Estimated Fair Value (Level 2)		Carrying Value
Mortgage notes payable, net	$	3,630,477	$	3,619,180	$	4,161,001	$	4,119,181
Unsecured debt, net		5,640,095		5,373,092		5,030,330		4,868,077
Total debt, net	$	9,270,572	$	8,992,272	$	9,191,331	$	8,987,258

ThefollowingtablesummarizestheCompany’sconsolidatedderivativeinstrumentsat September 30, 2017 (dollaramounts are inthousands):

	Fair Value Hedges (1)			Forward Starting Swaps (2)
Current Notional Balance	$	450,000		$	250,000
Lowest Interest Rate		2.375	%		2.1478	%
Highest Interest Rate		2.375	%		2.2895	%
Earliest Maturity Date		2019			2028
Latest Maturity Date		2019			2029

(1) Fair Value Hedges – Converts outstanding fixed rate unsecured notes ($450.0 million 2.375% notes due July 1, 2019) to a floating interest rate of 90-Day LIBOR plus 0.61%.

(2) Forward Starting Swaps – Designed to partially fix interest rates in advance of planned future debt issuances.  Of the $250.0 million notional balance, $200.0 million of these swaps have mandatory counterparty terminations in 2019 and are targeted for 2018 debt issuances while $50.0 million of these swaps have mandatory counterparty terminations in 2020 and are targeted for 2019 debt issuances.

Thefollowingtablesprovideasummaryofthefairvaluemeasurementsforeachmajorcategoryofassetsandliabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at September 30, 2017 and December 31, 2016, respectively (amounts inthousands):

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	9/30/2017		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	444	$	—	$	444	$	—
Forward Starting Swaps	Other Assets		3,921		—		3,921		—
Supplemental Executive Retirement Plan	Other Assets		136,774		136,774		—		—
Total		$	141,139	$	136,774	$	4,365	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	136,774	$	136,774	$	—	$	—
Total		$	136,774	$	136,774	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	380,541	$	—	$	380,541	$	—

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				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	12/31/2016		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	1,857	$	—	$	1,857	$	—
Supplemental Executive Retirement Plan	Other Assets		124,420		124,420		—		—
Total		$	126,277	$	124,420	$	1,857	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	124,420	$	124,420	$	—	$	—
Total		$	124,420	$	124,420	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	442,092	$	—	$	442,092	$	—

ThefollowingtablesprovideasummaryoftheeffectoffairvaluehedgesontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months ended September 30, 2017 and 2016, respectively (amounts in thousands):

September 30, 2017 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative			Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	(1,413	)	Fixed rate debt	Interest expense	$	1,413
Total		$	(1,413	)			$	1,413

September 30, 2016 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative		Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	4,563	Fixed rate debt	Interest expense	$	(4,563	)
Total		$	4,563			$	(4,563	)

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ThefollowingtablesprovideasummaryoftheeffectofcashflowhedgesontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months ended September 30, 2017 and 2016, respectively (amounts in thousands):

	Effective Portion						Ineffective Portion
September 30, 2017 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative		Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	5,216	Interest expense	$	(14,019	)	N/A	$	—
Total	$	5,216		$	(14,019	)		$	—

	Effective Portion							Ineffective Portion
September 30, 2016 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	(4,240	)	Interest expense	$	(37,262	)	N/A	$	—
Total	$	(4,240	)		$	(37,262	)		$	—

Asof September 30, 2017 andDecember 31, 2016,therewereapproximately$94.7millionand$113.9millionindeferred losses, net, included in accumulated other comprehensive (loss), respectively, related to derivative instruments.  Based on the estimatedfairvaluesofthenetderivativeinstrumentsat September 30, 2017,theCompanymayrecognizeanestimated$21.4million of accumulated other comprehensive (loss) as additional interest expense during the twelve months ending September 30,2018.

In August 2017, the Company received $1.3 million to settle four forward starting ten-year swaps in conjunction with the issuance of $400.0 million of ten-year fixed rate public notes.  The entire $1.3 million was initially deferred as a component of accumulated other comprehensive (loss) and will be recognized as a decrease to interest expense over the ten-year term of the notes.

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10. Earning Per Share and Earnings PerUnit

Equity Residential

Thefollowingtablessetforththecomputationofnetincomepershare–basicandnetincomepershare–dilutedforthe Company (amounts in thousands except per shareamounts):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Numerator for net income per share – basic:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Allocation to Noncontrolling Interests – Operating    Partnership, net		(17,931	)		(160,437	)		(5,166	)		(8,344	)
Net (income) attributable to Noncontrolling    Interests – Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to    Common Shares, net of Noncontrolling Interests		475,694			4,012,476			137,457			207,306
Discontinued operations, net of Noncontrolling Interests		—			119			—			237
Numerator for net income per share – basic	$	475,694		$	4,012,595		$	137,457		$	207,543
Numerator for net income per share – diluted:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Net (income) attributable to Noncontrolling    Interests – Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to Common Shares		493,625			4,172,913			142,623			215,650
Discontinued operations, net		—			124			—			246
Numerator for net income per share – diluted	$	493,625		$	4,173,037		$	142,623		$	215,896
Denominator for net income per share – basic and diluted:
Denominator for net income per share – basic		366,809			364,917			366,996			365,109
Effect of dilutive securities:
OP Units		12,907			13,828			12,910			13,899
Long-term compensation shares/units		2,924			3,539			3,039			3,365
Denominator for net income per share – diluted		382,640			382,284			382,945			382,373
Net income per share – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per share – diluted	$	1.29		$	10.92		$	0.37		$	0.56
Net income per share – basic:
Income from continuing operations available to    Common Shares, net of Noncontrolling Interests	$	1.30		$	11.00		$	0.37		$	0.57
Discontinued operations, net of Noncontrolling Interests		—			—			—			—
Net income per share – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per share – diluted:
Income from continuing operations available to Common Shares	$	1.29		$	10.92		$	0.37		$	0.56
Discontinued operations, net		—			—			—			—
Net income per share – diluted	$	1.29		$	10.92		$	0.37		$	0.56

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ERP Operating Limited Partnership

The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Numerator for net income per Unit – basic and diluted:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Net (income) attributable to Noncontrolling Interests – Partially    Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Allocation to Preference Units		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to Units		493,625			4,172,913			142,623			215,650
Discontinued operations, net		—			124			—			246
Numerator for net income per Unit – basic and diluted	$	493,625		$	4,173,037		$	142,623		$	215,896
Denominator for net income per Unit – basic and diluted:
Denominator for net income per Unit – basic		379,716			378,745			379,906			379,008
Effect of dilutive securities:
Dilution for Units issuable upon assumed exercise/vesting    of the Company’s long-term compensation shares/units		2,924			3,539			3,039			3,365
Denominator for net income per Unit – diluted		382,640			382,284			382,945			382,373
Net income per Unit – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per Unit – diluted	$	1.29		$	10.92		$	0.37		$	0.56
Net income per Unit – basic:
Income from continuing operations available to Units	$	1.30		$	11.00		$	0.37		$	0.57
Discontinued operations, net		—			—			—			—
Net income per Unit – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per Unit – diluted:
Income from continuing operations available to Units	$	1.29		$	10.92		$	0.37		$	0.56
Discontinued operations, net		—			—			—			—
Net income per Unit – diluted	$	1.29		$	10.92		$	0.37		$	0.56

11. IndividuallySignificantDispositions

The Company executed an agreement with controlled affiliates of Starwood Capital Group ("Starwood") on October 23, 2015 to sell a portfolio of 72 operating properties consisting of 23,262 apartment units located in five markets across the United States for $5.365 billion (the "Starwood Transaction" or “Starwood Portfolio”).  The Starwood Portfolio represented substantially all of the assets in the Company’s South Florida and Denver markets and certain suburban assets in the Washington D.C., Seattle and Los Angeles markets.  On January 26 and 27, 2016, the Company closed on the sale of the entire portfolio described above.

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The Company concluded that the Starwood Transaction did not qualify for discontinued operations reporting as it did not represent a strategic shift that had a major effect on the Company’s operations and financial results.  The Company has been investing only in its six coastal markets (Boston, New York, Washington D.C., Southern California, San Francisco and Seattle) and has not been acquiring or developing any new assets in its other markets.  Over the past several years, the Company has been repositioning its portfolio by selling its suburban assets located in markets outside its six core coastal markets.  The sale of the Starwood Portfolio represented the continuation of the above strategy.  However, the Company concluded that the Starwood Transaction did qualify as an individually significant component of the Company as the amount received upon disposal exceeded10%of total assets, and NOI (see definition in Note 13) of the Starwood Portfolio represented approximately 1.6% of consolidated NOI (for the approximate one-month period owned in 2016) for the nine months ended September 30, 2016 and approximately 15.7% of consolidated NOI for the year ended December 31, 2015.  As a result, the following table summarizes the results of operations attributable to the Starwood Transaction for the nine months and quarter ended September 30, 2016 (amounts in thousands):

	Nine Months Ended			Quarter Ended
	September 30, 2016			September 30, 2016
REVENUES
Rental income	$	30,660		$	239
Total revenues		30,660			239
EXPENSES
Property and maintenance		7,839			(84	)
Real estate taxes and insurance		2,933			1
Property management		2			—
General and administrative		19			4
Total expenses		10,793			(79	)
Operating income		19,867			318
Interest and other income		21			10
Interest:
Expense incurred, net		(380	)		(6	)
Amortization of deferred financing costs		(707	)		—
Income and other tax (expense) benefit		(1	)		—
Net gain (loss) on sales of real estate properties		3,161,097			(103	)
Income from operations attributable to controlling    interests – Operating Partnership		3,179,897			219
Income from operations attributable to Noncontrolling    Interests – Operating Partnership		(122,146	)		(8	)
Income from operations attributable to controlling    interests – Company	$	3,057,751		$	211

12. Commitments andContingencies

The Company, as an owner of real estate, is subject to various Federal, state and local environmental laws.  Compliance by the Company with existing laws has not had a material adverse effect on the Company.  However, the Company cannot predict the impact of new or changed laws or regulations on its current properties or on properties that it may acquire in the future.  As of September 30, 2017, the Company does have environmental reserves totaling approximately $5.7 million related to two of its properties.

TheCompanyhasestablishedareserverelatedtovariouslitigationmattersassociatedwithitsMassachusettsproperties and periodically assesses the adequacy of the reserve and makes adjustments as necessary.  As of September 30, 2017,the reserve totaled approximately $0.9million.  While no assurances can be given, the Company does not believe that the ultimate resolution of any of these remaining litigation matters, if adversely determined, would have a material adverse effect on the Company.

The Company does not believe there is any other litigation pending or threatened against it that, individually or in the aggregate, may reasonably be expected to have a material adverse effect on the Company.

As of September 30, 2017, the Company has four wholly owned projects totaling 1,285 apartment units in various stages of development with commitments to fund of approximately $127.3 million and estimated completion dates ranging through September 30, 2019, as well as other completed development projects that are in various stages of lease up or are stabilized.

Asof September 30, 2017,theCompanyhastwounconsolidatedoperating properties (Nexus Sawgrass and Domain) that are owned with the same third party joint venture partner.  The joint venture agreementswiththispartnerareprimarilydeal-specific

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regardingprofit-sharing,equitycontributions,returnsoninvestment,buy-sell agreements and other customary provisions.  Thebuy-sellarrangementscontainprovisionsthatprovide the right, but not the obligation, for the Company to acquire the partner’s interests or sell its interests at any time following the occurrence of certain pre-defined events described in the joint venture agreements.  See Note 6 for further discussion.

13. ReportableSegments

Operating segments are defined as components of an enterprise that engage in business activities from which they may earn revenues and incur expenses and about which discrete financial information is available that is evaluated regularly by the chiefoperatingdecisionmaker.  Thechiefoperatingdecisionmakerdecideshowresourcesareallocatedandassessesperformance on a recurring basis at leastquarterly.

The Company’s primary business is the acquisition, development and management of multifamily residential properties, which includes the generation of rental and other related income through the leasing of apartment units to residents.  The chief operating decision maker evaluates the Company's operating performance geographically by market and both on a same store and non-same store basis.  The Company’s same store operating segments located in its coastal markets represent its reportable segments.  The Company's operating segments located in its other markets (Phoenix) that are not material have also been included in the tables presented below.  

The Company’s fee and asset management and development activities are other business activities that do not constitute an operating segment and as such, have been aggregated in the "Other" category in the tables presented below.

Allrevenuesarefromexternalcustomersandthereisnocustomerwhocontributed10%ormoreoftheCompany’stotal revenues during the nine months and quarters ended September 30, 2017 and 2016, respectively.

The primary financial measure for the Company’s rental real estate segment is net operating income (“NOI”), which representsrentalincomeless:1) propertyandmaintenanceexpenseand2) realestatetaxesandinsuranceexpense(allasreflected in the accompanying consolidated statements of operations and comprehensive income).  TheCompanybelievesthat NOI is helpful to investors as a supplemental measure of its operating performance because it is a direct measure of the actual operating results of the Company’s apartment properties.  Revenues for all leases are reflected on a straight-line basis in accordance with GAAP for the current and comparable periods.

ThefollowingtablepresentsareconciliationofNOIfromourrentalrealestatespecifictocontinuingoperationsforthe nine months and quarters ended September 30, 2017 and 2016, respectively (amounts inthousands):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Rental income	$	1,840,170		$	1,816,960		$	623,951		$	605,856
Property and maintenance expense		(306,645	)		(309,688	)		(104,721	)		(104,216	)
Real estate taxes and insurance expense		(253,318	)		(238,954	)		(84,087	)		(81,343	)
Total operating expenses		(559,963	)		(548,642	)		(188,808	)		(185,559	)
Net operating income	$	1,280,207		$	1,268,318		$	435,143		$	420,297

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The following tables present NOI for each segment from our rental real estate specific to continuing operations for the nine months and quarters ended September 30, 2017 and 2016,respectively,aswellastotalassetsandcapitalexpendituresat September 30, 2017(amounts inthousands):

	Nine Months Ended September 30, 2017							Nine Months Ended September 30, 2016
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	296,345	$	83,927	$	212,418		$	285,463	$	83,459	$	202,004
Orange County		66,081		16,355		49,726			63,005		15,529		47,476
San Diego		66,052		17,386		48,666			63,171		16,884		46,287
Subtotal - Southern California		428,478		117,668		310,810			411,639		115,872		295,767
Washington DC		322,307		98,043		224,264			317,879		95,187		222,692
New York		345,656		126,226		219,430			345,434		120,390		225,044
San Francisco		283,654		69,053		214,601			277,666		68,246		209,420
Boston		170,545		47,538		123,007			168,118		47,308		120,810
Seattle		133,279		37,205		96,074			125,910		34,979		90,931
Other Markets		1,384		499		885			1,342		428		914
Total same store		1,685,303		496,232		1,189,071			1,647,988		482,410		1,165,578
Non-same store/other (2) (3)
Non-same store		144,975		53,367		91,608			78,287		29,173		49,114
Other (3)		9,892		10,364		(472	)		90,685		37,059		53,626
Total non-same store/other		154,867		63,731		91,136			168,972		66,232		102,740
Totals	$	1,840,170	$	559,963	$	1,280,207		$	1,816,960	$	548,642	$	1,268,318

(1) For the nine months ended September 30, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,285 apartmentunits.

(2) For the nine months ended September 30, 2017 and 2016, non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1,2016.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operationscriteria.

	Quarter Ended September 30, 2017							Quarter Ended September 30, 2016
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	102,566	$	27,768	$	74,798		$	98,542	$	29,362	$	69,180
Orange County		22,427		5,500		16,927			21,455		5,362		16,093
San Diego		22,432		5,867		16,565			21,516		5,740		15,776
Subtotal - Southern California		147,425		39,135		108,290			141,513		40,464		101,049
New York		125,351		46,219		79,132			124,709		44,223		80,486
Washington DC		108,763		33,459		75,304			107,340		32,817		74,523
San Francisco		98,805		24,875		73,930			97,259		24,487		72,772
Boston		57,071		16,351		40,720			56,368		16,399		39,969
Seattle		49,268		13,647		35,621			46,948		12,493		34,455
Other Markets		459		158		301			457		136		321
Total same store		587,142		173,844		413,298			574,594		171,019		403,575
Non-same store/other (2) (3)
Non-same store		33,974		10,371		23,603			14,128		6,120		8,008
Other (3)		2,835		4,593		(1,758	)		17,134		8,420		8,714
Total non-same store/other		36,809		14,964		21,845			31,262		14,540		16,722
Totals	$	623,951	$	188,808	$	435,143		$	605,856	$	185,559	$	420,297

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(1) For the quarters ended September 30, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to July 1, 2016, less properties subsequently sold, which represented 72,049 apartmentunits.

(2) For the quarters ended September 30, 2017 and 2016, non-same store primarily includes properties acquired after July 1, 2016, plus any properties in lease-up and not stabilized as of July 1,2016.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operationscriteria.

	Nine Months Ended September 30,
	Total Assets		Capital Expenditures
Same store (1)
Los Angeles	$	2,620,672	$	18,952
Orange County		330,580		6,671
San Diego		425,241		3,776
Subtotal - Southern California		3,376,493		29,399
Washington DC		3,836,992		26,308
New York		4,181,890		23,547
San Francisco		2,480,069		25,896
Boston		1,670,467		18,906
Seattle		1,172,356		15,499
Other Markets		12,778		83
Total same store		16,731,045		139,638
Non-same store/other (2) (3)
Non-same store		3,080,697		3,206
Other (3)		886,091		414
Total non-same store/other		3,966,788		3,620
Totals	$	20,697,833	$	143,258

(1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,285 apartmentunits.

(2) Non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1,2016.

(3) Other includes development, other corporate operations and capital expenditures for propertiessold.

14. SubsequentEvents

Subsequent to September 30, 2017, the Company repaid $103.9 million of 7.125% unsecured notes at maturity.

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Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

For further information including definitions for capitalized terms not defined herein, refer to the consolidated financial statements and footnotes thereto included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

Forward-Looking Statements

Forward-looking statements are intended to be made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.  These statements are based on current expectations, estimates, projections and assumptions made by management.  While the Company's management believes the assumptions underlying its forward-looking statements are reasonable, such information is inherently subject to uncertainties and may involve certain risks, which could cause actual results, performance or achievements of the Company to differ materially from anticipated future results, performance or achievements expressed or implied by such forward-looking statements.  Many of these uncertainties and risks are difficult to predict and beyond management's control.  Forward-looking statements are not guarantees of future performance, results or events.  The forward-looking statements contained herein are made as of the date hereof and the Company undertakes no obligation to update or supplement these forward-looking statements.  Factors that might cause such differences include, but are not limited to the following:

• We intend to actively acquire, develop and rehab multifamily properties for rental operations as market conditions dictate.  We may also acquire multifamily properties that are unoccupied or in the early stages of lease up.  We may be unable to lease up these apartment properties on schedule, resulting in decreases in expected rental revenues and/or lower yields due to lower occupancy and rental rates as well as higher than expected concessions or higher than expected operating expenses.  We may not be able to achieve rents that are consistent with expectations for acquired, developed or rehabbed properties.  We may underestimate the costs necessary to bring an acquired property up to standards established for its intended market position, to complete a development property or to complete a rehab.  Additionally, we expect that other real estate investors with capital will compete with us for attractive investment opportunities or may also develop properties in markets where we focus our development and acquisition efforts.  This competition (or lack thereof) may increase (or depress) prices for multifamily properties.  We may not be in a position or have the opportunity in the future to make suitable property acquisitions on favorable terms.  We have acquired in the past and intend to continue to pursue the acquisition of properties, including large portfolios of properties, that could increase our size and result in alterations to our capital structure.  The total number of apartment units under development, costs of development and estimated completion dates are subject to uncertainties arising from changing economic conditions (such as the cost of labor and construction materials), competition and local government regulation;

• Debt financing and other capital required by the Company may not be available or may only be available on adverse terms;

• Labor and materials required for maintenance, repair, capital expenditure or development may be more expensive than anticipated;

• Occupancy levels and market rents may be adversely affected by national and local political, economic and market conditions including, without limitation, new construction and excess inventory of multifamily and owned housing/ condominiums, increasing portions of owned housing/condominium stock being converted to rental use, rental housing subsidized by the government, other government programs that favor single family rental housing or owner occupied housing over multifamily rental housing, slow or negative employment growth and household formation, the availability of low-interest mortgages or the availability of mortgages requiring little or no down payment for single family home buyers, changes in social preferences, governmental regulations (including rent control legislation and restrictions) and the potential for geopolitical instability, all of which are beyond the Company's control; and

• Additional factors as discussed in Part I of the Company’s and the Operating Partnership’s Annual Report on Form 10-K, particularly those under “Item 1A Risk Factors”.

Forward-looking statements and related uncertainties are also included in the Notes to Consolidated Financial Statements in this report.

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Overview

Equity Residential (“EQR”), a Maryland real estate investment trust (“REIT”) formed in March 1993, is an S&P 500 company focused on the acquisition, development and management of rental apartment properties in urban and high-density suburban coastal gateway markets where today's renters want to live, work and play.  ERP Operating Limited Partnership (“ERPOP”), an Illinois limited partnership, was formed in May 1993 to conduct the multifamily residential property business of Equity Residential.  EQR has elected to be taxed as a REIT.  References to the “Company,” “we,” “us” or “our” mean collectively EQR, ERPOP and those entities/subsidiaries owned or controlled by EQR and/or ERPOP.  References to the “Operating Partnership” mean collectively ERPOP and those entities/subsidiaries owned or controlled by ERPOP.

EQR is the general partner of, and as of September 30, 2017 owned an approximate 96.4% ownership interest in, ERPOP.  All of the Company’s property ownership, development and related business operations are conducted through the Operating Partnership and EQR has no material assets or liabilities other than its investment in ERPOP.  EQR issues equity from time to time, the net proceeds of which it is obligated to contribute to ERPOP, but does not have any indebtedness as all debt is incurred by the Operating Partnership.  The Operating Partnership holds substantially all of the assets of the Company, including the Company’s ownership interests in its joint ventures.  The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity.

The Company’s corporate headquarters is located in Chicago, Illinois and the Company also operates property management offices in each of its six core coastal markets.  As of September 30, 2017, the Company had approximately 2,700 employees who provided real estate operations, leasing, legal, financial, accounting, acquisition, disposition, development and other support functions.

Available Information

You may access our Annual Report on Form 10-K, our Quarterly Reports on Form 10-Q, our Current Reports on Form 8- K and any amendments to any of those reports we file with the SEC free of charge at our website, www.equityapartments.com.  These reports are made available at our website as soon as reasonably practicable after we file them with the SEC.  The information contained on our website, including any information referred to in this report as being available on our website, is not a part of or incorporated into this report.

Business Objectives and Operating and Investing Strategies

The Company’s and the Operating Partnership’s business objectives and operating and investing strategies have not changed from the information included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

Results of Operations

Third Quarter 2017 Transactions

In conjunction with our business objectives and operating strategy, the Company continued to invest in apartment properties located in our six coastal markets and sell apartment properties located primarily in the less dense portion of suburban markets and/or properties that are functionally or locationally challenged during the quarter ended September 30, 2017 as follows:

• Acquired three consolidated apartment properties, located in Boston, Los Angeles and Bellevue, Washington, consisting of 811 apartment units for approximately $411.0 million, at a weighted average Acquisition Cap Rate (see Definitions section below) of 4.8%;

• Sold one consolidated apartment property in San Diego consisting of 120 apartment units for approximately $53.0 million, at a  Disposition Yield (see Definitions section below) of 4.3% and generating an Unlevered IRR (see Definitions section below) of 10.1%; and

• Substantially completed construction on two projects in Washington, D.C. and Seattle consisting of 572 apartment units totaling approximately $300.4 million of development costs.

See also Note 4 in the Notes to Consolidated Financial Statements for additional discussion regarding the Company’s real estate transactions.

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Same Store Results

Properties that the Company owned and were stabilized (see definition below) for all of both of the nine months ended September 30, 2017 and 2016 (the “Nine-Month 2017 Same Store Properties”), which represented 70,285 apartment units, and properties that the Company owned and were stabilized for all of both of the quarters ended September 30, 2017 and 2016 (the “Third Quarter 2017 Same Store Properties”), which represented 72,049 apartment units, impacted the Company’s results of operations.  Both the Nine-Month 2017 Same Store Properties and the Third Quarter 2017 Same Store Properties are discussed in the following paragraphs.

The Company's primary financial measure for evaluating each of its apartment communities is net operating income (“NOI”).  NOI represents rental income less direct property operating expenses (including real estate taxes and insurance).  The Company believes that NOI is helpful to investors as a supplemental measure of its operating performance because it is a direct measure of the actual operating results of the Company’s apartment properties.

The following tables provide a rollforward of the apartment units included in Same Store Properties and a reconciliation of apartment units included in Same Store Properties to those included in Total Properties for the nine months and quarter ended September 30, 2017:

	Nine Months Ended						Quarter Ended
	September 30, 2017						September 30, 2017
	Properties			Apartment Units			Properties			Apartment Units
Same Store Properties at Beginning of Period		272			69,879			282			71,354
2015 acquisitions		4			625			—			—
2017 dispositions		(4	)		(1,024	)		(1	)		(120	)
Lease-up properties stabilized		4			800			3			810
Other		—			5			—			5
Same Store Properties at September 30, 2017		276			70,285			284			72,049

	Nine Months Ended				Quarter Ended
	September 30, 2017				September 30, 2017
	Properties		Apartment Units		Properties		Apartment Units
Same Store		276		70,285		284		72,049
Non-Same Store:
2017 acquisitions - stabilized		2		437		2		437
2017 acquisitions - not stabilized		2		510		2		510
2016 acquisitions		4		573		1		94
Properties removed from same store (1)		2		356		2		356
Master-Leased properties (2)		3		853		3		853
Lease-up properties not yet stabilized (3)		13		4,342		8		3,057
Other		1		1		1		1
Total Non-Same Store		27		7,072		19		5,308
Unconsolidated properties		2		945		2		945
Total Properties and Apartment Units		305		78,302		305		78,302

Note: Properties are considered "stabilized" when they have achieved 90% occupancy for three consecutive months.  Properties are included in Same Store when they are stabilized for all of the current and comparable periods presented.

(1) Consists of one property containing 285 apartment units (Playa Pacifica in Hermosa Beach, California) which was removed from the same store portfolio in the first quarter of 2015 due to a major renovation in which significant portions of the property were taken offline for extended time periods and one property containing 71 apartment units (Acton Courtyard in Berkeley, California) which was removed from the same store portfolio in the third quarter of 2016 due to an affordable housing dispute which required significant portions of the property to be vacant for an extended releasing period.  As of September 30, 2017 and 2016, Playa Pacifica had an occupancy of 95.8% and 63.0%, respectively.  As of September 30, 2017 and 2016, Acton Courtyard had an occupancy of 93.0% and 67.6%, respectively.  These properties will not return to the same store portfolio until they are stabilized for all of the current and comparable periods presented.

(2) Consists of three properties containing 853 apartment units that are wholly owned by the Company but the entire projects are master leased to a third party corporate housing provider.

(3) Consists of properties in various stages of lease-up and properties where lease-up has been completed but the properties were not stabilized for the comparable periods presented.

44

Revenues from the Nine-Month 2017 Same Store Properties increased $37.3 million primarily as a result of an increase in average rental rates charged to residents.  Expenses from the Nine-Month 2017 Same Store Properties increased $13.8 million primarily as a result of an increase in real estate taxes, on-site payroll costs, utilities and repairs and maintenance expenses.  The following tables provide comparative same store results and statistics for the Nine-Month 2017 Same Store Properties:

September YTD 2017 vs.  September YTD 2016

Same Store Results/Statistics for 70,285 Same Store Apartment Units

$ in thousands (except for Average Rental Rate)

	Results									Statistics
Description	Revenues			Expenses			NOI			Average Rental Rate (1)			Physical Occupancy (2)			Turnover (3)
YTD 2017	$	1,685,303		$	496,232		$	1,189,071		$	2,662			96.0	%		41.9	%
YTD 2016	$	1,647,988		$	482,410		$	1,165,578		$	2,601			96.0	%		43.6	%
Change	$	37,315		$	13,822		$	23,493		$	61			0.0	%		(1.7	)%
Change		2.3	%		2.9	%		2.0	%		2.3	%

Note: Same store revenues for all leases are reflected on a straight line basis in accordance with GAAP for the current and comparable periods.

(1) Average Rental Rate – Total residential rental revenues reflected on a straight-line basis in accordance with GAAP divided by the weighted average occupied apartment units for the reporting period presented.

(2) Physical Occupancy – The weighted average occupied apartment units for the reporting period divided by the average of total apartment units available for rent for the reporting period.

(3) Turnover – Total residential move-outs divided by total residential apartment units, including inter-property and intra-property transfers.

The following table provides comparative same store operating expenses for the Nine-Month 2017 Same Store Properties:

September YTD 2017 vs.  September YTD 2016

Same Store Operating Expenses for 70,285 Same Store Apartment Units

$ in thousands

											% of Actual
											YTD 2017
	Actual		Actual		$			%			Operating
	YTD 2017		YTD 2016		Change			Change			Expenses
Real estate taxes	$	208,482	$	201,645	$	6,837			3.4	%		42.0	%
On-site payroll (1)		112,607		107,514		5,093			4.7	%		22.7	%
Utilities (2)		67,788		66,472		1,316			2.0	%		13.7	%
Repairs and maintenance (3)		64,170		62,952		1,218			1.9	%		12.9	%
Insurance		12,526		13,024		(498	)		(3.8	)%		2.5	%
Leasing and advertising		7,034		7,579		(545	)		(7.2	)%		1.4	%
Other on-site operating expenses (4)		23,625		23,224		401			1.7	%		4.8	%
Same store operating expenses	$	496,232	$	482,410	$	13,822			2.9	%		100.0	%

(1) On-site payroll – Includes payroll and related expenses for on-site personnel including property managers, leasing consultants and maintenance staff.

(2) Utilities – Represents gross expenses prior to any recoveries under the Resident Utility Billing System (“RUBS”).  Recoveries are reflected in rental income.

(3) Repairs and maintenance – Includes general maintenance costs, apartment unit turnover costs including interior painting, routine landscaping, security, exterminating, fire protection, snow removal, elevator, roof and parking lot repairs and other miscellaneous building repair and maintenance costs.

(4) Other on-site operating expenses – Includes ground lease costs and administrative costs such as office supplies, telephone and data charges and association and business licensing fees.

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The following tables present reconciliations of operating income per the consolidated statements of operations to NOI, along with rental income, operating expenses and NOI per the consolidated statements of operations allocated between same store and non-same store/other results for the nine months ended September 30, 2017 and 2016 (amounts in thousands):

	Nine Months Ended September 30,
	2017			2016
Operating income	$	632,707		$	632,016
Adjustments:
Fee and asset management revenue		(532	)		(3,351	)
Property management		64,702			64,003
General and administrative		40,366			47,408
Depreciation		542,964			528,242
Total NOI	$	1,280,207		$	1,268,318
Rental income:
Same store	$	1,685,303		$	1,647,988
Non-same store/other		154,867			168,972
Total rental income		1,840,170			1,816,960
Operating expenses:
Same store		496,232			482,410
Non-same store/other		63,731			66,232
Total operating expenses		559,963			548,642
NOI:
Same store		1,189,071			1,165,578
Non-same store/other		91,136			102,740
Total NOI	$	1,280,207		$	1,268,318

For properties that the Company acquired or completed that were stabilized prior to January 1, 2016 and that the Company expects to continue to own through December 31, 2017, the Company anticipates the following same store results for the full year ending December 31, 2017:

2017 Same Store Assumptions
Physical Occupancy		95.9%
Revenue change	2.2%
Expense change	3.2%
NOI change	1.8%

The Company anticipates consolidated rental acquisitions of $468.0 million and consolidated rental dispositions of $500.0 million and expects that the Acquisition Cap Rate will be 0.50% lower than the Disposition Yield for the full year ending December 31, 2017.  These 2017 assumptions are based on current expectations and are forward-looking.

Same store revenues increased 2.3% during the nine months ended September 30, 2017 as compared to the nine months ended September 30, 2016, which was ahead of our expectations primarily driven by gains in occupancy.  As a result, the Company now anticipates same store revenue growth of approximately 2.2% for 2017, as compared to the most recent updated guidance range of 1.75% to 2.25% that was provided in July 2017.  The Company’s primary goal in 2017 continues to focus on retaining existing residents to drive renewal rate growth, which came in at 4.6% for the nine months ended September 30, 2017 as compared to the same period in 2016.  Same store turnover declined by 1.7% for the nine months ended September 30, 2017 as compared to the same period in 2016.  With same store occupancy of 96.0% for the nine months ended September 30, 2017,we also increased our occupancy expectations for full year 2017 from 95.8% to 95.9%.

Washington D.C. was originally expected to post improved same store revenue results for 2017 as compared to 2016 because we expected continuing job growth to allow the elevated levels of new supply in this market to be absorbed.  During the second quarter of 2017, this job growth weakened, though it has modestly improved recently, with the impact from potential government spending initiatives still remaining unclear.  Same store revenues increased 1.4% in the nine months ended September 30, 2017 as compared to the same period in 2016, which was lower than our original February 2017 expectations.  We now expect to produce same store revenue growth of approximately 1.5% in 2017, which is relatively consistent with the prior year and slightly higher than our most recent expectation provided in July 2017 of an increase of 1.4% for this market.

