Equity Residential (EQR) 10-Q 29 Jul 22 2022 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 22, 2022
Document Information [Line Items]
Entity Registrant Name	EQUITY RESIDENTIAL
Entity Central Index Key	0000906107
Document Type	10-Q
Document Period End Date	Jun. 30, 2022
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Trading Symbol	EQR
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		376,118,260
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	1-12252
Entity Tax Identification Number	13-3675988
Entity Address, Address Line One	Two North Riverside Plaza
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	474-1300
Entity Incorporation, State or Country Code	MD
Title of 12(b) Security	Common Shares of Beneficial Interest,$0.01 Par Value (Equity Residential)
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
ERPOP [Member]
Document Information [Line Items]
Entity Registrant Name	ERP OPERATING LIMITED PARTNERSHIP
Entity Central Index Key	0000931182
Document Type	10-Q
Document Period End Date	Jun. 30, 2022
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
No Trading Symbol Flag	true
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	0-24920
Entity Tax Identification Number	36-3894853
Entity Address, Address Line One	Two North Riverside Plaza
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	474-1300
Entity Incorporation, State or Country Code	IL
Title of 12(b) Security	7.57% Notes due August 15, 2026(ERP Operating Limited Partnership)
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
ASSETS
Land	$ 5,733,412	$ 5,814,790
Depreciable property	22,443,313	22,370,811
Projects under development	65,161	24,307
Land held for development	59,573	62,998
Investment in real estate	28,301,459	28,272,906
Accumulated depreciation	(8,740,806)	(8,354,282)
Investment in real estate, net	19,560,653	19,918,624
Investments in unconsolidated entities	169,272	127,448
Cash and cash equivalents	45,010	123,832
Restricted deposits	73,641	236,404
Right-of-use assets	468,834	474,713
Other assets	256,935	288,220
Total assets	20,574,345	21,169,241
Liabilities:
Mortgage notes payable, net	1,944,404	2,191,201
Notes, net	5,838,693	5,835,222
Line of credit and commercial paper	184,946	315,030
Accounts payable and accrued expenses	119,402	107,013
Accrued interest payable	69,037	69,510
Lease liabilities	310,513	312,335
Other liabilities	292,205	353,102
Security deposits	69,609	66,141
Distributions payable	242,667	233,502
Total liabilities	9,071,476	9,483,056
Commitments and contingencies
Redeemable Noncontrolling Interests – Operating Partnership	398,188	498,977
Shareholders' equity:
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 745,600 shares issued and outstanding as of June 30, 2022 and December 31, 2021	37,280	37,280
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 376,118,433 shares issued and outstanding as of June 30, 2022 and 375,527,195 shares issued and outstanding as of December 31, 2021	3,761	3,755
Paid in capital	9,229,738	9,121,122
Retained earnings	1,649,960	1,827,063
Accumulated other comprehensive income (loss)	(30,650)	(34,272)
Total shareholders’ equity	10,890,089	10,954,948
Noncontrolling Interests:
Operating Partnership	216,326	214,094
Partially Owned Properties	(1,734)	18,166
Total Noncontrolling Interests	214,592	232,260
Total equity	11,104,681	11,187,208
Total liabilities and equity	$ 20,574,345	$ 21,169,241

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - $ / shares	Jun. 30, 2022	Dec. 31, 2021
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	376,118,433	375,527,195
Common Stock, Shares, Outstanding	376,118,433	375,527,195

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
REVENUES
Rental income	$ 687,030	$ 598,059	$ 1,340,378	$ 1,195,661
EXPENSES
Property and maintenance	116,355	107,746	241,229	224,800
Real estate taxes and insurance	101,850	97,401	202,538	200,871
Property management	26,559	24,455	57,306	50,585
General and administrative	16,423	14,678	33,661	30,061
Depreciation	223,806	200,673	453,767	400,635
Total expenses	484,993	444,953	988,501	906,952
Net gain (loss) on sales of real estate properties	107,897	223,738	107,795	223,695
Operating income	309,934	376,844	459,672	512,404
Interest and other income	596	24,104	4,124	24,320
Other expenses	(2,380)	(3,342)	(5,436)	(7,452)
Interest:
Expense incurred, net	(71,889)	(67,124)	(144,681)	(134,482)
Amortization of deferred financing costs	(2,124)	(1,939)	(4,201)	(4,124)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	234,137	328,543	309,478	390,666
Income and other tax (expense) benefit	(291)	(242)	(573)	(395)
Income (loss) from investments in unconsolidated entities	(1,168)	(261)	(2,429)	(1,872)
Net gain (loss) on sales of land parcels				5
Net income	232,678	328,040	306,476	388,404
Net (income) loss attributable to Noncontrolling Interests:
Operating Partnership	(7,633)	(10,913)	(10,027)	(13,056)
Partially Owned Properties	(944)	(741)	(1,583)	(1,423)
Net income attributable to controlling interests	224,101	316,386	294,866	373,925
Preferred distributions	(773)	(772)	(1,545)	(1,545)
Net income available to Common Shares	$ 223,328	$ 315,614	$ 293,321	$ 372,380
Earnings per share – basic:
Net income available to Common Shares	$ 0.59	$ 0.84	$ 0.78	$ 1
Weighted average Common Shares outstanding	375,769	373,812	375,640	373,050
Earnings per share – diluted:
Net income available to Common Shares	$ 0.59	$ 0.84	$ 0.78	$ 1
Weighted average Common Shares outstanding	389,363	387,820	389,463	387,367

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Comprehensive income:
Net income	$ 232,678	$ 328,040	$ 306,476	$ 388,404
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	(1,259)		(1,259)
Losses reclassified into earnings from other comprehensive income	2,456	2,334	4,881	4,637
Other comprehensive income (loss)	1,197	2,334	3,622	4,637
Comprehensive income	233,875	330,374	310,098	393,041
Comprehensive (income) attributable to Noncontrolling Interests	(8,617)	(11,732)	(11,730)	(14,641)
Comprehensive income attributable to controlling interests	$ 225,258	$ 318,642	$ 298,368	$ 378,400

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 306,476	$ 388,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	453,767	400,635
Amortization of deferred financing costs	4,201	4,124
Amortization of above/below market lease intangibles		(154)
Amortization of discounts and premiums on debt	2,891	2,593
Amortization of deferred settlements on derivative instruments	4,875	4,631
Amortization of right-of-use assets	6,103	7,308
Write-off of pursuit costs	2,515	2,647
(Income) loss from investments in unconsolidated entities	2,429	1,872
Distributions from unconsolidated entities – return on capital	164
Net (gain) loss on sales of real estate properties	(107,795)	(223,695)
Net (gain) loss on sales of land parcels		(5)
Realized (gain) loss on sale of investment securities	(2,064)	(23,432)
Compensation paid with Company Common Shares	18,600	16,077
Changes in assets and liabilities:
(Increase) decrease in other assets	(2,096)	(4,462)
Increase (decrease) in accounts payable and accrued expenses	22,615	6,514
Increase (decrease) in accrued interest payable	(473)	(82)
Increase (decrease) in lease liabilities	(817)	(3,211)
Increase (decrease) in other liabilities	(23,985)	(5,387)
Increase (decrease) in security deposits	3,468	1,748
Net cash provided by operating activities	690,874	576,125
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(113,046)	(281,426)
Investment in real estate – development/other	(55,491)	(125,156)
Capital expenditures to real estate	(83,304)	(66,443)
Non-real estate capital additions	(981)	(1,042)
Interest capitalized for real estate and unconsolidated entities under development	(2,267)	(8,176)
Proceeds from disposition of real estate, net	255,922	406,922
Investments in unconsolidated entities – development/other	(48,577)	(4,491)
Distributions from unconsolidated entities – return of capital	9	4
Purchase of investment securities and other investments	(1,034)	(166,945)
Proceeds from sale of investment securities	3,434	191,398
Net cash provided by (used for) investing activities	(45,335)	(55,355)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(228)	(362)
Mortgage notes payable, net:
Proceeds	14,586	47,759
Lump sum payoffs	(260,874)	(59,880)
Scheduled principal repayments	(2,985)	(3,713)
Line of credit and commercial paper:
Commercial paper proceeds	2,836,037	2,819,940
Commercial paper repayments	(2,966,121)	(2,603,000)
Finance ground lease principal payments	(1,229)	(232)
Proceeds from Employee Share Purchase Plan (ESPP)	2,378	2,667
Proceeds from exercise of options	18,928	39,623
Payment of offering costs	(487)
Other financing activities, net	(31)	(31)
Acquisition of Noncontrolling Interests – Partially Owned Properties	(32,178)
Contributions – Noncontrolling Interests – Partially Owned Properties	603
Contributions – Noncontrolling Interests – Operating Partnership	1
Distributions:
Common Shares	(461,605)	(448,983)
Preferred Shares	(1,545)	(1,545)
Noncontrolling Interests – Operating Partnership	(15,142)	(16,540)
Noncontrolling Interests – Partially Owned Properties	(17,232)	(3,700)
Net cash provided by (used for) financing activities	(887,124)	(227,997)
Net increase (decrease) in cash and cash equivalents and restricted deposits	(241,585)	292,773
Cash and cash equivalents and restricted deposits, beginning of period	360,236	99,728
Cash and cash equivalents and restricted deposits, end of period	118,651	392,501
Cash and cash equivalents	45,010	39,492
Restricted deposits	73,641	353,009
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	136,787	126,742
Net cash paid (received) for income and other taxes	687	888
Amortization of deferred financing costs:
Investment in real estate, net	(253)	(100)
Other assets	1,170	1,169
Mortgage notes payable, net	1,159	1,139
Notes, net	2,125	1,916
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	1,545	1,374
Notes, net	1,346	1,219
Amortization of deferred settlements on derivative instruments:
Other liabilities	(6)	(6)
Accumulated other comprehensive income	4,881	4,637
Write-off of pursuit costs:
Investment in real estate, net	761	2,314
Investments in unconsolidated entities	1,637
Other assets	117	317
Accounts payable and accrued expenses		16
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	1,797	1,216
Other liabilities	632	656
Realized/unrealized (gain) loss on derivative instruments:
Other liabilities	1,259
Accumulated other comprehensive income	(1,259)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(675)	(8,176)
Investments in unconsolidated entities	(1,592)
Investments in unconsolidated entities – other:
Investments in unconsolidated entities	(47,887)	(3,231)
Other liabilities	(690)	(1,260)
Debt financing costs:
Other assets		(44)
Mortgage notes payable, net	(228)	(318)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	(224)	11,308
Lease liabilities	224	(11,308)
Non-cash share distribution and other transfers from unconsolidated entities:
Investments in unconsolidated entities	4,048	1,429
Other assets	$ (4,048)	$ (1,429)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	PREFERRED SHARES	COMMON SHARES, $0.01 PAR VALUE	PAID IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	DISTRIBUTIONS	OPERATING PARTNERSHIP	PARTIALLY OWNED PROPERTIES
Balance, beginning of year at Dec. 31, 2020		$ 37,280	$ 3,723	$ 9,128,599	$ 1,399,715	$ (43,666)
Balance, beginning of year at Dec. 31, 2020								$ 233,162	$ 4,673
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			11	66,649
Exercise of share options			8	39,615
Employee Share Purchase Plan (ESPP)			1	2,666
Share-based employee compensation expense:
Issuance of restricted units/shares			1	4,813
Share options				1,976
ESPP discount				633
Supplemental Executive Retirement Plan (SERP)				(2,057)
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership	$ 101,966			(101,966)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				(30,807)				30,807
PAID IN CAPITAL
Conversion of OP Units into Common Shares			11	66,649
Exercise of share options			8	39,615
Employee Share Purchase Plan (ESPP)			1	2,666
RETAINED EARNINGS
Net income attributable to controlling interests	373,925				373,925
Common Share distributions					(450,220)
Preferred Share distributions					(1,545)
Accumulated other comprehensive income (loss) - derivative instruments:
Losses reclassified into earnings from other comprehensive income	(4,637)					4,637
DISTRIBUTIONS
Distributions declared per Common Share outstanding							$ 1.205
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			1	4,813
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(66,660)
Equity compensation associated with Noncontrolling Interests								10,531
Net income attributable to Noncontrolling Interests	13,056							13,056	1,423
Distributions to Noncontrolling Interests								(15,999)	(3,731)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(794)							794
Adjustment for Noncontrolling Interests ownership in Operating Partnership				(30,807)				30,807
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	13,056							13,056	1,423
Distributions to Noncontrolling Interests								(15,999)	(3,731)
Balance, end of period at Jun. 30, 2021		37,280	3,744	9,110,121	1,321,875	(39,029)
Balance, end of period at Jun. 30, 2021								205,691	2,365
Balance, beginning of year at Mar. 31, 2021		37,280	3,729	9,083,346	1,231,808	(41,363)
Balance, beginning of year at Mar. 31, 2021								234,969	2,472
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			11	66,649
Exercise of share options			3	16,738
Employee Share Purchase Plan (ESPP)			1	935
Share-based employee compensation expense:
Issuance of restricted units/shares				2,540
Share options				988
ESPP discount				189
Supplemental Executive Retirement Plan (SERP)				(828)
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership				(29,010)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				(31,426)				31,426
PAID IN CAPITAL
Conversion of OP Units into Common Shares			11	66,649
Exercise of share options			3	16,738
Employee Share Purchase Plan (ESPP)			1	935
RETAINED EARNINGS
Net income attributable to controlling interests	316,386				316,386
Common Share distributions					(225,547)
Preferred Share distributions					(772)
Accumulated other comprehensive income (loss) - derivative instruments:
Losses reclassified into earnings from other comprehensive income	(2,334)					2,334
DISTRIBUTIONS
Distributions declared per Common Share outstanding							0.6025
NONCONTROLLING INTERESTS
Issuance of restricted units/shares				2,540
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(66,660)
Equity compensation associated with Noncontrolling Interests								4,043
Net income attributable to Noncontrolling Interests	10,913							10,913	741
Distributions to Noncontrolling Interests								(7,410)	(848)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership								(1,590)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				(31,426)				31,426
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	10,913							10,913	741
Distributions to Noncontrolling Interests								(7,410)	(848)
Balance, end of period at Jun. 30, 2021		37,280	3,744	9,110,121	1,321,875	(39,029)
Balance, end of period at Jun. 30, 2021								205,691	2,365
Balance, beginning of year at Dec. 31, 2021	10,954,948	37,280	3,755	9,121,122	1,827,063	(34,272)
Balance, beginning of year at Dec. 31, 2021	232,260							214,094	18,166
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				1,484
Exercise of share options			4	18,924
Employee Share Purchase Plan (ESPP)				2,378
Share-based employee compensation expense:
Issuance of restricted units/shares			2	7,359				1
Share options				1,390
ESPP discount				420
Offering costs				(487)
Supplemental Executive Retirement Plan (SERP)				(269)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,355)					(4,823)
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership	(98,140)			98,140
Adjustment for Noncontrolling Interests ownership in Operating Partnership				6,632				(6,632)
PAID IN CAPITAL
Conversion of OP Units into Common Shares				1,484
Exercise of share options			4	18,924
Employee Share Purchase Plan (ESPP)				2,378
RETAINED EARNINGS
Net income attributable to controlling interests	294,866				294,866
Common Share distributions					(470,424)
Preferred Share distributions					(1,545)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the period	(1,259)					(1,259)
Losses reclassified into earnings from other comprehensive income	(4,881)					4,881
DISTRIBUTIONS
Distributions declared per Common Share outstanding							1.25
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			2	7,359				1
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(1,484)
Equity compensation associated with Noncontrolling Interests								13,159
Net income attributable to Noncontrolling Interests	10,027							10,027	1,583
Distributions to Noncontrolling Interests								(15,488)	(17,263)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(2,649)							2,649
Adjustment for Noncontrolling Interests ownership in Operating Partnership				6,632				(6,632)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	10,027							10,027	1,583
Contributions by Noncontrolling Interests									603
Distributions to Noncontrolling Interests								(15,488)	(17,263)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,355)					(4,823)
Balance, end of period at Jun. 30, 2022	10,890,089	37,280	3,761	9,229,738	1,649,960	(30,650)
Balance, end of period at Jun. 30, 2022	214,592							216,326	(1,734)
Balance, beginning of year at Mar. 31, 2022		37,280	3,760	9,142,969	1,661,705	(31,847)
Balance, beginning of year at Mar. 31, 2022								217,451	3,415
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				1,310
Exercise of share options			1	4,583
Employee Share Purchase Plan (ESPP)				1,409
Share-based employee compensation expense:
Issuance of restricted units/shares				3,750
Share options				514
ESPP discount				249
Offering costs				(373)
Supplemental Executive Retirement Plan (SERP)				(106)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,355)					(4,823)
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership				97,201
Adjustment for Noncontrolling Interests ownership in Operating Partnership				5,587				(5,587)
PAID IN CAPITAL
Conversion of OP Units into Common Shares				1,310
Exercise of share options			1	4,583
Employee Share Purchase Plan (ESPP)				1,409
RETAINED EARNINGS
Net income attributable to controlling interests	224,101				224,101
Common Share distributions					(235,073)
Preferred Share distributions					(773)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the period	(1,259)					(1,259)
Losses reclassified into earnings from other comprehensive income	(2,456)					2,456
DISTRIBUTIONS
Distributions declared per Common Share outstanding							$ 0.625
NONCONTROLLING INTERESTS
Issuance of restricted units/shares				3,750
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(1,310)
Equity compensation associated with Noncontrolling Interests								5,361
Net income attributable to Noncontrolling Interests	7,633							7,633	944
Distributions to Noncontrolling Interests								(7,593)	(1,427)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership								371
Adjustment for Noncontrolling Interests ownership in Operating Partnership				5,587				(5,587)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	7,633							7,633	944
Contributions by Noncontrolling Interests									157
Distributions to Noncontrolling Interests								(7,593)	(1,427)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,355)					(4,823)
Balance, end of period at Jun. 30, 2022	10,890,089	$ 37,280	$ 3,761	$ 9,229,738	$ 1,649,960	$ (30,650)
Balance, end of period at Jun. 30, 2022	$ 214,592							$ 216,326	$ (1,734)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Statement Of Stockholders Equity [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01

CONSOLIDATED BALANCE SHEETS OF

CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
ASSETS
Land	$ 5,733,412	$ 5,814,790
Depreciable property	22,443,313	22,370,811
Projects under development	65,161	24,307
Land held for development	59,573	62,998
Investment in real estate	28,301,459	28,272,906
Accumulated depreciation	(8,740,806)	(8,354,282)
Investment in real estate, net	19,560,653	19,918,624
Investments in unconsolidated entities	169,272	127,448
Cash and cash equivalents	45,010	123,832
Restricted deposits	73,641	236,404
Right-of-use assets	468,834	474,713
Other assets	256,935	288,220
Total assets	20,574,345	21,169,241
Liabilities:
Mortgage notes payable, net	1,944,404	2,191,201
Notes, net	5,838,693	5,835,222
Line of credit and commercial paper	184,946	315,030
Accounts payable and accrued expenses	119,402	107,013
Accrued interest payable	69,037	69,510
Lease liabilities	310,513	312,335
Other liabilities	292,205	353,102
Security deposits	69,609	66,141
Distributions payable	242,667	233,502
Total liabilities	9,071,476	9,483,056
Commitments and contingencies
Redeemable Limited Partners	398,188	498,977
Partners’ Capital:
Accumulated other comprehensive income (loss)	(30,650)	(34,272)
Noncontrolling Interests – Partially Owned Properties	(1,734)	18,166
Total liabilities and equity	20,574,345	21,169,241
ERPOP [Member]
ASSETS
Land	5,733,412	5,814,790
Depreciable property	22,443,313	22,370,811
Projects under development	65,161	24,307
Land held for development	59,573	62,998
Investment in real estate	28,301,459	28,272,906
Accumulated depreciation	(8,740,806)	(8,354,282)
Investment in real estate, net	19,560,653	19,918,624
Investments in unconsolidated entities	169,272	127,448
Cash and cash equivalents	45,010	123,832
Restricted deposits	73,641	236,404
Right-of-use assets	468,834	474,713
Other assets	256,935	288,220
Total assets	20,574,345	21,169,241
Liabilities:
Mortgage notes payable, net	1,944,404	2,191,201
Notes, net	5,838,693	5,835,222
Line of credit and commercial paper	184,946	315,030
Accounts payable and accrued expenses	119,402	107,013
Accrued interest payable	69,037	69,510
Lease liabilities	310,513	312,335
Other liabilities	292,205	353,102
Security deposits	69,609	66,141
Distributions payable	242,667	233,502
Total liabilities	9,071,476	9,483,056
Commitments and contingencies
Redeemable Limited Partners	398,188	498,977
Partners’ Capital:
Preference Units	37,280	37,280
General Partner	10,883,459	10,951,940
Limited Partners	216,326	214,094
Accumulated other comprehensive income (loss)	(30,650)	(34,272)
Total partners’ capital	11,106,415	11,169,042
Noncontrolling Interests – Partially Owned Properties	(1,734)	18,166
Total capital	11,104,681	11,187,208
Total liabilities and equity	$ 20,574,345	$ 21,169,241

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
REVENUES
Rental income	$ 687,030	$ 598,059	$ 1,340,378	$ 1,195,661
EXPENSES
Property and maintenance	116,355	107,746	241,229	224,800
Real estate taxes and insurance	101,850	97,401	202,538	200,871
Property management	26,559	24,455	57,306	50,585
General and administrative	16,423	14,678	33,661	30,061
Depreciation	223,806	200,673	453,767	400,635
Total expenses	484,993	444,953	988,501	906,952
Net gain (loss) on sales of real estate properties	107,897	223,738	107,795	223,695
Operating income	309,934	376,844	459,672	512,404
Interest and other income	596	24,104	4,124	24,320
Other expenses	(2,380)	(3,342)	(5,436)	(7,452)
Interest:
Expense incurred, net	(71,889)	(67,124)	(144,681)	(134,482)
Amortization of deferred financing costs	(2,124)	(1,939)	(4,201)	(4,124)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	234,137	328,543	309,478	390,666
Income and other tax (expense) benefit	(291)	(242)	(573)	(395)
Income (loss) from investments in unconsolidated entities	(1,168)	(261)	(2,429)	(1,872)
Net gain (loss) on sales of land parcels				5
Net income	232,678	328,040	306,476	388,404
Partially Owned Properties	(944)	(741)	(1,583)	(1,423)
Net income attributable to controlling interests	$ 224,101	$ 316,386	$ 294,866	$ 373,925
Earnings per Unit – basic:
Net income available to Units	$ 0.59	$ 0.84	$ 0.78	$ 1
Earnings per Unit – diluted:
Net income available to Units	$ 0.59	$ 0.84	$ 0.78	$ 1
Weighted average Units outstanding	389,363	387,820	389,463	387,367
ERPOP [Member]
REVENUES
Rental income	$ 687,030	$ 598,059	$ 1,340,378	$ 1,195,661
EXPENSES
Property and maintenance	116,355	107,746	241,229	224,800
Real estate taxes and insurance	101,850	97,401	202,538	200,871
Property management	26,559	24,455	57,306	50,585
General and administrative	16,423	14,678	33,661	30,061
Depreciation	223,806	200,673	453,767	400,635
Total expenses	484,993	444,953	988,501	906,952
Net gain (loss) on sales of real estate properties	107,897	223,738	107,795	223,695
Operating income	309,934	376,844	459,672	512,404
Interest and other income	596	24,104	4,124	24,320
Other expenses	(2,380)	(3,342)	(5,436)	(7,452)
Interest:
Expense incurred, net	(71,889)	(67,124)	(144,681)	(134,482)
Amortization of deferred financing costs	(2,124)	(1,939)	(4,201)	(4,124)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	234,137	328,543	309,478	390,666
Income and other tax (expense) benefit	(291)	(242)	(573)	(395)
Income (loss) from investments in unconsolidated entities	(1,168)	(261)	(2,429)	(1,872)
Net gain (loss) on sales of land parcels				5
Net income	232,678	328,040	306,476	388,404
Partially Owned Properties	(944)	(741)	(1,583)	(1,423)
Net income attributable to controlling interests	231,734	327,299	304,893	386,981
ALLOCATION OF NET INCOME:
Preference Units	773	772	1,545	1,545
General Partner	223,328	315,614	293,321	372,380
Limited Partners	7,633	10,913	10,027	13,056
Net income available to Units	$ 230,961	$ 326,527	$ 303,348	$ 385,436
Earnings per Unit – basic:
Net income available to Units	$ 0.59	$ 0.84	$ 0.78	$ 1
Weighted average Units outstanding	387,664	385,856	387,531	385,594
Earnings per Unit – diluted:
Net income available to Units	$ 0.59	$ 0.84	$ 0.78	$ 1
Weighted average Units outstanding	389,363	387,820	389,463	387,367

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Comprehensive income:
Net income	$ 232,678	$ 328,040	$ 306,476	$ 388,404
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	(1,259)		(1,259)
Losses reclassified into earnings from other comprehensive income	2,456	2,334	4,881	4,637
Other comprehensive income (loss)	1,197	2,334	3,622	4,637
Comprehensive income	233,875	330,374	310,098	393,041
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(8,617)	(11,732)	(11,730)	(14,641)
Comprehensive income attributable to controlling interests	225,258	318,642	298,368	378,400
ERPOP [Member]
Comprehensive income:
Net income	232,678	328,040	306,476	388,404
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	(1,259)		(1,259)
Losses reclassified into earnings from other comprehensive income	2,456	2,334	4,881	4,637
Other comprehensive income (loss)	1,197	2,334	3,622	4,637
Comprehensive income	233,875	330,374	310,098	393,041
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(944)	(741)	(1,583)	(1,423)
Comprehensive income attributable to controlling interests	$ 232,931	$ 329,633	$ 308,515	$ 391,618

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 306,476	$ 388,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	453,767	400,635
Amortization of deferred financing costs	4,201	4,124
Amortization of above/below market lease intangibles		(154)
Amortization of discounts and premiums on debt	2,891	2,593
Amortization of deferred settlements on derivative instruments	4,875	4,631
Amortization of right-of-use assets	6,103	7,308
Write-off of pursuit costs	2,515	2,647
(Income) loss from investments in unconsolidated entities	2,429	1,872
Distributions from unconsolidated entities – return on capital	164
Net (gain) loss on sales of real estate properties	(107,795)	(223,695)
Net (gain) loss on sales of land parcels		(5)
Realized (gain) loss on sale of investment securities	(2,064)	(23,432)
Compensation paid with Company Common Shares	18,600	16,077
Changes in assets and liabilities:
(Increase) decrease in other assets	(2,096)	(4,462)
Increase (decrease) in accounts payable and accrued expenses	22,615	6,514
Increase (decrease) in accrued interest payable	(473)	(82)
Increase (decrease) in lease liabilities	(817)	(3,211)
Increase (decrease) in other liabilities	(23,985)	(5,387)
Increase (decrease) in security deposits	3,468	1,748
Net cash provided by operating activities	690,874	576,125
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(113,046)	(281,426)
Investment in real estate – development/other	(55,491)	(125,156)
Capital expenditures to real estate	(83,304)	(66,443)
Non-real estate capital additions	(981)	(1,042)
Interest capitalized for real estate and unconsolidated entities under development	(2,267)	(8,176)
Proceeds from disposition of real estate, net	255,922	406,922
Investments in unconsolidated entities – development/other	(48,577)	(4,491)
Distributions from unconsolidated entities – return of capital	9	4
Purchase of investment securities and other investments	(1,034)	(166,945)
Proceeds from sale of investment securities	3,434	191,398
Net cash provided by (used for) investing activities	(45,335)	(55,355)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(228)	(362)
Mortgage notes payable, net:
Proceeds	14,586	47,759
Lump sum payoffs	(260,874)	(59,880)
Scheduled principal repayments	(2,985)	(3,713)
Line of credit and commercial paper:
Commercial paper proceeds	2,836,037	2,819,940
Commercial paper repayments	(2,966,121)	(2,603,000)
Finance ground lease principal payments	(1,229)	(232)
Proceeds from Employee Share Purchase Plan (ESPP)	2,378	2,667
Proceeds from exercise of EQR options	18,928	39,623
Payment of offering costs	(487)
Other financing activities, net	(31)	(31)
Acquisition of Noncontrolling Interests – Partially Owned Properties	(32,178)
Contributions – Noncontrolling Interests – Partially Owned Properties	603
Contributions – Limited Partners	1
Distributions:
OP Units – General Partner	(461,605)	(448,983)
Preference Units	(1,545)	(1,545)
OP Units – Limited Partners	(15,142)	(16,540)
Noncontrolling Interests – Partially Owned Properties	(17,232)	(3,700)
Net cash provided by (used for) financing activities	(887,124)	(227,997)
Net increase (decrease) in cash and cash equivalents and restricted deposits	(241,585)	292,773
Cash and cash equivalents and restricted deposits, beginning of period	360,236	99,728
Cash and cash equivalents and restricted deposits, end of period	118,651	392,501
Cash and cash equivalents	45,010	39,492
Restricted deposits	73,641	353,009
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	136,787	126,742
Net cash paid (received) for income and other taxes	687	888
Amortization of deferred financing costs:
Investment in real estate, net	(253)	(100)
Other assets	1,170	1,169
Mortgage notes payable, net	1,159	1,139
Notes, net	2,125	1,916
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	1,545	1,374
Notes, net	1,346	1,219
Amortization of deferred settlements on derivative instruments:
Other liabilities	(6)	(6)
Accumulated other comprehensive income	4,881	4,637
Write-off of pursuit costs:
Investment in real estate, net	761	2,314
Investments in unconsolidated entities	1,637
Other assets	117	317
Accounts payable and accrued expenses		16
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	1,797	1,216
Other liabilities	632	656
Realized/unrealized (gain) loss on derivative instruments:
Other liabilities	1,259
Accumulated other comprehensive income	(1,259)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(675)	(8,176)
Investments in unconsolidated entities	1,592
Investments in unconsolidated entities – other:
Investments in unconsolidated entities	(47,887)	(3,231)
Other liabilities	(690)	(1,260)
Debt financing costs:
Other assets		(44)
Mortgage notes payable, net	(228)	(318)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	(224)	11,308
Lease liabilities	224	(11,308)
Non-cash share distribution and other transfers from unconsolidated entities:
Investments in unconsolidated entities	4,048	1,429
Other assets	(4,048)	(1,429)
ERPOP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	306,476	388,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	453,767	400,635
Amortization of deferred financing costs	4,201	4,124
Amortization of above/below market lease intangibles		(154)
Amortization of discounts and premiums on debt	2,891	2,593
Amortization of deferred settlements on derivative instruments	4,875	4,631
Amortization of right-of-use assets	6,103	7,308
Write-off of pursuit costs	2,515	2,647
(Income) loss from investments in unconsolidated entities	2,429	1,872
Distributions from unconsolidated entities – return on capital	164
Net (gain) loss on sales of real estate properties	(107,795)	(223,695)
Net (gain) loss on sales of land parcels		(5)
Realized (gain) loss on sale of investment securities	(2,064)	(23,432)
Compensation paid with Company Common Shares	18,600	16,077
Changes in assets and liabilities:
(Increase) decrease in other assets	(2,096)	(4,462)
Increase (decrease) in accounts payable and accrued expenses	22,615	6,514
Increase (decrease) in accrued interest payable	(473)	(82)
Increase (decrease) in lease liabilities	(817)	(3,211)
Increase (decrease) in other liabilities	(23,985)	(5,387)
Increase (decrease) in security deposits	3,468	1,748
Net cash provided by operating activities	690,874	576,125
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(113,046)	(281,426)
Investment in real estate – development/other	(55,491)	(125,156)
Capital expenditures to real estate	(83,304)	(66,443)
Non-real estate capital additions	(981)	(1,042)
Interest capitalized for real estate and unconsolidated entities under development	(2,267)	(8,176)
Proceeds from disposition of real estate, net	255,922	406,922
Investments in unconsolidated entities – development/other	(48,577)	(4,491)
Distributions from unconsolidated entities – return of capital	9	4
Purchase of investment securities and other investments	(1,034)	(166,945)
Proceeds from sale of investment securities	3,434	191,398
Net cash provided by (used for) investing activities	(45,335)	(55,355)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(228)	(362)
Mortgage notes payable, net:
Proceeds	14,586	47,759
Lump sum payoffs	(260,874)	(59,880)
Scheduled principal repayments	(2,985)	(3,713)
Line of credit and commercial paper:
Commercial paper proceeds	2,836,037	2,819,940
Commercial paper repayments	(2,966,121)	(2,603,000)
Finance ground lease principal payments	(1,229)	(232)
Proceeds from Employee Share Purchase Plan (ESPP)	2,378	2,667
Proceeds from exercise of EQR options	18,928	39,623
Payment of offering costs	(487)
Other financing activities, net	(31)	(31)
Acquisition of Noncontrolling Interests – Partially Owned Properties	(32,178)
Contributions – Noncontrolling Interests – Partially Owned Properties	603
Contributions – Limited Partners	1
Distributions:
OP Units – General Partner	(461,605)	(448,983)
Preference Units	(1,545)	(1,545)
OP Units – Limited Partners	(15,142)	(16,540)
Noncontrolling Interests – Partially Owned Properties	(17,232)	(3,700)
Net cash provided by (used for) financing activities	(887,124)	(227,997)
Net increase (decrease) in cash and cash equivalents and restricted deposits	(241,585)	292,773
Cash and cash equivalents and restricted deposits, beginning of period	360,236	99,728
Cash and cash equivalents and restricted deposits, end of period	118,651	392,501
Cash and cash equivalents	45,010	39,492
Restricted deposits	73,641	353,009
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	136,787	126,742
Net cash paid (received) for income and other taxes	687	888
Amortization of deferred financing costs:
Investment in real estate, net	(253)	(100)
Other assets	1,170	1,169
Mortgage notes payable, net	1,159	1,139
Notes, net	2,125	1,916
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	1,545	1,374
Notes, net	1,346	1,219
Amortization of deferred settlements on derivative instruments:
Other liabilities	(6)	(6)
Accumulated other comprehensive income	4,881	4,637
Write-off of pursuit costs:
Investment in real estate, net	761	2,314
Investments in unconsolidated entities	1,637
Other assets	117	317
Accounts payable and accrued expenses		16
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	1,797	1,216
Other liabilities	632	656
Realized/unrealized (gain) loss on derivative instruments:
Other liabilities	1,259
Accumulated other comprehensive income	(1,259)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(675)	(8,176)
Investments in unconsolidated entities	(1,592)
Investments in unconsolidated entities – other:
Investments in unconsolidated entities	(47,887)	(3,231)
Other liabilities	(690)	(1,260)
Debt financing costs:
Other assets		(44)
Mortgage notes payable, net	(228)	(318)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	(224)	11,308
Lease liabilities	224	(11,308)
Non-cash share distribution and other transfers from unconsolidated entities:
Investments in unconsolidated entities	4,048	1,429
Other assets	$ (4,048)	$ (1,429)