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In the New York market, elevated deliveries of new luxury supply both in established residential areas and newer residential areas like Long Island City are having an impact on our ability to raise rents as renters begin to let go of neighborhood loyalty.  There has also been a reduction in the rate of job growth in the financial services sector and technology sector, which are important demand drivers in the market.  Due in part to our strong same store occupancy levels (96.1% for the nine months ended September 30, 2017), we have used fewer concessions during the nine months of 2017 than we originally expected and anticipate that trend to continue in the remaining three months of 2017.  As a result, same store revenues increased 0.1% in the nine months ended September 30, 2017 as compared to the same period in 2016, which was slightly above our expectations.  We still expect there to be a decline in same store revenues of approximately 0.1% for full year 2017, which is better than our most recent expectation provided in July 2017 of a decline of 0.3% for this market.

We have a cautious outlook for Boston as the market continues to feel the impact from an elevated level of deliveries of new supply in the downtown and Cambridge submarkets with approximately 50% of this new supply competing with our properties.  Job growth has continued to improve in the market which is a positive sign that the additional supply may be absorbed without significant disruption.  Same store revenues increased 1.4% in the nine months ended September 30, 2017 as compared to the same period in 2016, which was consistent with our expectations.  We expect to produce same store revenue growth of approximately 1.6% in 2017, which is slightly higher than our most recent expectation provided in July 2017 of an increase of 1.5% for this market.

Seattle is producing solid rental rate growth driven by the continued growth in technology jobs in the market, but showed signs of slowing rent growth during the quarter.  While new supply remains elevated in this market, until recently strong job growth has enabled that supply to be quickly absorbed with little market disruption.  Same store revenues increased 5.9% in the nine months ended September 30, 2017 as compared to the same period in 2016, which exceeded our expectations.  We expect Seattle to produce same store revenue growth of approximately 5.7% in 2017, which is slightly lower than our most recent expectation provided in July 2017 of an increase of 5.75% for this market.

San Francisco is producing a slower rate of job growth in the technology sector compared to previous years.  However, we continue to see strong demand throughout the market, although the rate at which we can increase rents remains somewhat modest due to new supply and a slower rate of job growth.  Same store revenues increased 2.2% in the nine months ended September 30, 2017 as compared to the same period in 2016, which was ahead of our expectations.  We expect to produce same store revenue growth of approximately 2.1% in 2017, which is better than our most recent expectation provided in July 2017 of an increase of 1.8% for this market.

Southern California, which includes Los Angeles, Orange County and San Diego, is performing well and is positioned to be one of our better performing markets in 2017.  Widely dispersed new supply, very good economic growth and adequate levels of job growth in the market are driving strong revenue growth.  Same store revenues increased 4.1% in the nine months ended September 30, 2017 as compared to the same period in 2016, which was above our expectations.  We expect to produce same store revenue growth of approximately 4.0%in 2017, which is slightly higher than our most recent expectation provided in July 2017 of an increase of 3.8% for this market.  We expect Orange County and San Diego to perform slightly better than Los Angeles for full year 2017 as compared to 2016.

Same store expenses increased 2.9% during the nine months ended September 30, 2017 as compared to the nine months ended September 30, 2016.  The Company now anticipates that 2017 same store expenses will increase 3.2%, as compared to the most recent guidance range of 3.25% to 4.0% that was provided in July 2017, significantly impacted by the following items:

• Real estate taxes increased 3.4% during the nine months ended September 30, 2017 as compared to the same period in 2016 and are now estimated to increase 3.4% for the full year 2017 as compared to 2016 (lower than the most recent guidance of 4.0% to 4.5% provided in July 2017), primarily driven by favorable real estate tax appeal results;

• Payroll costs increased 4.7% during the nine months ended September 30, 2017 as compared to the same period in 2016 and are estimated to increase 6.0% for the full year 2017 as compared to 2016 (consistent with the most recent guidance provided in July 2017), primarily due to an increase in on-site staffing to assure the service levels necessary to remain competitive with new supply, higher on-site wages due to competition from new supply and higher medical and workers compensation costs; and

• Utilities increased 2.0% during the nine months ended September 30, 2017 as compared to the same period in 2016 and are estimated to increase approximately 2.0% for the full year 2017 as compared to 2016 (consistent with the most recent guidance provided in July 2017), primarily due to moderate increases in natural gas costs, partially offset by lower gas usage and lower prices for electricity.

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Same store NOI increased 2.0% during the nine months ended September 30, 2017 as compared to the nine months ended September 30, 2016, which was ahead of our expectations.  As a result, the Company now anticipates same store NOI growth of approximately 1.8%, as compared to the most recent guidance range of 0.75% to 1.75% that was provided in July 2017, for the full year 2017 as a result of the above same store revenue and expense expectations.

For the quarter ended September 30, 2017, same store revenue increased $12.5 million or 2.2%, same store expenses increased $2.8 million or 1.7% and same store NOI increased $9.7 million or 2.4% when compared to the prior year period.  See also Note 13 in the Notes to Consolidated Financial Statements for additional discussion regarding the Company’s segment disclosures.

Non-Same Store/Other Results

Non-same store/other NOI results for the nine months ended September 30, 2017 decreased approximately $11.6 million compared to the same period of 2016 and consist primarily of properties acquired in calendar years 2016 and 2017, operations from the Company’s development properties and operations prior to disposition from 2016 and 2017 sold properties.  This difference is due primarily to:

• A positive impact of higher NOI from development and newly stabilized development properties in lease-up of $30.5 million;

• A positive impact of higher NOI from properties acquired in 2016 and 2017 of $6.6 million;

• A positive impact of higher NOI from other non-same store properties (including three master leased properties) of $1.8 million; and

• A negative impact of lost NOI from 2016 and 2017 dispositions of $48.4 million.

Comparison of the nine months and quarter ended September 30, 2017 to the nine months and quarter ended September 30, 2016

For the nine months ended September 30, 2017, the Company reported diluted earnings per share/unit of $1.29 compared to $10.92 per share/unit in the same period of 2016.  The difference is primarily due to approximately $9.78 per share/unit in higher gains on property sales and $0.14 per share/unit in higher gains on sales of non-operating assets in 2016 compared to 2017 as a direct result of the significant sales activity in 2016 compared to 2017, partially offset by $0.28 per share/unit in higher debt extinguishment costs incurred in 2016 as compared to 2017.  For the quarter ended September 30, 2017, the Company reported diluted earnings per share/unit of $0.37 compared to $0.56 per share/unit in the same period of 2016.  The difference is primarily due to approximately $0.22 per share/unit in higher gains on property sales in the third quarter of 2016 compared to the same period in 2017, partially offset by improved operations in the third quarter of 2017 as compared to the third quarter of 2016.

Income from continuing operations decreased approximately $3.7 billion and $73.1 million for the nine months and quarter ended September 30, 2017, respectively, compared to the prior periods.  The decrease in continuing operations is discussed below.

The guidance/projections provided below are based on current projections and are forward-looking.

For the nine months ended September 30, 2017, consolidated rental income increased 1.3%, consolidated operating expenses (comprised of property and maintenance and real estate taxes and insurance) increased 2.1% and consolidated NOI increased 0.9% when compared to the nine months ended September 30, 2016.  The increase in NOI is primarily a result of the Company’s improved NOI from same store and lease-up properties.  For the quarter ended September 30, 2017, consolidated rental income increased 3.0%, consolidated operating expenses (comprised of property and maintenance and real estate taxes and insurance) increased 1.8% and consolidated NOI increased 3.5% when compared to the quarter ended September 30, 2016. The increase in NOI is primarily a result of improved NOI from same store and lease-up properties.

For the nine months ended September 30, 2017, fee and asset management revenues decreased approximately $2.8 million or 84.1% primarily as a result of lower revenue earned on management of the Company's military housing ventures at Joint Base Lewis McChord due to the sale of the Company's entire interest in the management contracts and related rights associated with these ventures in the second quarter of 2016.

Property management expenses include off-site expenses associated with the self-management of the Company’s properties as well as management fees paid to any third party management companies.  These expenses increased approximately $0.7 million or 1.1% and approximately $1.3 million or 6.9% for the nine months and quarters ended September 30, 2017, respectively, compared to the prior year periods.  These increases are primarily attributable to increases in education/conference costs and legal fees.  The Company anticipates that property management expenses will approximate $85.0 million for the year ending December 31, 2017.

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General and administrative expenses, which include corporate operating expenses, decreased approximately $7.0 million or 14.9% for the nine months ended September 30, 2017 compared to the prior year period, primarily due to a decrease in payroll-related costs in 2017 compared to 2016. General and administrative expenses increased approximately $0.2 million or 1.4% for the quarter ended September 30, 2017 compared to the prior year period, primarily due to an increase in payroll-related costs in 2017.  The Company anticipates that general and administrative expenses will approximate $52.0 million for the year ending December 31, 2017, excluding charges of approximately $0.4 million related to the overlap of accounting costs for the Company's current and former executive compensation programs.

Depreciation expense, which includes depreciation on non-real estate assets, increased approximately $14.7 million or 2.8% and $4.9 million or 2.7% for the nine months and quarters ended September 30, 2017, respectively, compared to the prior year periods, primarily as a result of additional depreciation expense on properties acquired in 2016 and 2017 and development properties placed in service, partially offset by lower depreciation from properties sold in 2016 and 2017.

Interest and other income decreased approximately $59.4 million or 91.2% and $1.6 million or 28.4% for the nine months and quarters ended September 30, 2017, respectively, compared to the prior year periods.  The year to date decrease is primarily attributable to the approximate $52.4 million gain from the sale of the Company's entire interest in the management contracts and related rights associated with the military housing ventures at Joint Base Lewis McChord during the nine months ended September 30, 2016 which did not reoccur in 2017.  The year to date and quarterly decreases are also a result of the sale of the Company’s 421-a real estate tax certificates during the third quarter of 2016 which did not reoccur in 2017.  The Company anticipates that interest and other income will approximate $1.2 million for the year ending December 31, 2017, excluding certain non-comparable insurance/litigation settlement proceeds.

Other expenses decreased approximately $11.3 million or 78.2% and $9.4 million or 90.1% for the nine months and quarters ended September 30, 2017, respectively, compared to the prior year periods, primarily due to a decrease in litigation settlements in 2017 as compared to 2016, as well as a decrease in annual transaction costs of approximately $1.5 million.  In addition, the Company anticipates that substantially all of its transactions will now be accounted for as asset acquisitions, which means that transaction costs will largely be capitalized, as a result of its adoption of the new definition of a business standard effective January 1, 2017.  See Note 2 in the Notes to Consolidated Financial Statements for further discussion.

Interest expense, including amortization of deferred financing costs, decreased approximately $101.3 million or 25.6% for the nine months ended September 30, 2017 compared to the prior year period, primarily as a result of $108.5 million in lower debt extinguishment costs in 2017 as compared to 2016.  The effective interest cost on all indebtedness for the nine months ended September 30, 2017 was 4.47% as compared to 4.69% for the prior year period.  Interest expense, including amortization of deferred financing costs, increased approximately $4.6 million or 5.2% for the quarter ended September 30, 2017 compared to the prior period.  The increase is primarily due to a result of lower capitalized interest for the current period compared to the prior period.  The effective interest cost on all indebtedness for the quarter ended September 30, 2017 was 4.35% as compared to 4.67% for the prior year period.  The Company capitalized interest of approximately $23.2 million and $41.7 million during the nine months ended September 30, 2017 and 2016, respectively, and $6.6 million and $13.3 million during the quarters ended September 30, 2017 and 2016, respectively.  The Company anticipates that interest expense from continuing operations, excluding debt extinguishment costs/prepayment penalties, will approximate $370.5 million to $374.7 million and capitalized interest will approximate $25.0 million to $27.0 million for the year ending December 31, 2017.

Income and other tax expense decreased approximately $0.5 million or 40.3% and $0.2 million or 46.5% for the nine months and quarters ended September 30, 2017, respectively, compared to the prior year periods, primarily due to decreases in various state and local taxes related to the Company's elevated disposition activity in 2016 vs. 2017.  The Company anticipates that income and other tax expense will approximate $1.0 million for the year ending December 31, 2017.

Income from investments in unconsolidated entities decreased approximately $8.0 million and $8.1 million for the nine months and quarters ended September 30, 2017, respectively, compared to the prior year periods, primarily due to the gain on the sale of one unconsolidated apartment property in the prior year that did not occur in 2017.

Net gain on sales of real estate properties decreased approximately $3.7 billion or 96.3% as a result of the sale of 91 consolidated apartment properties (including the Starwood Portfolio) during the nine months ended September 30, 2016 as compared to only four consolidated apartment property sales during the nine months ended September 30, 2017, all of which did not meet the criteria for reporting discontinued operations.  Net gain on sales of real estate properties decreased approximately $72.7 million and 80.8% during the quarter ended September 30, 2017 compared to the prior period as a result of the sale of one consolidated apartment property compared to the sale of eight consolidated properties in the prior year.  See Note 11 in the Notes to Consolidated Financial Statements for further discussion.

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Net gain on sales of land parcels increased approximately $3.4 million or 21.6% due to the gain on sale of one land parcel with a low basis during the nine months ended September 30, 2017 as compared to the gain on sales of four land parcels during the nine months ended September 30, 2016.  Net gain on sales of land parcels decreased approximately $4.0 million during the quarter ended September 30, 2017 as compared to the prior period as a result of the gain on sale of one land parcel in the prior year that did not occur in 2017.

Liquidity and Capital Resources

Short-Term Liquidity and Cash Proceeds

The Company generally expects to meet its short-term liquidity requirements, including capital expenditures related to maintaining its existing properties and scheduled unsecured note and mortgage note repayments, through its working capital, net cash provided by operating activities and borrowings under the Company’s revolving credit facility and commercial paper program.  Under normal operating conditions, the Company considers its cash provided by operating activities to be adequate to meet operating requirements and payments of distributions.

As of January 1, 2017, the Company had approximately $77.2 million of cash and cash equivalents and the amount available on its revolving credit facility was $1.96 billion (net of $20.6 million which was restricted/dedicated to support letters of credit and net of $20.0 million in principal outstanding on the commercial paper program).  After taking into effect the various transactions discussed in the following paragraphs and the net cash provided by operating activities, the Company's cash and cash equivalents balance at September 30, 2017 was approximately $46.6 million and the amount available on its revolving credit facility was $1.76 billion (net of $11.1 million which was restricted/dedicated to support letters of credit and net of $230.0 million in principal outstanding on the commercial paper program).

During the nine months ended September 30, 2017, the Company generated proceeds from various transactions, which included the following:

• Disposed of four consolidated rental properties and one land parcel, receiving net proceeds of approximately $350.0 million;

• Issued $400.0 million of ten-year 3.25% fixed rate public notes, receiving net proceeds of approximately $399.3 million before underwriting fees, hedge termination costs and other expenses;

• Issued $300.0 million of thirty-year 4.00% fixed rate public notes, receiving net proceeds of approximately $293.2 million before underwriting fees and other expenses; and

• Issued approximately 0.4 million Common Shares related to share option exercises and ESPP purchases and received net proceeds of $15.9 million, which were contributed to the capital of the Operating Partnership in exchange for additional OP Units (on a one-for-one Common Share per OP Unit basis).

During the nine months ended September 30, 2017, the above proceeds along with net cash flow from operations and borrowings from the Company's revolving line of credit and commercial paper program were primarily utilized to:

• Acquire four consolidated rental properties for approximately $466.4 million in cash;

• Invest $227.2 million primarily in development projects;

• Repay $502.2 million of mortgage loans and incur prepayment penalties of approximately $12.3 million; and

• Repay $394.1 million of 5.750% unsecured notes at maturity.

Credit Facility and Commercial Paper Program

On November 3, 2016, the Company replaced its existing $2.5 billion facility with a $2.0 billion unsecured revolving credit facility maturing January 10, 2022.  The Company has the ability to increase available borrowings by an additional $750.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments.  The interest rate on advances under the facility will generally be LIBOR plus a spread (currently 0.825%), or based on bids received from the lending group, and the Company pays an annual facility fee (currently 12.5 basis points).  Both the spread and the facility fee are dependent on the credit rating of the Company's long-term debt.

On February 2, 2015, the Company entered into an unsecured commercial paper note program in the United States.  The

50

Company may borrow up to a maximum of $500.0 million under this program subject to market conditions.  The notes will be sold under customary terms in the United States commercial paper note market and will rank pari passu with all of the Company's other unsecured senior indebtedness.  As of October 27, 2017, there was a balance of $440.0 million outstanding on the commercial paper program.

As of October 27, 2017, no amounts were outstanding and the amount available on the revolving credit facility was $1.55 billion (net of $6.6 million which was restricted/dedicated to support letters of credit and net of $440.0 million in principal outstanding on the commercial paper program).  This facility may, among other potential uses, be used to fund property acquisitions, costs for certain properties under development and short-term liquidity requirements.

Dividend Policy

The Company’s and the Operating Partnership’s dividend policy has not changed from the information included in the Company’s and the Operating Partnership’s Annual Report on Form 10-K for the year ended December 31, 2016.  Total distributions paid in October 2017 amounted to $192.6 million (excluding distributions on Partially Owned Properties), which included certain distributions declared during the third quarter ended September 30, 2017.

Long-Term Financing and Capital Needs

The Company expects to meet its long-term liquidity requirements, such as lump sum unsecured note and mortgage debt maturities, property acquisitions, financing of construction and development activities through the issuance of secured and unsecured debt and equity securities, including additional OP Units, proceeds received from the disposition of certain properties and joint ventures and cash generated from operations after all distributions.  In addition, the Company has significant unencumbered properties available to secure additional mortgage borrowings in the event that the public capital markets are unavailable or the cost of alternative sources of capital is too high.  The fair value of and cash flow from these unencumbered properties are in excess of the requirements the Company must maintain in order to comply with covenants under its unsecured notes, line of credit and commercial paper program.  Of the $25.9 billion in investment in real estate on the Company’s balance sheet at September 30, 2017, $20.0 billion or 77.1% was unencumbered.  However, there can be no assurances that these sources of capital will be available to the Company in the future on acceptable terms or otherwise.

EQR issues public equity from time to time and guarantees certain debt of the Operating Partnership.  EQR does not have any indebtedness as all debt is incurred by the Operating Partnership.

The Company’s total debt summary and debt maturity schedules as of September 30, 2017 are as follows:

Debt Summary as of September 30, 2017

($ in thousands)

									Weighted
						Weighted			Average
						Average			Maturities
	Amounts (1)		% of Total			Rates (1)			(years)
Secured	$	3,619,180		40.2	%		4.33	%		5.8
Unsecured		5,373,092		59.8	%		4.22	%		10.8
Total	$	8,992,272		100.0	%		4.27	%		8.8
Fixed Rate Debt:
Secured – Conventional	$	2,983,680		33.2	%		4.91	%		4.3
Unsecured – Public		4,693,929		52.2	%		4.68	%		12.2
Fixed Rate Debt		7,677,609		85.4	%		4.77	%		9.1
Floating Rate Debt:
Secured – Conventional		7,046		0.1	%		0.98	%		16.1
Secured – Tax Exempt		628,454		6.9	%		1.49	%		12.4
Unsecured – Public (2)		449,319		5.0	%		1.77	%		1.7
Unsecured – Revolving Credit Facility		—		—			2.00	%		4.2
Unsecured – Commercial Paper Program		229,844		2.6	%		1.37	%		—
Floating Rate Debt		1,314,663		14.6	%		1.57	%		6.9
Total	$	8,992,272		100.0	%		4.27	%		8.8

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(1) Net of the effect of any derivative instruments.  Weighted average rates are for the nine months ended September 30, 2017.

(2) Fair value interest rate swaps convert the $450.0 million 2.375% notes due July 1, 2019 to a floating interest rate of 90-Day LIBOR plus 0.61%.

Debt Maturity Schedule as of September 30, 2017

($ in thousands)

Year	Fixed Rate (1)				Floating Rate (1)				Total			% of Total			Weighted Average Rates on Fixed Rate Debt (1)			Weighted Average Rates on Total Debt (1)
2017	$	105,731			$	230,100		(2)	$	335,831			3.7	%		7.08	%		3.20	%
2018		49,734				97,235				146,969			1.6	%		5.55	%		2.99	%
2019		506,731		(3)		470,644				977,375			10.7	%		5.17	%		3.58	%
2020		1,678,592		(4)		400				1,678,992			18.5	%		5.49	%		5.49	%
2021		927,506				300				927,806			10.2	%		4.64	%		4.64	%
2022		265,341				400				265,741			2.9	%		3.26	%		3.26	%
2023		1,326,800				4,400				1,331,200			14.6	%		3.74	%		3.73	%
2024		1,272				10,500				11,772			0.1	%		4.79	%		1.39	%
2025		451,334				12,800				464,134			5.1	%		3.38	%		3.31	%
2026		593,424				14,000				607,424			6.7	%		3.59	%		3.53	%
2027+		1,826,437				535,265				2,361,702			25.9	%		4.15	%		3.43	%
Subtotal		7,732,902				1,376,044				9,108,946			100.0	%		4.39	%		3.97	%
Deferred Financing Costs and    Unamortized (Discount)		(55,293	)			(61,381	)			(116,674	)	N/A			N/A			N/A
Total	$	7,677,609			$	1,314,663			$	8,992,272			100.0	%		4.39	%		3.97	%

(1) Net of the effect of any derivative instruments.  Weighted average rates are as of September 30, 2017.

(2) Includes $230.0 million in principal outstanding on the Company’s commercial paper program.

(3) Includes a $500.0 million 5.19% mortgage loan with a maturity date of October 1, 2019 that can be prepaid at par beginning October 1, 2018.

(4) Includes a $550.0 million 6.08% mortgage loan with a maturity date of March 1, 2020 that can be prepaid at par beginning March 1, 2019.  Also includes a $500.0 million 5.78% mortgage loan with a maturity date of July 1, 2020 that can be prepaid at par beginning July 1, 2019.

See Note 8 in the Notes to Consolidated Financial Statements for additional discussion of debt at September 30, 2017.

ERPOP's long-term senior debt ratings and short-term commercial paper ratings as well as EQR's long-term preferred equity ratings, which all have a stable outlook, as of October 27, 2017 are as follows:

	Standard & Poor's	Moody's	Fitch
ERPOP's long-term senior debt rating	A-	A3 (1)	A-
ERPOP's short-term commercial paper rating	A-2	P-2	F-2
EQR's long-term preferred equity rating	BBB	Baa1 (1)	BBB

(1) The long-term credit ratings listed above reflect the one-level upgrade by Moody’s effective July 17, 2017.

See Note 14 in the Notes to Consolidated Financial Statements for discussion of the events which occurred subsequent to September 30, 2017.

Capitalization of Fixed Assets and Improvements to Real Estate

The Company’s and the Operating Partnership’s capital expenditures policy has not changed from the information included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

For the nine months ended September 30, 2017, our actual capital expenditures to real estate included the following (amounts in thousands except for apartment unit and per apartment unit amounts):

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Capital Expenditures to Real Estate

For theNine Months Ended September 30, 2017

	Same Stores Properties (5)		Non-Same Store Properties/Other (6)		Total		Same Store Avg. Per Apartment Unit
Total Apartment Units (1)		70,285		7,072		77,357
Building Improvements (2)	$	75,369	$	2,379	$	77,748	$	1,072
Rehab Expenditures (3)		35,698		889		36,587		508
Replacements (4)		28,571		352		28,923		407
Total Capital Expenditures	$	139,638	$	3,620	$	143,258	$	1,987

(1) Total Apartment Units – Excludes 945 unconsolidated apartment units for which capital expenditures to real estate are self-funded and do not consolidate into the Company's results.

(2) Building Improvements – Includes roof replacement, paving, building mechanical equipment systems, exterior siding and painting, major landscaping, furniture, fixtures and equipment for amenities and common areas, vehicles and office and maintenance equipment.  

(3) Rehab Expenditures – Apartment unit renovation costs (primarily kitchens and baths) designed to reposition these units for higher rental levels in their respective markets.  Amounts for same store properties approximated $13,000 per apartment unit rehabbed.  

(4) Replacements – Includes appliances, mechanical equipment, fixtures and flooring (including hardwood and carpeting).

(5) Same Store Properties – Primarily includes all properties acquired or completed that are stabilized prior to January 1, 2016, less properties subsequently sold.

(6) Non-Same Store Properties/Other – Primarily includes all properties acquired during 2016 and 2017, plus any properties in lease-up and not stabilized as of January 1, 2016.  Also includes capital expenditures for properties sold.

The Company estimates that during 2017 it will spend approximately $2,500 per same store apartment unit or $176.0 million of total capital expenditures to real estate.  During 2017, the Company expects to spend approximately $43.0 million for apartment unit rehab expenditures on same store properties at an average cost of approximately $13,000 per apartment unit rehabbed.  The anticipated total capital expenditures to real estate amounts represent an increase as a percentage of rental revenues, in the cost per unit and in the absolute dollar amounts over 2016. We will continue to create value from our properties by doing those rehabs that meet our investment criteria.  The above assumptions are based on current expectations and are forward-looking.

During the nine months ended September 30, 2017, the Company’s total non-real estate capital additions, such as computer software, computer equipment, and furniture and fixtures and leasehold improvements to the Company’s property management offices and its corporate offices, were approximately $0.8 million.  The Company expects to fund approximately $0.6 million in total non-real estate capital additions for the remainder of 2017.  These anticipated fundings represent a decrease over 2016, which is primarily driven by the substantial completion of the implementation of new systems during 2016.  The above assumption is based on current expectations and is forward-looking.

Capital expenditures to real estate and non-real estate capital additions are generally funded from net cash provided by operating activities and from investment cash flow.

Derivative Instruments

In the normal course of business, the Company is exposed to the effect of interest rate changes.  The Company seeks to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments.  The Company may also use derivatives to manage commodity prices in the daily operations of the business.

The Company has a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.  When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from these instruments nor does it anticipate any material adverse effect on its net income or financial position in the future from the use of derivatives it currently has in place.

See Note 9 in the Notes to Consolidated Financial Statements for additional discussion of derivative instruments at September 30, 2017.

53

Definitions

The definition of certain terms described above or below are as follows:

• Acquisition Cap Rate – NOI that the Company anticipates receiving in the next 12 months (or the year two or three stabilized NOI for properties that are in lease-up at acquisition) less an estimate of property management costs/management fees allocated to the project (generally ranging from 2.0% to 4.0% of revenues depending on the size and income streams of the asset) and less an estimate for in-the-unit replacement capital expenditures (generally ranging from $100-$450 per apartment unit depending on the age and condition of the asset) divided by the gross purchase price of the asset.  The weighted average Acquisition Cap Rate for acquired properties is weighted based on the projected NOI streams and the relative purchase price for each respective property.

• Disposition Yield – NOI that the Company anticipates giving up in the next 12 months less an estimate of property management costs/management fees allocated to the project (generally ranging from 2.0% to 4.0% of revenues depending on the size and income streams of the asset) and less an estimate for in-the-unit replacement capital expenditures (generally ranging from $100-$450 per apartment unit depending on the age and condition of the asset) divided by the gross sale price of the asset.  The weighted average Disposition Yield for sold properties is weighted based on the projected NOI streams and the relative sales price for each respective property.

• Unlevered Internal Rate of Return (“IRR”) – The Unlevered IRR on sold properties is the compound annual rate of return calculated by the Company based on the timing and amount of: (i) the gross purchase price of the property plus any direct acquisition costs incurred by the Company; (ii) total revenues earned during the Company’s ownership period; (iii) total direct property operating expenses (including real estate taxes and insurance) incurred during the Company’s ownership period; (iv) capital expenditures incurred during the Company’s ownership period; and (v) the gross sales price of the property net of selling costs.  Each of the items (i) through (v) is calculated in accordance with generally accepted accounting principles (“GAAP”).  

Off-Balance Sheet Arrangements and Contractual Obligations

The Company has various unconsolidated interests in certain joint ventures.  The Company does not believe that these unconsolidated investments have a materially different impact on its liquidity, cash flows, capital resources, credit or market risk than its consolidated operating and/or other activities.  See Notes 2 and 6 in the Notes to Consolidated Financial Statements for additional discussion regarding the Company’s investments in partially owned entities.  See also Note 12 in the Notes to Consolidated Financial Statements for discussion regarding the Company’s development projects.

The Company’s contractual obligations for the next five years and thereafter have not changed materially from the amounts and disclosures included in the Company’s and the Operating Partnership’s Annual Report on Form 10-K for the year ended December 31, 2016.  See the updated debt maturity schedule included in Liquidity and Capital Resources for further discussion.

Critical Accounting Policies and Estimates

The Company’s and the Operating Partnership’s critical accounting policies and estimates have not changed materially from the information included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

Funds From Operations and Normalized Funds From Operations

The following is the Company’s and the Operating Partnership’s reconciliation of net income to FFO available to Common Shares and Units / Units and Normalized FFO available to Common Shares and Units / Units for the nine months and quarters ended September 30, 2017 and 2016.

54

Funds From Operations and Normalized Funds From Operations

(Amounts in thousands)

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Net income	$	498,297		$	4,177,723		$	144,196		$	217,492
Net (income) attributable to Noncontrolling Interests – Partially Owned     Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Net income available to Common Shares and Units / Units		493,625			4,173,037			142,623			215,896
Adjustments:
Depreciation		542,964			528,242			184,100			179,230
Depreciation – Non-real estate additions		(3,808	)		(3,932	)		(1,228	)		(1,297	)
Depreciation – Partially Owned Properties		(2,500	)		(2,896	)		(834	)		(953	)
Depreciation – Unconsolidated Properties		3,430			3,606			1,145			1,139
Net (gain) on sales of unconsolidated entities - operating assets		(68	)		(8,841	)		—			(8,841	)
Net (gain) on sales of real estate properties		(141,761	)		(3,870,871	)		(17,328	)		(90,036	)
Discontinued operations:
Net (gain) on sales of discontinued operations		—			(43	)		—			(28	)
FFO available to Common Shares and Units / Units (1) (3) (4)		891,882			818,302			308,478			295,110
Adjustments:
Asset impairment and valuation allowances		—			—			—			—
Write-off of pursuit costs		2,329			3,379			783			816
Debt extinguishment (gains) losses, including prepayment penalties,    preferred share/preference unit redemptions and non-cash convertible    debt discounts		11,789			120,276			(613	)		112
(Gains) losses on sales of non-operating assets, net of income    and other tax expense (benefit)		(19,355	)		(73,600	)		(405	)		(7,007	)
Other miscellaneous items		(4,195	)		8,673			(3,405	)		8,159
Normalized FFO available to Common Shares and Units / Units (2) (3) (4)	$	882,450		$	877,030		$	304,838		$	297,190
FFO (1) (3)	$	894,200		$	820,620		$	309,250		$	295,883
Preferred/preference distributions		(2,318	)		(2,318	)		(772	)		(773	)
FFO available to Common Shares and Units / Units (1) (3) (4)	$	891,882		$	818,302		$	308,478		$	295,110
Normalized FFO (2) (3)	$	884,768		$	879,348		$	305,610		$	297,963
Preferred/preference distributions		(2,318	)		(2,318	)		(772	)		(773	)
Normalized FFO available to Common Shares and Units / Units (2) (3) (4)	$	882,450		$	877,030		$	304,838		$	297,190

(1) The National Association of Real Estate Investment Trusts (“NAREIT”) defines funds from operations (“FFO”) (April 2002 White Paper) as net income (computed in accordance with accounting principles generally accepted in the United States (“GAAP”)), excluding gains (or losses) from sales and impairment write-downs of depreciable operating properties, plus depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures.  Adjustments for unconsolidated partnerships and joint ventures will be calculated to reflect funds from operations on the same basis.  The April 2002 White Paper states that gain or loss on sales of property is excluded from FFO for previously depreciated operating properties only.  

(2) Normalized funds from operations (“Normalized FFO”) begins with FFO and excludes:

• the impact of any expenses relating to non-operating asset impairment and valuation allowances;

• pursuit cost write-offs;

• gains and losses from early debt extinguishment, including prepayment penalties, preferred share/preference unit redemptions and the cost related to the implied option value of non-cash convertible debt discounts;

• gains and losses on the sales of non-operating assets, including gains and losses from land parcel sales, net of the effect of income tax benefits or expenses; and

• other miscellaneous items.

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(3) The Company believes that FFO and FFO available to Common Shares and Units / Units are helpful to investors as supplemental measures of the operating performance of a real estate company, because they are recognized measures of performance by the real estate industry and by excluding gains or losses related to dispositions of depreciable property and excluding real estate depreciation (which can vary among owners of identical assets in similar condition based on historical cost accounting and useful life estimates), FFO and FFO available to Common Shares and Units / Units can help compare the operating performance of a company’s real estate between periods or as compared to different companies.  The Company also believes that Normalized FFO and Normalized FFO available to Common Shares and Units / Units are helpful to investors as supplemental measures of the operating performance of a real estate company because they allow investors to compare the Company's operating performance to its performance in prior reporting periods and to the operating performance of other real estate companies without the effect of items that by their nature are not comparable from period to period and tend to obscure the Company's actual operating results.  FFO, FFO available to Common Shares and Units / Units, Normalized FFO and Normalized FFO available to Common Shares and Units / Units do not represent net income, net income available to Common Shares / Units or net cash flows from operating activities in accordance with GAAP.  Therefore, FFO, FFO available to Common Shares and Units / Units, Normalized FFO and Normalized FFO available to Common Shares and Units / Units should not be exclusively considered as alternatives to net income, net income available to Common Shares / Units or net cash flows from operating activities as determined by GAAP or as a measure of liquidity.  The Company's calculation of FFO, FFO available to Common Shares and Units / Units, Normalized FFO and Normalized FFO available to Common Shares and Units / Units may differ from other real estate companies due to, among other items, variations in cost capitalization policies for capital expenditures and, accordingly, may not be comparable to such other real estate companies.  

(4) FFO available to Common Shares and Units / Units and Normalized FFO available to Common Shares and Units / Units are calculated on a basis consistent with net income available to Common Shares / Units and reflects adjustments to net income for preferred distributions and premiums on redemption of preferred shares/preference units in accordance with GAAP.  The equity positions of various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units are collectively referred to as the "Noncontrolling Interests –Operating Partnership".  Subject to certain restrictions, the Noncontrolling Interests –Operating Partnership may exchange their OP Units for Common Shares on a one-for-one basis.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

The Company’s and the Operating Partnership’s market risk has not changed materially from the amounts and information reported in Part II, Item 7A. Quantitative and Qualitative Disclosures About Market Risk, to the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.  See Note 9 in the Notes to Consolidated Financial Statements for additional discussion of derivative and other fair value instruments.

Item 4.  Controls and Procedures

Equity Residential

(a) Evaluation of Disclosure Controls and Procedures:

Effective as of September 30, 2017, the Company carried out an evaluation, under the supervision and with the participation of the Company’s management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the Company’s disclosure controls and procedures pursuant to Exchange Act Rules 13a-15 and 15d-15.  Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the disclosure controls and procedures are effective to ensure that information required to be disclosed by the Company in its Exchange Act filings is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

(b) Changes in Internal Control over Financial Reporting:

There were no changes to the internal control over financial reporting of the Company identified in connection with the Company’s evaluation referred to in Item 4(a) above that occurred during the third quarter of 2017 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

ERP Operating Limited Partnership

(a) Evaluation of Disclosure Controls and Procedures:

Effective as of September 30, 2017, the Operating Partnership carried out an evaluation, under the supervision and with the participation of the Operating Partnership’s management, including the Chief Executive Officer and Chief Financial Officer of EQR, of the effectiveness of the Operating Partnership’s disclosure controls and procedures pursuant to Exchange Act Rules 13a-15 and 15d-15.  Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the disclosure controls and procedures are effective to ensure that information required to be disclosed by the Operating Partnership in its Exchange Act filings is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

(b) Changes in Internal Control over Financial Reporting:

There were no changes to the internal control over financial reporting of the Operating Partnership identified in connection with

56

the Operating Partnership’s evaluation referred to in Item 4(a) above that occurred during the third quarter of 2017 that have materially affected, or are reasonably likely to materially affect, the Operating Partnership’s internal control over financial reporting.

PART II.  OTHER INFORMATION

Item 1.  Legal Proceedings

As of September 30, 2017, the Company does not believe there is any litigation pending or threatened against it that, individually or in the aggregate, may reasonably be expected to have a material adverse effect on the Company.

Item 1A.  Risk Factors

Therehavebeennomaterialchangestotheriskfactors thatwerediscussedinPartI,Item1AoftheCompany’sandthe OperatingPartnership'sAnnualReportonForm10-Kfortheyearended December 31, 2016.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds

(a) Unregistered Common Shares Issued in the Quarter Ended September 30, 2017 - Equity Residential

During the quarter ended September 30, 2017, EQR issued 6,146 Common Shares in exchange for 6,146 OP Units held by various limited partners of ERPOP.  OP Units are generally exchangeable into Common Shares on a one-for-one basis or, at the optionofERPOP,thecashequivalentthereof,atanytimeoneyearafterthedateofissuance.  Theseshareswereeitherregistered undertheSecuritiesActof1933,asamended(the“SecuritiesAct”),orissuedinrelianceonanexemptionfromregistrationunder Section 4(a)(2) of the Securities Act and the rules and regulations promulgated thereunder, as these were transactions by an issuer not involving a public offering.  In light of the manner of the sale and information obtained by EQR from the limited partners in connection with these transactions, EQR believes it may rely on theseexemptions.

Item 3.  Defaults Upon Senior Securities

None.

Item 4.  Mine Safety Disclosures

Not applicable.

Item 5.  Other Information

None.

Item 6.  Exhibits – See the Exhibit Index.

57

EXHIBIT INDEX

Theexhibitslistedbelowarefiledaspartofthisreport.  Referencestoexhibitsorotherfilingsunderthecaption“Location”indicate thattheexhibitorotherfilinghasbeenfiled,thattheindexedexhibitandtheexhibitreferredtoarethesameandthattheexhibit referredtoisincorporatedbyreference.  TheCommissionfilenumbersforourExchangeActfilingsreferencedbeloware1-12252 (Equity Residential) and 0-24920 (ERP Operating LimitedPartnership).

Exhibit	Description	Location
4.1	Form of 3.250% Note due August 1, 2027.	Included as Exhibit 4.1 to Equity Residential’s and ERP Operating Limited Partnership's Form 8-K dated July 31, 2017, filed on August 2, 2017.
4.2	Form of 4.000% Note due August 1, 2047.	Included as Exhibit 4.2 to Equity Residential’s and ERP Operating Limited Partnership's Form 8-K dated July 31, 2017, filed on August 2, 2017.
10.1	Seventh Amendment to 2011 Share Incentive Plan.	Attached herein.
12	Computation of Ratio of Earnings to CombinedFixedCharges.	Attachedherein.
31.1	Equity Residential – Certification of David J. Neithercut, ChiefExecutiveOfficer.	Attachedherein.
31.2	Equity Residential – Certification of Mark J. Parrell, ChiefFinancialOfficer.	Attachedherein.
31.3	ERP Operating Limited Partnership – Certification of David J. Neithercut, Chief Executive Officer of Registrant’s GeneralPartner.	Attachedherein.
31.4	ERP Operating Limited Partnership – Certification of Mark J. Parrell, Chief Financial Officer of Registrant’s GeneralPartner.	Attachedherein.
32.1	Equity Residential – Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906oftheSarbanes-OxleyActof2002,ofDavidJ.Neithercut,ChiefExecutiveOfficeroftheCompany.	Attachedherein.
32.2	Equity Residential – Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906oftheSarbanes-OxleyActof2002,ofMarkJ.Parrell,ChiefFinancialOfficeroftheCompany.	Attachedherein.
32.3	ERP Operating Limited Partnership – Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, of David J. Neithercut, Chief Executive OfficerofRegistrant’sGeneralPartner.	Attachedherein.
32.4	ERP Operating Limited Partnership – Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, of Mark J. Parrell, Chief Financial Officer of Registrant’s GeneralPartner.	Attachedherein.
101	XBRL (Extensible Business Reporting Language). The following materials from Equity Residential’s and ERP Operating Limited Partnership’s Quarterly Report on Form 10-Q for the period ended September 30, 2017,formattedinXBRL:(i)consolidatedbalancesheets,(ii)consolidatedstatementsofoperations and comprehensive income, (iii) consolidated statements of cash flows, (iv) consolidated statement of changesinequity(EquityResidential),(v)consolidatedstatementofchangesincapital(ERPOperating Limited Partnership) and (vi) notes to consolidated financialstatements.	Attachedherein.

58

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		EQUITY RESIDENTIAL
Date:	November 1, 2017	By:	/s/ Mark J. Parrell
			Mark J. Parrell
			Executive Vice President and Chief Financial Officer
			(Principal Financial Officer)
Date:	November 1, 2017	By:	/s/ Ian S. Kaufman
			Ian S. Kaufman
			Senior Vice President and Chief Accounting Officer
			(Principal Accounting Officer)

		ERP OPERATING LIMITED PARTNERSHIP BY: EQUITY RESIDENTIAL ITS GENERAL PARTNER
Date:	November 1, 2017	By:	/s/ Mark J. Parrell
			Mark J. Parrell
			Executive Vice President and Chief Financial Officer
			(Principal Financial Officer)
Date:	November 1, 2017	By:	/s/ Ian S. Kaufman
			Ian S. Kaufman
			Senior Vice President and Chief Accounting Officer
			(Principal Accounting Officer)

EX-10.1

Exhibit 10.1

SEVENTH AMENDMENT TO

2011 SHARE INCENTIVE PLAN

THIS SEVENTH AMENDMENT (the “Seventh Amendment”) to the 2011 SHARE INCENTIVE PLAN is executed as of July 27, 2017.  

RECITALS

WHEREAS, the Board of Trustees of Equity Residential (the “Company”) adopted the 2011 Share Incentive Plan (the “Initial 2011 Plan”) on March 24, 2011, which was approved by the shareholders of the Company at the 2011 Annual Meeting of Shareholders.  

WHEREAS, the Company amended the Initial 2011 Plan pursuant to a First Amendment dated July 10, 2012 (the “First Amendment”), a Second Amendment dated November 4, 2013 (the “Second Amendment”), a Third Amendment dated April 30, 2014 (the “Third Amendment”), a Fourth Amendment dated October 20, 2014 (the “Fourth Amendment”), a Fifth Amendment dated June 16, 2016 (the “Fifth Amendment”) and a Sixth Amendment dated January 24, 2017 (the “Sixth Amendment”).  The Initial 2011 Plan, as modified by the First Amendment, Second Amendment, Third Amendment, Fourth Amendment, Fifth Amendment and Sixth Amendment, is hereinafter referred to as the “Plan”.  Capitalized terms used herein and not otherwise defined shall have the meanings ascribed thereto in the Plan.

WHEREAS, the Company desires to further amend the Plan to provide that the vesting in full of outstanding equity awards upon the retirement of an employee who is age 62 or older (and was hired prior to January 1, 2009) is conditioned upon their execution of a customary release at the time of the termination of their employment which releases the Company from customary claims.

NOW THEREFORE, the Plan is amended as follows:

1.Share Awards.  Paragraph 5(a)(iii)(B) of the Plan is deleted in its entirety and the following is substituted therefor:

(B)   with respect to a Grantee who is an employee in connection with his or her Disability (as defined in Section 5(d)); or if such Grantee’s Service commenced prior to January 1, 2009, in connection with such Grantee’s termination of Service (other than if the termination occurs for Good Cause) at or after age 62, provided the Grantee signs a release in a form that is reasonably satisfactory to the Company releasing the Company from customary claims (“Age 62 Release”); or

2.Share Options.  Paragraph 6(e)(ii) of the Plan is deleted in its entirety and the following is substituted therefor:

(ii)with respect to a Grantee who is an employee in connection with his or her Disability (as defined in Section 5(d)); or if such Grantee’s Service commenced on or prior to January 1, 2009, in connection with such Grantee’s termination of Service (other than if the

termination occurs for Good Cause) at or after age 62, in which case it shall be exercisable until its Expiration Date provided the Grantee signs the Age 62 Release; or

3.Plan in Full Force and Effect.  After giving effect to this Seventh Amendment, the Plan remains in full force and effect.

IN WITNESS WHEREOF, this Seventh Amendment has been executed as of the date first written above.

EQUITY RESIDENTIAL

By:	/s/ Bruce C. Strohm
	Bruce C. Strohm
	Executive Vice President and General Counsel

EX-12

Exhibit 12

EQUITY RESIDENTIAL

ERP OPERATING LIMITED PARTNERSHIP

Computation of Ratio of Earnings to Combined Fixed Charges

($ in thousands)

	Nine Months Ended September 30,						Year Ended December 31,
	2017			2016			2016			2015			2014			2013			2012
Income (loss) from continuing operations	$	498,297		$	4,177,599		$	4,479,586		$	907,621		$	657,101		$	(168,174	)	$	160,298
Interest expense incurred, net		288,579			386,316			482,246			444,487			457,460			587,141			455,477
Amortization of deferred financing costs		6,447			10,000			12,633			10,801			11,088			22,197			21,295
Earnings before combined fixed charges and preferred    distributions		793,323			4,573,915			4,974,465			1,362,909			1,125,649			441,164			637,070
Preferred Share/Preference Unit distributions		(2,318	)		(2,318	)		(3,091	)		(3,357	)		(4,145	)		(4,145	)		(10,355	)
Premium on redemption of Preferred Shares/Preference Units		—			—			—			(3,486	)		—			—			(5,152	)
Earnings before combined fixed charges	$	791,005		$	4,571,597		$	4,971,374		$	1,356,066		$	1,121,504		$	437,019		$	621,563
Interest expense incurred, net	$	288,579		$	386,316		$	482,246		$	444,487		$	457,460		$	587,141		$	455,477
Amortization of deferred financing costs		6,447			10,000			12,633			10,801			11,088			22,197			21,295
Interest capitalized for real estate and unconsolidated entities    under development		23,164			41,658			51,451			59,885			52,782			47,321			22,509
Amortization of deferred financing costs for real estate under    development		—			—			—			—			—			152			—
Total combined fixed charges		318,190			437,974			546,330			515,173			521,330			656,811			499,281
Preferred Share/Preference Unit distributions		2,318			2,318			3,091			3,357			4,145			4,145			10,355
Premium on redemption of Preferred Shares/Preference Units		—			—			—			3,486			—			—			5,152
Total combined fixed charges and preferred distributions	$	320,508		$	440,292		$	549,421		$	522,016		$	525,475		$	660,956		$	514,788
Ratio of earnings before combined fixed charges to total    combined fixed charges (1) (2)		2.49			10.44			9.10			2.63			2.15			—			1.24
Ratio of earnings before combined fixed charges and    preferred distributions to total combined fixed charges    and preferred distributions (1) (2)		2.48			10.39			9.05			2.61			2.14			—			1.24

(1) For the years ended December 31, 2016, 2015 and 2014, and the nine months ended September 30, 2017 and 2016, the ratios have been increased primarily due to gains on the sales of real estate properties that were not included in discontinued operations as a result of the Company’s adoption of the accounting standard effective January 1, 2014.

(2) For the year ended December 31, 2013, the coverage deficiency approximated $219.8 million.  All 2013 and prior year ratios have been reduced due to the disposition of properties which resulted in the inclusion of those properties in discontinued operations. The ratios have been further reduced due to non-cash depreciation expense and impairment charges and premiums on the redemption of Preferred Shares/Preference Units. The Company was in compliance with its unsecured public debt covenants for all periods presented.

EX-31.1

Exhibit 31.1

Equity Residential

CERTIFICATIONS

I, David J. Neithercut, certify that:

1. I have reviewed this quarterly report on Form 10-Q of EquityResidential;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessarytomakethestatementsmade,inlightofthecircumstancesunderwhichsuchstatementsweremade,notmisleading with respect to the period covered by thisreport;

3. Basedonmyknowledge,thefinancialstatements,andotherfinancialinformationincludedinthisreport,fairlypresentinall material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in thisreport;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant andhave:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalentfunctions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 1, 2017

/s/ David J. Neithercut

    David J. Neithercut

    Chief Executive Officer

EX-31.2

Exhibit 31.2

Equity Residential

CERTIFICATIONS

I, Mark J. Parrell, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Equity Residential;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessarytomakethestatementsmade,inlightofthecircumstancesunderwhichsuchstatementsweremade,notmisleading with respect to the period covered by thisreport;

3. Basedonmyknowledge,thefinancialstatements,andotherfinancialinformationincludedinthisreport,fairlypresentinall material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in thisreport;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 1, 2017

/s/ Mark J. Parrell

    Mark J. Parrell

    Chief Financial Officer

EX-31.3

Exhibit 31.3

ERP Operating Limited Partnership

CERTIFICATIONS

I, David J. Neithercut, certify that:

1. I have reviewed this quarterly report on Form 10-Q of ERP Operating Limited Partnership;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Basedonmyknowledge,thefinancialstatements,andotherfinancialinformationincludedinthisreport,fairlypresentinall material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in thisreport;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 1, 2017

/s/ David J. Neithercut

    David J. Neithercut

    Chief Executive Officer of Registrant’s General Partner

EX-31.4

Exhibit 31.4

ERP Operating Limited Partnership

CERTIFICATIONS

I, Mark J. Parrell, certify that:

1. I have reviewed this quarterly report on Form 10-Q of ERP Operating Limited Partnership;

2. Basedonmyknowledge,thisreportdoesnotcontainanyuntruestatementofamaterialfactoromittostateamaterial factnecessarytomakethestatementsmade,inlightofthecircumstancesunderwhichsuchstatementsweremade,not misleading with respect to the period covered by thisreport;

3. Basedonmyknowledge,thefinancialstatements,andotherfinancialinformationincludedinthisreport,fairlypresentinall material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in thisreport;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 1, 2017

/s/ Mark J. Parrell

    Mark J. Parrell

    Chief Financial Officer of Registrant’s General Partner

EX-32.1

Exhibit 32.1

Equity Residential

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION906OFTHESARBANES-OXLEYACTOF2002

InconnectionwiththeQuarterlyReportofEquityResidential(the“Company”)onForm10-QfortheperiodendingSeptember 30, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David J. Neithercut, Chief ExecutiveOfficeroftheCompany,certify,pursuantto18U.S.C.§1350,asadoptedpursuantto§906oftheSarbanes-OxleyAct of 2002, that, to the best of myknowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ DavidJ.Neithercut

David J.Neithercut

Chief Executive Officer

November 1, 2017

EX-32.2

Exhibit 32.2

Equity Residential

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION906OFTHESARBANES-OXLEYACTOF2002

InconnectionwiththeQuarterlyReportofEquityResidential(the“Company”)onForm10-QfortheperiodendingSeptember 30, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”),I,MarkJ.Parrell,ChiefFinancial OfficeroftheCompany,certify,pursuantto18U.S.C.§1350,asadoptedpursuantto§906oftheSarbanes-OxleyActof2002, that, to the best of myknowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ MarkJ.Parrell

Mark J.Parrell

Chief Financial Officer

November 1, 2017

EX-32.3

Exhibit 32.3

ERP Operating Limited Partnership

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION906OFTHESARBANES-OXLEYACTOF2002

In connection with the Quarterly Report of ERP Operating Limited Partnership (the “Operating Partnership”) on Form 10-QfortheperiodendingSeptember 30,2017asfiledwiththeSecuritiesandExchangeCommissiononthedatehereof(the“Report”), I,DavidJ.Neithercut,ChiefExecutiveOfficerofEquityResidential,generalpartneroftheOperatingPartnership,certify,pursuant to18U.S.C.§1350,asadoptedpursuantto§906oftheSarbanes-OxleyActof2002,that,tothebestofmyknowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the OperatingPartnership.

/s/ David J. Neithercut

David J. Neithercut

Chief Executive Officer

of Registrant’s General Partner  

November 1, 2017

EX-32.4

Exhibit 32.4

ERP Operating Limited Partnership

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION906OFTHESARBANES-OXLEYACTOF2002

In connection with the Quarterly Report of ERP Operating Limited Partnership (the “Operating Partnership”) on Form 10-QfortheperiodendingSeptember 30,2017asfiledwiththeSecuritiesandExchangeCommissiononthedatehereof(the“Report”), I,MarkJ.Parrell,ChiefFinancialOfficerofEquityResidential,generalpartneroftheOperatingPartnership,certify,pursuantto 18U.S.C.§1350,asadoptedpursuantto§906oftheSarbanes-OxleyActof2002,that,tothebestofmyknowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the OperatingPartnership.

/s/ Mark J. Parrell

Mark J. Parrell

Chief Financial Officer

of Registrant’s General Partner

November 1, 2017

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document And Entity Information [Line Items]
Entity Registrant Name	EQUITY RESIDENTIAL
Entity Central Index Key	0000906107
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	EQR
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		367,484,786
ERPOP [Member]
Document And Entity Information [Line Items]
Entity Registrant Name	ERP OPERATING LIMITED PARTNERSHIP
Entity Central Index Key	0000931182
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer

XML

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investment in real estate
Land	$ 5,985,004	$ 5,899,862
Depreciable property	19,571,402	18,730,579
Projects under development	293,064	637,168
Land held for development	99,073	118,816
Investment in real estate	25,948,543	25,386,425
Accumulated depreciation	(5,849,110)	(5,360,389)
Investment in real estate, net	20,099,433	20,026,036
Cash and cash equivalents	46,565	77,207
Investments in unconsolidated entities	59,029	60,141
Deposits – restricted	36,639	76,946
Escrow deposits – mortgage	10,972	64,935
Other assets	445,195	398,883
Total assets	20,697,833	20,704,148
Liabilities:
Mortgage notes payable, net	3,619,180	4,119,181
Notes, net	5,143,248	4,848,079
Line of credit and commercial paper	229,844	19,998
Accounts payable and accrued expenses	167,984	147,482
Accrued interest payable	72,811	60,946
Other liabilities	332,650	350,466
Security deposits	65,230	62,624
Distributions payable	192,569	192,296
Total liabilities	9,823,516	9,801,072
Commitments and contingencies
Redeemable Noncontrolling Interests – Operating Partnership	380,541	442,092
Shareholders' equity:
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 745,600 shares issued and outstanding as of September 30, 2017 and December 31, 2016	37,280	37,280
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 367,462,480 shares issued and outstanding as of September 30, 2017 and 365,870,924 shares issued and outstanding as of December 31, 2016	3,675	3,659
Paid in capital	8,848,739	8,758,422
Retained earnings	1,464,249	1,543,626
Accumulated other comprehensive (loss)	(94,674)	(113,909)
Total shareholders’ equity	10,259,269	10,229,078
Noncontrolling Interests:
Operating Partnership	228,332	221,297
Partially Owned Properties	6,175	10,609
Total Noncontrolling Interests	234,507	231,906
Total equity	10,493,776	10,460,984
Total liabilities and equity/capital	$ 20,697,833	$ 20,704,148

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Shares Issued	745,600	745,600
Preferred Stock, Shares Outstanding	745,600	745,600
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	367,462,480	365,870,924
Common Stock, Shares, Outstanding	367,462,480	365,870,924

XML

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
REVENUES
Rental income	$ 623,951	$ 605,856	$ 1,840,170	$ 1,816,960
Fee and asset management	171	218	532	3,351
Total revenues	624,122	606,074	1,840,702	1,820,311
EXPENSES
Property and maintenance	104,721	104,216	306,645	309,688
Real estate taxes and insurance	84,087	81,343	253,318	238,954
Property management	20,861	19,517	64,702	64,003
General and administrative	12,567	12,395	40,366	47,408
Depreciation	184,100	179,230	542,964	528,242
Total expenses	406,336	396,701	1,207,995	1,188,295
Operating income	217,786	209,373	632,707	632,016
Interest and other income	3,945	5,509	5,708	65,092
Other expenses	(1,028)	(10,420)	(3,160)	(14,480)
Interest:
Expense incurred, net	(91,145)	(86,352)	(288,579)	(386,316)
Amortization of deferred financing costs	(2,064)	(2,261)	(6,447)	(10,000)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	127,494	115,849	340,229	286,312
Income and other tax (expense) benefit	(228)	(426)	(710)	(1,189)
(Loss) income from investments in unconsolidated entities	(398)	7,750	(2,153)	5,846
Net gain on sales of real estate properties	17,328	90,036	141,761	3,870,871
Net gain on sales of land parcels		4,037	19,170	15,759
Income from continuing operations	144,196	217,246	498,297	4,177,599
Discontinued operations, net	0	246	0	124
Net income	144,196	217,492	498,297	4,177,723
Net (income) attributable to Noncontrolling Interests:
Operating Partnership	(5,166)	(8,353)	(17,931)	(160,442)
Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Net income attributable to controlling interests	138,229	208,316	478,012	4,014,913
Preferred distributions	(772)	(773)	(2,318)	(2,318)
Net income available to Common Shares	$ 137,457	$ 207,543	$ 475,694	$ 4,012,595
Earnings per share – basic:
Income from continuing operations available to Common Shares	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Net income available to Common Shares	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Weighted average Common Shares outstanding	366,996	365,109	366,809	364,917
Earnings per share – diluted:
Income from continuing operations available to Common Shares	$ 0.37	$ 0.56	$ 1.29	$ 10.92
Net income available to Common Shares	$ 0.37	$ 0.56	$ 1.29	$ 10.92
Weighted average Common Shares outstanding	382,945	382,373	382,640	382,284
Distributions declared per Common Share outstanding	$ 0.50375	$ 3.50375	$ 1.51125	$ 12.51125

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (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	(6,201)	(9,362)	(20,983)	(164,096)
Comprehensive income attributable to controlling interests	$ 144,472	$ 212,911	$ 496,549	$ 4,046,913

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 498,297	$ 4,177,723
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	542,964	528,242
Amortization of deferred financing costs	6,447	10,000
Amortization of above/below market lease intangibles	2,729	2,566
Amortization of discounts and premiums on debt	4,939	(18,328)
Amortization of deferred settlements on derivative instruments	14,010	37,187
Write-off of pursuit costs	2,329	3,379
Loss (income) from investments in unconsolidated entities	2,153	(5,846)
Distributions from unconsolidated entities – return on capital	2,031	2,165
Net (gain) on sales of investment securities and other investments		(58,416)
Net (gain) on sales of real estate properties	(141,761)	(3,870,871)
Net (gain) on sales of land parcels	(19,170)	(15,759)
Net (gain) on sales of discontinued operations		(43)
Compensation paid with Company Common Shares	19,999	25,540
Changes in assets and liabilities:
Decrease in deposits – restricted	788	9,992
Decrease in mortgage deposits	1,447	222
(Increase) decrease in other assets	(23,024)	4,248
Increase in accounts payable and accrued expenses	62,635	41,371
Increase (decrease) in accrued interest payable	11,865	(15,780)
(Decrease) in other liabilities	(28,250)	(24,749)
Increase (decrease) in security deposits	2,606	(13,522)
Net cash provided by operating activities	963,034	819,321
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(466,395)	(205,881)
Investment in real estate – development/other	(227,187)	(454,502)
Capital expenditures to real estate	(143,258)	(124,551)
Non-real estate capital additions	(776)	(4,467)
Interest capitalized for real estate under development	(23,164)	(41,658)
Proceeds from disposition of real estate, net	350,000	6,584,126
Investments in unconsolidated entities	(5,324)	(3,826)
Distributions from unconsolidated entities – return of capital	329	13,798
Proceeds from sale of investment securities and other investments		72,815
Decrease (increase) in deposits on real estate acquisitions and investments, net	39,519	(83,668)
(Increase) in mortgage deposits	(4,541)	(21)
Net cash (used for) provided by investing activities	(480,797)	5,752,165
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,272)	(507)
Mortgage deposits	57,057	(6,249)
Mortgage notes payable, net:
Lump sum payoffs	(493,420)	(565,084)
Scheduled principal repayments	(8,771)	(6,644)
Notes, net:
Proceeds	692,466
Lump sum payoffs	(394,077)	(1,500,000)
Line of credit and commercial paper:
Line of credit proceeds	1,845,000	246,000
Line of credit repayments	(1,845,000)	(246,000)
Commercial paper proceeds	3,888,675	1,324,784
Commercial paper repayments	(3,681,750)	(1,712,472)
Proceeds from settlement of derivative instruments	1,296
Proceeds from Employee Share Purchase Plan (ESPP)	2,963	2,778
Proceeds from exercise of options	12,967	26,939
Payment of offering costs	(36)	(304)
Other financing activities, net	(40)	(33)
Contributions – Noncontrolling Interests – Partially Owned Properties	125
Contributions – Noncontrolling Interests – Operating Partnership		1
Distributions:
Common Shares	(554,267)	(3,490,838)
Preferred Shares	(2,318)	(2,318)
Noncontrolling Interests – Operating Partnership	(20,604)	(137,641)
Noncontrolling Interests – Partially Owned Properties	(6,873)	(28,588)
Net cash (used for) financing activities	(512,879)	(6,096,176)
Net (decrease) increase in cash and cash equivalents	(30,642)	475,310
Cash and cash equivalents, beginning of period	77,207	42,276
Cash and cash equivalents, end of period	46,565	517,586
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	257,805	383,374
Net cash paid for income and other taxes	964	1,333
Real estate acquisitions/dispositions/other:
Mortgage loans assumed		43,400
Amortization of deferred financing costs:
Other assets	1,810	2,291
Mortgage notes payable, net	1,943	3,320
Notes, net	2,694	4,389
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	247	(21,318)
Notes, net	1,771	2,578
Line of credit and commercial paper	2,921	412
Amortization of deferred settlements on derivative instruments:
Other liabilities	(9)	(75)
Accumulated other comprehensive income	14,019	37,262
Write-off of pursuit costs:
Investment in real estate, net	2,292	2,876
Other assets	17	399
Accounts payable and accrued expenses	20	104
Loss (income) from investments in unconsolidated entities:
Investments in unconsolidated entities	1,076	(6,999)
Other liabilities	1,077	1,153
Realized/unrealized (gain) loss on derivative instruments:
Other assets	(3,803)	(4,563)
Notes, net	(1,413)	4,563
Other liabilities		4,240
Accumulated other comprehensive income	5,216	(4,240)
Investments in unconsolidated entities:
Investments in unconsolidated entities	(2,324)	(1,726)
Other liabilities	(3,000)	(2,100)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	329	14,014
Other assets		(216)
Debt financing costs:
Mortgage notes payable, net		(507)
Notes, net	$ (6,272)
Other:
Foreign currency translation adjustments		$ (264)

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CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	PREFERRED SHARES	COMMON SHARES, $0.01 PAR VALUE	PAID IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE (LOSS)	OPERATING PARTNERSHIP	PARTIALLY OWNED PROPERTIES
Balance, beginning of year at Dec. 31, 2016	$ 10,229,078	$ 37,280	$ 3,659	$ 8,758,422	$ 1,543,626	$ (113,909)
Balance, beginning of year at Dec. 31, 2016	231,906						$ 221,297	$ 10,609
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			11	14,706			(14,717)
Exercise of share options			3	12,964
Employee Share Purchase Plan (ESPP)			1	2,962
Restricted shares			1	7,488
Share options				6,384
ESPP discount				586
PAID IN CAPITAL
Conversion of OP Units into Common Shares			11	14,706			(14,717)
Exercise of share options			3	12,964
Employee Share Purchase Plan (ESPP)			1	2,962
Share-based employee compensation expense
Offering costs				(36)
Supplemental Executive Retirement Plan (SERP)				(594)
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership	(29,551)			29,551
Adjustment for Noncontrolling Interests ownership in Operating Partnership				16,306			(16,306)
RETAINED EARNINGS
Net income attributable to controlling interests	478,012				478,012
Common Share distributions					(555,071)
Preferred Share distributions					(2,318)
Accumulated other comprehensive income – derivative instruments:
Unrealized holding gains (losses) arising during the period	5,216					5,216
Losses reclassified into earnings from other comprehensive income	(14,019)					14,019
OPERATING PARTNERSHIP
Conversion of OP Units into Common Shares			11	14,706			(14,717)
Equity compensation associated with Noncontrolling Interests							8,200
Net income	498,297
Distributions to Noncontrolling Interests							(20,073)	(6,913)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(32,000)						32,000
Adjustment for Noncontrolling Interests ownership in Operating Partnership				16,306			(16,306)
Net income attributable to Noncontrolling Interests	17,931						17,931	2,354
PARTIALLY OWNED PROPERTIES
Net income	498,297
Distributions to Noncontrolling Interests							(20,073)	(6,913)
Net income attributable to Noncontrolling Interests	17,931						17,931	2,354
Contributions – Noncontrolling Interests – Partially Owned Properties	125							125
Balance, end of period at Sep. 30, 2017	10,259,269	$ 37,280	$ 3,675	$ 8,848,739	$ 1,464,249	$ (94,674)
Balance, end of period at Sep. 30, 2017	$ 234,507						$ 228,332	$ 6,175

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CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investment in real estate
Land	$ 5,985,004	$ 5,899,862
Depreciable property	19,571,402	18,730,579
Projects under development	293,064	637,168
Land held for development	99,073	118,816
Investment in real estate	25,948,543	25,386,425
Accumulated depreciation	(5,849,110)	(5,360,389)
Investment in real estate, net	20,099,433	20,026,036
Cash and cash equivalents	46,565	77,207
Investments in unconsolidated entities	59,029	60,141
Deposits – restricted	36,639	76,946
Escrow deposits – mortgage	10,972	64,935
Other assets	445,195	398,883
Total assets	20,697,833	20,704,148
Liabilities:
Mortgage notes payable, net	3,619,180	4,119,181
Notes, net	5,143,248	4,848,079
Line of credit and commercial paper	229,844	19,998
Accounts payable and accrued expenses	167,984	147,482
Accrued interest payable	72,811	60,946
Other liabilities	332,650	350,466
Security deposits	65,230	62,624
Distributions payable	192,569	192,296
Total liabilities	9,823,516	9,801,072
Commitments and contingencies
Partners' Capital:
Accumulated other comprehensive (loss)	(94,674)	(113,909)
Noncontrolling Interests – Partially Owned Properties	6,175	10,609
Total liabilities and equity/capital	20,697,833	20,704,148
ERPOP [Member]
Investment in real estate
Land	5,985,004	5,899,862
Depreciable property	19,571,402	18,730,579
Projects under development	293,064	637,168
Land held for development	99,073	118,816
Investment in real estate	25,948,543	25,386,425
Accumulated depreciation	(5,849,110)	(5,360,389)
Investment in real estate, net	20,099,433	20,026,036
Cash and cash equivalents	46,565	77,207
Investments in unconsolidated entities	59,029	60,141
Deposits – restricted	36,639	76,946
Escrow deposits – mortgage	10,972	64,935
Other assets	445,195	398,883
Total assets	20,697,833	20,704,148
Liabilities:
Mortgage notes payable, net	3,619,180	4,119,181
Notes, net	5,143,248	4,848,079
Line of credit and commercial paper	229,844	19,998
Accounts payable and accrued expenses	167,984	147,482
Accrued interest payable	72,811	60,946
Other liabilities	332,650	350,466
Security deposits	65,230	62,624
Distributions payable	192,569	192,296
Total liabilities	9,823,516	9,801,072
Commitments and contingencies
Redeemable Limited Partners	380,541	442,092
Partners' Capital:
Preference Units	37,280	37,280
General Partner	10,316,663	10,305,707
Limited Partners	228,332	221,297
Accumulated other comprehensive (loss)	(94,674)	(113,909)
Total partners' capital	10,487,601	10,450,375
Noncontrolling Interests – Partially Owned Properties	6,175	10,609
Total capital	10,493,776	10,460,984
Total liabilities and equity/capital	$ 20,697,833	$ 20,704,148