CONSOLIDATED STATEMENTS OF CH_3

CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	Total	ERPOP [Member]	PREFERRED SHARES ERPOP [Member]	General Partner [Member] ERPOP [Member]	Limited Partner ERPOP [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) ERPOP [Member]	DISTRIBUTIONS [Member] ERPOP [Member]	PARTIALLY OWNED PROPERTIES [Member] ERPOP [Member]
Balance, beginning of year at Dec. 31, 2020			$ 37,280	$ 10,532,037	$ 233,162	$ (43,666)
Balance, beginning of year at Dec. 31, 2020								$ 4,673
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				66,660	(66,660)
Exercise of EQR share options				39,623
EQR's Employee Share Purchase Plan (ESPP)		$ 2,667
EQR restricted shares				4,814
EQR share options				1,976
EQR ESPP discount				633
Net income available to Units - General Partner		372,380		372,380
OP Units General Partner distributions				(450,220)
Supplemental Executive Retirement Plan (SERP)				(2,057)
Change in market value of Redeemable Limited Partners				(101,966)
Adjustment for Limited Partners ownership in Operating Partnership				(30,807)	30,807
Equity compensation associated with Units - Limited Partners					10,531
Net income available to Units - Limited Partners		13,056			13,056
Units - Limited Partners distributions					(15,999)
Change in carrying value of Redeemable Limited Partners					794
Losses reclassified into earnings from other comprehensive income	$ (4,637)	(4,637)				4,637
Distributions declared per Unit outstanding							$ 1.205
Net income attributable to Noncontrolling Interests	388,404	388,404						1,423
Distributions to Noncontrolling Interests								(3,731)
Balance, end of period at Jun. 30, 2021			37,280	10,435,740	205,691	(39,029)
Balance, end of period at Jun. 30, 2021								2,365
Balance, beginning of year at Mar. 31, 2021			37,280	10,318,883	234,969	(41,363)
Balance, beginning of year at Mar. 31, 2021								2,472
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				66,660	(66,660)
Exercise of EQR share options				16,741
EQR's Employee Share Purchase Plan (ESPP)		936
EQR restricted shares				2,540
EQR share options				988
EQR ESPP discount				189
Net income available to Units - General Partner		315,614		315,614
OP Units General Partner distributions				(225,547)
Supplemental Executive Retirement Plan (SERP)				(828)
Change in market value of Redeemable Limited Partners				(29,010)
Adjustment for Limited Partners ownership in Operating Partnership				(31,426)	31,426
Equity compensation associated with Units - Limited Partners					4,043
Net income available to Units - Limited Partners		10,913			10,913
Units - Limited Partners distributions					(7,410)
Change in carrying value of Redeemable Limited Partners					(1,590)
Losses reclassified into earnings from other comprehensive income	(2,334)	(2,334)				2,334
Distributions declared per Unit outstanding							0.6025
Net income attributable to Noncontrolling Interests	328,040	328,040						741
Distributions to Noncontrolling Interests								(848)
Balance, end of period at Jun. 30, 2021			37,280	10,435,740	205,691	(39,029)
Balance, end of period at Jun. 30, 2021								2,365
Balance, beginning of year at Dec. 31, 2021			37,280	10,951,940	214,094	(34,272)
Balance, beginning of year at Dec. 31, 2021								18,166
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				1,484	(1,484)
Exercise of EQR share options				18,928
EQR's Employee Share Purchase Plan (ESPP)		2,378
EQR restricted shares				7,361	1
EQR share options				1,390
EQR ESPP discount				420
Net income available to Units - General Partner		293,321		293,321
OP Units General Partner distributions				(470,424)
Offering costs				(487)
Supplemental Executive Retirement Plan (SERP)				(269)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,355)				(4,823)
Change in market value of Redeemable Limited Partners				98,140
Adjustment for Limited Partners ownership in Operating Partnership				6,632	(6,632)
Equity compensation associated with Units - Limited Partners					13,159
Net income available to Units - Limited Partners		10,027			10,027
Units - Limited Partners distributions					(15,488)
Change in carrying value of Redeemable Limited Partners					2,649
Unrealized holding gains (losses) arising during the period	(1,259)	(1,259)				(1,259)
Losses reclassified into earnings from other comprehensive income	(4,881)	(4,881)				4,881
Distributions declared per Unit outstanding							1.25
Net income attributable to Noncontrolling Interests	306,476	306,476						1,583
Contributions by Noncontrolling Interests								603
Distributions to Noncontrolling Interests								(17,263)
Balance, end of period at Jun. 30, 2022			37,280	10,883,459	216,326	(30,650)
Balance, end of period at Jun. 30, 2022								(1,734)
Balance, beginning of year at Mar. 31, 2022			37,280	10,808,434	217,451	(31,847)
Balance, beginning of year at Mar. 31, 2022								3,415
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				1,310	(1,310)
Exercise of EQR share options				4,584
EQR's Employee Share Purchase Plan (ESPP)		1,409
EQR restricted shares				3,750
EQR share options				514
EQR ESPP discount				249
Net income available to Units - General Partner		223,328		223,328
OP Units General Partner distributions				(235,073)
Offering costs				(373)
Supplemental Executive Retirement Plan (SERP)				(106)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,355)				(4,823)
Change in market value of Redeemable Limited Partners				97,201
Adjustment for Limited Partners ownership in Operating Partnership				5,587	(5,587)
Equity compensation associated with Units - Limited Partners					5,361
Net income available to Units - Limited Partners		7,633			7,633
Units - Limited Partners distributions					(7,593)
Change in carrying value of Redeemable Limited Partners					371
Unrealized holding gains (losses) arising during the period	(1,259)	(1,259)				(1,259)
Losses reclassified into earnings from other comprehensive income	(2,456)	(2,456)				2,456
Distributions declared per Unit outstanding							$ 0.625
Net income attributable to Noncontrolling Interests	$ 232,678	$ 232,678						944
Contributions by Noncontrolling Interests								157
Distributions to Noncontrolling Interests								(1,427)
Balance, end of period at Jun. 30, 2022			$ 37,280	$ 10,883,459	$ 216,326	$ (30,650)
Balance, end of period at Jun. 30, 2022								$ (1,734)

Business

Business	6 Months Ended
	Jun. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business	1. Business Equity Residential (“EQR”) is an S&P 500 company focused on the acquisition, development and management of residential properties located in and around dynamic cities that attract affluent long-term renters, a business that is conducted on its behalf by ERP Operating Limited Partnership (“ERPOP”). EQR is a Maryland real estate investment trust (“REIT”) formed in March 1993 and ERPOP is an Illinois limited partnership formed in May 1993. ERPOP. ERPOP. EQR is the general partner of, and as of June 30, 2022 owned an approximate 96.7% ownership interest in, ERPOP. All of the Company’s property ownership, development and related business operations are conducted through the Operating Partnership ERPOP. ERPOP, As of June 30, 2022, the Company, directly or indirectly through investments in title holding entities, owned all or a portion of 310 properties located in 10 states and the District of Columbia consisting of 80,227 apartment units. The ownership breakdown includes (table does not include various uncompleted development properties): Properties Apartment Units Wholly Owned Properties 295 77,113 Partially Owned Properties – Consolidated 15 3,114 310 80,227

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2022
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 (“GAAP”) 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. Operating results for the six months ended June 30, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. 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, 2021 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, 2021 . Income and Other Taxes EQR has elected to be taxed as a REIT. This, along with the nature of the operations of its operating properties, resulted in no provision for federal income taxes at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their allocable 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. Recent Accounting Pronouncements In August 2020, the Financial Accounting Standards Board (“FASB”) issued an amendment to the debt and equity financial instruments standards which simplifies the accounting for convertible instruments and accounting for contracts in an entity’s own equity. The Company adopted the standard when effective on January 1, 2022 and it had no impact on its consolidated results of operations and financial position. In March 2020, the FASB issued an amendment to the reference rate reform standard which provides the option for a limited period of time to ease the potential burden in accounting for, or recognizing the effects of, reference rate reform on contract modifications and hedge accounting. An example of such reform is the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. Entities that make this optional expedient election would not have to remeasure the contracts at the modification date or reassess the accounting treatment if certain criteria are met and would continue applying hedge accounting for relationships affected by reference rate reform. The new standard was effective for the Company upon issuance and elections can be made through December 31, 2022. The Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. The Company continues to evaluate the impact of the guidance and may apply other elections as applicable as additional changes in the market occur.

Equity, Capital and Other Inter

Equity, Capital and Other Interests	6 Months Ended
	Jun. 30, 2022
Equity Capital And Other Interests [Abstract]
Equity, Capital and Other Interests	3. Equity, Capital and Other Interests The Company refers to “Common Shares” and “Units” (which refer to both OP Units and restricted units) as equity securities for EQR and “General Partner Units” and “Limited Partner Units” as equity securities for ERPOP. To provide a streamlined and more readable presentation of the disclosures for the Company and the Operating Partnership, several sections below refer to the respective terminology for each with the same financial information and separate sections are provided, where needed, to further distinguish any differences in financial information and terminology. The following table presents the changes in the Company’s issued and outstanding Common Shares and Units for the six months ended June 30, 2022 and 2021: 2022 2021 Common Shares Common Shares outstanding at January 1, 375,527,195 372,302,000 Common Shares Issued: Conversion of OP Units 31,089 1,084,023 Exercise of share options 348,510 833,669 Employee Share Purchase Plan (ESPP) 35,669 47,761 Restricted share grants, net 175,970 87,377 Common Shares outstanding at June 30, 376,118,433 374,354,830 Units Units outstanding at January 1, 12,659,027 13,858,073 Restricted unit grants, net 223,242 155,638 Conversion of OP Units to Common Shares (31,089 ) (1,084,023 ) Units outstanding at June 30, 12,851,180 12,929,688 Total Common Shares and Units outstanding at June 30, 388,969,613 387,284,518 Units Ownership Interest in Operating Partnership 3.3 % 3.3 % The following table presents the changes in the Operating Partnership’s issued and outstanding General Partner Units and Limited Partner Units for the six months ended June 30, 2022 and 2021: 2022 2021 General and Limited Partner Units General and Limited Partner Units outstanding at January 1, 388,186,222 386,160,073 Issued to General Partner: Exercise of EQR share options 348,510 833,669 EQR’s Employee Share Purchase Plan (ESPP) 35,669 47,761 EQR’s restricted share grants, net 175,970 87,377 Issued to Limited Partners: Restricted unit grants, net 223,242 155,638 General and Limited Partner Units outstanding at June 30, 388,969,613 387,284,518 Limited Partner Units Limited Partner Units outstanding at January 1, 12,659,027 13,858,073 Limited Partner restricted unit grants, net 223,242 155,638 Conversion of Limited Partner OP Units to EQR Common Shares (31,089 ) (1,084,023 ) Limited Partner Units outstanding at June 30, 12,851,180 12,929,688 Limited Partner Units Ownership Interest in Operating Partnership 3.3 % 3.3 % 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” and “Limited Partners Capital,” respectively, for the Company and the Operating Partnership. Subject to certain exceptions (including the “book-up” requirements of restricted units), the Noncontrolling Interests – Operating Partnership/Limited Partners Capital may exchange their Units with EQR for Common Shares on a one-for-one basis. The carrying value of the Noncontrolling Interests – Operating Partnership/Limited Partners Capital (including redeemable interests) is allocated based on the number of Noncontrolling Interests – Operating Partnership/Limited Partners Capital in total in proportion to the number of Noncontrolling Interests – Operating Partnership/Limited Partners Capital in total plus the total number of Common Shares/General Partner Units. Net income is allocated to the Noncontrolling Interests – Operating Partnership/Limited Partners Capital 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/Limited Partners Capital requesting an exchange of their Noncontrolling Interests – Operating Partnership/Limited Partners Capital with EQR. Once the Operating Partnership elects not to redeem the Noncontrolling Interests – Operating Partnership/Limited Partners Capital for cash, EQR is obligated to deliver Common Shares to the exchanging holder of the Noncontrolling Interests – Operating Partnership/Limited Partners Capital. The Noncontrolling Interests – Operating Partnership/Limited Partners Capital 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 Noncontrolling Interests – Operating Partnership/Limited Partners Capital are differentiated and referred to as “Redeemable Noncontrolling Interests – Operating Partnership” and “Redeemable Limited Partners,” respectively. 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/Redeemable Limited Partners 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/Limited Partners Capital that are classified in permanent equity at June 30, 2022 and December 31, 2021 . The carrying value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners is allocated based on the number of Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners in proportion to the number of Noncontrolling Interests – Operating Partnership/Limited Partners Capital in total. Such percentage of the total carrying value of Units/Limited Partner Units which is ascribed to the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners is then adjusted to the greater of carrying value or fair market value as described above. As of June 30, 2022 and 2021, the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners have a redemption value of approximately The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners for the six months ended June 30, 2022 and 2021, respectively (amounts in 2022 2021 Balance at January 1, $ 498,977 $ 338,951 Change in market value (98,140 ) 101,966 Change in carrying value (2,649 ) (794 ) Balance at June 30, $ 398,188 $ 440,123 Net proceeds from EQR Common Share and Preferred Share (see definition below) offerings and proceeds from exercise of options for Common Shares 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 proceeds from Common Shares and Preferred Shares are allocated for the Company between shareholders’ equity and Noncontrolling Interests – Operating Partnership and for the Operating Partnership between General Partner’s Capital and Limited Partners Capital to account for the change in their respective percentage ownership of the underlying equity. The 100,000,000 The following table presents the Company’s issued and outstanding Preferred Shares/Preference Units as June 30, 2022 and December 31, 2021 Amounts in thousands Annual Call Dividend Per June 30, December 31, Date (1) Share/Unit (2) 2022 2021 Preferred Shares/Preference Units of beneficial interest, $0.01 par value; 100,000,000 shares authorized: 8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of June 30, 2022 and December 31, 2021 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the call date, redeemable Preferred Shares/Preference Units may be redeemed for cash at the option of the Company or the Operating Partnership, respectively, in whole or in part, at a redemption price equal to the liquidation price per share/unit, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares/Preference Units are payable quarterly. Other EQR and ERPOP currently have an active universal shelf registration statement for the issuance of equity and debt securities that automatically became effective upon filing with the SEC in May 2022 and expires in May 2025. Per the terms of ERPOP’s partnership agreement, EQR contributes the net proceeds of 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) or preference units (on a one-for-one preferred share per preference unit basis). The Company has an At-The-Market (“ATM”) share offering program which allows EQR to issue Common Shares from time to time into the existing trading market at current market prices or through negotiated transactions, including under forward sale arrangements. In May 2022, the Company replaced the prior program with a new program with the authority to issue up to 13.0 million shares as of June 30, 2022 and which extended the program maturity to May 2025. Forward sale agreements under the ATM program allow the Company, at its election, to settle the agreements by issuing Common Shares in exchange for net proceeds at the then-applicable forward sale price specified by the agreement or, alternatively, to settle the agreements in whole or in part through the delivery or receipt of Common Shares or cash. Issuances of shares under these forward sale agreements are classified as equity transactions. Accordingly, no amounts relating to the forward sale agreements are recorded in the consolidated financial statements until settlement occurs. Prior to any settlements, the only impact to the consolidated financial statements is the inclusion of incremental shares, if any, within the calculation of diluted net income per share using the treasury stock method (see Note 11 for additional discussion). The actual forward price per share to be received by the Company upon settlement will be determined on the applicable settlement date based on adjustments made to the initial forward price to reflect the then-current overnight federal funds rate and the amount of dividends paid to holders of the Company’s Common Shares over the term of the forward sale agreement. As of June 30, 2022, the Company had entered into forward sale agreements under the prior program for a total of approximately 1.7 million Common Shares at a weighted average initial forward price per share of $83.25. All of these forward sale agreements were entered into during the quarter ended September 30, 2021. As of June 30, 2022, these forward sale agreements have not been settled and must be settled by March 2023. The Company may repurchase up to 13.0 million Common Shares under its share repurchase program. No open market repurchases have occurred since 2008, and no repurchases of any kind have occurred since February 2014. As of June 30, 2022, EQR has remaining authorization to repurchase up to 13.0 million of its shares.