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CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
REVENUES
Rental income	$ 623,951	$ 605,856	$ 1,840,170	$ 1,816,960
Fee and asset management	171	218	532	3,351
Total revenues	624,122	606,074	1,840,702	1,820,311
EXPENSES
Property and maintenance	104,721	104,216	306,645	309,688
Real estate taxes and insurance	84,087	81,343	253,318	238,954
Property management	20,861	19,517	64,702	64,003
General and administrative	12,567	12,395	40,366	47,408
Depreciation	184,100	179,230	542,964	528,242
Total expenses	406,336	396,701	1,207,995	1,188,295
Operating income	217,786	209,373	632,707	632,016
Interest and other income	3,945	5,509	5,708	65,092
Other expenses	(1,028)	(10,420)	(3,160)	(14,480)
Interest:
Expense incurred, net	(91,145)	(86,352)	(288,579)	(386,316)
Amortization of deferred financing costs	(2,064)	(2,261)	(6,447)	(10,000)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	127,494	115,849	340,229	286,312
Income and other tax (expense) benefit	(228)	(426)	(710)	(1,189)
(Loss) income from investments in unconsolidated entities	(398)	7,750	(2,153)	5,846
Net gain on sales of real estate properties	17,328	90,036	141,761	3,870,871
Net gain on sales of land parcels		4,037	19,170	15,759
Income from continuing operations	144,196	217,246	498,297	4,177,599
Discontinued operations, net	0	246	0	124
Net income	144,196	217,492	498,297	4,177,723
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Net income attributable to controlling interests	$ 138,229	$ 208,316	$ 478,012	$ 4,014,913
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Net income available to Units	0.37	0.57	1.30	11.00
Earnings per Unit – diluted:
Income from continuing operations available to Units	0.37	0.56	1.29	10.92
Net income available to Units	$ 0.37	$ 0.56	$ 1.29	$ 10.92
Weighted average Units outstanding	382,945	382,373	382,640	382,284
ERPOP [Member]
REVENUES
Rental income	$ 623,951	$ 605,856	$ 1,840,170	$ 1,816,960
Fee and asset management	171	218	532	3,351
Total revenues	624,122	606,074	1,840,702	1,820,311
EXPENSES
Property and maintenance	104,721	104,216	306,645	309,688
Real estate taxes and insurance	84,087	81,343	253,318	238,954
Property management	20,861	19,517	64,702	64,003
General and administrative	12,567	12,395	40,366	47,408
Depreciation	184,100	179,230	542,964	528,242
Total expenses	406,336	396,701	1,207,995	1,188,295
Operating income	217,786	209,373	632,707	632,016
Interest and other income	3,945	5,509	5,708	65,092
Other expenses	(1,028)	(10,420)	(3,160)	(14,480)
Interest:
Expense incurred, net	(91,145)	(86,352)	(288,579)	(386,316)
Amortization of deferred financing costs	(2,064)	(2,261)	(6,447)	(10,000)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	127,494	115,849	340,229	286,312
Income and other tax (expense) benefit	(228)	(426)	(710)	(1,189)
(Loss) income from investments in unconsolidated entities	(398)	7,750	(2,153)	5,846
Net gain on sales of real estate properties	17,328	90,036	141,761	3,870,871
Net gain on sales of land parcels		4,037	19,170	15,759
Income from continuing operations	144,196	217,246	498,297	4,177,599
Discontinued operations, net	0	246	0	124
Net income	144,196	217,492	498,297	4,177,723
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Net income attributable to controlling interests	143,395	216,669	495,943	4,175,355
ALLOCATION OF NET INCOME:
Preference Units	772	773	2,318	2,318
General Partner	137,457	207,543	475,694	4,012,595
Limited Partners	5,166	8,353	17,931	160,442
Net income available to Units	$ 142,623	$ 215,896	$ 493,625	$ 4,173,037
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Net income available to Units	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Weighted average Units outstanding	379,906	379,008	379,716	378,745
Earnings per Unit – diluted:
Income from continuing operations available to Units	$ 0.37	$ 0.56	$ 1.29	$ 10.92
Net income available to Units	$ 0.37	$ 0.56	$ 1.29	$ 10.92
Weighted average Units outstanding	382,945	382,373	382,640	382,284
Distributions declared per Unit outstanding	$ 0.50375	$ 3.50375	$ 1.51125	$ 12.51125

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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

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CONSOLIDATED STATEMENTS OF CASH FLOWS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 498,297	$ 4,177,723
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	542,964	528,242
Amortization of deferred financing costs	6,447	10,000
Amortization of above/below market lease intangibles	2,729	2,566
Amortization of discounts and premiums on debt	4,939	(18,328)
Amortization of deferred settlements on derivative instruments	14,010	37,187
Write-off of pursuit costs	2,329	3,379
Loss (income) from investments in unconsolidated entities	2,153	(5,846)
Distributions from unconsolidated entities – return on capital	2,031	2,165
Net (gain) on sales of investment securities and other investments		(58,416)
Net (gain) on sales of real estate properties	(141,761)	(3,870,871)
Net (gain) on sales of land parcels	(19,170)	(15,759)
Net (gain) on sales of discontinued operations		(43)
Compensation paid with Company Common Shares	19,999	25,540
Changes in assets and liabilities:
Decrease in deposits – restricted	788	9,992
Decrease in mortgage deposits	1,447	222
(Increase) decrease in other assets	(23,024)	4,248
Increase in accounts payable and accrued expenses	62,635	41,371
Increase (decrease) in accrued interest payable	11,865	(15,780)
(Decrease) in other liabilities	(28,250)	(24,749)
Increase (decrease) in security deposits	2,606	(13,522)
Net cash provided by operating activities	963,034	819,321
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(466,395)	(205,881)
Investment in real estate – development/other	(227,187)	(454,502)
Capital expenditures to real estate	(143,258)	(124,551)
Non-real estate capital additions	(776)	(4,467)
Interest capitalized for real estate under development	(23,164)	(41,658)
Proceeds from disposition of real estate, net	350,000	6,584,126
Investments in unconsolidated entities	(5,324)	(3,826)
Distributions from unconsolidated entities – return of capital	329	13,798
Proceeds from sale of investment securities and other investments		72,815
Decrease (increase) in deposits on real estate acquisitions and investments, net	39,519	(83,668)
(Increase) in mortgage deposits	(4,541)	(21)
Net cash (used for) provided by investing activities	(480,797)	5,752,165
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,272)	(507)
Mortgage deposits	57,057	(6,249)
Mortgage notes payable, net:
Lump sum payoffs	(493,420)	(565,084)
Scheduled principal repayments	(8,771)	(6,644)
Notes, net:
Proceeds	692,466
Lump sum payoffs	(394,077)	(1,500,000)
Line of credit and commercial paper:
Line of credit proceeds	1,845,000	246,000
Line of credit repayments	(1,845,000)	(246,000)
Commercial paper proceeds	3,888,675	1,324,784
Commercial paper repayments	(3,681,750)	(1,712,472)
Proceeds from settlement of derivative instruments	1,296
Proceeds from EQR's Employee Share Purchase Plan (ESPP)	2,963	2,778
Proceeds from exercise of EQR options	12,967	26,939
Payment of offering costs	(36)	(304)
Other financing activities, net	(40)	(33)
Contributions – Noncontrolling Interests – Partially Owned Properties	125
Contributions – Limited Partners		1
Distributions:
OP Units – General Partner	(554,267)	(3,490,838)
Preference Units	(2,318)	(2,318)
OP Units – Limited Partners	(20,604)	(137,641)
Noncontrolling Interests – Partially Owned Properties	(6,873)	(28,588)
Net cash (used for) financing activities	(512,879)	(6,096,176)
Net (decrease) increase in cash and cash equivalents	(30,642)	475,310
Cash and cash equivalents, beginning of period	77,207	42,276
Cash and cash equivalents, end of period	46,565	517,586
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	257,805	383,374
Net cash paid for income and other taxes	964	1,333
Real estate acquisitions/dispositions/other:
Mortgage loans assumed		43,400
Amortization of deferred financing costs:
Other assets	1,810	2,291
Mortgage notes payable, net	1,943	3,320
Notes, net	2,694	4,389
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	247	(21,318)
Notes, net	1,771	2,578
Line of credit and commercial paper	2,921	412
Amortization of deferred settlements on derivative instruments:
Other liabilities	(9)	(75)
Accumulated other comprehensive income	14,019	37,262
Write-off of pursuit costs:
Investment in real estate, net	2,292	2,876
Other assets	17	399
Accounts payable and accrued expenses	20	104
Loss (income) from investments in unconsolidated entities:
Investments in unconsolidated entities	1,076	(6,999)
Other liabilities	1,077	1,153
Realized/unrealized (gain) loss on derivative instruments:
Other assets	(3,803)	(4,563)
Notes, net	(1,413)	4,563
Other liabilities		4,240
Accumulated other comprehensive income	5,216	(4,240)
Investments in unconsolidated entities:
Investments in unconsolidated entities	(2,324)	(1,726)
Other liabilities	(3,000)	(2,100)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	329	14,014
Other assets		(216)
Debt financing costs:
Mortgage notes payable, net		(507)
Notes, net	(6,272)
Other:
Foreign currency translation adjustments		(264)
ERPOP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	498,297	4,177,723
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	542,964	528,242
Amortization of deferred financing costs	6,447	10,000
Amortization of above/below market lease intangibles	2,729	2,566
Amortization of discounts and premiums on debt	4,939	(18,328)
Amortization of deferred settlements on derivative instruments	14,010	37,187
Write-off of pursuit costs	2,329	3,379
Loss (income) from investments in unconsolidated entities	2,153	(5,846)
Distributions from unconsolidated entities – return on capital	2,031	2,165
Net (gain) on sales of investment securities and other investments		(58,416)
Net (gain) on sales of real estate properties	(141,761)	(3,870,871)
Net (gain) on sales of land parcels	(19,170)	(15,759)
Net (gain) on sales of discontinued operations		(43)
Compensation paid with Company Common Shares	19,999	25,540
Changes in assets and liabilities:
Decrease in deposits – restricted	788	9,992
Decrease in mortgage deposits	1,447	222
(Increase) decrease in other assets	(23,024)	4,248
Increase in accounts payable and accrued expenses	62,635	41,371
Increase (decrease) in accrued interest payable	11,865	(15,780)
(Decrease) in other liabilities	(28,250)	(24,749)
Increase (decrease) in security deposits	2,606	(13,522)
Net cash provided by operating activities	963,034	819,321
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(466,395)	(205,881)
Investment in real estate – development/other	(227,187)	(454,502)
Capital expenditures to real estate	(143,258)	(124,551)
Non-real estate capital additions	(776)	(4,467)
Interest capitalized for real estate under development	(23,164)	(41,658)
Proceeds from disposition of real estate, net	350,000	6,584,126
Investments in unconsolidated entities	(5,324)	(3,826)
Distributions from unconsolidated entities – return of capital	329	13,798
Proceeds from sale of investment securities and other investments		72,815
Decrease (increase) in deposits on real estate acquisitions and investments, net	39,519	(83,668)
(Increase) in mortgage deposits	(4,541)	(21)
Net cash (used for) provided by investing activities	(480,797)	5,752,165
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,272)	(507)
Mortgage deposits	57,057	(6,249)
Mortgage notes payable, net:
Lump sum payoffs	(493,420)	(565,084)
Scheduled principal repayments	(8,771)	(6,644)
Notes, net:
Proceeds	692,466
Lump sum payoffs	(394,077)	(1,500,000)
Line of credit and commercial paper:
Line of credit proceeds	1,845,000	246,000
Line of credit repayments	(1,845,000)	(246,000)
Commercial paper proceeds	3,888,675	1,324,784
Commercial paper repayments	(3,681,750)	(1,712,472)
Proceeds from settlement of derivative instruments	1,296
Proceeds from EQR's Employee Share Purchase Plan (ESPP)	2,963	2,778
Proceeds from exercise of EQR options	12,967	26,939
Payment of offering costs	(36)	(304)
Other financing activities, net	(40)	(33)
Contributions – Noncontrolling Interests – Partially Owned Properties	125
Contributions – Limited Partners		1
Distributions:
OP Units – General Partner	(554,267)	(3,490,838)
Preference Units	(2,318)	(2,318)
OP Units – Limited Partners	(20,604)	(137,641)
Noncontrolling Interests – Partially Owned Properties	(6,873)	(28,588)
Net cash (used for) financing activities	(512,879)	(6,096,176)
Net (decrease) increase in cash and cash equivalents	(30,642)	475,310
Cash and cash equivalents, beginning of period	77,207	42,276
Cash and cash equivalents, end of period	46,565	517,586
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	257,805	383,374
Net cash paid for income and other taxes	964	1,333
Real estate acquisitions/dispositions/other:
Mortgage loans assumed		43,400
Amortization of deferred financing costs:
Other assets	1,810	2,291
Mortgage notes payable, net	1,943	3,320
Notes, net	2,694	4,389
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	247	(21,318)
Notes, net	1,771	2,578
Line of credit and commercial paper	2,921	412
Amortization of deferred settlements on derivative instruments:
Other liabilities	(9)	(75)
Accumulated other comprehensive income	14,019	37,262
Write-off of pursuit costs:
Investment in real estate, net	2,292	2,876
Other assets	17	399
Accounts payable and accrued expenses	20	104
Loss (income) from investments in unconsolidated entities:
Investments in unconsolidated entities	1,076	(6,999)
Other liabilities	1,077	1,153
Realized/unrealized (gain) loss on derivative instruments:
Other assets	(3,803)	(4,563)
Notes, net	(1,413)	4,563
Other liabilities		4,240
Accumulated other comprehensive income	5,216	(4,240)
Investments in unconsolidated entities:
Investments in unconsolidated entities	(2,324)	(1,726)
Other liabilities	(3,000)	(2,100)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	329	14,014
Other assets		(216)
Debt financing costs:
Mortgage notes payable, net		(507)
Notes, net	$ (6,272)
Other:
Foreign currency translation adjustments		$ (264)

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CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	ERPOP [Member]	PREFERRED SHARES ERPOP [Member]	General Partner [Member] ERPOP [Member]	Limited Partner [Member] ERPOP [Member]	ACCUMULATED OTHER COMPREHENSIVE (LOSS) [Member] ERPOP [Member]	PARTIALLY OWNED PROPERTIES [Member] ERPOP [Member]
Balance, beginning of year at Dec. 31, 2016			$ 37,280	$ 10,305,707	$ 221,297	$ (113,909)
Balance, beginning of year at Dec. 31, 2016							$ 10,609
OP Unit Issuance:
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				14,717	(14,717)
Exercise of EQR share options				12,967
EQR's Employee Share Purchase Plan (ESPP)				2,963
Share-based employee compensation expense:
EQR restricted shares				7,489
EQR share options				6,384
EQR ESPP discount				586
Net income available to Units – General Partner		$ 475,694		475,694
OP Units – General Partner distributions				(555,071)
Offering costs				(36)
Supplemental Executive Retirement Plan (SERP)				(594)
Change in market value of Redeemable Limited Partners				29,551
Adjustment for Limited Partners ownership in Operating Partnership				16,306	(16,306)
LIMITED PARTNERS
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				14,717	(14,717)
Equity compensation associated with Units – Limited Partners					8,200
Net income available to Units – Limited Partners		17,931			17,931
Units – Limited Partners distributions					(20,073)
Change in carrying value of Redeemable Limited Partners					32,000
Adjustment for Limited Partners ownership in Operating Partnership				16,306	(16,306)
Accumulated other comprehensive income – derivative instruments:
Unrealized holding gains (losses) arising during the period	$ 5,216	5,216				5,216
Losses reclassified into earnings from other comprehensive income	(14,019)	(14,019)				14,019
NONCONTROLLING INTERESTS – PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	498,297	498,297					2,354
Contributions – Noncontrolling Interests – Partially Owned Properties	$ 125	$ 125					125
Distributions to Noncontrolling Interests							(6,913)
Balance, end of period at Sep. 30, 2017			$ 37,280	$ 10,316,663	$ 228,332	$ (94,674)
Balance, end of period at Sep. 30, 2017							$ 6,175

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Business

9 Months Ended

Sep. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Business

1. Business

Equity Residential (“EQR”), a Maryland real estate investment trust (“REIT”) formed in March 1993, is an S&P 500 company focused on the acquisition, development and management of rental apartment properties in urban and high-density suburban coastal gateway markets.  ERP Operating Limited Partnership ("ERPOP"), an Illinois limited partnership, was formed in May 1993 to conduct the multifamily residential property business of Equity Residential.  EQR has elected to betaxed as a REIT.  References to the "Company," "we," "us" or "our" mean collectively EQR, ERPOP and those entities/subsidiaries owned or controlled by EQR and/or ERPOP.  References to the "Operating Partnership" mean collectively ERPOP and those entities/subsidiaries owned or controlled by ERPOP.  Unless otherwise indicated, the notes to consolidated financial statements apply to both the Company and the OperatingPartnership.

EQR is the general partner of, and as of September 30, 2017 owned an approximate 96.4% ownership interest in, ERPOP.  All of the Company's property ownership, development and related business operations are conducted through the Operating PartnershipandEQRhasnomaterialassetsorliabilitiesotherthanitsinvestmentinERPOP.  EQRissuespublicequityfromtime totime,thenetproceedsofwhichitisobligatedtocontributetoERPOP,butdoesnothaveanyindebtednessasalldebtisincurred by the Operating Partnership.  The Operating Partnership holds substantially all of the assets of the Company, including the Company's ownership interests in its joint ventures.  The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly tradedequity.  

As of September 30, 2017, the Company, directly or indirectly through investments in title holding entities, owned all or a portion of 305 properties located in 10 states and the District of Columbia consisting of 78,302 apartment units.  The ownership breakdown includes (table does not include various uncompleted development properties):

	Properties		Apartment Units
Wholly Owned Properties		283		73,289
Master-Leased Properties – Consolidated		3		853
Partially Owned Properties – Consolidated		17		3,215
Partially Owned Properties – Unconsolidated		2		945
		305		78,302

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2017

Summary Of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X.  Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.  In the opinion of management, all adjustments (consisting of normal recurring accruals) and certain reclassifications considered necessary for a fair presentation have been included.  Certain reclassifications have been made to the prior period financial statements in order to conform to the current year presentation.  These reclassifications did not have an impact on net income previously reported.  Operating results for the nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017.

In preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States, management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from these estimates.

The balance sheets at December 31, 2016 have been derived from the audited financial statements at that date but do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

For further information, including definitions of capitalized terms not defined herein, refer to the consolidated financial statements and footnotes thereto included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

Income and Other Taxes

Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level.  In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level.  Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes.  The Company has elected Taxable REIT Subsidiary (“TRS”) status for certain of its corporate subsidiaries and as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses.

Deferred tax assets and liabilities are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases.  These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled.  The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted.  The Company’s deferred tax assets were generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities.  As of September 30, 2017, the Company has elected REIT status for its primary TRS upon filing the 2016 tax return in the third quarter of 2017, with the election retroactive to January 1, 2016.  As a result, the Company wrote-off its deferred tax assets, which were fully reserved, as of September 30, 2017.

Recently Issued Accounting Pronouncements

InMay2014,theFinancialAccountingStandardsBoard(the"FASB")issuedacomprehensivenewrevenuerecognition standard entitled Revenue from Contracts with Customers that will supersede nearly all existing revenue recognition guidance.  Thenewstandardspecificallyexcludesleaserevenue.  Thenewstandard’scoreprincipleisthatacompanywillrecognizerevenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expectstobeentitledinexchangeforthosegoodsorservices.  Companieswilllikelyneedtousemorejudgmentandmakemore estimatesthanundercurrentrevenuerecognitionguidance.  Thesemayincludeidentifyingperformanceobligationsinthecontract, estimating the amount of variable consideration, if any, to include in the transaction price and allocating the transaction price to each separate performance obligation.  The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect, if any, recognized as of the date of adoption.  The Company anticipates selecting the modified retrospective transition method with a cumulative effect recognized as of the date of adoption and will adoptthenewstandardeffectiveJanuary1,2018, when effective.  TheCompanyiscontinuingtoevaluatethestandard;however,wedonotexpect itsadoptiontohaveasignificantimpactontheconsolidatedfinancialstatements,asapproximately95%oftotalrevenuesconsistof rental income from leasing arrangements, which is specifically excluded from the standard.  In addition, the Company'sfee and assetmanagementactivitiesareimmaterialnowthatitsolditsinterestinJointBaseLewisMcChord in 2016andgiventhenatureofitsdispositiontransactions,thereshouldbenochangesinaccountingunderthenewstandard.

InJanuary2016,theFASBissuedanewstandardwhichrequirescompaniestomeasureallequitysecuritieswithreadily determinablefairvaluesatfairvalueonthebalancesheet,withchangesinfairvaluerecognizedinnetincome.  Thenewstandard will be effective for the Company beginning on January 1, 2018.  The Company does not expect that this will have a material effect on its consolidated results of operations or financialposition.

InFebruary2016,the FASB issued a new leases standard which sets out principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessors and lessees).  The new standard requires the following:

• Lessors – Leases will be accounted for using an approach that is substantially equivalent to existing guidance for operating, sales-type and financing leases, but aligned with the new revenue recognition standard.  Lessors will be required to allocate lease payments to separate lease and non-lease components of each lease agreement, with the non-lease components evaluated under the new revenue recognition standard.

• Lessees – Leases will be accounted for using a dual approach, classifying leases as either operating or finance based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee.  This classification will determine whether the lease expense is recognized on a straight-line basis over the term of the lease (for operating leases) or based on an effective interest method with a front-loaded expense recognition (for finance leases).  A lessee is also required to record a right-of-use asset and a lease liability on its balance sheet for all leases with a term of greater than 12 months regardless of their classification as operating or finance leases.  Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases.

The new standard will be effective for the Company beginning on January 1, 2019, with early adoption permitted, though the Company currently anticipates adopting the new standard on the effective date.  The new standard must be adopted using a modified retrospective method, which requires application of the new guidance at the beginning of the earliest comparative period presented and provides for certain practical expedients, which the Company currently anticipates electing.  The Company anticipates that its residential and retail/commercial leases where it is the lessor will continue to be accounted for as operating leases under the new standard.  Therefore, the Company does not currently anticipate significant changes in the accounting for its lease revenues.  The Company is also the lessee under various corporate office and ground leases, which it will be required to recognize right of use assets and related lease liabilities on its consolidated balance sheets upon adoption.  The Company currently anticipates that its corporate office leases where it is the lessee will continue to be accounted for as operating leases under the new standard.  Based on its anticipated election of the practical expedients, the Company would not be required to reassess the classification of existing ground leases and therefore these leases would continue to be accounted for as operating leases.  However, in the event we modify existing ground leases and/or enter into new ground leases after adoption of the new standard, such leases will likely be classified as finance leases.  The Company will continue to evaluate the impact of adopting the new leases standard on its consolidated results of operations and financial position.

In June 2016, the FASB issued a new standard which requires companies to adopt a new approach for estimating credit losses on certain types of financial instruments, such as trade and other receivables and loans.  The standard will require entities to estimate a lifetime expected credit loss for most financial instruments, including trade receivables.  The new standard will be effective for the Company beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019.  TheCompanyiscurrentlyevaluatingtheimpactofadoptingthenewstandardonitsconsolidatedresultsofoperationsand financial position.

InAugust2016andOctober2016,theFASBissuednewstandardstoclarifyhowspecifictransactionsareclassifiedand presented on the statement of cash flows.  Among other clarifications, the new standards specifically provide guidance for the following items within the statement of cash flows which have required significant judgment in thepast:

• Cash payments related to debt prepayments or extinguishment costs are to be classified within financingactivities;

• The portion of the cash payment made to settle a zero-coupon bond or a bond with an insignificant cash coupon attributable to accreted interest related to a debt discount is to be classified as a cash outflow within operating activities, and the portion attributable to the principal is to be classified within financingactivities;

• Insurance settlement proceeds are to be classified based on the nature of theloss;

• Companies must elect to classify distributions received from equity method investees using either a cumulative earnings approach or a look-through approach and the election must be disclosed;and

• Restrictedcashwillbeincludedwithcashandcashequivalentsonthestatementofcashflows.  Totalcashandcash equivalents and restricted cash are to be reconciled to the related line items on the balancesheet.

Thenewstandardsmustbeappliedretrospectivelytoallperiodspresentedintheconsolidatedfinancialstatementsandtheywill beeffectivefortheCompanybeginningonJanuary1,2018,withearlyadoptionpermitted.  TheCompany currently anticipates adopting the new standards in the fourth quarter of 2017 and plans to continue to apply the look-through approach for distributions received from equity method investees.  The Company does not expect overall cash flows to change; however, there will be material changes between cash flow classifications due to the substantial debt prepayment penalties that the Company has incurred in the comparative period.

InFebruary 2017,theFASB issuedanewstandardwhich clarifies the accounting treatment for partial sales of nonfinancial assets (i.e. real estate).  The standard clarifies that partial sales transactions include contributions of nonfinancial assets to a joint venture or other noncontrolled investee.  Companies must recognize a full gain or loss on transfers of nonfinancial assets to equity method investees.  The standard requires companies to derecognize distinct nonfinancial assets or distinct in substance nonfinancial assets in partial sale transactions when it does not have a controlling financial interest in the legal entity that holds the asset and transfers control of the asset.  Once the distinct nonfinancial asset is transferred, the company is required to measure any non-controlling interest it receives or retains at fair value and recognize a full gain or loss on the transaction.  If a company transfers ownership interests in a consolidated subsidiary and continues to maintain a controlling financial interest, the company does not derecognize the assets or liabilities, and accounts for the transaction as an equity transaction and no gain or loss is recognized. The new standard will be effective for the Company beginning on January 1, 2018 and early adoption was permitted beginning on January 1, 2017.  The Company anticipates adopting the new standard concurrently with the new revenue recognition standard.  The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect recognized as of the date of adoption.  The Company has not had a partial sale of nonfinancial assets in the current or comparative periods.  Therefore, the Company does not currently believe that the adoption of this standard will have a material impact on its consolidated results of operations and financial position.

In August 2017, the FASB issued a final standard which makes changes to the hedge accounting model to enable entities to better portray their risk management activities in the financial statements.  The new standard expands an entity’s ability to hedge nonfinancial and financial risk components, reduces complexity in fair value hedges of interest rate risk and eases certain documentation and assessment requirements.  The new standard also eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of any hedging instrument to be presented in the same income statement line as the hedged instrument.  The new standard will be effective for the Company beginning on January 1, 2019 and early adoption is permitted.  The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position.

Recently Adopted Accounting Pronouncements

InFebruary2015,theFASBissuednewconsolidationguidancewhichmadechangestoboththevariableinterestmodel andthevotingmodel.  Amongotherchanges,thenewstandardspecificallyeliminatedthepresumptioninthecurrentvotingmodel that a general partner controls a limited partnership or similar entity unless that presumption can be overcome.  Generally, only a singlelimitedpartnerthatisabletoexercisesubstantivekick-outrightswillconsolidate.  TheCompanyadoptedthisnewstandard as required effective January 1, 2016.  While adoption of the new standard did not result in any changes to conclusions about whetherajointventurewasconsolidatedorunconsolidated,theCompanyhasdeterminedthatcertainofitsjointventuresandthe OperatingPartnershipwillnowqualifyasvariableinterestentities("VIEs")andthereforewillrequireadditionaldisclosures.  See Note 6 for further discussion.

InMarch2016,theFASBissuedanewstandardwhichsimplifiedseveralaspectsoftheaccountingforemployeeshare-basedpaymenttransactions,includingincometaxconsequences,classificationofawardsasequityorliability,statementofcash flows classification and policy election options for forfeitures.  The Company adopted this new standard as required effective January 1, 2017.  The Company will continue to estimate the number of awards expected to be forfeited and adjust the estimate whenitisnolongerprobablethattheemployeewillfulfilltheservicecondition,aswasrequired under the old standard.  The adoption of this standard did not have a material impact on our consolidated results of operations or financialposition.

InJanuary2017,theFASB issuedanewstandardwhichclarified thedefinitionofabusiness.  Thestandard'sobjectivewasto addadditionalguidancethatassistscompaniesindeterminingwhethertransactionsshouldbeaccountedforasanassetacquisition or a business combination.  The new standard first requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets.  If this threshold is met, the set is not a business.  If this threshold is not met, the entity next evaluates whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs.  Amongotherdifferences,transactioncostsassociatedwithassetacquisitionsarecapitalizedwhilethoseassociatedwithbusiness combinationsareexpensedasincurred.  Inaddition,purchasepriceinanassetacquisitionisallocatedonarelativefairvaluebasis while in a business combination it is generally measured at fair value.  The new standard will be applied prospectively to any transactions occurring within the period of adoption.  The Company early adopted the new standard as allowed effective January 1, 2017.  The Company anticipates that substantially all of its transactions will now be accounted for as asset acquisitions, which means transaction costs will largely be capitalized as noted above.  

Other

The Company is the controlling partner in various consolidated partnerships owning 17 properties and 3,215 apartment units having a noncontrolling interest book value of $6.2 million at September 30, 2017.  The Company is required to make certain disclosures regarding noncontrolling interests in consolidated limited-life subsidiaries.  Of the consolidated entities described above, the Company is the controlling partner in limited-life partnerships owning four properties having a noncontrolling interest deficit balance of $7.3 million.  These four partnership agreements contain provisions that require the partnerships to be liquidated through the sale of their assets upon reaching a date specified in each respective partnership agreement.  The Company, as controlling partner, has an obligation to cause the property owning partnerships to distribute the proceeds of liquidation to the Noncontrolling Interests in these Partially Owned Properties only to the extent that the net proceeds received by the partnerships from the sale of their assets warrant a distribution based on the partnership agreements.  As of September 30, 2017, the Company estimates the value of Noncontrolling Interest distributions for these four properties would have been approximately $65.8 million (“Settlement Value”) had the partnerships been liquidated.  This Settlement Value is based on estimated third party consideration realized by the partnerships upon disposition of the four Partially Owned Properties and is net of all other assets and liabilities, including yield maintenance on the mortgages encumbering the properties, that would have been due on September 30, 2017 had those mortgages been prepaid.  Due to, among other things, the inherent uncertainty in the sale of real estate assets, the amount of any potential distribution to the Noncontrolling Interests in the Company's Partially Owned Properties is subject to change.  To the extent that the partnerships' underlying assets are worth less than the underlying liabilities, the Company has no obligation to remit any consideration to the Noncontrolling Interests in these Partially Owned Properties.

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Equity, Capital and Other Interests

9 Months Ended

Sep. 30, 2017

Equity Capital And Other Interests [Abstract]

Equity, Capital and Other Interests

3. Equity, Capital and OtherInterests

Equity and Redeemable Noncontrolling Interests of Equity Residential

The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and restricted units) for the nine months ended September 30, 2017:

	2017
Common Shares
Common Shares outstanding at January 1,		365,870,924
Common Shares Issued:
Conversion of OP Units		1,107,735
Exercise of share options		343,527
Employee Share Purchase Plan (ESPP)		54,843
Restricted share grants, net		85,451
Common Shares Outstanding at September 30,		367,462,480
Units
Units outstanding at January 1,		14,626,075
Restricted unit grants, net		291,647
Conversion of OP Units to Common Shares		(1,107,735	)
Units outstanding at September 30,		13,809,987
Total Common Shares and Units outstanding at September 30,		381,272,467
Units Ownership Interest in Operating Partnership		3.6	%

The equity positions of various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units, as well as the equity positions of the holders of restricted units, are collectively referred to as the “Noncontrolling Interests – Operating Partnership”.  Subject to certain exceptions (including the “book-up” requirements of restricted units), the Noncontrolling Interests – Operating Partnership may exchange their Units with EQR for Common Shares on a one-for-one basis.  The carrying value of the Noncontrolling Interests – Operating Partnership (including redeemable interests) is allocated based on the number of Noncontrolling Interests – Operating Partnership Units in total in proportion to the number of Noncontrolling Interests – Operating Partnership Units in total plus the number of Common Shares.  Net income is allocated to the Noncontrolling Interests – Operating Partnership based on the weighted average ownership percentage during the period.