Real Estate

Real Estate	6 Months Ended
	Jun. 30, 2022
Real Estate [Abstract]
Real Estate	4. Real Estate The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of June 30, 2022 and December 31, 2021 (amounts in thousands): June 30, 2022 December 31, 2021 Land $ 5,733,412 $ 5,814,790 Depreciable property: Buildings and improvements 19,654,296 19,632,284 Furniture, fixtures and equipment 2,271,136 2,220,203 In-Place lease intangibles 517,881 518,324 Projects under development: Land 3,200 — Construction-in-progress 61,961 24,307 Land held for development: Land 46,160 46,160 Construction-in-progress 13,413 16,838 Investment in real estate 28,301,459 28,272,906 Accumulated depreciation (8,740,806 ) (8,354,282 ) Investment in real estate, net $ 19,560,653 $ 19,918,624 During the six months ended June 30, 2022, the Company acquired the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 1 172 $ 113,000 Total 1 172 $ 113,000 (1) Purchase price includes an allocation of approximately $25.3 million to land and $87.7 million to depreciable property (inclusive of capitalized closing costs). During the six months ended June 30, 2022 , the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Rental Properties – Consolidated 1 354 $ 265,650 Total 1 354 $ 265,650 The Company recognized a net gain on sales of real estate properties of approximately $ million on the above sale

Commitments to Acquire_Dispose

Commitments to Acquire/Dispose of Real Estate	6 Months Ended
	Jun. 30, 2022
Commitments To Acquire Dispose Of Real Estate [Abstract]
Commitments to Acquire/Dispose of Real Estate	5. Commitments to Acquire/Dispose of Real The Company has not entered into any agreements to acquire rental properties or land parcels as of the date of filing. The Company has entered into an agreement to dispose of the following (sales price and net book value in thousands): Properties Apartment Units Sales Price Net Book Value at June 30, 2022 Rental Properties - Consolidated 1 136 $ 65,500 $ 41,695 Total 1 136 $ 65,500 $ 41,695 The closing of pending transactions is subject to certain conditions and restrictions; therefore, there can be no assurance that the transactions will be consummated or that the final terms will not differ in material respects from any agreements summarized above. See Note 14 for discussion of the properties acquired or disposed of, if any, subsequent to June 30, 2022.

Investments in Partially Owned

Investments in Partially Owned Entities	6 Months Ended
	Jun. 30, 2022
Investments In Partially Owned Entities [Abstract]
Investments in Partially Owned Entities	6. Investments in Partially Owned The entities Consolidated Variable Interest Entities (“VIEs”) In accordance with accounting standards for consolidation of VIEs , the 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. The Company has various equity interests in certain joint ventures that have been deemed to be VIEs, and the Company is the VIEs’ primary beneficiary. As a result, the joint ventures are required to be consolidated on the Company’s financial statements. The following table summarizes the Company’s consolidated joint ventures as of June 30, 2022: Operating Properties (1) Project Under Development (2) Properties Apartment Units Project Apartment Units Consolidated Joint Ventures (VIE) 15 3,114 1 312 ( 1 ) During the second quarter of 2022, the Company acquired its joint venture partner’s 25% interest in a 432-unit apartment property for $32.2 million, and the property is now wholly owned. ( 2 ) The land under this project is subject to a long-term ground lease. The following table provides consolidated assets and liabilities related to the VIEs discussed above as of June 30, 2022 and December 31, 2021 (amounts in thousands): June 30, 2022 December 31, 2021 Consolidated Assets $ 660,062 $ 912,955 Consolidated Liabilities $ 127,702 $ 251,424 Certain consolidated joint ventures in which we have investments obtained mortgage debt to finance a portion of their activities. The following table and information summarizes the variable rate construction mortgage debt that is non-recourse to the Company at June 30, 2022 (aggregate and amounts borrowed under loan commitments in thousands): Recently Completed Operating Property (1) Project Under Development Number of joint ventures with debt financing 1 1 Aggregate loan commitments $ 67,589 $ 73,344 Amounts borrowed under loan commitments (2) $ 64,856 $ 11,512 Maturity dates 2023 2025 (1) The maturity date of the construction loan was extended on June 24, 2022 to June 25, 2023. ( 2) See Note 9 for the current period proceeds of secured conventional floating rate debt under Mortgage Notes Payable Investments in Unconsolidated Entities The Company has various equity interests in certain joint ventures that are unconsolidated and accounted for using the equity method of accounting. Most of these have been deemed to be VIEs and the Company is not the VIEs' primary beneficiary. The remaining have been deemed not to be VIEs and the Company does not have a controlling voting interest. The following table and information summarizes the Company’s investments in unconsolidated entities as of June 30, 2022 June 30, 2022 December 31, 2021 Ownership Percentage Investments in Unconsolidated Entities: Various Real Estate Holdings (VIE) (1) $ 36,396 $ 36,024 Varies Development Projects (VIE) (2) 110,657 72,488 62% - 90% (4) Real Estate Technology (VIE) (3) 22,456 19,347 Varies Other (237 ) (411 ) Varies Investments in Unconsolidated Entities $ 169,272 $ 127,448 (1) Represents unconsolidated interests in entities with various real estate holdings. (2) Represents unconsolidated interests in projects under development and land held for development. (3) Represents unconsolidated investments in real estate technology funds/companies. (4) In certain instances, the joint venture agreements contain provisions for promoted interests in favor of our joint venture partner. If the terms of the promoted interest are attained, then our share of the proceeds from a sale or other capital event of the unconsolidated entity may be less than the indicated ownership percentage. The following table summarizes the Company’s unconsolidated joint ventures that were deemed to be VIEs as of June 30, 2022: Real Estate Holdings (1) Projects Under Development (2) Land Held for Development (2), (3) Entities Projects Apartment Units (4) Projects Apartment Units (4) Unconsolidated Joint Ventures (VIE) 2 4 1,291 2 640 (1) Represents entities that hold various real estate investments. (2) Represents separate unconsolidated joint ventures for the purpose of developing multifamily rental properties. ( 3 ) Represents separate unconsolidated joint ventures that have not yet started but are expected to start construction in 2022. One parcel is subject to a long-term ground lease. ( 4 ) Represents the intended number of apartment units to be developed.

Restricted Deposits

Restricted Deposits	6 Months Ended
	Jun. 30, 2022
Deposits Restricted [Abstract]
Restricted Deposits	7. Restricted Deposits The following table presents the Company’s restricted deposits as of June 30, 2022 and December 31, 2021 (amounts in thousands): June 30, 2022 December 31, 2021 Mortgage escrow deposits: Replacement reserves $ 11,855 $ 11,156 Mortgage principal reserves/sinking funds 21,752 19,104 Mortgage escrow deposits 33,607 30,260 Restricted cash: Tax-deferred (1031) exchange proceeds — 166,362 Earnest money on pending acquisitions — 2,000 Restricted deposits on real estate investments 242 284 Resident security and utility deposits 37,504 35,663 Other 2,288 1,835 Restricted cash 40,034 206,144 Restricted deposits $ 73,641 $ 236,404

Leases

Leases	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Leases	8 . Leases Lessor Accounting The Company is the lessor for its residential and non-residential leases and these leases are accounted for as operating leases under the lease standard. For the six months ended June 30, 2022, approximately 97% of the Company’s total lease revenue is generated from residential apartment leases that are generally twelve months or less in length. The residential apartment leases may include lease income related to such items as utility recoveries, parking rent, storage rent and pet rent that the Company treats as a single lease component because the amenities cannot be leased on their own and the timing and pattern of revenue recognition are the same. The collection of lease payments at lease commencement is probable and therefore the Company subsequently recognizes lease income over the lease term on a straight-line basis. Residential leases are renewable upon consent of both parties on an annual or monthly basis. For the six months ended June 30, 2022, approximately 3% of the Company’s total lease revenue is generated by non-residential leases that are generally for terms ranging between five to ten years. The non-residential leases generally consist of ground floor retail spaces and master-leased parking garages that serve as additional amenities for our residents. The non-residential leases may include lease income related to such items as utility recoveries, parking rent and storage rent that the Company treats as a single lease component because the amenities cannot be leased on their own and the timing and pattern of revenue recognition are the same. The collection of lease payments at lease commencement is probable and therefore the Company subsequently recognizes lease income over the lease term on a straight-line basis. Non-residential leases are renewable with market-based renewal options. The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the six months ended June 30, 2022 and 2021 (amounts in thousands): Six Months Ended June 30, 2022 Six Months Ended June 30, 2021 Income Type Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential and non-residential rent $ 1,192,048 $ 32,095 $ 1,224,143 $ 1,078,304 $ 31,237 $ 1,109,541 Utility recoveries (RUBS income) (1) 39,583 369 39,952 36,533 330 36,863 Parking rent 21,706 202 21,908 19,890 362 20,252 Other lease revenue (2) (889 ) (197 ) (1,086 ) (18,970 ) 1,138 (17,832 ) Total lease revenue $ 1,252,448 $ 32,469 1,284,917 $ 1,115,757 $ 33,067 1,148,824 Parking revenue 18,431 11,572 Other revenue 37,030 35,265 Total other rental income (3) 55,461 46,837 Rental income $ 1,340,378 $ 1,195,661 (1) RUBS income primarily consists of variable payments representing the recovery of utility costs from residents. (2) Other lease revenue consists of the revenue adjustment related to bad debt and other miscellaneous lease revenue. (3) Other rental income is accounted for under the revenue recognition standard. The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the quarters ended June 30, 2022 and 2021 (amounts in thousands): Quarter Ended June 30, 2022 Quarter Ended June 30, 2021 Income Type Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential and non-residential rent $ 605,158 $ 16,221 $ 621,379 $ 538,649 $ 15,398 $ 554,047 Utility recoveries (RUBS income) (1) 19,985 188 20,173 18,579 152 18,731 Parking rent 10,923 104 11,027 10,156 95 10,251 Other lease revenue (2) 5,412 (154 ) 5,258 (8,708 ) 529 (8,179 ) Total lease revenue $ 641,478 $ 16,359 657,837 $ 558,676 $ 16,174 574,850 Parking revenue 9,623 6,139 Other revenue 19,570 17,070 Total other rental income (3) 29,193 23,209 Rental income $ 687,030 $ 598,059 (1) RUBS income primarily consists of variable payments representing the recovery of utility costs from residents. (2) Other lease revenue consists of the revenue adjustment related to bad debt and other miscellaneous lease revenue. (3) Other rental income is accounted for under the revenue recognition standard. The following table presents residential and non-residential accounts receivable and straight-line receivable balances for the Company’s properties as of June 30, 2022 and December 31, 2021 (amounts in thousands): Residential Non-Residential Balance Sheet (Other assets): June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 Resident/tenant accounts receivable balances $ 36,068 $ 37,959 $ 3,444 $ 3,218 Allowance for doubtful accounts (32,358 ) (33,121 ) (2,553 ) (2,365 ) Net receivable balances $ 3,710 (1) $ 4,838 $ 891 $ 853 Straight-line receivable balances $ 4,757 $ 7,460 $ 13,551 $ 13,021 (1) The Company held residential security deposits approximating 62.6% of the net residential receivable balance at June 30, 2022 The following table presents residential bad debt for the Company’s properties for the six months and quarters ended June 30, 2022 and 2021 (amounts in thousands): Six Months Ended June 30, Quarter Ended June 30, Income Statement (Rental income): 2022 2021 2022 2021 Bad debt, net (1) $ 8,147 $ 25,772 $ (1,748 ) $ 12,079 % of rental income 0.6 % 2.2 % (0.3 %) 2.1 % (1) Bad debt, net benefited from additional resident payments due to governmental rental assistance programs of approximately $24.6 million and $14.8 million for the six months and quarter ended June 30, 2022, respectively

Debt

Debt	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Debt	9 . Debt EQR Mortgage Notes Payable The following table summarizes the Company’s mortgage notes payable activity for the six months ended June 30, 2022 (amounts in thousands): Mortgage notes payable, net as of December 31, 2021 Proceeds Lump sum payoffs Scheduled principal repayments Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Mortgage notes payable, net as of June 30, 2022 Fixed Rate Debt: Secured – Conventional $ 1,896,472 $ — $ (260,874 ) $ (2,985 ) $ 928 $ 714 $ 1,634,255 Floating Rate Debt: Secured – Conventional 59,890 14,586 (2) — — — 148 74,624 Secured – Tax Exempt 234,839 — — — 617 69 235,525 Floating Rate Debt 294,729 14,586 — — 617 217 310,149 Total $ 2,191,201 $ 14,586 $ (260,874 ) $ (2,985 ) $ 1,545 $ 931 $ 1,944,404 (1) Represents amortization of deferred financing costs, net of debt financing costs. (2) See Note 6 for additional discussion of the variable rate construction mortgage debt. The following table summarizes certain interest rate and maturity date information as of and for the six months ended June 30, 2022: June 30, 2022 Interest Rate Ranges 0.10% - 4.21% Weighted Average Interest Rate 3.37% Maturity Date Ranges 2023-2061 As of June 30, 2022, the Company had $250.0 million of secured debt (primarily tax-exempt bonds) subject to third-party credit enhancement. Notes The following table summarizes the Company’s notes activity for the six months ended June 30, 2022 (amounts in thousands): Notes, net as of December 31, 2021 Proceeds Lump sum payoffs Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Notes, net as of June 30, 2022 Fixed Rate Debt: Unsecured – Public $ 5,835,222 $ — $ — $ 1,346 $ 2,125 $ 5,838,693 (1) Represents amortization of deferred financing costs, net of debt financing costs. The following table summarizes certain interest rate and maturity date information as of and for the six months ended June 30, 2022: June 30, 2022 Interest Rate Ranges 1.85% - 7.57% Weighted Average Interest Rate 3.60% Maturity Date Ranges 2023-2047 The Company’s unsecured public notes contain certain financial and operating covenants including, among other things, maintenance of certain financial ratios. The Company was in compliance with its unsecured public debt covenants for the six months ended June 30, 2022. Line of Credit and Commercial Paper The Company has a $2.5 billion unsecured revolving credit facility maturing November 1, 2024. The Company has the ability to increase available borrowings by an additional $750.0 million by adding lenders to the facility, obtaining the agreement of existing lenders to increase their commitments or incurring one or more term loans. The interest rate on advances under the facility will generally be LIBOR plus a spread (currently 0.775%), or based on bids received from the lending group, and the Company pays an annual facility fee (currently 0.125%). Both the spread and the facility fee are dependent on the Company’s senior unsecured credit rating. The Company did not borrow any amounts under its revolving credit facility during the six months ended June 30, 2022. The Company has an unsecured commercial paper note program under which it may borrow up to a maximum of $1.0 billion 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. The notes bear interest at various floating rates with a weighted average interest rate of 0.60% for the six months ended June 30, 2022 and a weighted average maturity of 12 days as of June 30, 2022. The weighted average amount outstanding for the six months ended June 30, 2022 was approximately $186.7 million. The Company limits its utilization of the revolving credit facility in order to maintain liquidity to support its $1.0 billion commercial paper program along with certain other obligations. The following table presents the availability on the Company’s unsecured revolving credit facility as of June 30, 2022 (amounts in thousands): June 30, 2022 Unsecured revolving credit facility commitment $ 2,500,000 Commercial paper balance outstanding (185,037 ) Unsecured revolving credit facility balance outstanding — Other restricted amounts (3,463 ) Unsecured revolving credit facility availability $ 2,311,500 Other The following table summarizes the Company’s total debt extinguishment costs recorded as additional interest expense for the six months and quarters ended June 30, 2022 and 2021 (amounts in thousands): Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Write-offs of unamortized deferred financing costs $ 92 $ 264 $ 92 $ — Write-offs of unamortized (premiums)/discounts/OCI 377 — 377 — Total $ 469 $ 264 $ 469 $ —

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	10 . Fair Value Measurements 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 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 may seek 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. A • 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 value The Company’s derivative positions are valued using models developed by the respective counterparty as well as models applied internally by the Company that use as their inputs readily observable market parameters (such as forward yield curves and credit default swap data). The following table summarizes the inputs to the valuations for each type of fair value measurement: Fair Value Measurement Type Valuation Inputs Employee holdings (other than Common Shares) within the supplemental executive retirement plan (the “SERP”) Quoted market prices for identical assets. These holdings are included in other assets and other liabilities on the consolidated balance sheets. Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Quoted market price of Common Shares. Mortgage notes payable and private unsecured debt (including its commercial paper and line of credit, if applicable) Indicative rates provided by lenders of similar loans. Public unsecured notes Quoted market prices for each underlying issuance. 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. The June 30, 2022 December 31, 2021 Carrying Value Estimated Fair Value (Level 2) Carrying Value Estimated Fair Value (Level 2) Mortgage notes payable, net $ 1,944,404 $ 1,847,010 $ 2,191,201 $ 2,193,689 Unsecured debt, net 6,023,639 5,693,443 6,150,252 6,798,309 Total debt, net $ 7,968,043 $ 7,540,453 $ 8,341,453 $ 8,991,998 The following table summarizes the Company’s consolidated derivative instruments at June 30, 2022 (dollar amounts are in thousands): Forward Starting Swaps (1) Current Notional Balance $ 150,000 Lowest Interest Rate 2.790 % Highest Interest Rate 2.972 % Maturity Date 2033 (1) Forward Starting Swaps – Designed to partially fix interest rates in advance of planned future debt issuances. These swaps have mandatory counterparty terminations in 2024 and are targeted for certain 2023 debt issuances. The Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 6/30/2022 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 129,067 $ 129,067 $ — $ — Liabilities Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps Other Liabilities $ 1,259 $ — $ 1,259 $ — Supplemental Executive Retirement Plan Other Liabilities 129,067 129,067 — — Total $ 130,326 $ 129,067 $ 1,259 $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 398,188 $ — $ 398,188 $ — Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2021 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 164,650 $ 164,650 $ — $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 164,650 $ 164,650 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 498,977 $ — $ 498,977 $ — The June 30, 2022 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (1,259 ) Interest expense $ (4,881 ) Total $ (1,259 ) $ (4,881 ) June 30, 2021 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ — Interest expense $ (4,637 ) Total $ — $ (4,637 ) As