The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Noncontrolling Interests – Operating Partnership Units requesting an exchange of their OP Units with EQR.  Once the Operating Partnership elects not to redeem the Noncontrolling Interests – Operating Partnership Units for cash, EQR is obligated to deliver Common Shares to the exchanging holder of the Noncontrolling Interests – Operating Partnership Units.

TheNoncontrollingInterests–OperatingPartnershipUnitsareclassifiedaseithermezzanineequityorpermanentequity.  If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Noncontrolling Interests – Operating Partnership are differentiated and referred to as “Redeemable Noncontrolling Interests – Operating Partnership”.  Instruments that require settlement in registered shares cannot be classified in permanent equity as it is not always completely within an issuer’s control to deliver registered shares.  Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet.  The Redeemable Noncontrolling Interests – Operating Partnership are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period.  EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Noncontrolling Interests – Operating Partnership Units that are classified in permanent equity at September 30, 2017 and December 31, 2016.

ThecarryingvalueoftheRedeemableNoncontrollingInterests–OperatingPartnershipisallocatedbasedonthenumber ofRedeemableNoncontrollingInterests–OperatingPartnershipUnitsinproportiontothenumberofNoncontrollingInterests– Operating Partnership Units in total.  Such percentage of the total carrying value of Units which is ascribed to the Redeemable NoncontrollingInterests–OperatingPartnershipisthenadjustedtothegreaterofcarryingvalueorfairmarketvalueasdescribed above.  As of September 30, 2017, the Redeemable Noncontrolling Interests – Operating Partnership have a redemption value of approximately$380.5million,whichrepresentsthevalueofCommonSharesthatwouldbeissuedinexchangefortheRedeemable NoncontrollingInterests–OperatingPartnershipUnits.

ThefollowingtablepresentsthechangesintheredemptionvalueoftheRedeemableNoncontrollingInterests–Operating Partnership for the nine months ended September 30, 2017 (amounts inthousands):

	2017
Balance at January 1,	$	442,092
Change in market value		(29,551	)
Change in carrying value		(32,000	)
Balance at September 30,	$	380,541

Net proceeds from EQR Common Share and Preferred Share (see definition below) offerings are contributed by EQR to ERPOP.  In return for those contributions, EQR receives a number of OP Units in ERPOP equal to the number of Common Shares it has issued in the equity offering (or in the case of a preferred equity offering, a number of preference units in ERPOP equal in number and having the same terms as the Preferred Shares issued in the equity offering).  As a result, the net offering proceeds from Common Shares and Preferred Shares are allocated between shareholders’ equity and Noncontrolling Interests – Operating Partnership to account for the change in their respective percentage ownership of the underlying equity of ERPOP.

TheCompany’sdeclarationoftrustauthorizesittoissueupto100,000,000preferredsharesofbeneficialinterest,$0.01 par value per share (the “Preferred Shares”), with specific rights, preferences and other attributes as the Board of Trustees may determine, which may include preferences, powers and rights that are senior to the rights of holders of the Company’s Common Shares.

ThefollowingtablepresentstheCompany’sissuedandoutstandingPreferredSharesasof September 30, 2017 and December 31, 2016:

				Amounts in thousands
		Annual
	Call	Dividend per		September 30,		December 31,
	Date (1)	Share (2)		2017		2016
Preferred Shares of beneficial interest, $0.01 par value;    100,000,000 shares authorized:
8.29% Series K Cumulative Redeemable Preferred;    liquidation value $50 per share; 745,600 shares issued and    outstanding at September 30, 2017 and December 31, 2016	12/10/26	$	4.145	$	37,280	$	37,280
				$	37,280	$	37,280

(1) On or after the call date, redeemable preferred shares may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any.

(2) Dividends on Preferred Shares are payable quarterly.

Capital and Redeemable Limited Partners of ERP Operating Limited Partnership

The following tables present the changes in the Operating Partnership’s issued and outstanding Units and in the limited partners’ Units for the nine months ended September 30, 2017:

	2017
General and Limited Partner Units
General and Limited Partner Units outstanding at January 1,		380,496,999
Issued to General Partner:
Exercise of EQR share options		343,527
EQR’s Employee Share Purchase Plan (ESPP)		54,843
EQR's restricted share grants, net		85,451
Issued to Limited Partners:
Restricted unit grants, net		291,647
General and Limited Partner Units outstanding at September 30,		381,272,467
Limited Partner Units
Limited Partner Units outstanding at January 1,		14,626,075
Limited Partner restricted unit grants, net		291,647
Conversion of Limited Partner OP Units to EQR Common    Shares		(1,107,735	)
Limited Partner Units outstanding at September 30,		13,809,987
Limited Partner Units Ownership Interest in Operating    Partnership		3.6	%

The Limited Partners of the Operating Partnership as of September 30, 2017 include various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units, as well as the equity positions of the holders of restricted units.  Subject to certain exceptions (including the “book-up” requirements of restricted units), Limited Partners may exchange their Units with EQR for Common Shares on a one-for-one basis.  The carrying value of the Limited Partner Units (including redeemable interests) is allocated based on the number of Limited Partner Units in total in proportion to the number of Limited Partner Units in total plus the number of General Partner Units.  Net income is allocated to the Limited Partner Units based on the weighted average ownership percentage during the period.

The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Limited Partner Units requesting an exchange of their OP Units with EQR.  Once the Operating Partnership elects not to redeem the Limited Partner Units for cash, EQR is obligated to deliver Common Shares to the exchanging limited partner.

The Limited Partner Units are classified as either mezzanine equity or permanent equity.  If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Limited Partner Units are differentiated and referred to as “Redeemable Limited Partner Units”.  Instruments that require settlement in registered shares cannot be classified in permanent equity as it is not always completely within an issuer's control to deliver registered shares.  Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet.  The Redeemable Limited Partner Units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period.  EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Limited Partner Units that are classified in permanent equity at September 30, 2017 and December 31, 2016.

The carrying value of the Redeemable Limited Partner Units is allocated based on the number of Redeemable Limited PartnerUnitsinproportiontothenumberofLimitedPartnerUnitsintotal.  SuchpercentageofthetotalcarryingvalueofLimited Partner Units which is ascribed to the Redeemable Limited Partner Units is then adjusted to the greater of carrying value or fair market value as described above.  As of September 30, 2017, the Redeemable Limited Partner Units have a redemption value of approximately$380.5million,whichrepresentsthevalueofCommonSharesthatwouldbeissuedinexchangefortheRedeemable Limited PartnerUnits.

The following table presents the changes in the redemption value of the Redeemable Limited Partners for the nine months ended September 30, 2017 (amounts in thousands):

	2017
Balance at January 1,	$	442,092
Change in market value		(29,551	)
Change in carrying value		(32,000	)
Balance at September 30,	$	380,541

EQR contributes all net proceeds from its various equity offerings (including proceeds from exercise of options for CommonShares)toERPOP.  Inreturnforthosecontributions,EQRreceivesanumberofOPUnitsinERPOPequaltothenumber ofCommonSharesithasissuedintheequityoffering(orinthecaseofapreferredequityoffering,anumberofpreferenceunits in ERPOP equal in number and having the same terms as the preferred shares issued in the equityoffering).

ThefollowingtablepresentstheOperatingPartnership'sissuedandoutstanding“PreferenceUnits”asofSeptember 30, 2017 and December 31, 2016:

				Amounts in thousands
		Annual
	Call	Dividend Per		September 30,		December 31,
	Date (1)	Unit (2)		2017		2016
Preference Units:
8.29% Series K Cumulative Redeemable Preference Units;    liquidation value $50 per unit; 745,600 units issued and    outstanding at September 30, 2017 and December 31, 2016	12/10/26	$	4.145	$	37,280	$	37,280
				$	37,280	$	37,280

(1) On or after the call date, redeemable preference units may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares.

(2) Dividends on Preference Units are payable quarterly.

Other

In September 2009, the Company announced the establishment of an At-The-Market (“ATM”) share offering program which would allow EQR to sell Common Shares from time to time into the existing trading market at current market prices as wellasthroughnegotiatedtransactions.  PerthetermsofERPOP'spartnershipagreement,EQRcontributesthenetproceedsfrom all equity offerings to the capital of ERPOP in exchange for additional OP Units (on a one-for-one Common Share per OP Unit basis).  The program currently has a maturity of June 2019.  EQR has the authority to issue 13.0 million shares but has not issued any shares under this program since September 2012.

The Company may repurchase up to 13.0 million Common Shares under its share repurchase program.  No shares were repurchased during the nine months ended September 30, 2017 and as a result, EQR has remaining authorization to repurchase up to 13.0 million of its shares under the repurchase program as of September 30, 2017.  

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Real Estate and Lease Intangibles

9 Months Ended

Sep. 30, 2017

Real Estate [Abstract]

Real Estate and Lease Intangibles

4. Real Estate and Lease Intangibles

The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017			December 31, 2016
Land	$	5,985,004		$	5,899,862
Depreciable property:
Buildings and improvements		17,601,348			16,913,430
Furniture, fixtures and equipment		1,500,963			1,346,300
In-Place lease intangibles		469,091			470,849
Projects under development:
Land		61,047			115,876
Construction-in-progress		232,017			521,292
Land held for development:
Land		63,439			84,440
Construction-in-progress		35,634			34,376
Investment in real estate		25,948,543			25,386,425
Accumulated depreciation		(5,849,110	)		(5,360,389	)
Investment in real estate, net	$	20,099,433		$	20,026,036

The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of September 30, 2017 and December 31, 2016 (amounts in thousands):

Description	Balance Sheet Location	September 30, 2017			December 31, 2016
Assets
Ground lease intangibles – below market	Other Assets	$	191,918		$	178,251
Retail lease intangibles – above market	Other Assets		1,260			1,260
Lease intangible assets			193,178			179,511
Accumulated amortization			(21,305	)		(17,972	)
Lease intangible assets, net		$	171,873		$	161,539
Liabilities
Ground lease intangibles – above market	Other Liabilities	$	2,400		$	2,400
Retail lease intangibles – below market	Other Liabilities		5,270			5,270
Lease intangible liabilities			7,670			7,670
Accumulated amortization			(5,113	)		(4,509	)
Lease intangible liabilities, net		$	2,557		$	3,161

The following table provides a summary of the effect of the amortization for above and below market ground and retail lease intangibles ontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months and quarters ended September 30, 2017 and 2016 respectively (amounts in thousands):

		Nine Months Ended						Quarter Ended
		September 30,						September 30,
Description	Income Statement Location	2017			2016			2017			2016
Ground lease intangible amortization	Property and Maintenance	$	(3,253	)	$	(3,241	)	$	(1,092	)	$	(1,080	)
Retail lease intangible amortization	Rental Income		524			675			80			222
Total amortization of above/below     market lease intangibles		$	(2,729	)	$	(2,566	)	$	(1,012	)	$	(858	)

The following table provides a summary of the aggregate amortization for above and below market ground and retail lease intangibles for each of the next five years (amounts in thousands):

	Remaining
	2017			2018			2019			2020			2021			2022
Ground lease intangibles	$	(1,116	)	$	(4,463	)	$	(4,463	)	$	(4,463	)	$	(4,463	)	$	(4,463	)
Retail lease intangibles		16			71			71			71			71			27
Total	$	(1,100	)	$	(4,392	)	$	(4,392	)	$	(4,392	)	$	(4,392	)	$	(4,436	)

During the nine months ended September 30, 2017, the Company acquired the entire equity interest in the following from  unaffiliated parties (purchase price in thousands):

	Properties		Apartment Units		Purchase Price
Rental Properties – Consolidated (1)		4		947	$	468,050
Total		4		947	$	468,050

(1) Purchase price includes an allocation of approximately $68.3 million to land, $386.2 million to depreciable property (inclusive of capitalized closing costs) and $13.7 million to ground lease intangible (included in other assets).  For one of the property acquisitions, the Company owns the building and improvements and leases the land underlying the improvements under a long-term ground lease that expires in 2113. This property is consolidated and reflected as a real estate asset while the ground lease is accounted for as an operating lease.

During the nine months ended September 30, 2017, the Company disposed of the following to unaffiliated parties (sales price in thousands):

	Properties		Apartment Units		Sales Price
Rental Properties – Consolidated		4		1,024	$	319,700
Land Parcels (one)		—		—		33,450
Total		4		1,024	$	353,150

The Company recognized a net gain on sales of real estate properties of approximately $141.8 million and a net gain on sales of land parcels of approximately $19.2 million on the above sales.

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Commitments to Acquire/Dispose of Real Estate

9 Months Ended

Sep. 30, 2017

Commitments To Acquire Dispose Of Real Estate [Abstract]

Commitments to Acquire/Dispose of Real Estate

5. Commitments to Acquire/Dispose of RealEstate

The Company has not entered into any separate agreements to acquire rental properties or land parcels as of October 27, 2017.

The Company has entered into a separate agreement to dispose of the following (sales price in thousands):

	Properties		Apartment Units		Sales Price
Land Parcels (one)		—		—	$	2,700
Total		—		—	$	2,700

The closing of this pending transaction is subject to certain conditions and restrictions, therefore, there can be no assurance that this transaction will be consummated or that the final terms will not differ in material respects from those summarized above.

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Investments in Partially Owned Entities

9 Months Ended

Sep. 30, 2017

Investments In Partially Owned Entities [Abstract]

Investments in Partially Owned Entities

6. Investments in Partially OwnedEntities

TheCompanyhasco-investedinvariouspropertieswithunrelatedthirdpartieswhichareeitherconsolidatedoraccounted for under the equity method of accounting (unconsolidated).  The following tables and information summarize the Company’s investmentsinpartiallyownedentitiesasof September 30, 2017(amountsinthousandsexceptforpropertyandapartmentunitamounts):

	Consolidated			Unconsolidated
	(VIE)			(Non-VIE)			(VIE) (1)			Total
Total properties		17			2			—			2
Total apartment units		3,215			945			—			945
Balance sheet information at 9/30/2017 (at 100%):
ASSETS
Investment in real estate	$	648,839		$	236,630		$	172,995		$	409,625
Accumulated depreciation		(226,607	)		(40,840	)		(48,670	)		(89,510	)
Investment in real estate, net		422,232			195,790			124,325			320,115
Cash and cash equivalents		22,914			7,194			139			7,333
Investments in unconsolidated entities		45,035			—			—			—
Deposits – restricted		385			258			—			258
Other assets		26,246			450			105			555
Total assets	$	516,812		$	203,692		$	124,569		$	328,261
LIABILITIES AND EQUITY/CAPITAL
Mortgage notes payable, net (2)	$	302,037		$	145,424		$	—		$	145,424
Accounts payable & accrued expenses		2,975			2,644			150			2,794
Accrued interest payable		1,024			691			—			691
Other liabilities		453			308			27			335
Security deposits		2,037			488			—			488
Total liabilities		308,526			149,555			177			149,732
Noncontrolling Interests – Partially Owned    Properties/Partners' equity		6,175			54,336			84,682			139,018
Company equity/General and Limited Partners' Capital		202,111			(199	)		39,710			39,511
Total equity/capital		208,286			54,137			124,392			178,529
Total liabilities and equity/capital	$	516,812		$	203,692		$	124,569		$	328,261

	Consolidated			Unconsolidated
	(VIE)			(Non-VIE)			(VIE) (1)			Total
Operating information for the nine months ended 9/30/2017    (at 100%):
Operating revenue	$	69,917		$	20,050		$	3,805		$	23,855
Operating expenses		17,056			6,746			1,573			8,319
Net operating income		52,861			13,304			2,232			15,536
Property management		2,463			584			56			640
General and administrative/other		239			1			127			128
Depreciation		15,569			7,960			4,126			12,086
Operating income (loss)		34,590			4,759			(2,077	)		2,682
Interest and other income		45			—			—			—
Interest:
Expense incurred, net		(9,977	)		(6,217	)		—			(6,217	)
Amortization of deferred financing costs		(203	)		(1	)		—			(1	)
Income (loss) before income and other taxes and (loss)    from investments in unconsolidated entities		24,455			(1,459	)		(2,077	)		(3,536	)
Income and other tax (expense) benefit		(34	)		(13	)		—			(13	)
(Loss) from investments in unconsolidated entities		(1,155	)		—			—			—
Net income (loss)	$	23,266		$	(1,472	)	$	(2,077	)	$	(3,549	)

(1) Includes the Company’s unconsolidated interest in an entity that owns the land underlying our Wisconsin Place apartment property and owns and operates the parking facility.  This entity is excluded from the property and apartment unit count.

(2) All debt is non-recourse to the Company.

Note: The above tables exclude EQR's ownership interest in ERPOP, private equity fund investments, and the Company's interests in unconsolidated joint ventures established in connection with the acquisition of certain real estate related assets from Archstone Enterprise LP ("Archstone").  These ventures owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation, as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries.  The preferred interests had an aggregate liquidation value of $37.4 million at September 30, 2017.  The ventures are owned 60% by the Company.  See below for further discussion.  

Operating Properties

The Company has various equity interests in certain limited partnerships owning 16 properties containing 2,783 apartment units.  Each partnership owns a multifamily property.  The Company is the general partner of these limited partnerships and is responsible for managing the operations and affairs of the partnerships as well as making all decisions regarding the businesses of the partnerships.  The limited partners are not able to exercise substantive kick-out or participating rights.  As a result, the partnerships qualify as VIEs.  The Company has a controlling financial interest in the VIEs and, thus, is the VIEs' primary beneficiary.  The Company has both the power to direct the activities of the VIEs that most significantly impact the VIEs' economic performance as well as the obligation to absorb losses or the right to receive benefits from the VIEs that could potentially be significant to the VIEs.  As a result, the partnerships are required to be consolidated on the Company's financial statements.

The Company has a 75% equity interest in the Wisconsin Place joint venture.  The project contains a mixed-use site located in Chevy Chase, Maryland consisting of residential, retail, office and accessory uses, including underground parking facilities.  The joint venture owns the 432 unit residential component, but has no ownership interest in the retail and office components.  At September 30, 2017, the residential component had a net book value of $167.0 million.  The Company is the managing member and is responsible for conducting all administrative day-to-day matters and affairs of the joint venture as well as implementing all decisions with respect to the joint venture.  The limited partner is not able to exercise substantive kick-out or participating rights.  As a result, the joint venture qualifies as a VIE.  The Company has a controlling financial interest in the VIE and, thus, is the VIE's primary beneficiary.  The Company has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance as well as the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE.  As a result, the entity that owns the residential component is required to be consolidated on the Company's financial statements.

The Wisconsin Place joint venture also retains an unconsolidated interest in an entity that owns the land underlying the entire project and owns and operates the parking facility.  At September 30, 2017, the basis of this investment was $45.0 million.  The joint venture, as a limited partner, does not have substantive kick-out or participating rights in the entity.  As a result, the entity qualifies as a VIE.  The joint venture does not have a controlling financial interest in the VIE and is not the VIE's primary beneficiary.  The joint venture does not have the power to direct the activities of the VIE that most significantly impact the VIE's economic performance or the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE.  As a result, the entity that owns the land and owns and operates the parking facility is unconsolidated and recorded using the equity method of accounting.

The Company has a 20% equity interest in each of the Nexus Sawgrass and Domain joint ventures.  The Nexus Sawgrass joint venture owns a 501 unit apartment property located in Sunrise, Florida and the Company's interest had a basis of $4.4 million at September 30, 2017.  The Domain joint venture owns a 444 unit apartment property located in San Jose, California and the Company's interest had a basis of $8.4 million at September 30, 2017.  Both properties were funded with long-term, non-recourse secured loans from the partner.  The mortgage loan on Nexus Sawgrass has a current unconsolidated outstanding balance of $48.6 million, bears interest at 5.60% and matures January 1, 2021.  The mortgage loan on Domain has a current unconsolidated outstanding balance of $96.8 million, bears interest at 5.75% and matures January 1, 2022.  While the Company is the managing member of both of the joint ventures, the joint venture partner has significant participating rights and has active involvement in and oversight of the operations.  As a result, the entities do not qualify as VIEs.  The Company alone does not have the power to direct the activities of the entities that most significantly impact the entities' economic performance and as a result, the entities are unconsolidated and recorded using the equity method of accounting.

Other

As the sole general partner of ERPOP, EQR has exclusive control of ERPOP's day-to-day management.  The limited partners are not able to exercise substantive kick-out or participating rights.  As a result, ERPOP qualifies as a VIE.  EQR has a controlling financial interest in ERPOP and, thus, is ERPOP's primary beneficiary.  EQR has the power to direct the activities of ERPOP that most significantly impact ERPOP's economic performance as well as the obligation to absorb losses or the right to receive benefits from ERPOP that could potentially be significant to ERPOP.  As a result, ERPOP is required to be consolidated on EQR's financial statements.

The Company agreed to a maximum investment of $5.0 million each for two private equity funds, both of which primarily focus on real estate technology investments.  The Company accounts for both investments under the equity method of accounting.  As of September 30, 2017, the Company’s interest in these investments had a combined basis of $1.6 million.

On February 27, 2013, in connection with the acquisition of Archstone, subsidiaries of the Company entered into three limited liability company agreements (collectively, the “Residual JV”).  The Residual JV owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation.  The Residual JV is owned 60% by the Company and 40% by its joint venture partner.  TheCompany's basis at September 30, 2017 was a net obligation of $0.4 million.  The Residual JV is managed by a Management Committee consisting of two members from each of the Company and its joint venture partner.  Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners.  As a result, the Residual JV does not qualify as a VIE.  The Company alone does not have the power to direct the activities of the Residual JV that most significantly impact the Residual JV's economic performance and as a result, the Residual JV is unconsolidated and recorded using the equity method of accounting.  The Residual JV has sold all of the real estate assets that were acquired as part of the acquisition of Archstone, including all of the German assets, and is in the process of winding down all remaining activities.

On February 27, 2013, in connection with the acquisition of Archstone, a subsidiary of the Company entered into a limited liability company agreement (the “Legacy JV”), through which they assumed obligations of Archstone in the form of preferred interests, some of which are governed by tax protection arrangements.  At September 30, 2017, the remaining preferred interests had an aggregate liquidation value of $37.4 million, our share of which is included in other liabilities in the accompanying consolidated balance sheets.  Obligations of the Legacy JV are borne 60% by the Company and 40% by its joint venture partner.  The Legacy JV is managed by a Management Committee consisting of two members from each of the Company and its joint venture partner.  Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners.  As a result, the Legacy JV does not qualify as a VIE.  The Company alone does not have the power to direct the activities of the Legacy JV that most significantly impact the Legacy JV's economic performance and as a result, the Legacy JV is unconsolidated and recorded using the equity method of accounting.

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Deposits - Restricted and Escrow Deposits - Mortgage

9 Months Ended

Sep. 30, 2017

Deposits Restricted [Abstract]

Deposits - Restricted and Escrow Deposits - Mortgage

7. Deposits – Restricted and Escrow Deposits – Mortgage

The following table presents the Company’s restricted deposits as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017		December 31, 2016
Tax-deferred (1031) exchange proceeds	$	—	$	38,847
Restricted deposits on real estate investments		61		733
Resident security and utility deposits		35,667		37,007
Other		911		359
Totals	$	36,639	$	76,946

The following table presents the Company’s escrow deposits for mortgages as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017		December 31, 2016
Real estate taxes and insurance	$	556	$	2,003
Replacement reserves		7,969		3,428
Mortgage principal reserves/sinking funds		1,595		58,652
Other		852		852
Totals	$	10,972	$	64,935

During the nine months ended September 30, 2017, the Company received approximately $60.5 million from the return of various mortgage principal reserves/sinking funds on certain tax-exempt mortgage bond deals.

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Debt

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Debt

8. Debt

EQRdoesnothaveanyindebtednessasalldebtisincurredbytheOperatingPartnership.  EQRguaranteestheOperating Partnership’srevolvingcreditfacilityuptothemaximumamountandforthefulltermofthefacility.  

Mortgage Notes Payable

As of September 30, 2017, the Company had outstanding mortgage debt of approximately $3.6 billion.  

During the nine months ended September 30, 2017, the Company:

• Repaid $300.0 million of 5.987% mortgage debt held in a Fannie Mae loan pool maturing in 2019 and incurred a prepayment penalty of approximately $10.8 million;

• Repaid $193.4 million of conventional fixed-rate mortgage loans maturing in 2017 through 2048 and incurred a prepayment penalty of approximately $1.5 million; and

• Repaid $8.8 million of scheduled principal repayments on various mortgage debt.

The Company recorded $0.3 million of write-offs of unamortized deferred financing costs during the nine months ended September 30, 2017 as additional interest expense related to debt extinguishment of mortgages.  The Company also recorded $0.7 million of write-offs of net unamortized premiums during the nine months ended September 30, 2017 as a reduction of interest expense related to debt extinguishment of mortgages.

As of September 30, 2017, the Company had $598.7 million of secured debt subject to third party credit enhancement.

Asof September 30, 2017,scheduledmaturitiesfortheCompany’soutstandingmortgageindebtednesswereatvariousdates through May 28, 2061.  At September 30, 2017, the interest rate range on the Company’s mortgage debt was 0.10% to 6.90%.  During the nine months ended September 30, 2017, the weighted average interest rate on the Company’s mortgagedebt was 4.33%.

Notes

As of September 30, 2017, the Company had outstanding unsecured notes of approximately $5.1 billion.

During the nine months ended September 30, 2017, the Company:

• Repaid $394.1 million of 5.75% unsecured notes at maturity;

• Issued $400.0 million of ten-year 3.25% fixed rate public notes, receiving net proceeds of approximately $399.3 million before underwriting fees, hedge termination costs and other expenses, at an all-in effective interest rate of 3.32% after termination of four forward starting swaps in conjunction with the issuance (see Note 9 for further discussion); and

• Issued $300.0 million of thirty-year 4.00% fixed rate public notes, receiving net proceeds of approximately $293.2 million before underwriting fees and other expenses, at an all-in effective interest rate of 4.11%.

Asof September 30, 2017,scheduledmaturitiesfortheCompany’soutstandingnoteswereatvariousdatesthroughAugust 1, 2047.  At September 30, 2017, the interest rate range on the Company’s notes was 2.375% to 7.57%.  During the nine months ended September 30, 2017, the weighted average interest rate on the Company’s notes was 4.41%.

Line of Credit and Commercial Paper

On November 3, 2016, the Company replaced its existing $2.5 billion facility with a $2.0 billion unsecured revolving credit facility maturing January 10, 2022.  The Company has the ability to increase available borrowings by an additional $750.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments.  The interest rate on advances under the facility will generally be LIBOR plus a spread (currently 0.825%), or based on bids received from the lending group, and the Company pays an annual facility fee (currently 12.5 basis points).  Both the spread and the facility fee are dependent on the credit rating of the Company’s long term debt.

OnFebruary2,2015,theCompanyenteredintoanunsecuredcommercialpapernoteprogramintheUnitedStates.  The Company may borrow up to a maximum of $500.0 million under this program subject to market conditions.  The notes will be soldundercustomarytermsintheUnitedStatescommercialpapernotemarketandwillrankparipassuwithalloftheCompany's otherunsecuredseniorindebtedness.  Asof September 30, 2017, there was a balance of$229.8 million outstanding on thecommercialpaperprogram ($230.0 million in principal outstanding net of an unamortized discount of $0.2 million).  Thenotesbearinterest at various floating rates with a weighted average of 1.37% for the nine months ended September 30, 2017 and a weighted average maturity of 18 days as of September 30, 2017.

Asof September 30, 2017,theamountavailableontherevolvingcreditfacilitywas$1.76billion(netof$11.1millionwhich wasrestricted/dedicatedtosupportlettersofcredit and net of $230.0 million in principal outstanding on the commercial paper program).

Other

On April 24, 2017, the Company executed a new letter of credit facility with a third party financial institution which is not backed by or collateralized by borrowings on the Company’s unsecured revolving credit facility.  As of September 30, 2017, there was $9.0 million in letters of credit outstanding on this facility.

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Derivative and Other Fair Value Instruments

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Derivative and Other Fair Value Instruments

9. Derivative and Other Fair ValueInstruments

The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments.  The Company, where possible, bases the fair values of its financial instruments, including its derivative instruments, on listed market prices and third party quotes.  Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments.

In the normal course of business, the Company is exposed to the effect of interest rate changes.  The Company seeks to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments.  The Company may also use derivatives to manage commodity prices in the daily operations of the business.

Athree-levelvaluationhierarchyexistsfordisclosureoffairvaluemeasurements.  Thevaluationhierarchyisbasedupon thetransparencyofinputstothevaluationofanassetorliabilityasofthemeasurementdate.  Afinancialinstrument’scategorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.  The three levels are defined asfollows:

• Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.

• Level 2 – Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

• Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair valuemeasurement.

The Company’s derivative positions are valued using models developed by the respective counterparty as well as models developed internally by the Company that use as their basis readily observable market parameters (such as forward yield curves and credit default swap data).  Employee holdings other than Common Shares within the supplemental executive retirement plan (the “SERP”) are valued using quoted market prices for identical assets and are included in other assets and other liabilities on the consolidated balance sheets.  Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners are valued using the quoted market price of Common Shares.  The fair values disclosed for mortgage notes payable and unsecured debt (including its commercial paper) were calculated using indicative rates provided by lenders of similar loans in the case of mortgage notes payable and the private unsecured debt (including its commercial paper) and quoted market prices for each underlying issuance in the case of the public unsecured notes.

The fair values of the Company’s financial instruments (other than mortgage notes payable, unsecured notes, commercial paper, line of credit and derivative instruments), including cash and cash equivalents and other financial instruments, approximate their carrying or contract value.  Thefollowingtableprovidesasummaryofthe carrying andfairvaluesforthe Company’s mortgage notes payable and unsecured debt (including its commercial paper and line of credit, if applicable) at September 30, 2017 and December 31, 2016, respectively (amounts inthousands):

	September 30, 2017				December 31, 2016
	Estimated Fair Value (Level 2)		Carrying Value		Estimated Fair Value (Level 2)		Carrying Value
Mortgage notes payable, net	$	3,630,477	$	3,619,180	$	4,161,001	$	4,119,181
Unsecured debt, net		5,640,095		5,373,092		5,030,330		4,868,077
Total debt, net	$	9,270,572	$	8,992,272	$	9,191,331	$	8,987,258

ThefollowingtablesummarizestheCompany’sconsolidatedderivativeinstrumentsat September 30, 2017 (dollaramounts are inthousands):

	Fair Value Hedges (1)			Forward Starting Swaps (2)
Current Notional Balance	$	450,000		$	250,000
Lowest Interest Rate		2.375	%		2.1478	%
Highest Interest Rate		2.375	%		2.2895	%
Earliest Maturity Date		2019			2028
Latest Maturity Date		2019			2029

(1) Fair Value Hedges – Converts outstanding fixed rate unsecured notes ($450.0 million 2.375% notes due July 1, 2019) to a floating interest rate of 90-Day LIBOR plus 0.61%.

(2) Forward Starting Swaps – Designed to partially fix interest rates in advance of planned future debt issuances.  Of the $250.0 million notional balance, $200.0 million of these swaps have mandatory counterparty terminations in 2019 and are targeted for 2018 debt issuances while $50.0 million of these swaps have mandatory counterparty terminations in 2020 and are targeted for 2019 debt issuances.

Thefollowingtablesprovideasummaryofthefairvaluemeasurementsforeachmajorcategoryofassetsandliabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at September 30, 2017 and December 31, 2016, respectively (amounts inthousands):

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	9/30/2017		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	444	$	—	$	444	$	—
Forward Starting Swaps	Other Assets		3,921		—		3,921		—
Supplemental Executive Retirement Plan	Other Assets		136,774		136,774		—		—
Total		$	141,139	$	136,774	$	4,365	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	136,774	$	136,774	$	—	$	—
Total		$	136,774	$	136,774	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	380,541	$	—	$	380,541	$	—

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	12/31/2016		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	1,857	$	—	$	1,857	$	—
Supplemental Executive Retirement Plan	Other Assets		124,420		124,420		—		—
Total		$	126,277	$	124,420	$	1,857	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	124,420	$	124,420	$	—	$	—
Total		$	124,420	$	124,420	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	442,092	$	—	$	442,092	$	—

ThefollowingtablesprovideasummaryoftheeffectoffairvaluehedgesontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months ended September 30, 2017 and 2016, respectively (amounts in thousands):

September 30, 2017 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative			Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	(1,413	)	Fixed rate debt	Interest expense	$	1,413
Total		$	(1,413	)			$	1,413

September 30, 2016 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative		Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	4,563	Fixed rate debt	Interest expense	$	(4,563	)
Total		$	4,563			$	(4,563	)

ThefollowingtablesprovideasummaryoftheeffectofcashflowhedgesontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months ended September 30, 2017 and 2016, respectively (amounts in thousands):

	Effective Portion						Ineffective Portion
September 30, 2017 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative		Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	5,216	Interest expense	$	(14,019	)	N/A	$	—
Total	$	5,216		$	(14,019	)		$	—

	Effective Portion							Ineffective Portion
September 30, 2016 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	(4,240	)	Interest expense	$	(37,262	)	N/A	$	—
Total	$	(4,240	)		$	(37,262	)		$	—

Asof September 30, 2017 andDecember 31, 2016,therewereapproximately$94.7millionand$113.9millionindeferred losses, net, included in accumulated other comprehensive (loss), respectively, related to derivative instruments.  Based on the estimatedfairvaluesofthenetderivativeinstrumentsat September 30, 2017,theCompanymayrecognizeanestimated$21.4million of accumulated other comprehensive (loss) as additional interest expense during the twelve months ending September 30,2018.

In August 2017, the Company received $1.3 million to settle four forward starting ten-year swaps in conjunction with the issuance of $400.0 million of ten-year fixed rate public notes.  The entire $1.3 million was initially deferred as a component of accumulated other comprehensive (loss) and will be recognized as a decrease to interest expense over the ten-year term of the notes.

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Earning Per Share and Earnings Per Unit

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Earning Per Share And Earnings Per Unit

10. Earning Per Share and Earnings PerUnit

Equity Residential

Thefollowingtablessetforththecomputationofnetincomepershare–basicandnetincomepershare–dilutedforthe Company (amounts in thousands except per shareamounts):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Numerator for net income per share – basic:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Allocation to Noncontrolling Interests – Operating    Partnership, net		(17,931	)		(160,437	)		(5,166	)		(8,344	)
Net (income) attributable to Noncontrolling    Interests – Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to    Common Shares, net of Noncontrolling Interests		475,694			4,012,476			137,457			207,306
Discontinued operations, net of Noncontrolling Interests		—			119			—			237
Numerator for net income per share – basic	$	475,694		$	4,012,595		$	137,457		$	207,543
Numerator for net income per share – diluted:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Net (income) attributable to Noncontrolling    Interests – Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to Common Shares		493,625			4,172,913			142,623			215,650
Discontinued operations, net		—			124			—			246
Numerator for net income per share – diluted	$	493,625		$	4,173,037		$	142,623		$	215,896
Denominator for net income per share – basic and diluted:
Denominator for net income per share – basic		366,809			364,917			366,996			365,109
Effect of dilutive securities:
OP Units		12,907			13,828			12,910			13,899
Long-term compensation shares/units		2,924			3,539			3,039			3,365
Denominator for net income per share – diluted		382,640			382,284			382,945			382,373
Net income per share – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per share – diluted	$	1.29		$	10.92		$	0.37		$	0.56
Net income per share – basic:
Income from continuing operations available to    Common Shares, net of Noncontrolling Interests	$	1.30		$	11.00		$	0.37		$	0.57
Discontinued operations, net of Noncontrolling Interests		—			—			—			—
Net income per share – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per share – diluted:
Income from continuing operations available to Common Shares	$	1.29		$	10.92		$	0.37		$	0.56
Discontinued operations, net		—			—			—			—
Net income per share – diluted	$	1.29		$	10.92		$	0.37		$	0.56

ERP Operating Limited Partnership

The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Numerator for net income per Unit – basic and diluted:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Net (income) attributable to Noncontrolling Interests – Partially    Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Allocation to Preference Units		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to Units		493,625			4,172,913			142,623			215,650
Discontinued operations, net		—			124			—			246
Numerator for net income per Unit – basic and diluted	$	493,625		$	4,173,037		$	142,623		$	215,896
Denominator for net income per Unit – basic and diluted:
Denominator for net income per Unit – basic		379,716			378,745			379,906			379,008
Effect of dilutive securities:
Dilution for Units issuable upon assumed exercise/vesting    of the Company’s long-term compensation shares/units		2,924			3,539			3,039			3,365
Denominator for net income per Unit – diluted		382,640			382,284			382,945			382,373
Net income per Unit – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per Unit – diluted	$	1.29		$	10.92		$	0.37		$	0.56
Net income per Unit – basic:
Income from continuing operations available to Units	$	1.30		$	11.00		$	0.37		$	0.57
Discontinued operations, net		—			—			—			—
Net income per Unit – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per Unit – diluted:
Income from continuing operations available to Units	$	1.29		$	10.92		$	0.37		$	0.56
Discontinued operations, net		—			—			—			—
Net income per Unit – diluted	$	1.29		$	10.92		$	0.37		$	0.56

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Individually Significant Dispositions

9 Months Ended

Sep. 30, 2017

Discontinued Operations And Disposal Groups [Abstract]

Individually Significant Dispositions

11. IndividuallySignificantDispositions

The Company executed an agreement with controlled affiliates of Starwood Capital Group ("Starwood") on October 23, 2015 to sell a portfolio of 72 operating properties consisting of 23,262 apartment units located in five markets across the United States for $5.365 billion (the "Starwood Transaction" or “Starwood Portfolio”).  The Starwood Portfolio represented substantially all of the assets in the Company’s South Florida and Denver markets and certain suburban assets in the Washington D.C., Seattle and Los Angeles markets.  On January 26 and 27, 2016, the Company closed on the sale of the entire portfolio described above.

The Company concluded that the Starwood Transaction did not qualify for discontinued operations reporting as it did not represent a strategic shift that had a major effect on the Company’s operations and financial results.  The Company has been investing only in its six coastal markets (Boston, New York, Washington D.C., Southern California, San Francisco and Seattle) and has not been acquiring or developing any new assets in its other markets.  Over the past several years, the Company has been repositioning its portfolio by selling its suburban assets located in markets outside its six core coastal markets.  The sale of the Starwood Portfolio represented the continuation of the above strategy.  However, the Company concluded that the Starwood Transaction did qualify as an individually significant component of the Company as the amount received upon disposal exceeded 10% of total assets, and NOI (see definition in Note 13) of the Starwood Portfolio represented approximately 1.6% of consolidated NOI (for the approximate one-month period owned in 2016) for the nine months ended September 30, 2016 and approximately 15.7% of consolidated NOI for the year ended December 31, 2015.  As a result, the following table summarizes the results of operations attributable to the Starwood Transaction for the nine months and quarter ended September 30, 2016 (amounts in thousands):

	Nine Months Ended			Quarter Ended
	September 30, 2016			September 30, 2016
REVENUES
Rental income	$	30,660		$	239
Total revenues		30,660			239
EXPENSES
Property and maintenance		7,839			(84	)
Real estate taxes and insurance		2,933			1
Property management		2			—
General and administrative		19			4
Total expenses		10,793			(79	)
Operating income		19,867			318
Interest and other income		21			10
Interest:
Expense incurred, net		(380	)		(6	)
Amortization of deferred financing costs		(707	)		—
Income and other tax (expense) benefit		(1	)		—
Net gain (loss) on sales of real estate properties		3,161,097			(103	)
Income from operations attributable to controlling    interests – Operating Partnership		3,179,897			219
Income from operations attributable to Noncontrolling    Interests – Operating Partnership		(122,146	)		(8	)
Income from operations attributable to controlling    interests – Company	$	3,057,751		$	211

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2017

Commitments And Contingencies [Abstract]

Commitments and Contingencies

12. Commitments andContingencies

The Company, as an owner of real estate, is subject to various Federal, state and local environmental laws.  Compliance by the Company with existing laws has not had a material adverse effect on the Company.  However, the Company cannot predict the impact of new or changed laws or regulations on its current properties or on properties that it may acquire in the future.  As of September 30, 2017, the Company does have environmental reserves totaling approximately $5.7 million related to two of its properties.

TheCompanyhasestablishedareserverelatedtovariouslitigationmattersassociatedwithitsMassachusettsproperties and periodically assesses the adequacy of the reserve and makes adjustments as necessary.  As of September 30, 2017,the reserve totaled approximately $0.9million.  While no assurances can be given, the Company does not believe that the ultimate resolution of any of these remaining litigation matters, if adversely determined, would have a material adverse effect on the Company.

The Company does not believe there is any other litigation pending or threatened against it that, individually or in the aggregate, may reasonably be expected to have a material adverse effect on the Company.

As of September 30, 2017, the Company has four wholly owned projects totaling 1,285 apartment units in various stages of development with commitments to fund of approximately $127.3 million and estimated completion dates ranging through September 30, 2019, as well as other completed development projects that are in various stages of lease up or are stabilized.

Asof September 30, 2017,theCompanyhastwounconsolidatedoperating properties (Nexus Sawgrass and Domain) that are owned with the same third party joint venture partner.  The joint venture agreementswiththispartnerareprimarilydeal-specificregardingprofit-sharing,equitycontributions,returnsoninvestment,buy-sell agreements and other customary provisions.  Thebuy-sellarrangementscontainprovisionsthatprovide the right, but not the obligation, for the Company to acquire the partner’s interests or sell its interests at any time following the occurrence of certain pre-defined events described in the joint venture agreements.  See Note 6 for further discussion.

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Reportable Segments

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Reportable Segments

13. ReportableSegments

Operating segments are defined as components of an enterprise that engage in business activities from which they may earn revenues and incur expenses and about which discrete financial information is available that is evaluated regularly by the chiefoperatingdecisionmaker.  Thechiefoperatingdecisionmakerdecideshowresourcesareallocatedandassessesperformance on a recurring basis at leastquarterly.

The Company’s primary business is the acquisition, development and management of multifamily residential properties, which includes the generation of rental and other related income through the leasing of apartment units to residents.  The chief operating decision maker evaluates the Company's operating performance geographically by market and both on a same store and non-same store basis.  The Company’s same store operating segments located in its coastal markets represent its reportable segments.  The Company's operating segments located in its other markets (Phoenix) that are not material have also been included in the tables presented below.  

The Company’s fee and asset management and development activities are other business activities that do not constitute an operating segment and as such, have been aggregated in the "Other" category in the tables presented below.

Allrevenuesarefromexternalcustomersandthereisnocustomerwhocontributed10%ormoreoftheCompany’stotal revenues during the nine months and quarters ended September 30, 2017 and 2016, respectively.

The primary financial measure for the Company’s rental real estate segment is net operating income (“NOI”), which representsrentalincomeless:1) propertyandmaintenanceexpenseand2) realestatetaxesandinsuranceexpense(allasreflected in the accompanying consolidated statements of operations and comprehensive income).  TheCompanybelievesthat NOI is helpful to investors as a supplemental measure of its operating performance because it is a direct measure of the actual operating results of the Company’s apartment properties.  Revenues for all leases are reflected on a straight-line basis in accordance with GAAP for the current and comparable periods.

ThefollowingtablepresentsareconciliationofNOIfromourrentalrealestatespecifictocontinuingoperationsforthe nine months and quarters ended September 30, 2017 and 2016, respectively (amounts inthousands):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Rental income	$	1,840,170		$	1,816,960		$	623,951		$	605,856
Property and maintenance expense		(306,645	)		(309,688	)		(104,721	)		(104,216	)
Real estate taxes and insurance expense		(253,318	)		(238,954	)		(84,087	)		(81,343	)
Total operating expenses		(559,963	)		(548,642	)		(188,808	)		(185,559	)
Net operating income	$	1,280,207		$	1,268,318		$	435,143		$	420,297

The following tables present NOI for each segment from our rental real estate specific to continuing operations for the nine months and quarters ended September 30, 2017 and 2016,respectively,aswellastotalassetsandcapitalexpendituresat September 30, 2017(amounts inthousands):

	Nine Months Ended September 30, 2017							Nine Months Ended September 30, 2016
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	296,345	$	83,927	$	212,418		$	285,463	$	83,459	$	202,004
Orange County		66,081		16,355		49,726			63,005		15,529		47,476
San Diego		66,052		17,386		48,666			63,171		16,884		46,287
Subtotal - Southern California		428,478		117,668		310,810			411,639		115,872		295,767
Washington DC		322,307		98,043		224,264			317,879		95,187		222,692
New York		345,656		126,226		219,430			345,434		120,390		225,044
San Francisco		283,654		69,053		214,601			277,666		68,246		209,420
Boston		170,545		47,538		123,007			168,118		47,308		120,810
Seattle		133,279		37,205		96,074			125,910		34,979		90,931
Other Markets		1,384		499		885			1,342		428		914
Total same store		1,685,303		496,232		1,189,071			1,647,988		482,410		1,165,578
Non-same store/other (2) (3)
Non-same store		144,975		53,367		91,608			78,287		29,173		49,114
Other (3)		9,892		10,364		(472	)		90,685		37,059		53,626
Total non-same store/other		154,867		63,731		91,136			168,972		66,232		102,740
Totals	$	1,840,170	$	559,963	$	1,280,207		$	1,816,960	$	548,642	$	1,268,318

(1) For the nine months ended September 30, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,285 apartmentunits.

(2) For the nine months ended September 30, 2017 and 2016, non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1,2016.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operationscriteria.

	Quarter Ended September 30, 2017							Quarter Ended September 30, 2016
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	102,566	$	27,768	$	74,798		$	98,542	$	29,362	$	69,180
Orange County		22,427		5,500		16,927			21,455		5,362		16,093
San Diego		22,432		5,867		16,565			21,516		5,740		15,776
Subtotal - Southern California		147,425		39,135		108,290			141,513		40,464		101,049
New York		125,351		46,219		79,132			124,709		44,223		80,486
Washington DC		108,763		33,459		75,304			107,340		32,817		74,523
San Francisco		98,805		24,875		73,930			97,259		24,487		72,772
Boston		57,071		16,351		40,720			56,368		16,399		39,969
Seattle		49,268		13,647		35,621			46,948		12,493		34,455
Other Markets		459		158		301			457		136		321
Total same store		587,142		173,844		413,298			574,594		171,019		403,575
Non-same store/other (2) (3)
Non-same store		33,974		10,371		23,603			14,128		6,120		8,008
Other (3)		2,835		4,593		(1,758	)		17,134		8,420		8,714
Total non-same store/other		36,809		14,964		21,845			31,262		14,540		16,722
Totals	$	623,951	$	188,808	$	435,143		$	605,856	$	185,559	$	420,297

(1) For the quarters ended September 30, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to July 1, 2016, less properties subsequently sold, which represented 72,049 apartmentunits.

(2) For the quarters ended September 30, 2017 and 2016, non-same store primarily includes properties acquired after July 1, 2016, plus any properties in lease-up and not stabilized as of July 1,2016.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operationscriteria.

	Nine Months Ended September 30,
	Total Assets		Capital Expenditures
Same store (1)
Los Angeles	$	2,620,672	$	18,952
Orange County		330,580		6,671
San Diego		425,241		3,776
Subtotal - Southern California		3,376,493		29,399
Washington DC		3,836,992		26,308
New York		4,181,890		23,547
San Francisco		2,480,069		25,896
Boston		1,670,467		18,906
Seattle		1,172,356		15,499
Other Markets		12,778		83
Total same store		16,731,045		139,638
Non-same store/other (2) (3)
Non-same store		3,080,697		3,206
Other (3)		886,091		414
Total non-same store/other		3,966,788		3,620
Totals	$	20,697,833	$	143,258

(1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,285 apartmentunits.

(2) Non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1,2016.

(3) Other includes development, other corporate operations and capital expenditures for propertiessold.

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Subsequent Events

9 Months Ended

Sep. 30, 2017

Subsequent Events [Abstract]

Subsequent Events

14. SubsequentEvents

Subsequent to September 30, 2017, the Company repaid $103.9 million of 7.125% unsecured notes at maturity.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2017

Summary Of Significant Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X.  Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.  In the opinion of management, all adjustments (consisting of normal recurring accruals) and certain reclassifications considered necessary for a fair presentation have been included.  Certain reclassifications have been made to the prior period financial statements in order to conform to the current year presentation.  These reclassifications did not have an impact on net income previously reported.  Operating results for the nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017.

In preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States, management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from these estimates.

The balance sheets at December 31, 2016 have been derived from the audited financial statements at that date but do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

For further information, including definitions of capitalized terms not defined herein, refer to the consolidated financial statements and footnotes thereto included in the Company’s and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2016.

Income and Other Taxes

Income and Other Taxes

Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level.  In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level.  Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes.  The Company has elected Taxable REIT Subsidiary (“TRS”) status for certain of its corporate subsidiaries and as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses.

Deferred tax assets and liabilities are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases.  These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled.  The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted.  The Company’s deferred tax assets were generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities.  As of September 30, 2017, the Company has elected REIT status for its primary TRS upon filing the 2016 tax return in the third quarter of 2017, with the election retroactive to January 1, 2016.  As a result, the Company wrote-off its deferred tax assets, which were fully reserved, as of September 30, 2017.

Recently Issued and Adopted Accounting Pronouncements

Recently Issued Accounting Pronouncements

InMay2014,theFinancialAccountingStandardsBoard(the"FASB")issuedacomprehensivenewrevenuerecognition standard entitled Revenue from Contracts with Customers that will supersede nearly all existing revenue recognition guidance.  Thenewstandardspecificallyexcludesleaserevenue.  Thenewstandard’scoreprincipleisthatacompanywillrecognizerevenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expectstobeentitledinexchangeforthosegoodsorservices.  Companieswilllikelyneedtousemorejudgmentandmakemore estimatesthanundercurrentrevenuerecognitionguidance.  Thesemayincludeidentifyingperformanceobligationsinthecontract, estimating the amount of variable consideration, if any, to include in the transaction price and allocating the transaction price to each separate performance obligation.  The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect, if any, recognized as of the date of adoption.  The Company anticipates selecting the modified retrospective transition method with a cumulative effect recognized as of the date of adoption and will adoptthenewstandardeffectiveJanuary1,2018, when effective.  TheCompanyiscontinuingtoevaluatethestandard;however,wedonotexpect itsadoptiontohaveasignificantimpactontheconsolidatedfinancialstatements,asapproximately95%oftotalrevenuesconsistof rental income from leasing arrangements, which is specifically excluded from the standard.  In addition, the Company'sfee and assetmanagementactivitiesareimmaterialnowthatitsolditsinterestinJointBaseLewisMcChord in 2016andgiventhenatureofitsdispositiontransactions,thereshouldbenochangesinaccountingunderthenewstandard.

InJanuary2016,theFASBissuedanewstandardwhichrequirescompaniestomeasureallequitysecuritieswithreadily determinablefairvaluesatfairvalueonthebalancesheet,withchangesinfairvaluerecognizedinnetincome.  Thenewstandard will be effective for the Company beginning on January 1, 2018.  The Company does not expect that this will have a material effect on its consolidated results of operations or financialposition.

InFebruary2016,the FASB issued a new leases standard which sets out principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessors and lessees).  The new standard requires the following:

• Lessors – Leases will be accounted for using an approach that is substantially equivalent to existing guidance for operating, sales-type and financing leases, but aligned with the new revenue recognition standard.  Lessors will be required to allocate lease payments to separate lease and non-lease components of each lease agreement, with the non-lease components evaluated under the new revenue recognition standard.

• Lessees – Leases will be accounted for using a dual approach, classifying leases as either operating or finance based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee.  This classification will determine whether the lease expense is recognized on a straight-line basis over the term of the lease (for operating leases) or based on an effective interest method with a front-loaded expense recognition (for finance leases).  A lessee is also required to record a right-of-use asset and a lease liability on its balance sheet for all leases with a term of greater than 12 months regardless of their classification as operating or finance leases.  Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases.

The new standard will be effective for the Company beginning on January 1, 2019, with early adoption permitted, though the Company currently anticipates adopting the new standard on the effective date.  The new standard must be adopted using a modified retrospective method, which requires application of the new guidance at the beginning of the earliest comparative period presented and provides for certain practical expedients, which the Company currently anticipates electing.  The Company anticipates that its residential and retail/commercial leases where it is the lessor will continue to be accounted for as operating leases under the new standard.  Therefore, the Company does not currently anticipate significant changes in the accounting for its lease revenues.  The Company is also the lessee under various corporate office and ground leases, which it will be required to recognize right of use assets and related lease liabilities on its consolidated balance sheets upon adoption.  The Company currently anticipates that its corporate office leases where it is the lessee will continue to be accounted for as operating leases under the new standard.  Based on its anticipated election of the practical expedients, the Company would not be required to reassess the classification of existing ground leases and therefore these leases would continue to be accounted for as operating leases.  However, in the event we modify existing ground leases and/or enter into new ground leases after adoption of the new standard, such leases will likely be classified as finance leases.  The Company will continue to evaluate the impact of adopting the new leases standard on its consolidated results of operations and financial position.

In June 2016, the FASB issued a new standard which requires companies to adopt a new approach for estimating credit losses on certain types of financial instruments, such as trade and other receivables and loans.  The standard will require entities to estimate a lifetime expected credit loss for most financial instruments, including trade receivables.  The new standard will be effective for the Company beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019.  TheCompanyiscurrentlyevaluatingtheimpactofadoptingthenewstandardonitsconsolidatedresultsofoperationsand financial position.

InAugust2016andOctober2016,theFASBissuednewstandardstoclarifyhowspecifictransactionsareclassifiedand presented on the statement of cash flows.  Among other clarifications, the new standards specifically provide guidance for the following items within the statement of cash flows which have required significant judgment in thepast:

• Cash payments related to debt prepayments or extinguishment costs are to be classified within financingactivities;

• The portion of the cash payment made to settle a zero-coupon bond or a bond with an insignificant cash coupon attributable to accreted interest related to a debt discount is to be classified as a cash outflow within operating activities, and the portion attributable to the principal is to be classified within financingactivities;

• Insurance settlement proceeds are to be classified based on the nature of theloss;

• Companies must elect to classify distributions received from equity method investees using either a cumulative earnings approach or a look-through approach and the election must be disclosed;and

• Restrictedcashwillbeincludedwithcashandcashequivalentsonthestatementofcashflows.  Totalcashandcash equivalents and restricted cash are to be reconciled to the related line items on the balancesheet.

Thenewstandardsmustbeappliedretrospectivelytoallperiodspresentedintheconsolidatedfinancialstatementsandtheywill beeffectivefortheCompanybeginningonJanuary1,2018,withearlyadoptionpermitted.  TheCompany currently anticipates adopting the new standards in the fourth quarter of 2017 and plans to continue to apply the look-through approach for distributions received from equity method investees.  The Company does not expect overall cash flows to change; however, there will be material changes between cash flow classifications due to the substantial debt prepayment penalties that the Company has incurred in the comparative period.

InFebruary 2017,theFASB issuedanewstandardwhich clarifies the accounting treatment for partial sales of nonfinancial assets (i.e. real estate).  The standard clarifies that partial sales transactions include contributions of nonfinancial assets to a joint venture or other noncontrolled investee.  Companies must recognize a full gain or loss on transfers of nonfinancial assets to equity method investees.  The standard requires companies to derecognize distinct nonfinancial assets or distinct in substance nonfinancial assets in partial sale transactions when it does not have a controlling financial interest in the legal entity that holds the asset and transfers control of the asset.  Once the distinct nonfinancial asset is transferred, the company is required to measure any non-controlling interest it receives or retains at fair value and recognize a full gain or loss on the transaction.  If a company transfers ownership interests in a consolidated subsidiary and continues to maintain a controlling financial interest, the company does not derecognize the assets or liabilities, and accounts for the transaction as an equity transaction and no gain or loss is recognized. The new standard will be effective for the Company beginning on January 1, 2018 and early adoption was permitted beginning on January 1, 2017.  The Company anticipates adopting the new standard concurrently with the new revenue recognition standard.  The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect recognized as of the date of adoption.  The Company has not had a partial sale of nonfinancial assets in the current or comparative periods.  Therefore, the Company does not currently believe that the adoption of this standard will have a material impact on its consolidated results of operations and financial position.

In August 2017, the FASB issued a final standard which makes changes to the hedge accounting model to enable entities to better portray their risk management activities in the financial statements.  The new standard expands an entity’s ability to hedge nonfinancial and financial risk components, reduces complexity in fair value hedges of interest rate risk and eases certain documentation and assessment requirements.  The new standard also eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of any hedging instrument to be presented in the same income statement line as the hedged instrument.  The new standard will be effective for the Company beginning on January 1, 2019 and early adoption is permitted.  The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position.

Recently Adopted Accounting Pronouncements

InFebruary2015,theFASBissuednewconsolidationguidancewhichmadechangestoboththevariableinterestmodel andthevotingmodel.  Amongotherchanges,thenewstandardspecificallyeliminatedthepresumptioninthecurrentvotingmodel that a general partner controls a limited partnership or similar entity unless that presumption can be overcome.  Generally, only a singlelimitedpartnerthatisabletoexercisesubstantivekick-outrightswillconsolidate.  TheCompanyadoptedthisnewstandard as required effective January 1, 2016.  While adoption of the new standard did not result in any changes to conclusions about whetherajointventurewasconsolidatedorunconsolidated,theCompanyhasdeterminedthatcertainofitsjointventuresandthe OperatingPartnershipwillnowqualifyasvariableinterestentities("VIEs")andthereforewillrequireadditionaldisclosures.  See Note 6 for further discussion.

InMarch2016,theFASBissuedanewstandardwhichsimplifiedseveralaspectsoftheaccountingforemployeeshare-basedpaymenttransactions,includingincometaxconsequences,classificationofawardsasequityorliability,statementofcash flows classification and policy election options for forfeitures.  The Company adopted this new standard as required effective January 1, 2017.  The Company will continue to estimate the number of awards expected to be forfeited and adjust the estimate whenitisnolongerprobablethattheemployeewillfulfilltheservicecondition,aswasrequired under the old standard.  The adoption of this standard did not have a material impact on our consolidated results of operations or financialposition.

InJanuary2017,theFASB issuedanewstandardwhichclarified thedefinitionofabusiness.  Thestandard'sobjectivewasto addadditionalguidancethatassistscompaniesindeterminingwhethertransactionsshouldbeaccountedforasanassetacquisition or a business combination.  The new standard first requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets.  If this threshold is met, the set is not a business.  If this threshold is not met, the entity next evaluates whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs.  Amongotherdifferences,transactioncostsassociatedwithassetacquisitionsarecapitalizedwhilethoseassociatedwithbusiness combinationsareexpensedasincurred.  Inaddition,purchasepriceinanassetacquisitionisallocatedonarelativefairvaluebasis while in a business combination it is generally measured at fair value.  The new standard will be applied prospectively to any transactions occurring within the period of adoption.  The Company early adopted the new standard as allowed effective January 1, 2017.  The Company anticipates that substantially all of its transactions will now be accounted for as asset acquisitions, which means transaction costs will largely be capitalized as noted above.  

Other

Other

The Company is the controlling partner in various consolidated partnerships owning 17 properties and 3,215 apartment units having a noncontrolling interest book value of $6.2 million at September 30, 2017.  The Company is required to make certain disclosures regarding noncontrolling interests in consolidated limited-life subsidiaries.  Of the consolidated entities described above, the Company is the controlling partner in limited-life partnerships owning four properties having a noncontrolling interest deficit balance of $7.3 million.  These four partnership agreements contain provisions that require the partnerships to be liquidated through the sale of their assets upon reaching a date specified in each respective partnership agreement.  The Company, as controlling partner, has an obligation to cause the property owning partnerships to distribute the proceeds of liquidation to the Noncontrolling Interests in these Partially Owned Properties only to the extent that the net proceeds received by the partnerships from the sale of their assets warrant a distribution based on the partnership agreements.  As of September 30, 2017, the Company estimates the value of Noncontrolling Interest distributions for these four properties would have been approximately $65.8 million (“Settlement Value”) had the partnerships been liquidated.  This Settlement Value is based on estimated third party consideration realized by the partnerships upon disposition of the four Partially Owned Properties and is net of all other assets and liabilities, including yield maintenance on the mortgages encumbering the properties, that would have been due on September 30, 2017 had those mortgages been prepaid.  Due to, among other things, the inherent uncertainty in the sale of real estate assets, the amount of any potential distribution to the Noncontrolling Interests in the Company's Partially Owned Properties is subject to change.  To the extent that the partnerships' underlying assets are worth less than the underlying liabilities, the Company has no obligation to remit any consideration to the Noncontrolling Interests in these Partially Owned Properties.

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Business (Tables)

9 Months Ended

Sep. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Ownership Breakdown

The ownership breakdown includes (table does not include various uncompleted development properties):

	Properties		Apartment Units
Wholly Owned Properties		283		73,289
Master-Leased Properties – Consolidated		3		853
Partially Owned Properties – Consolidated		17		3,215
Partially Owned Properties – Unconsolidated		2		945
		305		78,302

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Equity, Capital and Other Interests (Tables)

9 Months Ended

Sep. 30, 2017

Changes in Issued and Outstanding Common Shares and Units

The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and restricted units) for the nine months ended September 30, 2017:

	2017
Common Shares
Common Shares outstanding at January 1,		365,870,924
Common Shares Issued:
Conversion of OP Units		1,107,735
Exercise of share options		343,527
Employee Share Purchase Plan (ESPP)		54,843
Restricted share grants, net		85,451
Common Shares Outstanding at September 30,		367,462,480
Units
Units outstanding at January 1,		14,626,075
Restricted unit grants, net		291,647
Conversion of OP Units to Common Shares		(1,107,735	)
Units outstanding at September 30,		13,809,987
Total Common Shares and Units outstanding at September 30,		381,272,467
Units Ownership Interest in Operating Partnership		3.6	%

Changes in Redemption Value of Redeemable Noncontrolling Interests and Limited Partners Interest

ThefollowingtablepresentsthechangesintheredemptionvalueoftheRedeemableNoncontrollingInterests–Operating Partnership for the nine months ended September 30, 2017 (amounts inthousands):

	2017
Balance at January 1,	$	442,092
Change in market value		(29,551	)
Change in carrying value		(32,000	)
Balance at September 30,	$	380,541

Issued and Outstanding Preferred Shares and Preference Units

ThefollowingtablepresentstheCompany’sissuedandoutstandingPreferredSharesasof September 30, 2017 and December 31, 2016:

				Amounts in thousands
		Annual
	Call	Dividend per		September 30,		December 31,
	Date (1)	Share (2)		2017		2016
Preferred Shares of beneficial interest, $0.01 par value;    100,000,000 shares authorized:
8.29% Series K Cumulative Redeemable Preferred;    liquidation value $50 per share; 745,600 shares issued and    outstanding at September 30, 2017 and December 31, 2016	12/10/26	$	4.145	$	37,280	$	37,280
				$	37,280	$	37,280

(1) On or after the call date, redeemable preferred shares may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any.

(2) Dividends on Preferred Shares are payable quarterly.

ERPOP [Member]

Changes in Issued and Outstanding Common Shares and Units

The following tables present the changes in the Operating Partnership’s issued and outstanding Units and in the limited partners’ Units for the nine months ended September 30, 2017:

	2017
General and Limited Partner Units
General and Limited Partner Units outstanding at January 1,		380,496,999
Issued to General Partner:
Exercise of EQR share options		343,527
EQR’s Employee Share Purchase Plan (ESPP)		54,843
EQR's restricted share grants, net		85,451
Issued to Limited Partners:
Restricted unit grants, net		291,647
General and Limited Partner Units outstanding at September 30,		381,272,467
Limited Partner Units
Limited Partner Units outstanding at January 1,		14,626,075
Limited Partner restricted unit grants, net		291,647
Conversion of Limited Partner OP Units to EQR Common    Shares		(1,107,735	)
Limited Partner Units outstanding at September 30,		13,809,987
Limited Partner Units Ownership Interest in Operating    Partnership		3.6	%

Changes in Redemption Value of Redeemable Noncontrolling Interests and Limited Partners Interest

The following table presents the changes in the redemption value of the Redeemable Limited Partners for the nine months ended September 30, 2017 (amounts in thousands):

	2017
Balance at January 1,	$	442,092
Change in market value		(29,551	)
Change in carrying value		(32,000	)
Balance at September 30,	$	380,541

Issued and Outstanding Preferred Shares and Preference Units

ThefollowingtablepresentstheOperatingPartnership'sissuedandoutstanding“PreferenceUnits”asofSeptember 30, 2017 and December 31, 2016:

				Amounts in thousands
		Annual
	Call	Dividend Per		September 30,		December 31,
	Date (1)	Unit (2)		2017		2016
Preference Units:
8.29% Series K Cumulative Redeemable Preference Units;    liquidation value $50 per unit; 745,600 units issued and    outstanding at September 30, 2017 and December 31, 2016	12/10/26	$	4.145	$	37,280	$	37,280
				$	37,280	$	37,280

(1) On or after the call date, redeemable preference units may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares.

(2) Dividends on Preference Units are payable quarterly.