Earnings Per Share and Earnings

Earnings Per Share and Earnings Per Unit	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Share And Earnings Per Unit	1 1 . Earnings Per Share and Earnings Per Equity Residential The Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Numerator for net income per share – basic: Net income $ 306,476 $ 388,404 $ 232,678 $ 328,040 Allocation to Noncontrolling Interests – Operating Partnership (10,027 ) (13,056 ) (7,633 ) (10,913 ) Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (1,583 ) (1,423 ) (944 ) (741 ) Preferred distributions (1,545 ) (1,545 ) (773 ) (772 ) Numerator for net income per share – basic $ 293,321 $ 372,380 $ 223,328 $ 315,614 Numerator for net income per share – diluted: Net income $ 306,476 $ 388,404 $ 232,678 $ 328,040 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (1,583 ) (1,423 ) (944 ) (741 ) Preferred distributions (1,545 ) (1,545 ) (773 ) (772 ) Numerator for net income per share – diluted $ 303,348 $ 385,436 $ 230,961 $ 326,527 Denominator for net income per share – basic and diluted: Denominator for net income per share – basic 375,640 373,050 375,769 373,812 Effect of dilutive securities: OP Units 11,891 12,544 11,895 12,044 Long-term compensation shares/units 1,863 1,773 1,698 1,964 ATM forward sales 69 — 1 — Denominator for net income per share – diluted 389,463 387,367 389,363 387,820 Net income per share – basic $ 0.78 $ 1.00 $ 0.59 $ 0.84 Net income per share – diluted $ 0.78 $ 1.00 $ 0.59 $ 0.84 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): Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Numerator for net income per Unit – basic and diluted: Net income $ 306,476 $ 388,404 $ 232,678 $ 328,040 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (1,583 ) (1,423 ) (944 ) (741 ) Allocation to Preference Units (1,545 ) (1,545 ) (773 ) (772 ) Numerator for net income per Unit – basic and diluted $ 303,348 $ 385,436 $ 230,961 $ 326,527 Denominator for net income per Unit – basic and diluted: Denominator for net income per Unit – basic 387,531 385,594 387,664 385,856 Effect of dilutive securities: Dilution for Units issuable upon assumed exercise/vesting of the Company’s long-term compensation shares/units 1,863 1,773 1,698 1,964 ATM forward sales 69 — 1 — Denominator for net income per Unit – diluted 389,463 387,367 389,363 387,820 Net income per Unit – basic $ 0.78 $ 1.00 $ 0.59 $ 0.84 Net income per Unit – diluted $ 0.78 $ 1.00 $ 0.59 $ 0.84

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2022
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	1 2 . Commitments Real Estate Development Commitments As of June 30, 2022, the Company has both consolidated and unconsolidated real estate projects under development. We have entered into, and may continue in the future to enter into, joint venture agreements with third-party partners for the development of multifamily rental properties. The joint venture agreements with each development partner include buy-sell provisions that provide the right, but not the obligation, for the Company to acquire each respective 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 additional discussion. The following table summarizes the gross remaining total project costs for the Company’s projects under development at June 30, 2022 (total project costs remaining in thousands): Projects Apartment Units Total Project Costs Remaining (1) Projects Under Development Consolidated 2 537 $ 195,487 Unconsolidated 4 1,291 291,066 Total Projects Under Development 6 1,828 $ 486,553 (1) The Other Commitments We have entered into, and may continue in the future to enter into, real estate technology and other real estate fund investments. At June 30, 2022, the Company has invested in eight real estate technology funds and one other real estate investment fund with aggregate remaining commitments of approximately $24.7 million. Contingencies Litigation and Legal Matters The Company, as an owner of real estate, is subject to various federal, state and local 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. 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.

Reportable Segments

Reportable Segments	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Reportable Segments	1 3 . Reportable 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 chief 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. While the Company does maintain a non-residential presence, it accounts for approximately 3.8% of total revenues for the six months ended June 30, 2022 and is designed as an amenity for our residential residents. The chief operating decision maker evaluates the performance of each property on a consolidated residential and non-residential basis. The Company’s geographic consolidated same store operating segments represent its reportable segments. The Company’s 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. All The primary financial measure for the Company’s rental real estate segment is net operating income (“NOI”), which represents The Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Rental income $ 1,340,378 $ 1,195,661 $ 687,030 $ 598,059 Property and maintenance expense (241,229 ) (224,800 ) (116,355 ) (107,746 ) Real estate taxes and insurance expense (202,538 ) (200,871 ) (101,850 ) (97,401 ) Total operating expenses (443,767 ) (425,671 ) (218,205 ) (205,147 ) Net operating income $ 896,611 $ 769,990 $ 468,825 $ 392,912 The following tables present NOI from our rental real estate for each segment for the six months and quarters ended June 30, 2022 and 2021, respectively, as well as total assets and capital expenditures at June 30, 2022 (amounts in thousands): Six Months Ended June 30, 2022 Six Months Ended June 30, 2021 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 241,119 $ 72,466 $ 168,653 $ 213,291 $ 70,202 $ 143,089 Orange County 60,018 12,805 47,213 52,510 12,411 40,099 San Diego 42,410 9,555 32,855 37,928 9,176 28,752 Subtotal - Southern California 343,547 94,826 248,721 303,729 91,789 211,940 San Francisco 206,018 61,588 144,430 188,762 59,386 129,376 Washington D.C. 203,494 68,073 135,421 194,911 64,309 130,602 New York 218,855 99,705 119,150 188,676 98,235 90,441 Seattle 137,255 38,837 98,418 126,450 40,434 86,016 Boston 127,660 39,881 87,779 115,089 38,077 77,012 Denver 21,404 5,939 15,465 18,920 5,532 13,388 Total same store 1,258,233 408,849 849,384 1,136,537 397,762 738,775 Non-same store/other Non-same store (2) 77,019 31,614 45,405 5,186 2,299 2,887 Other (3) 5,126 3,304 1,822 53,938 25,610 28,328 Total non-same store/other 82,145 34,918 47,227 59,124 27,909 31,215 Totals $ 1,340,378 $ 443,767 $ 896,611 $ 1,195,661 $ 425,671 $ 769,990 (1) For the six months ended June 30, 2022 and 2021, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2021, less properties subsequently sold, which represented 74,057 apartment (2) For the six months ended June 30, 2022 and 2021, non-same store primarily includes properties acquired after January 1, 2021, plus any properties in lease-up and not stabilized as of January 1, (3) Other includes development, other corporate operations and operations prior to disposition for properties sold. Quarter Ended June 30, 2022 Quarter Ended June 30, 2021 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 125,767 $ 35,692 $ 90,075 $ 106,873 $ 34,509 $ 72,364 Orange County 31,252 6,381 24,871 26,669 6,096 20,573 San Diego 21,470 4,626 16,844 19,188 4,543 14,645 Subtotal - Southern California 178,489 46,699 131,790 152,730 45,148 107,582 San Francisco 105,402 30,050 75,352 93,784 28,982 64,802 Washington D.C. 103,022 34,172 68,850 97,423 31,701 65,722 New York 112,865 48,559 64,306 94,473 48,258 46,215 Seattle 70,128 19,512 50,616 62,603 19,999 42,604 Boston 65,066 19,443 45,623 57,777 18,530 39,247 Denver 10,825 2,930 7,895 9,575 2,710 6,865 Total same store 645,797 201,365 444,432 568,365 195,328 373,037 Non-same store/other Non-same store (2) 40,501 15,646 24,855 3,436 1,660 1,776 Other (3) 732 1,194 (462 ) 26,258 8,159 18,099 Total non-same store/other 41,233 16,840 24,393 29,694 9,819 19,875 Totals $ 687,030 $ 218,205 $ 468,825 $ 598,059 $ 205,147 $ 392,912 (1) For the quarters ended June 30, 2022 and 2021, same store primarily includes all properties acquired or completed that were stabilized prior to April 1, 2021, less properties subsequently sold, which represented 74,057 apartment (2) For the quarters ended June 30, 2022 and 2021, non-same store primarily includes properties acquired after April 1, 2021, plus any properties in lease-up and not stabilized as of April 1, (3) Other includes development, other corporate operations and operations prior to disposition for properties sold. Six Months Ended June 30, 2022 Total Assets Capital Expenditures Same store (1) Los Angeles $ 2,748,850 $ 14,728 Orange County 362,679 2,643 San Diego 228,219 1,828 Subtotal - Southern California 3,339,748 19,199 San Francisco 3,114,937 13,003 Washington D.C. 3,120,459 13,391 New York 3,700,473 12,422 Seattle 2,106,727 8,761 Boston 1,708,006 9,799 Denver 482,417 562 Total same store 17,572,767 77,137 Non-same store/other Non-same store (2) 2,421,668 6,053 Other (3) 579,910 114 Total non-same store/other 3,001,578 6,167 Totals $ 20,574,345 $ 83,304 (1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2021, less properties subsequently sold, which represented 74,057 apartment (2) Non-same store primarily includes properties acquired after January 1, 2021, plus any properties in lease-up and not stabilized as of January 1, (3) Other includes development, other corporate operations and capital expenditures for properties

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	1 4 . Subsequent Subsequent to June 30, 2022, the Company: • Sold one property consisting of 455 apartment units for approximately $415.0 million; • Entered into $200.0 million of forward starting swaps to hedge changes in interest rates related to future taxable secured or unsecured debt issuances; and • Sent a redemption notice on its $500.0 million unsecured notes due in 2023. The redemption is expected to occur in the third quarter of 2022 and will be funded from disposition proceeds

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2022
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 (“GAAP”) 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. Operating results for the six months ended June 30, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. 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, 2021 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, 2021 .
Income and Other Taxes	Income and Other Taxes EQR has elected to be taxed as a REIT. This, along with the nature of the operations of its operating properties, resulted in no provision for federal income taxes at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their allocable 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.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In August 2020, the Financial Accounting Standards Board (“FASB”) issued an amendment to the debt and equity financial instruments standards which simplifies the accounting for convertible instruments and accounting for contracts in an entity’s own equity. The Company adopted the standard when effective on January 1, 2022 and it had no impact on its consolidated results of operations and financial position. In March 2020, the FASB issued an amendment to the reference rate reform standard which provides the option for a limited period of time to ease the potential burden in accounting for, or recognizing the effects of, reference rate reform on contract modifications and hedge accounting. An example of such reform is the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. Entities that make this optional expedient election would not have to remeasure the contracts at the modification date or reassess the accounting treatment if certain criteria are met and would continue applying hedge accounting for relationships affected by reference rate reform. The new standard was effective for the Company upon issuance and elections can be made through December 31, 2022. The Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. The Company continues to evaluate the impact of the guidance and may apply other elections as applicable as additional changes in the market occur.

Business (Tables)

Business (Tables)	6 Months Ended
	Jun. 30, 2022
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 295 77,113 Partially Owned Properties – Consolidated 15 3,114 310 80,227

Equity, Capital and Other Int_2

Equity, Capital and Other Interests (Tables)	6 Months Ended
	Jun. 30, 2022
Class Of Stock [Line Items]
Changes in Issued and Outstanding Common Shares and Units	The following table presents the changes in the Company’s issued and outstanding Common Shares and Units for the six months ended June 30, 2022 and 2021: 2022 2021 Common Shares Common Shares outstanding at January 1, 375,527,195 372,302,000 Common Shares Issued: Conversion of OP Units 31,089 1,084,023 Exercise of share options 348,510 833,669 Employee Share Purchase Plan (ESPP) 35,669 47,761 Restricted share grants, net 175,970 87,377 Common Shares outstanding at June 30, 376,118,433 374,354,830 Units Units outstanding at January 1, 12,659,027 13,858,073 Restricted unit grants, net 223,242 155,638 Conversion of OP Units to Common Shares (31,089 ) (1,084,023 ) Units outstanding at June 30, 12,851,180 12,929,688 Total Common Shares and Units outstanding at June 30, 388,969,613 387,284,518 Units Ownership Interest in Operating Partnership 3.3 % 3.3 %
Changes in Redemption Value of Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners for the six months ended June 30, 2022 and 2021, respectively (amounts in 2022 2021 Balance at January 1, $ 498,977 $ 338,951 Change in market value (98,140 ) 101,966 Change in carrying value (2,649 ) (794 ) Balance at June 30, $ 398,188 $ 440,123
Issued and Outstanding Preferred Shares and Preference Units	The following table presents the Company’s issued and outstanding Preferred Shares/Preference Units as June 30, 2022 and December 31, 2021 Amounts in thousands Annual Call Dividend Per June 30, December 31, Date (1) Share/Unit (2) 2022 2021 Preferred Shares/Preference Units of beneficial interest, $0.01 par value; 100,000,000 shares authorized: 8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of June 30, 2022 and December 31, 2021 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the call date, redeemable Preferred Shares/Preference Units may be redeemed for cash at the option of the Company or the Operating Partnership, respectively, in whole or in part, at a redemption price equal to the liquidation price per share/unit, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares/Preference Units are payable quarterly.
ERPOP [Member]
Class Of Stock [Line Items]
Changes in Issued and Outstanding Common Shares and Units	The following table presents the changes in the Operating Partnership’s issued and outstanding General Partner Units and Limited Partner Units for the six months ended June 30, 2022 and 2021: 2022 2021 General and Limited Partner Units General and Limited Partner Units outstanding at January 1, 388,186,222 386,160,073 Issued to General Partner: Exercise of EQR share options 348,510 833,669 EQR’s Employee Share Purchase Plan (ESPP) 35,669 47,761 EQR’s restricted share grants, net 175,970 87,377 Issued to Limited Partners: Restricted unit grants, net 223,242 155,638 General and Limited Partner Units outstanding at June 30, 388,969,613 387,284,518 Limited Partner Units Limited Partner Units outstanding at January 1, 12,659,027 13,858,073 Limited Partner restricted unit grants, net 223,242 155,638 Conversion of Limited Partner OP Units to EQR Common Shares (31,089 ) (1,084,023 ) Limited Partner Units outstanding at June 30, 12,851,180 12,929,688 Limited Partner Units Ownership Interest in Operating Partnership 3.3 % 3.3 %

Real Estate (Tables)

Real Estate (Tables)	6 Months Ended
	Jun. 30, 2022
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 June 30, 2022 and December 31, 2021 (amounts in thousands): June 30, 2022 December 31, 2021 Land $ 5,733,412 $ 5,814,790 Depreciable property: Buildings and improvements 19,654,296 19,632,284 Furniture, fixtures and equipment 2,271,136 2,220,203 In-Place lease intangibles 517,881 518,324 Projects under development: Land 3,200 — Construction-in-progress 61,961 24,307 Land held for development: Land 46,160 46,160 Construction-in-progress 13,413 16,838 Investment in real estate 28,301,459 28,272,906 Accumulated depreciation (8,740,806 ) (8,354,282 ) Investment in real estate, net $ 19,560,653 $ 19,918,624
Acquired Properties From Unaffiliated Parties	During the six months ended June 30, 2022, the Company acquired the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 1 172 $ 113,000 Total 1 172 $ 113,000 (1) Purchase price includes an allocation of approximately $25.3 million to land and $87.7 million to depreciable property (inclusive of capitalized closing costs).
Disposed Properties to Unaffiliated Parties	During the six months ended June 30, 2022 , the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Rental Properties – Consolidated 1 354 $ 265,650 Total 1 354 $ 265,650

Commitments to Acquire_Dispos_2

Commitments to Acquire/Dispose of Real Estate (Tables)	6 Months Ended
	Jun. 30, 2022
Commitments To Acquire Dispose Of Real Estate [Abstract]
Summary of Separate Agreements to Dispose	The Company has entered into an agreement to dispose of the following (sales price and net book value in thousands): Properties Apartment Units Sales Price Net Book Value at June 30, 2022 Rental Properties - Consolidated 1 136 $ 65,500 $ 41,695 Total 1 136 $ 65,500 $ 41,695

Investments in Partially Owne_2

Investments in Partially Owned Entities (Tables)	6 Months Ended
	Jun. 30, 2022
Investments In Partially Owned Entities [Abstract]
Summary of Company's Consolidated Joint Ventures	The following table summarizes the Company’s consolidated joint ventures as of June 30, 2022: Operating Properties (1) Project Under Development (2) Properties Apartment Units Project Apartment Units Consolidated Joint Ventures (VIE) 15 3,114 1 312 ( 1 ) During the second quarter of 2022, the Company acquired its joint venture partner’s 25% interest in a 432-unit apartment property for $32.2 million, and the property is now wholly owned. ( 2 ) The land under this project is subject to a long-term ground lease.
Summary of Consolidated Assets and Liabilities Related to the VIEs	The following table provides consolidated assets and liabilities related to the VIEs discussed above as of June 30, 2022 and December 31, 2021 (amounts in thousands): June 30, 2022 December 31, 2021 Consolidated Assets $ 660,062 $ 912,955 Consolidated Liabilities $ 127,702 $ 251,424
Summary of Variable Rate Construction Mortgage Debt	The following table and information summarizes the variable rate construction mortgage debt that is non-recourse to the Company at June 30, 2022 (aggregate and amounts borrowed under loan commitments in thousands): Recently Completed Operating Property (1) Project Under Development Number of joint ventures with debt financing 1 1 Aggregate loan commitments $ 67,589 $ 73,344 Amounts borrowed under loan commitments (2) $ 64,856 $ 11,512 Maturity dates 2023 2025 (1) The maturity date of the construction loan was extended on June 24, 2022 to June 25, 2023. ( 2) See Note 9 for the current period proceeds of secured conventional floating rate debt under Mortgage Notes Payable
Summary of Company's Investment in Unconsolidated Entities	The following table and information summarizes the Company’s investments in unconsolidated entities as of June 30, 2022 June 30, 2022 December 31, 2021 Ownership Percentage Investments in Unconsolidated Entities: Various Real Estate Holdings (VIE) (1) $ 36,396 $ 36,024 Varies Development Projects (VIE) (2) 110,657 72,488 62% - 90% (4) Real Estate Technology (VIE) (3) 22,456 19,347 Varies Other (237 ) (411 ) Varies Investments in Unconsolidated Entities $ 169,272 $ 127,448 (1) Represents unconsolidated interests in entities with various real estate holdings. (2) Represents unconsolidated interests in projects under development and land held for development. (3) Represents unconsolidated investments in real estate technology funds/companies. (4) In certain instances, the joint venture agreements contain provisions for promoted interests in favor of our joint venture partner. If the terms of the promoted interest are attained, then our share of the proceeds from a sale or other capital event of the unconsolidated entity may be less than the indicated ownership percentage.
Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs	The following table summarizes the Company’s unconsolidated joint ventures that were deemed to be VIEs as of June 30, 2022: Real Estate Holdings (1) Projects Under Development (2) Land Held for Development (2), (3) Entities Projects Apartment Units (4) Projects Apartment Units (4) Unconsolidated Joint Ventures (VIE) 2 4 1,291 2 640 (1) Represents entities that hold various real estate investments. (2) Represents separate unconsolidated joint ventures for the purpose of developing multifamily rental properties. ( 3 ) Represents separate unconsolidated joint ventures that have not yet started but are expected to start construction in 2022. One parcel is subject to a long-term ground lease. ( 4 ) Represents the intended number of apartment units to be developed.