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Real Estate and Lease Intangibles (Tables)

9 Months Ended

Sep. 30, 2017

Real Estate [Abstract]

Summary of Carrying Amounts of Investment in Real Estate

The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017			December 31, 2016
Land	$	5,985,004		$	5,899,862
Depreciable property:
Buildings and improvements		17,601,348			16,913,430
Furniture, fixtures and equipment		1,500,963			1,346,300
In-Place lease intangibles		469,091			470,849
Projects under development:
Land		61,047			115,876
Construction-in-progress		232,017			521,292
Land held for development:
Land		63,439			84,440
Construction-in-progress		35,634			34,376
Investment in real estate		25,948,543			25,386,425
Accumulated depreciation		(5,849,110	)		(5,360,389	)
Investment in real estate, net	$	20,099,433		$	20,026,036

Summary of Carrying Amounts of Above and Below Market Ground And Retail Lease Intangibles

The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of September 30, 2017 and December 31, 2016 (amounts in thousands):

Description	Balance Sheet Location	September 30, 2017			December 31, 2016
Assets
Ground lease intangibles – below market	Other Assets	$	191,918		$	178,251
Retail lease intangibles – above market	Other Assets		1,260			1,260
Lease intangible assets			193,178			179,511
Accumulated amortization			(21,305	)		(17,972	)
Lease intangible assets, net		$	171,873		$	161,539
Liabilities
Ground lease intangibles – above market	Other Liabilities	$	2,400		$	2,400
Retail lease intangibles – below market	Other Liabilities		5,270			5,270
Lease intangible liabilities			7,670			7,670
Accumulated amortization			(5,113	)		(4,509	)
Lease intangible liabilities, net		$	2,557		$	3,161

Summary of the Effect of the Amortization for Above and Below Market Ground and Retail Lease Intangibles

The following table provides a summary of the effect of the amortization for above and below market ground and retail lease intangibles ontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months and quarters ended September 30, 2017 and 2016 respectively (amounts in thousands):

		Nine Months Ended						Quarter Ended
		September 30,						September 30,
Description	Income Statement Location	2017			2016			2017			2016
Ground lease intangible amortization	Property and Maintenance	$	(3,253	)	$	(3,241	)	$	(1,092	)	$	(1,080	)
Retail lease intangible amortization	Rental Income		524			675			80			222
Total amortization of above/below     market lease intangibles		$	(2,729	)	$	(2,566	)	$	(1,012	)	$	(858	)

Summary of Aggregate Amortization for Above and Below Market Ground And Retail Lease Intangibles

The following table provides a summary of the aggregate amortization for above and below market ground and retail lease intangibles for each of the next five years (amounts in thousands):

	Remaining
	2017			2018			2019			2020			2021			2022
Ground lease intangibles	$	(1,116	)	$	(4,463	)	$	(4,463	)	$	(4,463	)	$	(4,463	)	$	(4,463	)
Retail lease intangibles		16			71			71			71			71			27
Total	$	(1,100	)	$	(4,392	)	$	(4,392	)	$	(4,392	)	$	(4,392	)	$	(4,436	)

Acquired Properties From Unaffiliated Parties

During the nine months ended September 30, 2017, the Company acquired the entire equity interest in the following from  unaffiliated parties (purchase price in thousands):

	Properties		Apartment Units		Purchase Price
Rental Properties – Consolidated (1)		4		947	$	468,050
Total		4		947	$	468,050

(1) Purchase price includes an allocation of approximately $68.3 million to land, $386.2 million to depreciable property (inclusive of capitalized closing costs) and $13.7 million to ground lease intangible (included in other assets).  For one of the property acquisitions, the Company owns the building and improvements and leases the land underlying the improvements under a long-term ground lease that expires in 2113. This property is consolidated and reflected as a real estate asset while the ground lease is accounted for as an operating lease.

Disposed Properties to Unaffiliated Parties

During the nine months ended September 30, 2017, the Company disposed of the following to unaffiliated parties (sales price in thousands):

	Properties		Apartment Units		Sales Price
Rental Properties – Consolidated		4		1,024	$	319,700
Land Parcels (one)		—		—		33,450
Total		4		1,024	$	353,150

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Commitments To Acquire/Dispose of Real Estate (Tables)

9 Months Ended

Sep. 30, 2017

Commitments To Acquire Dispose Of Real Estate [Abstract]

Separate Agreement to Dispose of

The Company has entered into a separate agreement to dispose of the following (sales price in thousands):

	Properties		Apartment Units		Sales Price
Land Parcels (one)		—		—	$	2,700
Total		—		—	$	2,700

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Investments in Partially Owned Entities (Tables)

9 Months Ended

Sep. 30, 2017

Investments In Partially Owned Entities [Abstract]

Partially Owned Property Balance Sheet Schedule

The following tables and information summarize the Company’s investmentsinpartiallyownedentitiesasof September 30, 2017(amountsinthousandsexceptforpropertyandapartmentunitamounts):

	Consolidated			Unconsolidated
	(VIE)			(Non-VIE)			(VIE) (1)			Total
Total properties		17			2			—			2
Total apartment units		3,215			945			—			945
Balance sheet information at 9/30/2017 (at 100%):
ASSETS
Investment in real estate	$	648,839		$	236,630		$	172,995		$	409,625
Accumulated depreciation		(226,607	)		(40,840	)		(48,670	)		(89,510	)
Investment in real estate, net		422,232			195,790			124,325			320,115
Cash and cash equivalents		22,914			7,194			139			7,333
Investments in unconsolidated entities		45,035			—			—			—
Deposits – restricted		385			258			—			258
Other assets		26,246			450			105			555
Total assets	$	516,812		$	203,692		$	124,569		$	328,261
LIABILITIES AND EQUITY/CAPITAL
Mortgage notes payable, net (2)	$	302,037		$	145,424		$	—		$	145,424
Accounts payable & accrued expenses		2,975			2,644			150			2,794
Accrued interest payable		1,024			691			—			691
Other liabilities		453			308			27			335
Security deposits		2,037			488			—			488
Total liabilities		308,526			149,555			177			149,732
Noncontrolling Interests – Partially Owned    Properties/Partners' equity		6,175			54,336			84,682			139,018
Company equity/General and Limited Partners' Capital		202,111			(199	)		39,710			39,511
Total equity/capital		208,286			54,137			124,392			178,529
Total liabilities and equity/capital	$	516,812		$	203,692		$	124,569		$	328,261

Partially Owned Property Income Statement Schedule

	Consolidated			Unconsolidated
	(VIE)			(Non-VIE)			(VIE) (1)			Total
Operating information for the nine months ended 9/30/2017    (at 100%):
Operating revenue	$	69,917		$	20,050		$	3,805		$	23,855
Operating expenses		17,056			6,746			1,573			8,319
Net operating income		52,861			13,304			2,232			15,536
Property management		2,463			584			56			640
General and administrative/other		239			1			127			128
Depreciation		15,569			7,960			4,126			12,086
Operating income (loss)		34,590			4,759			(2,077	)		2,682
Interest and other income		45			—			—			—
Interest:
Expense incurred, net		(9,977	)		(6,217	)		—			(6,217	)
Amortization of deferred financing costs		(203	)		(1	)		—			(1	)
Income (loss) before income and other taxes and (loss)    from investments in unconsolidated entities		24,455			(1,459	)		(2,077	)		(3,536	)
Income and other tax (expense) benefit		(34	)		(13	)		—			(13	)
(Loss) from investments in unconsolidated entities		(1,155	)		—			—			—
Net income (loss)	$	23,266		$	(1,472	)	$	(2,077	)	$	(3,549	)

(1) Includes the Company’s unconsolidated interest in an entity that owns the land underlying our Wisconsin Place apartment property and owns and operates the parking facility.  This entity is excluded from the property and apartment unit count.

(2) All debt is non-recourse to the Company.

Note: The above tables exclude EQR's ownership interest in ERPOP, private equity fund investments, and the Company's interests in unconsolidated joint ventures established in connection with the acquisition of certain real estate related assets from Archstone Enterprise LP ("Archstone").  These ventures owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation, as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries.  The preferred interests had an aggregate liquidation value of $37.4 million at September 30, 2017.  The ventures are owned 60% by the Company.  See below for further discussion.  

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Deposits - Restricted and Escrow Deposits - Mortgage (Tables)

9 Months Ended

Sep. 30, 2017

Deposits Restricted [Abstract]

Restricted Deposits

The following table presents the Company’s restricted deposits as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017		December 31, 2016
Tax-deferred (1031) exchange proceeds	$	—	$	38,847
Restricted deposits on real estate investments		61		733
Resident security and utility deposits		35,667		37,007
Other		911		359
Totals	$	36,639	$	76,946

Escrow Deposits for Mortgages

The following table presents the Company’s escrow deposits for mortgages as of September 30, 2017 and December 31, 2016 (amounts in thousands):

	September 30, 2017		December 31, 2016
Real estate taxes and insurance	$	556	$	2,003
Replacement reserves		7,969		3,428
Mortgage principal reserves/sinking funds		1,595		58,652
Other		852		852
Totals	$	10,972	$	64,935

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Derivative and Other Fair Value Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Summary of Carrying and Fair Values of Financial Instruments

Thefollowingtableprovidesasummaryofthe carrying andfairvaluesforthe Company’s mortgage notes payable and unsecured debt (including its commercial paper and line of credit, if applicable) at September 30, 2017 and December 31, 2016, respectively (amounts inthousands):

	September 30, 2017				December 31, 2016
	Estimated Fair Value (Level 2)		Carrying Value		Estimated Fair Value (Level 2)		Carrying Value
Mortgage notes payable, net	$	3,630,477	$	3,619,180	$	4,161,001	$	4,119,181
Unsecured debt, net		5,640,095		5,373,092		5,030,330		4,868,077
Total debt, net	$	9,270,572	$	8,992,272	$	9,191,331	$	8,987,258

Summary of Consolidated Derivative Instruments

ThefollowingtablesummarizestheCompany’sconsolidatedderivativeinstrumentsat September 30, 2017 (dollaramounts are inthousands):

	Fair Value Hedges (1)			Forward Starting Swaps (2)
Current Notional Balance	$	450,000		$	250,000
Lowest Interest Rate		2.375	%		2.1478	%
Highest Interest Rate		2.375	%		2.2895	%
Earliest Maturity Date		2019			2028
Latest Maturity Date		2019			2029

(1) Fair Value Hedges – Converts outstanding fixed rate unsecured notes ($450.0 million 2.375% notes due July 1, 2019) to a floating interest rate of 90-Day LIBOR plus 0.61%.

(2) Forward Starting Swaps – Designed to partially fix interest rates in advance of planned future debt issuances.  Of the $250.0 million notional balance, $200.0 million of these swaps have mandatory counterparty terminations in 2019 and are targeted for 2018 debt issuances while $50.0 million of these swaps have mandatory counterparty terminations in 2020 and are targeted for 2019 debt issuances.

Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis

Thefollowingtablesprovideasummaryofthefairvaluemeasurementsforeachmajorcategoryofassetsandliabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at September 30, 2017 and December 31, 2016, respectively (amounts inthousands):

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	9/30/2017		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	444	$	—	$	444	$	—
Forward Starting Swaps	Other Assets		3,921		—		3,921		—
Supplemental Executive Retirement Plan	Other Assets		136,774		136,774		—		—
Total		$	141,139	$	136,774	$	4,365	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	136,774	$	136,774	$	—	$	—
Total		$	136,774	$	136,774	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	380,541	$	—	$	380,541	$	—

				Fair Value Measurements at Reporting Date Using
Description	Balance Sheet Location	12/31/2016		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Derivatives designated as hedging    instruments:
Interest Rate Contracts:
Fair Value Hedges	Other Assets	$	1,857	$	—	$	1,857	$	—
Supplemental Executive Retirement Plan	Other Assets		124,420		124,420		—		—
Total		$	126,277	$	124,420	$	1,857	$	—
Liabilities
Supplemental Executive Retirement Plan	Other Liabilities	$	124,420	$	124,420	$	—	$	—
Total		$	124,420	$	124,420	$	—	$	—
Redeemable Noncontrolling Interests –
Operating Partnership/Redeemable
Limited Partners	Mezzanine	$	442,092	$	—	$	442,092	$	—

Summary of Effect of Fair Value Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income

ThefollowingtablesprovideasummaryoftheeffectoffairvaluehedgesontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months ended September 30, 2017 and 2016, respectively (amounts in thousands):

September 30, 2017 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative			Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	(1,413	)	Fixed rate debt	Interest expense	$	1,413
Total		$	(1,413	)			$	1,413

September 30, 2016 Type of Fair Value Hedge	Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative		Hedged Item	Income Statement Location of Hedged Item Gain/(Loss)	Amount of Gain/(Loss) Recognized in Income on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps	Interest expense	$	4,563	Fixed rate debt	Interest expense	$	(4,563	)
Total		$	4,563			$	(4,563	)

Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income

ThefollowingtablesprovideasummaryoftheeffectofcashflowhedgesontheCompany’saccompanyingconsolidated statements of operations and comprehensive income for the nine months ended September 30, 2017 and 2016, respectively (amounts in thousands):

	Effective Portion						Ineffective Portion
September 30, 2017 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative		Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	5,216	Interest expense	$	(14,019	)	N/A	$	—
Total	$	5,216		$	(14,019	)		$	—

	Effective Portion							Ineffective Portion
September 30, 2016 Type of Cash Flow Hedge	Amount of Gain/(Loss) Recognized in OCI on Derivative			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps	$	(4,240	)	Interest expense	$	(37,262	)	N/A	$	—
Total	$	(4,240	)		$	(37,262	)		$	—

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Earning Per Share and Earnings Per Unit (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of Calculation of Numerator and Denominator in Earning Per Share and Earnings Per Unit

Thefollowingtablessetforththecomputationofnetincomepershare–basicandnetincomepershare–dilutedforthe Company (amounts in thousands except per shareamounts):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Numerator for net income per share – basic:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Allocation to Noncontrolling Interests – Operating    Partnership, net		(17,931	)		(160,437	)		(5,166	)		(8,344	)
Net (income) attributable to Noncontrolling    Interests – Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to    Common Shares, net of Noncontrolling Interests		475,694			4,012,476			137,457			207,306
Discontinued operations, net of Noncontrolling Interests		—			119			—			237
Numerator for net income per share – basic	$	475,694		$	4,012,595		$	137,457		$	207,543
Numerator for net income per share – diluted:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Net (income) attributable to Noncontrolling    Interests – Partially Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Preferred distributions		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to Common Shares		493,625			4,172,913			142,623			215,650
Discontinued operations, net		—			124			—			246
Numerator for net income per share – diluted	$	493,625		$	4,173,037		$	142,623		$	215,896
Denominator for net income per share – basic and diluted:
Denominator for net income per share – basic		366,809			364,917			366,996			365,109
Effect of dilutive securities:
OP Units		12,907			13,828			12,910			13,899
Long-term compensation shares/units		2,924			3,539			3,039			3,365
Denominator for net income per share – diluted		382,640			382,284			382,945			382,373
Net income per share – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per share – diluted	$	1.29		$	10.92		$	0.37		$	0.56
Net income per share – basic:
Income from continuing operations available to    Common Shares, net of Noncontrolling Interests	$	1.30		$	11.00		$	0.37		$	0.57
Discontinued operations, net of Noncontrolling Interests		—			—			—			—
Net income per share – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per share – diluted:
Income from continuing operations available to Common Shares	$	1.29		$	10.92		$	0.37		$	0.56
Discontinued operations, net		—			—			—			—
Net income per share – diluted	$	1.29		$	10.92		$	0.37		$	0.56

ERPOP [Member]

Schedule of Calculation of Numerator and Denominator in Earning Per Share and Earnings Per Unit

The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Numerator for net income per Unit – basic and diluted:
Income from continuing operations	$	498,297		$	4,177,599		$	144,196		$	217,246
Net (income) attributable to Noncontrolling Interests – Partially    Owned Properties		(2,354	)		(2,368	)		(801	)		(823	)
Allocation to Preference Units		(2,318	)		(2,318	)		(772	)		(773	)
Income from continuing operations available to Units		493,625			4,172,913			142,623			215,650
Discontinued operations, net		—			124			—			246
Numerator for net income per Unit – basic and diluted	$	493,625		$	4,173,037		$	142,623		$	215,896
Denominator for net income per Unit – basic and diluted:
Denominator for net income per Unit – basic		379,716			378,745			379,906			379,008
Effect of dilutive securities:
Dilution for Units issuable upon assumed exercise/vesting    of the Company’s long-term compensation shares/units		2,924			3,539			3,039			3,365
Denominator for net income per Unit – diluted		382,640			382,284			382,945			382,373
Net income per Unit – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per Unit – diluted	$	1.29		$	10.92		$	0.37		$	0.56
Net income per Unit – basic:
Income from continuing operations available to Units	$	1.30		$	11.00		$	0.37		$	0.57
Discontinued operations, net		—			—			—			—
Net income per Unit – basic	$	1.30		$	11.00		$	0.37		$	0.57
Net income per Unit – diluted:
Income from continuing operations available to Units	$	1.29		$	10.92		$	0.37		$	0.56
Discontinued operations, net		—			—			—			—
Net income per Unit – diluted	$	1.29		$	10.92		$	0.37		$	0.56

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Individually Significant Dispositions (Tables)

9 Months Ended

Sep. 30, 2017

Starwood Portfolio [Member] | Disposal Group, Not Discontinued Operations [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Schedule of Results of Operations Attributable to Starwood Transaction

As a result, the following table summarizes the results of operations attributable to the Starwood Transaction for the nine months and quarter ended September 30, 2016 (amounts in thousands):

	Nine Months Ended			Quarter Ended
	September 30, 2016			September 30, 2016
REVENUES
Rental income	$	30,660		$	239
Total revenues		30,660			239
EXPENSES
Property and maintenance		7,839			(84	)
Real estate taxes and insurance		2,933			1
Property management		2			—
General and administrative		19			4
Total expenses		10,793			(79	)
Operating income		19,867			318
Interest and other income		21			10
Interest:
Expense incurred, net		(380	)		(6	)
Amortization of deferred financing costs		(707	)		—
Income and other tax (expense) benefit		(1	)		—
Net gain (loss) on sales of real estate properties		3,161,097			(103	)
Income from operations attributable to controlling    interests – Operating Partnership		3,179,897			219
Income from operations attributable to Noncontrolling    Interests – Operating Partnership		(122,146	)		(8	)
Income from operations attributable to controlling    interests – Company	$	3,057,751		$	211

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Reportable Segments (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Schedule of Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations

ThefollowingtablepresentsareconciliationofNOIfromourrentalrealestatespecifictocontinuingoperationsforthe nine months and quarters ended September 30, 2017 and 2016, respectively (amounts inthousands):

	Nine Months Ended September 30,						Quarter Ended September 30,
	2017			2016			2017			2016
Rental income	$	1,840,170		$	1,816,960		$	623,951		$	605,856
Property and maintenance expense		(306,645	)		(309,688	)		(104,721	)		(104,216	)
Real estate taxes and insurance expense		(253,318	)		(238,954	)		(84,087	)		(81,343	)
Total operating expenses		(559,963	)		(548,642	)		(188,808	)		(185,559	)
Net operating income	$	1,280,207		$	1,268,318		$	435,143		$	420,297

Schedule of NOI for Each Segment from Rental Real Estate Specific to Continuing Operations

The following tables present NOI for each segment from our rental real estate specific to continuing operations for the nine months and quarters ended September 30, 2017 and 2016,respectively,aswellastotalassetsandcapitalexpendituresat September 30, 2017(amounts inthousands):

	Nine Months Ended September 30, 2017							Nine Months Ended September 30, 2016
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	296,345	$	83,927	$	212,418		$	285,463	$	83,459	$	202,004
Orange County		66,081		16,355		49,726			63,005		15,529		47,476
San Diego		66,052		17,386		48,666			63,171		16,884		46,287
Subtotal - Southern California		428,478		117,668		310,810			411,639		115,872		295,767
Washington DC		322,307		98,043		224,264			317,879		95,187		222,692
New York		345,656		126,226		219,430			345,434		120,390		225,044
San Francisco		283,654		69,053		214,601			277,666		68,246		209,420
Boston		170,545		47,538		123,007			168,118		47,308		120,810
Seattle		133,279		37,205		96,074			125,910		34,979		90,931
Other Markets		1,384		499		885			1,342		428		914
Total same store		1,685,303		496,232		1,189,071			1,647,988		482,410		1,165,578
Non-same store/other (2) (3)
Non-same store		144,975		53,367		91,608			78,287		29,173		49,114
Other (3)		9,892		10,364		(472	)		90,685		37,059		53,626
Total non-same store/other		154,867		63,731		91,136			168,972		66,232		102,740
Totals	$	1,840,170	$	559,963	$	1,280,207		$	1,816,960	$	548,642	$	1,268,318

(1) For the nine months ended September 30, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,285 apartmentunits.

(2) For the nine months ended September 30, 2017 and 2016, non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1,2016.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operationscriteria.

	Quarter Ended September 30, 2017							Quarter Ended September 30, 2016
	Rental Income		Operating Expenses		NOI			Rental Income		Operating Expenses		NOI
Same store (1)
Los Angeles	$	102,566	$	27,768	$	74,798		$	98,542	$	29,362	$	69,180
Orange County		22,427		5,500		16,927			21,455		5,362		16,093
San Diego		22,432		5,867		16,565			21,516		5,740		15,776
Subtotal - Southern California		147,425		39,135		108,290			141,513		40,464		101,049
New York		125,351		46,219		79,132			124,709		44,223		80,486
Washington DC		108,763		33,459		75,304			107,340		32,817		74,523
San Francisco		98,805		24,875		73,930			97,259		24,487		72,772
Boston		57,071		16,351		40,720			56,368		16,399		39,969
Seattle		49,268		13,647		35,621			46,948		12,493		34,455
Other Markets		459		158		301			457		136		321
Total same store		587,142		173,844		413,298			574,594		171,019		403,575
Non-same store/other (2) (3)
Non-same store		33,974		10,371		23,603			14,128		6,120		8,008
Other (3)		2,835		4,593		(1,758	)		17,134		8,420		8,714
Total non-same store/other		36,809		14,964		21,845			31,262		14,540		16,722
Totals	$	623,951	$	188,808	$	435,143		$	605,856	$	185,559	$	420,297

(1) For the quarters ended September 30, 2017 and 2016, same store primarily includes all properties acquired or completed that were stabilized prior to July 1, 2016, less properties subsequently sold, which represented 72,049 apartmentunits.

(2) For the quarters ended September 30, 2017 and 2016, non-same store primarily includes properties acquired after July 1, 2016, plus any properties in lease-up and not stabilized as of July 1,2016.

(3) Other includes development, other corporate operations and operations prior to sale for properties sold from 2014 through 2017 that do not meet the discontinued operationscriteria.

	Nine Months Ended September 30,
	Total Assets		Capital Expenditures
Same store (1)
Los Angeles	$	2,620,672	$	18,952
Orange County		330,580		6,671
San Diego		425,241		3,776
Subtotal - Southern California		3,376,493		29,399
Washington DC		3,836,992		26,308
New York		4,181,890		23,547
San Francisco		2,480,069		25,896
Boston		1,670,467		18,906
Seattle		1,172,356		15,499
Other Markets		12,778		83
Total same store		16,731,045		139,638
Non-same store/other (2) (3)
Non-same store		3,080,697		3,206
Other (3)		886,091		414
Total non-same store/other		3,966,788		3,620
Totals	$	20,697,833	$	143,258

(1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2016, less properties subsequently sold, which represented 70,285 apartmentunits.

(2) Non-same store primarily includes properties acquired after January 1, 2016, plus any properties in lease-up and not stabilized as of January 1,2016.

(3) Other includes development, other corporate operations and capital expenditures for propertiessold.

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Business - Additional Information (Details)	Sep. 30, 2017 State Property ApartmentUnit
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of States in which Entity Operates | State	10
Properties | Property	305
Apartment Units | ApartmentUnit	78,302
ERPOP [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	96.40%

XML

Business - Ownership Breakdown (Details)	Sep. 30, 2017 Property ApartmentUnit
Property/Unit schedule
Properties | Property	305
Apartment Units | ApartmentUnit	78,302
Wholly Owned Properties
Property/Unit schedule
Properties | Property	283
Apartment Units | ApartmentUnit	73,289
Master-Leased Properties – Consolidated
Property/Unit schedule
Properties | Property	3
Apartment Units | ApartmentUnit	853
Partially Owned Properties – Consolidated
Property/Unit schedule
Properties | Property	17
Apartment Units | ApartmentUnit	3,215
Partially Owned Properties – Unconsolidated
Property/Unit schedule
Properties | Property	2
Apartment Units | ApartmentUnit	945

XML

Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2017 USD ($)	Sep. 30, 2017 USD ($) Property ApartmentUnit	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Property ApartmentUnit	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Provision for income tax		$ 228,000	$ 426,000	$ 710,000	$ 1,189,000
Properties | Property		305		305
Apartment Units | ApartmentUnit		78,302		78,302
Partially Owned Properties		$ 6,175,000		$ 6,175,000		$ 10,609,000
Partially Owned Properties – Consolidated
Properties | Property		17		17
Apartment Units | ApartmentUnit		3,215		3,215
Limited Life Partnership Properties [Member]
Properties | Property		4		4
Partially Owned Properties		$ 7,300,000		$ 7,300,000
Noncontrolling Interests Settlement Value		$ 65,800,000		65,800,000
Adjustments for New Accounting Principle, Early Adoption
Gain (loss) on equity transaction	$ 0
Federal [Member]
Provision for income tax				$ 0

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Equity, Capital and Other Interests - Changes in Issued and Outstanding Common Shares and Units (Details)	9 Months Ended
	Sep. 30, 2017 shares
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	365,870,924
Common Shares Issued:
Conversion of OP Units	1,107,735
Exercise of share options	343,527
Employee Share Purchase Plan (ESPP)	54,843
Restricted share grants, net	85,451
Common Stock, Shares, Outstanding	367,462,480
Units
Total Units Outstanding	14,626,075
Restricted unit grants, net	291,647
Conversion of OP Units to Common Shares	(1,107,735)
Total Units Outstanding	13,809,987
Common Shares And Units Outstanding	381,272,467
Units Ownership Interest in Operating Partnership	3.60%

XML

Equity, Capital and Other Interests - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Class Of Stock [Line Items]
Redeemable Noncontrolling Interests – Operating Partnership	$ 380,541	$ 442,092
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
ERPOP [Member]
Class Of Stock [Line Items]
Redeemable Limited Partners	$ 380,541	$ 442,092

XML

Equity, Capital and Other Interests - Changes in Redemption Value of Redeemable Noncontrolling Interests - Operating Partnership (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Equity Capital And Other Interests [Abstract]
Redeemable Noncontrolling Interests – Operating Partnership	$ 442,092
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership	(29,551)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(32,000)
Redeemable Noncontrolling Interests – Operating Partnership	$ 380,541

XML

Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Class Of Stock [Line Items]
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at September 30, 2017 and December 31, 2016	$ 37,280	$ 37,280
ERPOP [Member]
Class Of Stock [Line Items]
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at September 30, 2017 and December 31, 2016	$ 37,280	37,280
Series K Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stocks Preference Units Call Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at September 30, 2017 and December 31, 2016	$ 37,280	37,280
Series K Preferred Stock [Member] | ERPOP [Member]
Class Of Stock [Line Items]
Preferred Stocks Preference Units Call Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at September 30, 2017 and December 31, 2016	$ 37,280	$ 37,280

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Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Parenthetical) (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Class Of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Series K Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stock Preference Units Issued	745,600	745,600
Preferred Stock Preference Units Outstanding	745,600	745,600
Preferred Stock Preference Units Redemption Price Per Share Unit	$ 50	$ 50
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%
Series K Preferred Stock [Member] | ERPOP [Member]
Class Of Stock [Line Items]
Preferred Stock Preference Units Issued	745,600	745,600
Preferred Stock Preference Units Outstanding	745,600	745,600
Preferred Stock Preference Units Redemption Price Per Share Unit	$ 50	$ 50
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%

XML

Equity, Capital and Other Interests - Changes in Operating Partnership's Issued and Outstanding Units (Details)	9 Months Ended
	Sep. 30, 2017 shares
General and Limited Partner Units
Exercise of share options	343,527
Employee Share Purchase Plan (ESPP)	54,843
Restricted share grants, net	85,451
Restricted unit grants, net	291,647
Common Shares And Units Outstanding	381,272,467
LIMITED PARTNERS
Total Units Outstanding	14,626,075
Restricted unit grants, net	291,647
Conversion of Limited Partner OP Units to EQR Common Shares	(1,107,735)
Total Units Outstanding	13,809,987
Units Ownership Interest in Operating Partnership	3.60%
ERPOP [Member]
General and Limited Partner Units
Common Shares And Units Outstanding	380,496,999
Exercise of share options	343,527
Employee Share Purchase Plan (ESPP)	54,843
Restricted share grants, net	85,451
Restricted unit grants, net	291,647
Common Shares And Units Outstanding	381,272,467
LIMITED PARTNERS
Total Units Outstanding	14,626,075
Restricted unit grants, net	291,647
Conversion of Limited Partner OP Units to EQR Common Shares	(1,107,735)
Total Units Outstanding	13,809,987
Units Ownership Interest in Operating Partnership	3.60%

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Equity, Capital and Other Interests - Changes in Redemption Value of Redeemable Limited Partners Interest (Details) - ERPOP [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Redeemable Limited Partners	$ 442,092
Limited Partners Change In Redemption Value	(29,551)
Limited Partners Change In Carrying Value	(32,000)
Redeemable Limited Partners	$ 380,541

XML

Equity, Capital and Other Interests - Other - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017 shares
Equity Capital And Other Interests [Abstract]
Additional Common Shares Authorized	13,000,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	13,000,000
Stock Repurchased and Retired During Period, Shares	0

XML

Real Estate and Lease Intangibles - Summary of Carrying Amounts of Investment in Real Estate (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Land	$ 5,985,004	$ 5,899,862
Depreciable property:
Buildings and improvements	17,601,348	16,913,430
Furniture, fixtures and equipment	1,500,963	1,346,300
In-Place lease intangibles	469,091	470,849
Projects under development:
Construction-in-progress	293,064	637,168
Land held for development:
Land	99,073	118,816
Construction-in-progress	293,064	637,168
Investment in real estate	25,948,543	25,386,425
Accumulated depreciation	(5,849,110)	(5,360,389)
Investment in real estate, net	20,099,433	20,026,036
Projects under development [Member]
Projects under development:
Land	61,047	115,876
Construction-in-progress	232,017	521,292
Land held for development:
Construction-in-progress	232,017	521,292
Land held for development [Member]
Projects under development:
Construction-in-progress	35,634	34,376
Land held for development:
Land	63,439	84,440
Construction-in-progress	$ 35,634	$ 34,376

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Real Estate and Lease Intangibles - Summary of Carrying Amounts of Above and Below Market Ground And Retail Lease Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Other Assets [Member]
Lease intangible assets	$ 193,178	$ 179,511
Finite-Lived Intangible Assets, Accumulated Amortization	(21,305)	(17,972)
Lease intangible assets, net	171,873	161,539
Other Assets [Member] | Ground Lease [Member]
Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross	191,918	178,251
Other Assets [Member] | Retail Lease [Member]
Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross	1,260	1,260
Other Liabilities [Member]
Lease Intangible Liabilities	7,670	7,670
Finite Lived Intangible Liabilities Accumulated Amortization	(5,113)	(4,509)
Lease intangible liabilities, net	2,557	3,161
Other Liabilities [Member] | Ground Lease [Member]
Finite-Lived Intangible Liabilities, Off-market Lease, Unfavorable, Gross	2,400	2,400
Other Liabilities [Member] | Retail Lease [Member]
Finite-Lived Intangible Liabilities, Off-market Lease, Unfavorable, Gross	$ 5,270	$ 5,270

XML

Real Estate and Lease Intangibles - Summary of the Effect of the Amortization for Above and Below Market Ground and Retail Lease Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Total amortization of above/below market lease intangibles	$ (1,012)	$ (858)	$ (2,729)	$ (2,566)
Ground Lease [Member] | Property and Maintenance [Member]
Total amortization of above/below market lease intangibles	(1,092)	(1,080)	(3,253)	(3,241)
Retail Lease [Member] | Rental Income [Member]
Total amortization of above/below market lease intangibles	$ 80	$ 222	$ 524	$ 675

XML

Real Estate and Lease Intangibles - Summary of Aggregate Amortization for Above and Below Market Ground And Retail Lease Intangibles (Details) $ in Thousands	Sep. 30, 2017 USD ($)
Finite-lived intangible assets, amortization expense, remainder of fiscal year 2017	$ (1,100)
Finite-lived intangible assets, amortization expense, year 2018	(4,392)
Finite-lived intangible assets, amortization expense, year 2019	(4,392)
Finite-lived intangible assets, amortization expense, year 2020	(4,392)
Finite-lived intangible assets, amortization expense, year 2021	(4,392)
Finite-lived intangible assets, amortization expense, year 2022	(4,436)
Ground Lease [Member]
Finite-lived intangible assets, amortization expense, remainder of fiscal year 2017	(1,116)
Finite-lived intangible assets, amortization expense, year 2018	(4,463)
Finite-lived intangible assets, amortization expense, year 2019	(4,463)
Finite-lived intangible assets, amortization expense, year 2020	(4,463)
Finite-lived intangible assets, amortization expense, year 2021	(4,463)
Finite-lived intangible assets, amortization expense, year 2022	(4,463)
Retail Lease [Member]
Finite lived intangible assets amortization income, reminder of fiscal year 2017	16
Finite-lived intangible assets; amortization income, year 2018	71
Finite-lived intangible assets; amortization income, year 2019	71
Finite-lived intangible assets; amortization income, year 2020	71
Finite-lived intangible assets; amortization income, year 2021	71
Finite-lived intangible assets; amortization income, year 2022	$ 27

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Real Estate and Lease Intangibles - Real Estate Acquisitions and Dispositions (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) Property ApartmentUnit
Properties acquired | Property	4
Property Units acquired | ApartmentUnit	947
Purchase Price	$ 468,050
Properties disposed | Property	4
Property Units disposed | ApartmentUnit	1,024
Sales Price	$ 353,150
Rental Properties – Consolidated [Member]
Properties acquired | Property	4
Property Units acquired | ApartmentUnit	947
Purchase Price	$ 468,050
Properties disposed | Property	4
Property Units disposed | ApartmentUnit	1,024
Sales Price	$ 319,700
Land [Member]
Purchase Price	68,300
Sales Price	$ 33,450

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Real Estate and Lease Intangibles - Real Estate Acquisitions and Dispositions (Parenthetical) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Purchase Price	$ 468,050
Ground Lease [Member] | Other Assets [Member]
Acquired ground lease intangibles – below market	191,918	$ 178,251
Land [Member]
Purchase Price	68,300
Depreciable Property [Member]
Purchase Price	386,200
Rental Properties – Consolidated [Member]
Purchase Price	$ 468,050
Rental Properties – Consolidated [Member] | Ground Lease [Member]
Lease expiration year	2113
Rental Properties – Consolidated [Member] | Ground Lease [Member] | Other Assets [Member]
Acquired ground lease intangibles – below market	$ 13,700