Restricted Deposits (Tables)

Restricted Deposits (Tables)	6 Months Ended
	Jun. 30, 2022
Deposits Restricted [Abstract]
Restricted Deposits	The following table presents the Company’s restricted deposits as of June 30, 2022 and December 31, 2021 (amounts in thousands): June 30, 2022 December 31, 2021 Mortgage escrow deposits: Replacement reserves $ 11,855 $ 11,156 Mortgage principal reserves/sinking funds 21,752 19,104 Mortgage escrow deposits 33,607 30,260 Restricted cash: Tax-deferred (1031) exchange proceeds — 166,362 Earnest money on pending acquisitions — 2,000 Restricted deposits on real estate investments 242 284 Resident security and utility deposits 37,504 35,663 Other 2,288 1,835 Restricted cash 40,034 206,144 Restricted deposits $ 73,641 $ 236,404

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Summary of Lease Income Types Relating to Lease Payments Along With the Total Other Rental Income	The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the six months ended June 30, 2022 and 2021 (amounts in thousands): Six Months Ended June 30, 2022 Six Months Ended June 30, 2021 Income Type Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential and non-residential rent $ 1,192,048 $ 32,095 $ 1,224,143 $ 1,078,304 $ 31,237 $ 1,109,541 Utility recoveries (RUBS income) (1) 39,583 369 39,952 36,533 330 36,863 Parking rent 21,706 202 21,908 19,890 362 20,252 Other lease revenue (2) (889 ) (197 ) (1,086 ) (18,970 ) 1,138 (17,832 ) Total lease revenue $ 1,252,448 $ 32,469 1,284,917 $ 1,115,757 $ 33,067 1,148,824 Parking revenue 18,431 11,572 Other revenue 37,030 35,265 Total other rental income (3) 55,461 46,837 Rental income $ 1,340,378 $ 1,195,661 (1) RUBS income primarily consists of variable payments representing the recovery of utility costs from residents. (2) Other lease revenue consists of the revenue adjustment related to bad debt and other miscellaneous lease revenue. (3) Other rental income is accounted for under the revenue recognition standard. The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the quarters ended June 30, 2022 and 2021 (amounts in thousands): Quarter Ended June 30, 2022 Quarter Ended June 30, 2021 Income Type Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential and non-residential rent $ 605,158 $ 16,221 $ 621,379 $ 538,649 $ 15,398 $ 554,047 Utility recoveries (RUBS income) (1) 19,985 188 20,173 18,579 152 18,731 Parking rent 10,923 104 11,027 10,156 95 10,251 Other lease revenue (2) 5,412 (154 ) 5,258 (8,708 ) 529 (8,179 ) Total lease revenue $ 641,478 $ 16,359 657,837 $ 558,676 $ 16,174 574,850 Parking revenue 9,623 6,139 Other revenue 19,570 17,070 Total other rental income (3) 29,193 23,209 Rental income $ 687,030 $ 598,059 (1) RUBS income primarily consists of variable payments representing the recovery of utility costs from residents. (2) Other lease revenue consists of the revenue adjustment related to bad debt and other miscellaneous lease revenue. (3) Other rental income is accounted for under the revenue recognition standard.
Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances	The following table presents residential and non-residential accounts receivable and straight-line receivable balances for the Company’s properties as of June 30, 2022 and December 31, 2021 (amounts in thousands): Residential Non-Residential Balance Sheet (Other assets): June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 Resident/tenant accounts receivable balances $ 36,068 $ 37,959 $ 3,444 $ 3,218 Allowance for doubtful accounts (32,358 ) (33,121 ) (2,553 ) (2,365 ) Net receivable balances $ 3,710 (1) $ 4,838 $ 891 $ 853 Straight-line receivable balances $ 4,757 $ 7,460 $ 13,551 $ 13,021 (1) The Company held residential security deposits approximating 62.6% of the net residential receivable balance at June 30, 2022
Summary of Residential Bad Debt for Company's Properties	The following table presents residential bad debt for the Company’s properties for the six months and quarters ended June 30, 2022 and 2021 (amounts in thousands): Six Months Ended June 30, Quarter Ended June 30, Income Statement (Rental income): 2022 2021 2022 2021 Bad debt, net (1) $ 8,147 $ 25,772 $ (1,748 ) $ 12,079 % of rental income 0.6 % 2.2 % (0.3 %) 2.1 % (1) Bad debt, net benefited from additional resident payments due to governmental rental assistance programs of approximately $24.6 million and $14.8 million for the six months and quarter ended June 30, 2022, respectively

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Instrument [Line Items]
Summary of Mortgage Notes Payable Activity	The following table summarizes the Company’s mortgage notes payable activity for the six months ended June 30, 2022 (amounts in thousands): Mortgage notes payable, net as of December 31, 2021 Proceeds Lump sum payoffs Scheduled principal repayments Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Mortgage notes payable, net as of June 30, 2022 Fixed Rate Debt: Secured – Conventional $ 1,896,472 $ — $ (260,874 ) $ (2,985 ) $ 928 $ 714 $ 1,634,255 Floating Rate Debt: Secured – Conventional 59,890 14,586 (2) — — — 148 74,624 Secured – Tax Exempt 234,839 — — — 617 69 235,525 Floating Rate Debt 294,729 14,586 — — 617 217 310,149 Total $ 2,191,201 $ 14,586 $ (260,874 ) $ (2,985 ) $ 1,545 $ 931 $ 1,944,404 (1) Represents amortization of deferred financing costs, net of debt financing costs. (2) See Note 6 for additional discussion of the variable rate construction mortgage debt.
Summary of Notes Activity	The following table summarizes the Company’s notes activity for the six months ended June 30, 2022 (amounts in thousands): Notes, net as of December 31, 2021 Proceeds Lump sum payoffs Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Notes, net as of June 30, 2022 Fixed Rate Debt: Unsecured – Public $ 5,835,222 $ — $ — $ 1,346 $ 2,125 $ 5,838,693 (1) Represents amortization of deferred financing costs, net of debt financing costs.
Schedule of Unsecured Revolving Credit Facility	The following table presents the availability on the Company’s unsecured revolving credit facility as of June 30, 2022 (amounts in thousands): June 30, 2022 Unsecured revolving credit facility commitment $ 2,500,000 Commercial paper balance outstanding (185,037 ) Unsecured revolving credit facility balance outstanding — Other restricted amounts (3,463 ) Unsecured revolving credit facility availability $ 2,311,500
Summary of Debt Extinguishment Costs Recorded as Additional Interest Expense	The following table summarizes the Company’s total debt extinguishment costs recorded as additional interest expense for the six months and quarters ended June 30, 2022 and 2021 (amounts in thousands): Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Write-offs of unamortized deferred financing costs $ 92 $ 264 $ 92 $ — Write-offs of unamortized (premiums)/discounts/OCI 377 — 377 — Total $ 469 $ 264 $ 469 $ —
Mortgages [Member]
Debt Instrument [Line Items]
Summary of Certain Interest Rate and Maturity Date Information	The following table summarizes certain interest rate and maturity date information as of and for the six months ended June 30, 2022: June 30, 2022 Interest Rate Ranges 0.10% - 4.21% Weighted Average Interest Rate 3.37% Maturity Date Ranges 2023-2061
Notes [Member]
Debt Instrument [Line Items]
Summary of Certain Interest Rate and Maturity Date Information	The following table summarizes certain interest rate and maturity date information as of and for the six months ended June 30, 2022: June 30, 2022 Interest Rate Ranges 1.85% - 7.57% Weighted Average Interest Rate 3.60% Maturity Date Ranges 2023-2047

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Summary of Valuations for Each Type of Fair Value Measurement	The following table summarizes the inputs to the valuations for each type of fair value measurement: Fair Value Measurement Type Valuation Inputs Employee holdings (other than Common Shares) within the supplemental executive retirement plan (the “SERP”) Quoted market prices for identical assets. These holdings are included in other assets and other liabilities on the consolidated balance sheets. Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Quoted market price of Common Shares. Mortgage notes payable and private unsecured debt (including its commercial paper and line of credit, if applicable) Indicative rates provided by lenders of similar loans. Public unsecured notes Quoted market prices for each underlying issuance.
Summary of Carrying and Fair Values of Financial Instruments	The June 30, 2022 December 31, 2021 Carrying Value Estimated Fair Value (Level 2) Carrying Value Estimated Fair Value (Level 2) Mortgage notes payable, net $ 1,944,404 $ 1,847,010 $ 2,191,201 $ 2,193,689 Unsecured debt, net 6,023,639 5,693,443 6,150,252 6,798,309 Total debt, net $ 7,968,043 $ 7,540,453 $ 8,341,453 $ 8,991,998
Summarizes Company’s Consolidated Derivative Instruments	The following table summarizes the Company’s consolidated derivative instruments at June 30, 2022 (dollar amounts are in thousands): Forward Starting Swaps (1) Current Notional Balance $ 150,000 Lowest Interest Rate 2.790 % Highest Interest Rate 2.972 % Maturity Date 2033 (1) Forward Starting Swaps – Designed to partially fix interest rates in advance of planned future debt issuances. These swaps have mandatory counterparty terminations in 2024 and are targeted for certain 2023 debt issuances.
Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis	The Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 6/30/2022 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 129,067 $ 129,067 $ — $ — Liabilities Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps Other Liabilities $ 1,259 $ — $ 1,259 $ — Supplemental Executive Retirement Plan Other Liabilities 129,067 129,067 — — Total $ 130,326 $ 129,067 $ 1,259 $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 398,188 $ — $ 398,188 $ — Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2021 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 164,650 $ 164,650 $ — $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 164,650 $ 164,650 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 498,977 $ — $ 498,977 $ —
Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income	The June 30, 2022 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (1,259 ) Interest expense $ (4,881 ) Total $ (1,259 ) $ (4,881 ) June 30, 2021 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ — Interest expense $ (4,637 ) Total $ — $ (4,637 )

Earnings Per Share and Earnin_2

Earnings Per Share and Earnings Per Unit (Tables)	6 Months Ended
	Jun. 30, 2022
Schedule of Calculation of Numerator and Denominator in Earnings Per Share and Earnings Per Unit	The Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Numerator for net income per share – basic: Net income $ 306,476 $ 388,404 $ 232,678 $ 328,040 Allocation to Noncontrolling Interests – Operating Partnership (10,027 ) (13,056 ) (7,633 ) (10,913 ) Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (1,583 ) (1,423 ) (944 ) (741 ) Preferred distributions (1,545 ) (1,545 ) (773 ) (772 ) Numerator for net income per share – basic $ 293,321 $ 372,380 $ 223,328 $ 315,614 Numerator for net income per share – diluted: Net income $ 306,476 $ 388,404 $ 232,678 $ 328,040 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (1,583 ) (1,423 ) (944 ) (741 ) Preferred distributions (1,545 ) (1,545 ) (773 ) (772 ) Numerator for net income per share – diluted $ 303,348 $ 385,436 $ 230,961 $ 326,527 Denominator for net income per share – basic and diluted: Denominator for net income per share – basic 375,640 373,050 375,769 373,812 Effect of dilutive securities: OP Units 11,891 12,544 11,895 12,044 Long-term compensation shares/units 1,863 1,773 1,698 1,964 ATM forward sales 69 — 1 — Denominator for net income per share – diluted 389,463 387,367 389,363 387,820 Net income per share – basic $ 0.78 $ 1.00 $ 0.59 $ 0.84 Net income per share – diluted $ 0.78 $ 1.00 $ 0.59 $ 0.84
ERPOP [Member]
Schedule of Calculation of Numerator and Denominator in Earnings 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): Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Numerator for net income per Unit – basic and diluted: Net income $ 306,476 $ 388,404 $ 232,678 $ 328,040 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (1,583 ) (1,423 ) (944 ) (741 ) Allocation to Preference Units (1,545 ) (1,545 ) (773 ) (772 ) Numerator for net income per Unit – basic and diluted $ 303,348 $ 385,436 $ 230,961 $ 326,527 Denominator for net income per Unit – basic and diluted: Denominator for net income per Unit – basic 387,531 385,594 387,664 385,856 Effect of dilutive securities: Dilution for Units issuable upon assumed exercise/vesting of the Company’s long-term compensation shares/units 1,863 1,773 1,698 1,964 ATM forward sales 69 — 1 — Denominator for net income per Unit – diluted 389,463 387,367 389,363 387,820 Net income per Unit – basic $ 0.78 $ 1.00 $ 0.59 $ 0.84 Net income per Unit – diluted $ 0.78 $ 1.00 $ 0.59 $ 0.84

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2022
Commitments And Contingencies Disclosure [Abstract]
Summary of Real Estate Development Commitments	The following table summarizes the gross remaining total project costs for the Company’s projects under development at June 30, 2022 (total project costs remaining in thousands): Projects Apartment Units Total Project Costs Remaining (1) Projects Under Development Consolidated 2 537 $ 195,487 Unconsolidated 4 1,291 291,066 Total Projects Under Development 6 1,828 $ 486,553 (1) The

Reportable Segments (Tables)

Reportable Segments (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Schedule of Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations	The Six Months Ended June 30, Quarter Ended June 30, 2022 2021 2022 2021 Rental income $ 1,340,378 $ 1,195,661 $ 687,030 $ 598,059 Property and maintenance expense (241,229 ) (224,800 ) (116,355 ) (107,746 ) Real estate taxes and insurance expense (202,538 ) (200,871 ) (101,850 ) (97,401 ) Total operating expenses (443,767 ) (425,671 ) (218,205 ) (205,147 ) Net operating income $ 896,611 $ 769,990 $ 468,825 $ 392,912
Schedule of NOI from Our Rental Real Estate for Each Segment Specific to Continuing Operations	The following tables present NOI from our rental real estate for each segment for the six months and quarters ended June 30, 2022 and 2021, respectively, as well as total assets and capital expenditures at June 30, 2022 (amounts in thousands): Six Months Ended June 30, 2022 Six Months Ended June 30, 2021 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 241,119 $ 72,466 $ 168,653 $ 213,291 $ 70,202 $ 143,089 Orange County 60,018 12,805 47,213 52,510 12,411 40,099 San Diego 42,410 9,555 32,855 37,928 9,176 28,752 Subtotal - Southern California 343,547 94,826 248,721 303,729 91,789 211,940 San Francisco 206,018 61,588 144,430 188,762 59,386 129,376 Washington D.C. 203,494 68,073 135,421 194,911 64,309 130,602 New York 218,855 99,705 119,150 188,676 98,235 90,441 Seattle 137,255 38,837 98,418 126,450 40,434 86,016 Boston 127,660 39,881 87,779 115,089 38,077 77,012 Denver 21,404 5,939 15,465 18,920 5,532 13,388 Total same store 1,258,233 408,849 849,384 1,136,537 397,762 738,775 Non-same store/other Non-same store (2) 77,019 31,614 45,405 5,186 2,299 2,887 Other (3) 5,126 3,304 1,822 53,938 25,610 28,328 Total non-same store/other 82,145 34,918 47,227 59,124 27,909 31,215 Totals $ 1,340,378 $ 443,767 $ 896,611 $ 1,195,661 $ 425,671 $ 769,990 (1) For the six months ended June 30, 2022 and 2021, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2021, less properties subsequently sold, which represented 74,057 apartment (2) For the six months ended June 30, 2022 and 2021, non-same store primarily includes properties acquired after January 1, 2021, plus any properties in lease-up and not stabilized as of January 1, (3) Other includes development, other corporate operations and operations prior to disposition for properties sold. Quarter Ended June 30, 2022 Quarter Ended June 30, 2021 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 125,767 $ 35,692 $ 90,075 $ 106,873 $ 34,509 $ 72,364 Orange County 31,252 6,381 24,871 26,669 6,096 20,573 San Diego 21,470 4,626 16,844 19,188 4,543 14,645 Subtotal - Southern California 178,489 46,699 131,790 152,730 45,148 107,582 San Francisco 105,402 30,050 75,352 93,784 28,982 64,802 Washington D.C. 103,022 34,172 68,850 97,423 31,701 65,722 New York 112,865 48,559 64,306 94,473 48,258 46,215 Seattle 70,128 19,512 50,616 62,603 19,999 42,604 Boston 65,066 19,443 45,623 57,777 18,530 39,247 Denver 10,825 2,930 7,895 9,575 2,710 6,865 Total same store 645,797 201,365 444,432 568,365 195,328 373,037 Non-same store/other Non-same store (2) 40,501 15,646 24,855 3,436 1,660 1,776 Other (3) 732 1,194 (462 ) 26,258 8,159 18,099 Total non-same store/other 41,233 16,840 24,393 29,694 9,819 19,875 Totals $ 687,030 $ 218,205 $ 468,825 $ 598,059 $ 205,147 $ 392,912 (1) For the quarters ended June 30, 2022 and 2021, same store primarily includes all properties acquired or completed that were stabilized prior to April 1, 2021, less properties subsequently sold, which represented 74,057 apartment (2) For the quarters ended June 30, 2022 and 2021, non-same store primarily includes properties acquired after April 1, 2021, plus any properties in lease-up and not stabilized as of April 1, (3) Other includes development, other corporate operations and operations prior to disposition for properties sold. Six Months Ended June 30, 2022 Total Assets Capital Expenditures Same store (1) Los Angeles $ 2,748,850 $ 14,728 Orange County 362,679 2,643 San Diego 228,219 1,828 Subtotal - Southern California 3,339,748 19,199 San Francisco 3,114,937 13,003 Washington D.C. 3,120,459 13,391 New York 3,700,473 12,422 Seattle 2,106,727 8,761 Boston 1,708,006 9,799 Denver 482,417 562 Total same store 17,572,767 77,137 Non-same store/other Non-same store (2) 2,421,668 6,053 Other (3) 579,910 114 Total non-same store/other 3,001,578 6,167 Totals $ 20,574,345 $ 83,304 (1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2021, less properties subsequently sold, which represented 74,057 apartment (2) Non-same store primarily includes properties acquired after January 1, 2021, plus any properties in lease-up and not stabilized as of January 1, (3) Other includes development, other corporate operations and capital expenditures for properties