XML

Real Estate and Lease Intangibles - Acquisitions and Dispositions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Real Estate [Abstract]
Net gain on sales of real estate properties	$ 17,328	$ 90,036	$ 141,761	$ 3,870,871
Net gain (loss) on sales of land parcels		$ 4,037	$ 19,170	$ 15,759

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Commitments to Acquire/Dispose of Real Estate - Separate Agreement to Dispose of (Details) - Subsequent Event [Member] $ in Thousands	Oct. 27, 2017 USD ($)
Property/Unit schedule
Sales Price	$ 2,700
Land [Member]
Property/Unit schedule
Sales Price	$ 2,700

XML

Commitments to Acquire/Dispose of Real Estate - Separate Agreement to Dispose of (Parenthetical) (Details)	Oct. 27, 2017 Land
Subsequent Event [Member] | Land [Member]
Property/Unit schedule
Land Parcels	1

XML

Investments in Partially Owned Entities - Partially Owned Property Balance Sheet Schedule (Details) $ in Thousands	Sep. 30, 2017 USD ($) Property ApartmentUnit	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Partially Owned Property Balance Sheet Schedule
Total properties | Property	305
Total apartment units | ApartmentUnit	78,302
ASSETS
Investment in real estate	$ 25,948,543	$ 25,386,425
Accumulated depreciation	(5,849,110)	(5,360,389)
Investment in real estate, net	20,099,433	20,026,036
Cash and cash equivalents	46,565	77,207	$ 517,586	$ 42,276
Investments in unconsolidated entities	59,029	60,141
Deposits – restricted	36,639	76,946
Other assets	445,195	398,883
Total assets	20,697,833	20,704,148
LIABILITIES AND EQUITY
Mortgage notes payable, net	3,619,180	4,119,181
Accounts payable and accrued expenses	167,984	147,482
Accrued interest payable	72,811	60,946
Other liabilities	332,650	350,466
Security deposits	65,230	62,624
Total liabilities	9,823,516	9,801,072
Partially Owned Properties	6,175	10,609
Total equity	10,493,776	10,460,984
Total liabilities and equity/capital	$ 20,697,833	$ 20,704,148
Unconsolidated Non-VIE
Partially Owned Property Balance Sheet Schedule
Total properties | Property	2
Total apartment units | ApartmentUnit	945
ASSETS
Investment in real estate	$ 236,630
Accumulated depreciation	(40,840)
Investment in real estate, net	195,790
Cash and cash equivalents	7,194
Investments in unconsolidated entities	0
Deposits – restricted	258
Other assets	450
Total assets	203,692
LIABILITIES AND EQUITY
Mortgage notes payable, net	145,424
Accounts payable and accrued expenses	2,644
Accrued interest payable	691
Other liabilities	308
Security deposits	488
Total liabilities	149,555
Partially Owned Properties	54,336
Company equity/General and Limited Partners' Capital	(199)
Total equity	54,137
Total liabilities and equity/capital	$ 203,692
Consolidated VIE
Partially Owned Property Balance Sheet Schedule
Total properties | Property	17
Total apartment units | ApartmentUnit	3,215
ASSETS
Investment in real estate	$ 648,839
Accumulated depreciation	(226,607)
Investment in real estate, net	422,232
Cash and cash equivalents	22,914
Investments in unconsolidated entities	45,035
Deposits – restricted	385
Other assets	26,246
Total assets	516,812
LIABILITIES AND EQUITY
Mortgage notes payable, net	302,037
Accounts payable and accrued expenses	2,975
Accrued interest payable	1,024
Other liabilities	453
Security deposits	2,037
Total liabilities	308,526
Partially Owned Properties	6,175
Company equity/General and Limited Partners' Capital	202,111
Total equity	208,286
Total liabilities and equity/capital	$ 516,812
Unconsolidated VIE
Partially Owned Property Balance Sheet Schedule
Total properties | Property	0
Total apartment units | ApartmentUnit	0
ASSETS
Investment in real estate	$ 172,995
Accumulated depreciation	(48,670)
Investment in real estate, net	124,325
Cash and cash equivalents	139
Investments in unconsolidated entities	0
Deposits – restricted	0
Other assets	105
Total assets	124,569
LIABILITIES AND EQUITY
Mortgage notes payable, net	0
Accounts payable and accrued expenses	150
Accrued interest payable	0
Other liabilities	27
Security deposits	0
Total liabilities	177
Partially Owned Properties	84,682
Company equity/General and Limited Partners' Capital	39,710
Total equity	124,392
Total liabilities and equity/capital	$ 124,569
Partially Owned Properties – Unconsolidated
Partially Owned Property Balance Sheet Schedule
Total properties | Property	2
Total apartment units | ApartmentUnit	945
ASSETS
Investment in real estate	$ 409,625
Accumulated depreciation	(89,510)
Investment in real estate, net	320,115
Cash and cash equivalents	7,333
Investments in unconsolidated entities	0
Deposits – restricted	258
Other assets	555
Total assets	328,261
LIABILITIES AND EQUITY
Mortgage notes payable, net	145,424
Accounts payable and accrued expenses	2,794
Accrued interest payable	691
Other liabilities	335
Security deposits	488
Total liabilities	149,732
Partially Owned Properties	139,018
Company equity/General and Limited Partners' Capital	39,511
Total equity	178,529
Total liabilities and equity/capital	$ 328,261

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Investments in Partially Owned Entities - Partially Owned Property Income Statement Schedule (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Partially Owned Property Income Statement Schedule
Operating revenue	$ 624,122	$ 606,074	$ 1,840,702	$ 1,820,311
Property management	20,861	19,517	64,702	64,003
General and administrative	12,567	12,395	40,366	47,408
Depreciation	184,100	179,230	542,964	528,242
Operating income	217,786	209,373	632,707	632,016
Interest and other income	3,945	5,509	5,708	65,092
Interest:
Expense incurred, net	(91,145)	(86,352)	(288,579)	(386,316)
Amortization of deferred financing costs	(2,064)	(2,261)	(6,447)	(10,000)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	127,494	115,849	340,229	286,312
Income and other tax (expense) benefit	(228)	(426)	(710)	(1,189)
(Loss) from investments in unconsolidated entities	(398)	7,750	(2,153)	5,846
Net income	$ 144,196	$ 217,492	498,297	$ 4,177,723
Unconsolidated Non-VIE
Partially Owned Property Income Statement Schedule
Operating revenue			20,050
Operating expenses			6,746
Net operating income			13,304
Property management			584
General and administrative			1
Depreciation			7,960
Operating income			4,759
Interest and other income			0
Interest:
Expense incurred, net			(6,217)
Amortization of deferred financing costs			(1)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations			(1,459)
Income and other tax (expense) benefit			(13)
(Loss) from investments in unconsolidated entities			0
Net income			(1,472)
Consolidated VIE
Partially Owned Property Income Statement Schedule
Operating revenue			69,917
Operating expenses			17,056
Net operating income			52,861
Property management			2,463
General and administrative			239
Depreciation			15,569
Operating income			34,590
Interest and other income			45
Interest:
Expense incurred, net			(9,977)
Amortization of deferred financing costs			(203)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations			24,455
Income and other tax (expense) benefit			(34)
(Loss) from investments in unconsolidated entities			(1,155)
Net income			23,266
Unconsolidated VIE
Partially Owned Property Income Statement Schedule
Operating revenue			3,805
Operating expenses			1,573
Net operating income			2,232
Property management			56
General and administrative			127
Depreciation			4,126
Operating income			(2,077)
Interest and other income			0
Interest:
Expense incurred, net			0
Amortization of deferred financing costs			0
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations			(2,077)
Income and other tax (expense) benefit			0
(Loss) from investments in unconsolidated entities			0
Net income			(2,077)
Partially Owned Properties – Unconsolidated
Partially Owned Property Income Statement Schedule
Operating revenue			23,855
Operating expenses			8,319
Net operating income			15,536
Property management			640
General and administrative			128
Depreciation			12,086
Operating income			2,682
Interest and other income			0
Interest:
Expense incurred, net			(6,217)
Amortization of deferred financing costs			(1)
Income before income and other taxes, (loss) income from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations			(3,536)
Income and other tax (expense) benefit			(13)
(Loss) from investments in unconsolidated entities			0
Net income			$ (3,549)

XML

Investments in Partially Owned Entities - Partially Owned Property Income Statement Schedule (Parenthetical) (Details) - Unconsolidated Non-VIE $ in Millions	Sep. 30, 2017 USD ($)
Legacy JV [Member]
Liquidation Value Preferred Interests	$ 37.4
PARTIALLY OWNED PROPERTIES
Joint venture ownership percentage owned by company	60.00%
Residual JV [Member]
PARTIALLY OWNED PROPERTIES
Joint venture ownership percentage owned by company	60.00%

XML

Investments in Partially Owned Entities - Operating Properties - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) Property ApartmentUnit	Dec. 31, 2016 USD ($)
Variable Interest Entity [Line Items]
Properties | Property	305
Apartment Units | ApartmentUnit	78,302
Investments in unconsolidated entities	$ 59,029	$ 60,141
Secured Debt	$ 3,619,180	$ 4,119,181
Nexus Sawgrass [Member]
Variable Interest Entity [Line Items]
Apartment Units | ApartmentUnit	501
Investments in unconsolidated entities	$ 4,400
Equity Method Investment, Ownership Percentage	20.00%
Secured Debt	$ 48,600
Debt Instrument, Interest Rate, Stated Percentage	5.60%
Debt Instrument, Maturity Date	Jan. 01, 2021
Consolidated VIE
Variable Interest Entity [Line Items]
Properties | Property	17
Apartment Units | ApartmentUnit	3,215
Investments in unconsolidated entities	$ 45,035
Secured Debt	$ 302,037
Unconsolidated VIE
Variable Interest Entity [Line Items]
Properties | Property	0
Apartment Units | ApartmentUnit	0
Investments in unconsolidated entities	$ 0
Secured Debt	$ 0
Operating Property [Member] | Consolidated VIE
Variable Interest Entity [Line Items]
Properties | Property	16
Apartment Units | ApartmentUnit	2,783
Wisconsin Place [Member] | Consolidated VIE
Variable Interest Entity [Line Items]
Apartment Units | ApartmentUnit	432
Joint venture ownership percentage owned by company	75.00%
Basis of joint venture	$ 167,000
Wisconsin Place [Member] | Unconsolidated VIE
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 45,000
Domain [Member]
Variable Interest Entity [Line Items]
Apartment Units | ApartmentUnit	444
Investments in unconsolidated entities	$ 8,400
Equity Method Investment, Ownership Percentage	20.00%
Secured Debt	$ 96,800
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Debt Instrument, Maturity Date	Jan. 01, 2022

XML

Investments in Partially Owned Entities - Other - Additional Information (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 59,029,000	$ 60,141,000
Unconsolidated Non-VIE
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	0
Unconsolidated Non-VIE | Residual JV [Member]
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 400,000
Joint venture ownership percentage owned by company	60.00%
Joint Venture Partner Ownership Percentage	40.00%
Unconsolidated Non-VIE | Legacy JV [Member]
Variable Interest Entity [Line Items]
Joint venture ownership percentage owned by company	60.00%
Joint Venture Partner Ownership Percentage	40.00%
Liquidation Value Preferred Interests	$ 37,400,000
Private Equity Fund | Capital Commitment
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	1,600,000
Private Equity Fund | Maximum [Member]
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 5,000,000

XML

Deposits Restricted and Escrow Deposits Mortgage - Restricted Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Cash And Cash Equivalents [Abstract]
Tax-deferred (1031) exchange proceeds		$ 38,847
Restricted deposits on real estate investments	$ 61	733
Resident security and utility deposits	35,667	37,007
Other	911	359
Totals	$ 36,639	$ 76,946

XML

Deposits Restricted and Escrow Deposits Mortgage - Escrow Deposits for Mortgages (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Cash And Cash Equivalents [Abstract]
Real estate taxes and insurance	$ 556	$ 2,003
Replacement reserves	7,969	3,428
Mortgage principal reserves/sinking funds	1,595	58,652
Other	852	852
Totals	$ 10,972	$ 64,935

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Deposits - Restricted and Escrow Deposits - Mortgage - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($)
Cash And Cash Equivalents [Abstract]
Proceeds from return of various mortgage principal reserves/sinking funds	$ 60.5

XML

Debt - Mortgage Notes Payable - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Mortgage notes payable	$ 3,619,180	$ 4,119,181
Conventional Mortgage Loan [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	193,400
Prepayment penalty charges	$ 1,500
Debt instrument maturity year, start	2017
Debt instrument maturity year, end	2048
Mortgages [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 8,800
Write off of Deferred Debt Issuance Cost	300
Write off unamortized (premium) discount	$ (700)
Debt Instrument, Maturity Date	May 28, 2061
Weighted Average Mortgage Debt Interest Rate	4.33%
Mortgages [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.10%
Mortgages [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.90%
Credit enhanced debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable	$ 598,700
Fannie Mae Pool 3 [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 300,000
Debt Instrument, Interest Rate, Stated Percentage	5.987%
Debt instrument, maturity year	2019
Prepayment penalty charges	$ 10,800

XML

Debt - Notes - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Unsecured notes	$ 5,143,248,000		$ 4,848,079,000
Repayments of Notes Payable	$ 394,077,000	$ 1,500,000,000
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Aug. 01, 2047
Weighted Average Interest Rate	4.41%
Notes Payable, Other Payables [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.375%
Notes Payable, Other Payables [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.57%
5.75 % Notes [Member]
Debt Instrument [Line Items]
Repayments of Notes Payable	$ 394,100,000
Debt Instrument, Interest Rate, Stated Percentage	5.75%
3.25% Notes [Member]
Debt Instrument [Line Items]
Public Notes, Face Value	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Proceeds from Debt, Net of Issuance Costs	$ 399,300,000
Debt Instrument, Interest Rate, Effective Percentage	3.32%
4.00% Notes [Member]
Debt Instrument [Line Items]
Public Notes, Face Value	$ 300,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Proceeds from Debt, Net of Issuance Costs	$ 293,200,000
Debt Instrument, Interest Rate, Effective Percentage	4.11%

XML

Debt - Line of Credit and Commercial Paper - Additional Information (Details) - USD ($)		9 Months Ended
	Nov. 03, 2016	Sep. 30, 2017	Nov. 02, 2016	Feb. 02, 2015
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility				$ 500,000,000
Commercial Paper, net		$ 229,800,000
commercial paper principal outstanding		230,000,000
Unamortized Discount		$ 200,000
Weighted average interest rate commercial paper		1.37%
Commercial Paper Weighted average days outstanding		18 days
Unsecured Revolving Credit Facility
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	$ 2,000,000,000		$ 2,500,000,000
Debt Instrument, Maturity Date		Jan. 10, 2022
Ability to increase LOC facility	$ 750,000,000
Debt instrument, basis spread on variable rate	0.825%
Percentage points of line of credit facility commitment fee		0.125%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Remaining borrowing capacity		$ 1,760,000,000
Amount restricted/dedicated to support letters of credit		$ 11,100,000

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Debt - Other - Additional Information (Details) $ in Millions	Sep. 30, 2017 USD ($)
Debt Disclosure [Abstract]
Letters of credit outstanding	$ 9.0

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Derivative and Other Fair Value Instruments - Summary of Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	$ 9,270,572	$ 9,191,331
Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	8,992,272	8,987,258
Mortgage Notes Payable, Net [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	3,630,477	4,161,001
Mortgage Notes Payable, Net [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	3,619,180	4,119,181
Unsecured Debt [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	5,640,095	5,030,330
Unsecured Debt [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	$ 5,373,092	$ 4,868,077

XML

Derivative and Other Fair Value Instruments - Summary of Consolidated Derivative Instruments (Details)	9 Months Ended
	Sep. 30, 2017 USD ($)
Fair Value Hedges [Member]
Derivative [Line Items]
Current Notional Balance	$ 450,000,000
Earliest Maturity Date	2019
Latest Maturity Date	2019
Fair Value Hedges [Member] | Lowest [Member]
Derivative [Line Items]
Interest Rate	2.375%
Fair Value Hedges [Member] | Highest [Member]
Derivative [Line Items]
Interest Rate	2.375%
Forward Starting Swaps [Member]
Derivative [Line Items]
Current Notional Balance	$ 250,000,000
Earliest Maturity Date	2028
Latest Maturity Date	2029
Forward Starting Swaps [Member] | Lowest [Member]
Derivative [Line Items]
Interest Rate	2.1478%
Forward Starting Swaps [Member] | Highest [Member]
Derivative [Line Items]
Interest Rate	2.2895%

XML

Derivative and Other Fair Value Instruments - Summary of Consolidated Derivative Instruments (Parenthetical) (Details)	9 Months Ended
	Sep. 30, 2017 USD ($)
Forward Starting Swaps [Member]
Derivative [Line Items]
Current Notional Balance	$ 250,000,000
Forward Starting Swaps Mandatory Counterparty Terminations in 2019 [Member]
Derivative [Line Items]
Current Notional Balance	200,000,000
Forward Starting Swaps Mandatory Counterparty Terminations in 2020 [Member]
Derivative [Line Items]
Current Notional Balance	50,000,000
2.375% Notes [Member]
Derivative [Line Items]
Proceeds from issuance of unsecured debt	$ 450,000,000
Debt instrument, interest rate, stated percentage	2.375%
Debt instrument, maturity date	Jul. 01, 2019
Debt instrument, basis spread on variable rate	0.61%
2.375% Notes [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative [Line Items]
Debt instrument, description of variable rate basis	LIBOR plus 0.61%

XML

Derivative and Other Fair Value Instruments - Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	$ 136,774	$ 124,420
Assets, Fair Value Disclosure	141,139	126,277
Other Liabilities, Fair Value Disclosure	136,774	124,420
Liabilities, Fair Value Disclosure	136,774	124,420
Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners	380,541	442,092
Fair Value Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	444	1,857
Forward Starting Swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	3,921
Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	136,774	124,420
Assets, Fair Value Disclosure	136,774	124,420
Other Liabilities, Fair Value Disclosure	136,774	124,420
Liabilities, Fair Value Disclosure	136,774	124,420
Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	0	0
Fair Value, Inputs, Level 1 [Member] | Forward Starting Swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	0
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	0	0
Assets, Fair Value Disclosure	4,365	1,857
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners	380,541	442,092
Fair Value, Inputs, Level 2 [Member] | Fair Value Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	444	1,857
Fair Value, Inputs, Level 2 [Member] | Forward Starting Swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	3,921
Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	0	0
Assets, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	0	$ 0
Fair Value, Inputs, Level 3 [Member] | Forward Starting Swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 0

XML

Derivative and Other Fair Value Instruments - Summary of Effect of Fair Value Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	$ (1,413)	$ 4,563
Amount of Gain/(Loss) Recognized in Income on Hedged Item	1,413	(4,563)
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	(1,413)	4,563
Amount of Gain/(Loss) Recognized in Income on Hedged Item	$ 1,413	$ (4,563)

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Derivative and Other Fair Value Instruments - Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion - Amount of Gain/(Loss) Recognized in OCI on Derivative	$ 5,216	$ (4,240)
Effective Portion - Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	(14,019)	(37,262)
Ineffective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income	0	0
Forward Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective Portion - Amount of Gain/(Loss) Recognized in OCI on Derivative	5,216	(4,240)
Effective Portion - Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	(14,019)	(37,262)
Ineffective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income	$ 0	$ 0

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Derivative and Other Fair Value Instruments - Additional Information (Details)	1 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2017 USD ($) DerivativeInstrument	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Unrealized gain (loss) on interest rate cash flow hedges, pretax, accumulated other comprehensive income (loss)		$ 94,700,000	$ 113,900,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net		21,400,000
Proceeds from settlement of derivative instruments		$ 1,296,000
Forward Starting Swaps [Member]
Derivative [Line Items]
Proceeds from settlement of derivative instruments	$ 1,300,000
Forward Starting Swaps settled | DerivativeInstrument	4
Public Notes, Face Value	$ 400,000,000
Debt instrument, term	10 years

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Earning Per Share and Earnings Per Unit - Computation of Net Income per Share Basic and Net Income per Share Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 144,196	$ 217,246	$ 498,297	$ 4,177,599
Allocation to Noncontrolling Interests – Operating Partnership, net	(5,166)	(8,344)	(17,931)	(160,437)
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Preferred distributions	(772)	(773)	(2,318)	(2,318)
Income from continuing operations available to Common Shares, net of Noncontrolling Interests	137,457	207,306	475,694	4,012,476
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	237	0	119
Net income available to Common Shares	137,457	207,543	475,694	4,012,595
Income From Continuing Operations Available To Common Shares	142,623	215,650	493,625	4,172,913
Discontinued operations, net	0	246	0	124
Net Income (Loss) Available to Common Stockholders, Diluted	$ 142,623	$ 215,896	$ 493,625	$ 4,173,037
Weighted average Common Shares outstanding	366,996	365,109	366,809	364,917
Dilutive Op Units	12,910	13,899	12,907	13,828
Long-term compensation shares/units	3,039	3,365	2,924	3,539
Weighted average Common Shares outstanding	382,945	382,373	382,640	382,284
Net income available to Common Shares	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Net income available to Common Shares	0.37	0.56	1.29	10.92
Income from continuing operations available to Common Shares	0.37	0.57	1.30	11.00
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	0
Earnings Per Share, Basic	0.37	0.57	1.30	11.00
Income from continuing operations available to Common Shares	0.37	0.56	1.29	10.92
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	0
Earnings Per Share, Diluted	$ 0.37	$ 0.56	$ 1.29	$ 10.92

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Earning Per Share and Earnings Per Unit - Computation of Net Income per Unit Basic and Net Income per Unit Diluted for Operating Partnership (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income (loss) from continuing operations	$ 144,196	$ 217,246	$ 498,297	$ 4,177,599
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Discontinued operations, net	$ 0	$ 246	$ 0	$ 124
Weighted average Common Shares outstanding	382,945	382,373	382,640	382,284
Net income available to Common Shares	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Net income available to Common Shares	0.37	0.56	1.29	10.92
Income from continuing operations available to Common Shares	0.37	0.57	1.30	11.00
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	0
Earnings Per Share, Basic	0.37	0.57	1.30	11.00
Income from continuing operations available to Common Shares	0.37	0.56	1.29	10.92
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	0
Earnings Per Share, Diluted	$ 0.37	$ 0.56	$ 1.29	$ 10.92
ERPOP [Member]
Income (loss) from continuing operations	$ 144,196	$ 217,246	$ 498,297	$ 4,177,599
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(801)	(823)	(2,354)	(2,368)
Allocation to Preference Units	(772)	(773)	(2,318)	(2,318)
Income Loss From Continuing Operations Available To Units	142,623	215,650	493,625	4,172,913
Discontinued operations, net	0	246	0	124
Numerator for net income per Unit – basic and diluted	$ 142,623	$ 215,896	$ 493,625	$ 4,173,037
Weighted Average Limited Partnership and General Partnership Units Outstanding, Basic	379,906	379,008	379,716	378,745
Dilutive Securities Options	3,039	3,365	2,924	3,539
Weighted average Common Shares outstanding	382,945	382,373	382,640	382,284
Net income available to Common Shares	$ 0.37	$ 0.57	$ 1.30	$ 11.00
Net income available to Common Shares	0.37	0.56	1.29	10.92
Income from continuing operations available to Common Shares	0.37	0.57	1.30	11.00
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	0
Earnings Per Share, Basic	0.37	0.57	1.30	11.00
Income from continuing operations available to Common Shares	0.37	0.56	1.29	10.92
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0	0	0
Earnings Per Share, Diluted	$ 0.37	$ 0.56	$ 1.29	$ 10.92

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Individually Significant Dispositions - Additional Information (Details) $ in Thousands		9 Months Ended		12 Months Ended
	Oct. 23, 2015 USD ($) Property	Sep. 30, 2017 USD ($) Property ApartmentUnit	Sep. 30, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposed Properties | Property		4
Disposed Units | ApartmentUnit		1,024
Proceeds From Sale Of Property | $		$ 353,150
Starwood Portfolio [Member] | Disposal Group, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposed Properties | Property	72
Disposed Units	23,262
Proceeds From Sale Of Property | $	$ 5,365,000
Percentage of consolidated NOI			1.60%	15.70%

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Individually Significant Dispositions - Results of Operations Attributable to Starwood Transaction (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
REVENUES
Rental income	$ 623,951	$ 605,856	$ 1,840,170	$ 1,816,960
Total revenues	624,122	606,074	1,840,702	1,820,311
EXPENSES
Property and maintenance	104,721	104,216	306,645	309,688
Real estate taxes and insurance	84,087	81,343	253,318	238,954
Property management	20,861	19,517	64,702	64,003
General and administrative	12,567	12,395	40,366	47,408
Total expenses	406,336	396,701	1,207,995	1,188,295
Operating income	217,786	209,373	632,707	632,016
Interest and other income	3,945	5,509	5,708	65,092
Interest:
Expense incurred, net	(91,145)	(86,352)	(288,579)	(386,316)
Amortization of deferred financing costs	(2,064)	(2,261)	(6,447)	(10,000)
Income and other tax (expense) benefit	(228)	(426)	(710)	(1,189)
Net gain (loss) on sales of real estate properties	17,328	90,036	141,761	3,870,871
Income from operations attributable to Noncontrolling Interests – Operating Partnership	(5,166)	(8,353)	(17,931)	(160,442)
Net income attributable to controlling interests	$ 138,229	208,316	$ 478,012	4,014,913
Starwood Portfolio [Member] | Disposal Group, Not Discontinued Operations [Member]
REVENUES
Rental income		239		30,660
Total revenues		239		30,660
EXPENSES
Property and maintenance		(84)		7,839
Real estate taxes and insurance		1		2,933
Property management		0		2
General and administrative		4		19
Total expenses		(79)		10,793
Operating income		318		19,867
Interest and other income		10		21
Interest:
Expense incurred, net		(6)		(380)
Amortization of deferred financing costs		0		(707)
Income and other tax (expense) benefit		0		(1)
Net gain (loss) on sales of real estate properties		(103)		3,161,097
Income from operations attributable to controlling interests – Operating Partnership		219		3,179,897
Income from operations attributable to Noncontrolling Interests – Operating Partnership		(8)		(122,146)
Net income attributable to controlling interests		$ 211		$ 3,057,751

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Commitments and Contingencies - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($) Property ApartmentUnit
Accrual for Environmental Loss Contingencies | $	$ 5.7
Number of properties with environmental reserves | Property	2
Loss Contingency Accrual | $	$ 0.9
Projects in various stages of development | Property	4
Units in various stages of development | ApartmentUnit	1,285
Consolidated Project Under Development Commitment Fund | $	$ 127.3
Various stages of development with estimated completion dates ranging through September 30, 2017	Sep. 30, 2019
Partially Owned Properties – Unconsolidated
Number Of Unconsolidated Projects | Property	2

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Reportable Segments - Additional Information (Details) - Customer	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Disclosure Of Entitys Reportable Segments [Abstract]
Number of customer contributed 10% or more of total revenue	0	0

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Reportable Segments - Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	$ 623,951	$ 605,856	$ 1,840,170	$ 1,816,960
Property and maintenance expense	(104,721)	(104,216)	(306,645)	(309,688)
Real estate taxes and insurance expense	(84,087)	(81,343)	(253,318)	(238,954)
Operating income	217,786	209,373	632,707	632,016
Same Store, Non-same Store and Other
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	623,951	605,856	1,840,170	1,816,960
Property and maintenance expense	(104,721)	(104,216)	(306,645)	(309,688)
Real estate taxes and insurance expense	(84,087)	(81,343)	(253,318)	(238,954)
Total operating expenses	(188,808)	(185,559)	(559,963)	(548,642)
Operating income	$ 435,143	$ 420,297	$ 1,280,207	$ 1,268,318

XML

Reportable Segments - NOI for Each Segment from Our Rental Real Estate Specific to Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Rental income	$ 623,951	$ 605,856	$ 1,840,170	$ 1,816,960
Operating income	217,786	209,373	632,707	632,016
Total Assets	20,697,833		20,697,833		$ 20,704,148
Capital Expenditures			143,258
Same store
Segment Reporting Information [Line Items]
Rental income	587,142	574,594	1,685,303	1,647,988
Operating expenses	173,844	171,019	496,232	482,410
Operating income	413,298	403,575	1,189,071	1,165,578
Total Assets	16,731,045		16,731,045
Capital Expenditures			139,638
Non-same store/other
Segment Reporting Information [Line Items]
Rental income	36,809	31,262	154,867	168,972
Operating expenses	14,964	14,540	63,731	66,232
Operating income	21,845	16,722	91,136	102,740
Total Assets	3,966,788		3,966,788
Capital Expenditures			3,620
Same Store, Non-same Store and Other
Segment Reporting Information [Line Items]
Rental income	623,951	605,856	1,840,170	1,816,960
Operating expenses	188,808	185,559	559,963	548,642
Operating income	435,143	420,297	1,280,207	1,268,318
Other markets | Same store
Segment Reporting Information [Line Items]
Rental income	459	457	1,384	1,342
Operating expenses	158	136	499	428
Operating income	301	321	885	914
Total Assets	12,778		12,778
Capital Expenditures			83
Los Angeles | Same store
Segment Reporting Information [Line Items]
Rental income	102,566	98,542	296,345	285,463
Operating expenses	27,768	29,362	83,927	83,459
Operating income	74,798	69,180	212,418	202,004
Total Assets	2,620,672		2,620,672
Capital Expenditures			18,952
Orange County | Same store
Segment Reporting Information [Line Items]
Rental income	22,427	21,455	66,081	63,005
Operating expenses	5,500	5,362	16,355	15,529
Operating income	16,927	16,093	49,726	47,476
Total Assets	330,580		330,580
Capital Expenditures			6,671
San Diego | Same store
Segment Reporting Information [Line Items]
Rental income	22,432	21,516	66,052	63,171
Operating expenses	5,867	5,740	17,386	16,884
Operating income	16,565	15,776	48,666	46,287
Total Assets	425,241		425,241
Capital Expenditures			3,776
Subtotal - Southern California | Same store
Segment Reporting Information [Line Items]
Rental income	147,425	141,513	428,478	411,639
Operating expenses	39,135	40,464	117,668	115,872
Operating income	108,290	101,049	310,810	295,767
Total Assets	3,376,493		3,376,493
Capital Expenditures			29,399
Washington DC | Same store
Segment Reporting Information [Line Items]
Rental income	108,763	107,340	322,307	317,879
Operating expenses	33,459	32,817	98,043	95,187
Operating income	75,304	74,523	224,264	222,692
Total Assets	3,836,992		3,836,992
Capital Expenditures			26,308
New York | Same store
Segment Reporting Information [Line Items]
Rental income	125,351	124,709	345,656	345,434
Operating expenses	46,219	44,223	126,226	120,390
Operating income	79,132	80,486	219,430	225,044
Total Assets	4,181,890		4,181,890
Capital Expenditures			23,547
San Francisco | Same store
Segment Reporting Information [Line Items]
Rental income	98,805	97,259	283,654	277,666
Operating expenses	24,875	24,487	69,053	68,246
Operating income	73,930	72,772	214,601	209,420
Total Assets	2,480,069		2,480,069
Capital Expenditures			25,896
Boston | Same store
Segment Reporting Information [Line Items]
Rental income	57,071	56,368	170,545	168,118
Operating expenses	16,351	16,399	47,538	47,308
Operating income	40,720	39,969	123,007	120,810
Total Assets	1,670,467		1,670,467
Capital Expenditures			18,906
Seattle | Same store
Segment Reporting Information [Line Items]
Rental income	49,268	46,948	133,279	125,910
Operating expenses	13,647	12,493	37,205	34,979
Operating income	35,621	34,455	96,074	90,931
Total Assets	1,172,356		1,172,356
Capital Expenditures			15,499
Non-same store | Non-same store/other
Segment Reporting Information [Line Items]
Rental income	33,974	14,128	144,975	78,287
Operating expenses	10,371	6,120	53,367	29,173
Operating income	23,603	8,008	91,608	49,114
Total Assets	3,080,697		3,080,697
Capital Expenditures			3,206
Other | Non-same store/other
Segment Reporting Information [Line Items]
Rental income	2,835	17,134	9,892	90,685
Operating expenses	4,593	8,420	10,364	37,059
Operating income	(1,758)	$ 8,714	(472)	$ 53,626
Total Assets	$ 886,091		886,091
Capital Expenditures			$ 414

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Reportable Segments - NOI for Each Segment from Our Rental Real Estate Specific to Continuing Operations (Parenthetical) (Details) - Property	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Disclosure Of Entitys Reportable Segments [Abstract]
Units in same store properties	72,049	72,049	70,285	70,285

XML

Subsequent Events - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Nov. 01, 2017	Sep. 30, 2017	Sep. 30, 2016
Subsequent Event [Line Items]
Repayments of Notes Payable		$ 394,077	$ 1,500,000
Subsequent Event [Member] | 7.125% Notes [Member] | Unsecured Debt [Member]
Subsequent Event [Line Items]
Repayments of Notes Payable	$ 103,900
Debt Instrument, Interest Rate, Stated Percentage	7.125%