Business - Additional Informati

Business - Additional Information (Details)	Jun. 30, 2022 State Property ApartmentUnit
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of states in which entity operates | State	10
Properties | Property	310
Apartment units | ApartmentUnit	80,227
ERPOP [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Noncontrolling interest, ownership percentage by parent	96.70%

Business - Ownership Breakdown

Business - Ownership Breakdown (Details)	Jun. 30, 2022 Property ApartmentUnit
Property/Unit schedule
Properties | Property	310
Apartment Units | ApartmentUnit	80,227
Wholly Owned Properties
Property/Unit schedule
Properties | Property	295
Apartment Units | ApartmentUnit	77,113
Partially Owned Properties - Consolidated
Property/Unit schedule
Properties | Property	15
Apartment Units | ApartmentUnit	3,114

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Provision for income tax	$ 291,000	$ 242,000	$ 573,000	$ 395,000
Federal [Member]
Provision for income tax			$ 0

Equity, Capital and Other Int_3

Equity, Capital and Other Interests - Changes in Company's Issued and Outstanding Common Shares and Units (Details) - shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	375,527,195	372,302,000
Common Shares Issued:
Conversion of OP Units	31,089	1,084,023
Exercise of share options	348,510	833,669
Employee Share Purchase Plan (ESPP)	35,669	47,761
Restricted share grants, net	175,970	87,377
Common Stock, Shares, Outstanding	376,118,433	374,354,830
Units
Total Units Outstanding	12,659,027	13,858,073
Restricted unit grants, net	223,242	155,638
Conversion of OP Units to Common Shares	(31,089)	(1,084,023)
Total Units Outstanding	12,851,180	12,929,688
Common Shares And Units Outstanding	388,969,613	387,284,518
Units Ownership Interest in Operating Partnership	3.30%	3.30%

Equity, Capital and Other Int_4

Equity, Capital and Other Interests - Changes in Operating Partnership's Issued and Outstanding General Partner Units and Limited Partner Units (Details) - shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
General and Limited Partner Units
Exercise of share options	348,510	833,669
Employee Share Purchase Plan (ESPP)	35,669	47,761
Restricted share grants, net	175,970	87,377
Restricted unit grants, net	223,242	155,638
Common Shares And Units Outstanding	388,969,613	387,284,518
Limited Partner Units
Total Units Outstanding	12,659,027	13,858,073
Restricted unit grants, net	223,242	155,638
Conversion of Limited Partner OP Units to EQR Common Shares	(31,089)	(1,084,023)
Total Units Outstanding	12,851,180	12,929,688
Units Ownership Interest in Operating Partnership	3.30%	3.30%
ERPOP [Member]
General and Limited Partner Units
Common Shares And Units Outstanding	388,186,222	386,160,073
Exercise of share options	348,510	833,669
Employee Share Purchase Plan (ESPP)	35,669	47,761
Restricted share grants, net	175,970	87,377
Restricted unit grants, net	223,242	155,638
Common Shares And Units Outstanding	388,969,613	387,284,518
Limited Partner Units
Total Units Outstanding	12,659,027	13,858,073
Restricted unit grants, net	223,242	155,638
Conversion of Limited Partner OP Units to EQR Common Shares	(31,089)	(1,084,023)
Total Units Outstanding	12,851,180	12,929,688
Units Ownership Interest in Operating Partnership	3.30%	3.30%

Equity, Capital and Other Int_5

Equity, Capital and Other Interests - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Equity Capital And Other Interests [Abstract]
Redeemable noncontrolling interests - operating partnership	$ 398,188	$ 498,977	$ 440,123	$ 338,951
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, par or stated value per share	$ 0.01	$ 0.01

Equity, Capital and Other Int_6

Equity, Capital and Other Interests - Changes in Redemption Value of Redeemable Noncontrolling Interests - Operating Partnership (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Equity Capital And Other Interests [Abstract]
Redeemable Noncontrolling Interests - Operating Partnership Units	$ 498,977	$ 338,951
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership	(98,140)	101,966
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(2,649)	(794)
Redeemable Noncontrolling Interests - Operating Partnership Units	$ 398,188	$ 440,123

Equity, Capital and Other Int_7

Equity, Capital and Other Interests - Changes in Redemption Value of Redeemable Limited Partners Interest (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Equity Capital And Other Interests [Abstract]
Redeemable Limited Partners	$ 498,977	$ 338,951
Limited Partners Change In Redemption Value	(98,140)	101,966
Limited Partners Change In Carrying Value	(2,649)	(794)
Redeemable Limited Partners	$ 398,188	$ 440,123

Equity, Capital and Other Int_8

Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Details) - ERPOP [Member] - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Class Of Stock [Line Items]
8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of June 30, 2022 and December 31, 2021	$ 37,280	$ 37,280
Preferred Stock
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 Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of June 30, 2022 and December 31, 2021	$ 37,280	$ 37,280

Equity, Capital and Other Int_9

Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Parenthetical) (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
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
Preferred Stock
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	$ 50	$ 50
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%

Equity, Capital and Other In_10

Equity, Capital and Other Interests - Other - Additional Information (Details) - $ / shares	101 Months Ended	174 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Common Stock, Shares, Issued	376,118,433	376,118,433	375,527,195
Stock repurchase program, number of shares authorized to be repurchased	13,000,000	13,000,000
Stock open market repurchased and retired during period, shares	0	0
Stock repurchase program, remaining number of shares authorized to be repurchased	13,000,000	13,000,000
Forward Sales Agreements [Member]
Settlement of shares under forward sales agreement	0	0
Forward Sales Agreements [Member] | ATM Share Offering [Member]
Weighted average initial forward price per share	$ 83.25	$ 83.25
Forward Sales Agreements [Member] | ATM Share Offering [Member] | Prior Program [Member]
Common Stock, Shares, Issued	1,700,000	1,700,000
Forward Sales Agreements [Member] | ATM Share Offering [Member] | New Program [Member]
Common shares available for issuance	13,000,000	13,000,000

Real Estate - Summary of Carryi

Real Estate - Summary of Carrying Amounts of Investment in Real Estate (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Land	$ 5,733,412	$ 5,814,790
Depreciable property:
Buildings and improvements	19,654,296	19,632,284
Furniture, fixtures and equipment	2,271,136	2,220,203
In-Place lease intangibles	517,881	518,324
Projects under development:
Projects under development	65,161	24,307
Land held for development:
Land held for development	59,573	62,998
Investment in real estate	28,301,459	28,272,906
Accumulated depreciation	(8,740,806)	(8,354,282)
Investment in real estate, net	19,560,653	19,918,624
Land [Member]
Projects under development:
Projects under development	3,200
Land held for development:
Land held for development	46,160	46,160
Construction-in-progress [Member]
Projects under development:
Projects under development	61,961	24,307
Land held for development:
Land held for development	$ 13,413	$ 16,838

Real Estate - Acquired Properti

Real Estate - Acquired Properties From Unaffiliated Parties (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) Property ApartmentUnit
Properties acquired | Property	1
Property Units acquired | ApartmentUnit	172
Purchase Price | $	$ 113,000
Rental Properties - Consolidated [Member]
Properties acquired | Property	1
Property Units acquired | ApartmentUnit	172
Purchase Price | $	$ 113,000

Real Estate - Acquired Proper_2

Real Estate - Acquired Properties From Unaffiliated Parties (Parenthetical) (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Purchase price	$ 113,000
Land [Member]
Purchase price	25,300
Depreciable Property [Member]
Purchase price	$ 87,700

Real Estate - Disposed Properti

Real Estate - Disposed Properties to Unaffiliated Parties (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) Property ApartmentUnit
Properties disposed | Property	1
Property Units disposed | ApartmentUnit	354
Sales Price | $	$ 265,650
Rental Properties - Consolidated [Member]
Properties disposed | Property	1
Property Units disposed | ApartmentUnit	354
Sales Price | $	$ 265,650

Real Estate - Additional Inform

Real Estate - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Real Estate [Abstract]
Net gain (loss) on sales of real estate properties	$ 107,897	$ 223,738	$ 107,795	$ 223,695

Commitments to Acquire_Dispos_3

Commitments to Acquire/Dispose of Real Estate - Summary of Separate Agreements to Dispose (Details) $ in Thousands	Jun. 30, 2022 USD ($) Property ApartmentUnit
Property/Unit schedule
Properties | Property	1
Apartment Units | ApartmentUnit	136
Sales Price	$ 65,500
Net Book Value at June 30, 2022	$ 41,695
Rental Properties - Consolidated [Member] | Wholly Owned Properties [Member]
Property/Unit schedule
Properties | Property	1
Apartment Units | ApartmentUnit	136
Sales Price	$ 65,500
Net Book Value at June 30, 2022	$ 41,695

Investments in Partially Owne_3

Investments in Partially Owned Entities - Summary of Company's Consolidated Joint Ventures (Details)	Jun. 30, 2022 Property ApartmentUnit Project
Variable Interest Entity [Line Items]
Properties | Property	310
Apartment units	80,227
Consolidated VIE [Member] | Operating Properties [Member]
Variable Interest Entity [Line Items]
Properties | Property	15
Apartment units	3,114
Consolidated VIE [Member] | Project Under Development [Member]
Variable Interest Entity [Line Items]
Apartment units	312
Project | Project	1

Investments in Partially Owne_4

Investments in Partially Owned Entities - Summary of Company's Consolidated Joint Ventures (Parenthetical) (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) ApartmentUnit	Jun. 30, 2022 ApartmentUnit
Variable Interest Entity [Line Items]
Property Units acquired | ApartmentUnit		172
Consolidated VIE [Member]
Variable Interest Entity [Line Items]
Percentage interest in consolidated operating property	25%
Property Units acquired | ApartmentUnit	432
Payments to acquired interest in consolidated operating property	$ 32,200,000
Consolidated VIE [Member] | Noncontrolling Interests [Member]
Variable Interest Entity [Line Items]
Payments to acquired interest in consolidated operating property	4,800,000
Partially owned property reduced amount	0
Consolidated VIE [Member] | Paid in Capital/General Partner Capital [Member]
Variable Interest Entity [Line Items]
Payments to acquired interest in consolidated operating property	$ 27,400,000

Investments in Partially Owne_5

Investments in Partially Owned Entities - Summary of Consolidated Assets and Liabilities Related to the VIEs (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Consolidated Assets	$ 20,574,345	$ 21,169,241
Consolidated Liabilities	9,071,476	9,483,056
Consolidated VIE [Member]
Variable Interest Entity [Line Items]
Consolidated Assets	660,062	912,955
Consolidated Liabilities	$ 127,702	$ 251,424

Investments in Partially Owne_6

Investments in Partially Owned Entities - Summary of Variable Rate Construction Mortgage Debt (Details) - Consolidated VIE [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) JointVenture
Recently Completed Operating Property [Member]
Variable Interest Entity [Line Items]
Number of joint ventures with debt financing | JointVenture	1
Aggregate loan commitments	$ 67,589
Amounts borrowed under loan commitments	$ 64,856
Maturity dates	2023
Project Under Development [Member]
Variable Interest Entity [Line Items]
Number of joint ventures with debt financing | JointVenture	1
Aggregate loan commitments	$ 73,344
Amounts borrowed under loan commitments	$ 11,512
Maturity dates	2025

Investments in Partially Owne_7

Investments in Partially Owned Entities - Summary of Company's Investment in Unconsolidated Entities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 169,272	$ 127,448
Various Real Estate Holdings [Member] | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	36,396	36,024
Development Projects [Member] | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 110,657	72,488
Development Projects [Member] | Variable Interest Entity, Not Primary Beneficiary | Minimum [Member]
Variable Interest Entity [Line Items]
Ownership Percentage	62%
Development Projects [Member] | Variable Interest Entity, Not Primary Beneficiary | Maximum [Member]
Variable Interest Entity [Line Items]
Ownership Percentage	90%
Real Estate Technology [Member] | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 22,456	19,347
Other [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ (237)	$ (411)

Investments in Partially Owne_8

Investments in Partially Owned Entities - Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs (Details)	Jun. 30, 2022 ApartmentUnit Project Entity
Variable Interest Entity [Line Items]
Apartment units	80,227
Variable Interest Entity, Not Primary Beneficiary | Real Estate Holdings [Member]
Variable Interest Entity [Line Items]
Entities | Entity	2
Variable Interest Entity, Not Primary Beneficiary | Projects Under Development [Member]
Variable Interest Entity [Line Items]
Project | Project	4
Apartment units	1,291
Variable Interest Entity, Not Primary Beneficiary | Land Held For Development [Member]
Variable Interest Entity [Line Items]
Project | Project	2
Apartment units	640

Investments in Partially Owne_9

Investments in Partially Owned Entities - Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs (Parenthetical) (Details)	Jun. 30, 2022 Land
Land Held For Development [Member]
Variable Interest Entity [Line Items]
Number of land parcel subject to long-term ground lease	1

Restricted Deposits - Restricte

Restricted Deposits - Restricted Deposits (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Mortgage escrow deposits:
Replacement reserves	$ 11,855	$ 11,156
Mortgage principal reserves/sinking funds	21,752	19,104
Mortgage escrow deposits	33,607	30,260
Restricted cash:
Tax-deferred (1031) exchange proceeds		166,362
Earnest money on pending acquisitions		2,000
Restricted deposits on real estate investments	242	284
Resident security and utility deposits	37,504	35,663
Other	2,288	1,835
Restricted cash	40,034	206,144
Restricted deposits	$ 73,641	$ 236,404	$ 353,009

Leases - Additional Information

Leases - Additional Information (Details)	6 Months Ended
	Jun. 30, 2022
Residential Apartment Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	97%
Residential Apartment Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	12 months
Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	3%
Non-residential Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	10 years
Non-residential Leases [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Retail leases term	5 years

Leases - Summary of Lease Incom

Leases - Summary of Lease Income Types Relating to Lease Payments Along With the Total Other Rental Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Leased Assets [Line Items]
Total lease revenue	$ 657,837	$ 574,850	$ 1,284,917	$ 1,148,824
Rental income	687,030	598,059	1,340,378	1,195,661
Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	641,478	558,676	1,252,448	1,115,757
Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	16,359	16,174	32,469	33,067
Residential and Non-Residential Rent [Member]
Operating Leased Assets [Line Items]
Total lease revenue	621,379	554,047	1,224,143	1,109,541
Residential and Non-Residential Rent [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	605,158	538,649	1,192,048	1,078,304
Residential and Non-Residential Rent [Member] | Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	16,221	15,398	32,095	31,237
Utility Recoveries (RUBS Income) [Member]
Operating Leased Assets [Line Items]
Total lease revenue	20,173	18,731	39,952	36,863
Utility Recoveries (RUBS Income) [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	19,985	18,579	39,583	36,533
Utility Recoveries (RUBS Income) [Member] | Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	188	152	369	330
Parking Rent [Member]
Operating Leased Assets [Line Items]
Total lease revenue	11,027	10,251	21,908	20,252
Parking Rent [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	10,923	10,156	21,706	19,890
Parking Rent [Member] | Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	104	95	202	362
Other Lease Revenue [Member]
Operating Leased Assets [Line Items]
Total lease revenue	5,258	(8,179)	(1,086)	(17,832)
Other Lease Revenue [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	5,412	(8,708)	(889)	(18,970)
Other Lease Revenue [Member] | Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	(154)	529	(197)	1,138
Parking Revenue
Operating Leased Assets [Line Items]
Rental income	9,623	6,139	18,431	11,572
Other Revenue
Operating Leased Assets [Line Items]
Rental income	19,570	17,070	37,030	35,265
Other Rental Income [Member]
Operating Leased Assets [Line Items]
Rental income	$ 29,193	$ 23,209	$ 55,461	$ 46,837

Leases - Summary of Residential

Leases - Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances (Details) - Other Assets [Member] - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Residential Leases [Member]
Operating Leased Assets [Line Items]
Resident/tenant accounts receivable balances	$ 36,068	$ 37,959
Allowance for doubtful accounts	(32,358)	(33,121)
Net receivable balances	3,710	4,838
Straight-line receivable balances	4,757	7,460
Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Resident/tenant accounts receivable balances	3,444	3,218
Allowance for doubtful accounts	(2,553)	(2,365)
Net receivable balances	891	853
Straight-line receivable balances	$ 13,551	$ 13,021

Leases - Summary of Residenti_2

Leases - Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances (Parenthetical) (Details)	Jun. 30, 2022
Leases [Abstract]
Holding percentage of residential security deposits of net receivable	62.60%

Leases - Summary of Residenti_3

Leases - Summary of Residential Bad Debt for Company's Properties (Details) - Residential Leases [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessor Lease Description [Line Items]
Bad debt, net	$ (1,748)	$ 12,079	$ 8,147	$ 25,772
% of rental income	(0.30%)	2.10%	0.60%	2.20%

Leases - Summary of Residenti_4

Leases - Summary of Residential Bad Debt for Company's Properties (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Leases [Abstract]
Bad debt, net from resident payments	$ 14.8	$ 24.6

Debt - Mortgage Notes Payable -

Debt - Mortgage Notes Payable - Summary of Mortgage Notes Payable Activity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Mortgage notes payable, net beginning balance	$ 2,191,201
Proceeds	14,586	$ 47,759
Lump sum payoffs	(260,874)	(59,880)
Scheduled principal repayments	(2,985)
Amortization of premiums/ discounts	1,545	$ 1,374
Amortization of deferred financing costs, net	931
Mortgage notes payable, net ending balance	1,944,404
Fixed Rate Debt [Member] | Secured - Conventional [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net beginning balance	1,896,472
Lump sum payoffs	(260,874)
Scheduled principal repayments	(2,985)
Amortization of premiums/ discounts	928
Amortization of deferred financing costs, net	714
Mortgage notes payable, net ending balance	1,634,255
Floating Rate Debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net beginning balance	294,729
Proceeds	14,586
Amortization of premiums/ discounts	617
Amortization of deferred financing costs, net	217
Mortgage notes payable, net ending balance	310,149
Floating Rate Debt [Member] | Secured - Conventional [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net beginning balance	59,890
Proceeds	14,586
Amortization of deferred financing costs, net	148
Mortgage notes payable, net ending balance	74,624
Floating Rate Debt [Member] | Secured - Tax Exempt [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net beginning balance	234,839
Amortization of premiums/ discounts	617
Amortization of deferred financing costs, net	69
Mortgage notes payable, net ending balance	$ 235,525

Debt - Mortgage Notes Payable_2

Debt - Mortgage Notes Payable - Summary of Certain Interest Rate and Maturity Date Information (Details) - Mortgages [Member]	6 Months Ended
	Jun. 30, 2022
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.37%
Maturity Date Ranges, Start	2023
Maturity Date Ranges, End	2061
Minimum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	0.10%
Maximum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	4.21%

Debt - Mortgage Notes Payable_3

Debt - Mortgage Notes Payable - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Mortgage notes payable	$ 1,944,404	$ 2,191,201
Credit Enhanced Debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable	$ 250,000

Debt - Notes - Summary of Notes

Debt - Notes - Summary of Notes Activity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Notes, net beginning balance	$ 5,835,222
Amortization of premiums/ discounts	1,346	$ 1,219
Notes, net ending balance	5,838,693
Fixed Rate Debt [Member] | Unsecured - Public [Member]
Debt Instrument [Line Items]
Notes, net beginning balance	5,835,222
Amortization of premiums/ discounts	1,346
Amortization of deferred financing costs, net	2,125
Notes, net ending balance	$ 5,838,693

Debt - Notes - Summary of Certa

Debt - Notes - Summary of Certain Interest Rate and Maturity Date Information (Details) - Notes [Member]	6 Months Ended
	Jun. 30, 2022
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.60%
Maturity Date Ranges, Start	2023
Maturity Date Ranges, End	2047
Minimum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	1.85%
Maximum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	7.57%

Debt - Line of Credit and Comme

Debt - Line of Credit and Commercial Paper - Additional Information (Details)	6 Months Ended
	Jun. 30, 2022 USD ($)
Line of Credit Facility [Line Items]
Debt instrument, maturity date	Nov. 01, 2024
Commercial paper balance outstanding	$ 1,000,000,000
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Weighted average interest rates	0.60%
Commercial paper weighted average days outstanding	12 days
Weighted average amount outstanding	$ 186,700,000
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	2,500,000,000
Ability to increase LOC facility	$ 750,000,000
Debt instrument, basis spread on variable rate	0.775%
Percentage points of line of credit facility commitment fee	0.125%
Revolving credit facility	$ 0
Commercial paper balance outstanding	$ 185,037,000

Debt - Line of Credit and Com_2

Debt - Line of Credit and Commercial Paper - Schedule of Unsecured Revolving Credit Facility (Details)	6 Months Ended
	Jun. 30, 2022 USD ($)
Line of Credit Facility [Line Items]
Commercial paper balance outstanding	$ (1,000,000,000)
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility commitment	2,500,000,000
Commercial paper balance outstanding	(185,037,000)
Unsecured revolving credit facility balance outstanding	0
Other restricted amounts	(3,463,000)
Unsecured revolving credit facility availability	$ 2,311,500,000

Debt - Other - Summary of Debt

Debt - Other - Summary of Debt Extinguishment Costs Recorded as Additional Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Write-offs of unamortized deferred financing costs	$ 92	$ 92	$ 264
Write-offs of unamortized (premiums)/discounts/OCI	377	377
Total	$ 469	$ 469	$ 264

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Valuations for Each Type of Fair Value Measurement (Details)	6 Months Ended
	Jun. 30, 2022
Employee Holdings Within The Supplemental Executive Retirement Plan
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Employee holdings (other than Common Shares) within the supplemental executive retirement plan (the “SERP”)
Valuation Inputs	Quoted market prices for identical assets. These holdings are included in other assets and other liabilities on the consolidated balance sheets.
Redeemable Noncontrolling Interests Operating Partnership Redeemable Limited Partners
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners
Valuation Inputs	Quoted market price of Common Shares.
Mortgage Notes Payable And Private Unsecured Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Mortgage notes payable and private unsecured debt (including its commercial paper and line of credit, if applicable)
Valuation Inputs	Indicative rates provided by lenders of similar loans.
Public Unsecured Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Public unsecured notes
Valuation Inputs	Quoted market prices for each underlying issuance.

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	$ 7,968,043	$ 8,341,453
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	7,540,453	8,991,998
Mortgage Notes Payable, Net [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	1,944,404	2,191,201
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	1,847,010	2,193,689
Unsecured Debt [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	6,023,639	6,150,252
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	$ 5,693,443	$ 6,798,309

Fair Value Measurements - Sum_3

Fair Value Measurements - Summarizes Company's Consolidated Derivative Instruments (Details) - Forward Starting Swaps [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Derivatives Fair Value [Line Items]
Current Notional Balance	$ 150,000
Maturity Date	2033
Minimum [Member]
Derivatives Fair Value [Line Items]
Interest Rate	2.79%
Maximum [Member]
Derivatives Fair Value [Line Items]
Interest Rate	2.972%

Fair Value Measurements - Sum_4

Fair Value Measurements - Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Derivatives Fair Value [Line Items]
Fair Value Of SERP Investments	$ 129,067	$ 164,650
Other Liabilities, Fair Value Disclosure	129,067	164,650
Total	130,326
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	398,188	498,977	$ 440,123	$ 338,951
Forward Starting Swaps [Member]
Derivatives Fair Value [Line Items]
Other Liabilities, Fair Value Disclosure	1,259
Fair Value, Inputs, Level 1 [Member]
Derivatives Fair Value [Line Items]
Fair Value Of SERP Investments	129,067	164,650
Other Liabilities, Fair Value Disclosure	129,067	164,650
Total	129,067
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	0	0
Fair Value, Inputs, Level 1 [Member] | Forward Starting Swaps [Member]
Derivatives Fair Value [Line Items]
Other Liabilities, Fair Value Disclosure	0
Fair Value, Inputs, Level 2 [Member]
Derivatives Fair Value [Line Items]
Fair Value Of SERP Investments	0	0
Other Liabilities, Fair Value Disclosure	0	0
Total	1,259
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	398,188	498,977
Fair Value, Inputs, Level 2 [Member] | Forward Starting Swaps [Member]
Derivatives Fair Value [Line Items]
Other Liabilities, Fair Value Disclosure	1,259
Fair Value, Inputs, Level 3 [Member]
Derivatives Fair Value [Line Items]
Fair Value Of SERP Investments	0	0
Other Liabilities, Fair Value Disclosure	0	0
Total	0
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	0	$ 0
Fair Value, Inputs, Level 3 [Member] | Forward Starting Swaps [Member]
Derivatives Fair Value [Line Items]
Other Liabilities, Fair Value Disclosure	$ 0

Fair Value Measurements - Sum_5

Fair Value Measurements - Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI on Derivative	$ (1,259)	$ 0
Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	(4,881)	(4,637)
Forward Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI on Derivative	(1,259)	0
Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	$ (4,881)	$ (4,637)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Derivative Instrument Detail [Abstract]
Unrealized gain (loss) on interest rate cash flow hedges, pretax, accumulated other comprehensive income (loss)	$ 30.6	$ 34.3
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	$ 8.9

Earnings Per Share and Earnin_3

Earnings 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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 232,678	$ 328,040	$ 306,476	$ 388,404
Allocation to Noncontrolling Interests – Operating Partnership	(7,633)	(10,913)	(10,027)	(13,056)
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(944)	(741)	(1,583)	(1,423)
Preferred distributions	(773)	(772)	(1,545)	(1,545)
Net income available to Common Shares	223,328	315,614	293,321	372,380
Numerator for net income per share – diluted	$ 230,961	$ 326,527	$ 303,348	$ 385,436
Weighted average Common Shares outstanding	375,769	373,812	375,640	373,050
OP Units	11,895	12,044	11,891	12,544
Dilutive Securities Options	1,698	1,964	1,863	1,773
ATM forward sales	1		69
Denominator for net income per share – diluted	389,363	387,820	389,463	387,367
Net income per share – basic	$ 0.59	$ 0.84	$ 0.78	$ 1
Net income per share – diluted	$ 0.59	$ 0.84	$ 0.78	$ 1

Earnings Per Share and Earnin_4

Earnings 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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income	$ 232,678	$ 328,040	$ 306,476	$ 388,404
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	$ (944)	$ (741)	$ (1,583)	$ (1,423)
Dilutive Securities Options	1,698	1,964	1,863	1,773
ATM forward sales	1		69
Denominator for net income per share – diluted	389,363	387,820	389,463	387,367
Net income per Unit – basic	$ 0.59	$ 0.84	$ 0.78	$ 1
Net income per Unit – diluted	$ 0.59	$ 0.84	$ 0.78	$ 1
ERPOP [Member]
Net income	$ 232,678	$ 328,040	$ 306,476	$ 388,404
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(944)	(741)	(1,583)	(1,423)
Allocation to Preference Units	(773)	(772)	(1,545)	(1,545)
Numerator for net income per Unit – basic and diluted	$ 230,961	$ 326,527	$ 303,348	$ 385,436
Denominator for net income per Unit – basic	387,664	385,856	387,531	385,594
Dilutive Securities Options	1,698	1,964	1,863	1,773
ATM forward sales	1	0	69	0
Denominator for net income per share – diluted	389,363	387,820	389,463	387,367
Net income per Unit – basic	$ 0.59	$ 0.84	$ 0.78	$ 1
Net income per Unit – diluted	$ 0.59	$ 0.84	$ 0.78	$ 1

Commitments and Contingencies -

Commitments and Contingencies - Summary of Real Estate Development Commitments (Details) $ in Thousands	Jun. 30, 2022 USD ($) Project Apartment
Projects Under Development Consolidated [Member]
Projects/Investments/Units/Remaining Commitments schedule
Number of consolidated apartment units in various stages of development | Apartment	537
Consolidated project under development commitment fund | $	$ 195,487
Number of consolidated projects in various stages of development | Project	2
Projects Under Development Unconsolidated [Member]
Projects/Investments/Units/Remaining Commitments schedule
Number of unconsolidated apartment units in various stages of development | Apartment	1,291
Unconsolidated project under development commitment fund | $	$ 291,066
Number of unconsolidated projects in various stages of development | Project	4
Projects Under Development [Member]
Projects/Investments/Units/Remaining Commitments schedule
Apartment Units | Apartment	1,828
Project under development commitment fund | $	$ 486,553
Number of projects in various stages of development | Project	6

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Real Estate Development Commitments (Parenthetical) (Details) $ in Millions	Jun. 30, 2022 USD ($)
Projects/Investments/Units/Remaining Commitments schedule
Total project costs remaining under development commitment fund	$ 486.6
Parent
Projects/Investments/Units/Remaining Commitments schedule
Total project costs remaining under development commitment fund	161.1
Corporate Joint Venture
Projects/Investments/Units/Remaining Commitments schedule
Total project costs remaining under development commitment fund	6.3
Construction Loans
Projects/Investments/Units/Remaining Commitments schedule
Total project costs remaining under development commitment fund	$ 319.2

Commitments and Contingencies_3

Commitments and Contingencies - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) Investment
Commitments And Contingencies [Abstract]
Number of real estate technology investment funds	8
Number of other real estate investment funds	1
Real estate technology and other real estate investments commitment funds | $	$ 24.7

Reportable Segments - Additiona

Reportable Segments - Additional Information (Details) - Customer	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Number of customer contributed 10% or more of total revenue	0	0
Non-residential Leases [Member] | Revenue [Member] | Revenue Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	3.80%

Reportable Segments - Reconcili

Reportable Segments - Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	$ 687,030	$ 598,059	$ 1,340,378	$ 1,195,661
Property and maintenance expense	(116,355)	(107,746)	(241,229)	(224,800)
Real estate taxes and insurance expense	(101,850)	(97,401)	(202,538)	(200,871)
Operating income	309,934	376,844	459,672	512,404
Same Store, Non-same Store and Other
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	687,030	598,059	1,340,378	1,195,661
Property and maintenance expense	(116,355)	(107,746)	(241,229)	(224,800)
Real estate taxes and insurance expense	(101,850)	(97,401)	(202,538)	(200,871)
Total operating expenses	(218,205)	(205,147)	(443,767)	(425,671)
Operating income	$ 468,825	$ 392,912	$ 896,611	$ 769,990

Reportable Segments - NOI from

Reportable Segments - NOI from Our Rental Real Estate for Each Segment Specific to Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Rental income	$ 687,030	$ 598,059	$ 1,340,378	$ 1,195,661
Operating income	309,934	376,844	459,672	512,404
Total Assets	20,574,345		20,574,345		$ 21,169,241
Same Store
Segment Reporting Information [Line Items]
Rental income	645,797	568,365	1,258,233	1,136,537
Operating expenses	201,365	195,328	408,849	397,762
Operating income	444,432	373,037	849,384	738,775
Total Assets	17,572,767		17,572,767
Capital Expenditures			77,137
Non-same store/other
Segment Reporting Information [Line Items]
Rental income	41,233	29,694	82,145	59,124
Operating expenses	16,840	9,819	34,918	27,909
Operating income	24,393	19,875	47,227	31,215
Total Assets	3,001,578		3,001,578
Capital Expenditures			6,167
Same Store, Non-same Store and Other
Segment Reporting Information [Line Items]
Rental income	687,030	598,059	1,340,378	1,195,661
Operating expenses	218,205	205,147	443,767	425,671
Operating income	468,825	392,912	896,611	769,990
Total Assets	20,574,345		20,574,345
Capital Expenditures			83,304
Los Angeles | Same Store
Segment Reporting Information [Line Items]
Rental income	125,767	106,873	241,119	213,291
Operating expenses	35,692	34,509	72,466	70,202
Operating income	90,075	72,364	168,653	143,089
Total Assets	2,748,850		2,748,850
Capital Expenditures			14,728
Orange County | Same Store
Segment Reporting Information [Line Items]
Rental income	31,252	26,669	60,018	52,510
Operating expenses	6,381	6,096	12,805	12,411
Operating income	24,871	20,573	47,213	40,099
Total Assets	362,679		362,679
Capital Expenditures			2,643
San Diego | Same Store
Segment Reporting Information [Line Items]
Rental income	21,470	19,188	42,410	37,928
Operating expenses	4,626	4,543	9,555	9,176
Operating income	16,844	14,645	32,855	28,752
Total Assets	228,219		228,219
Capital Expenditures			1,828
Subtotal - Southern California | Same Store
Segment Reporting Information [Line Items]
Rental income	178,489	152,730	343,547	303,729
Operating expenses	46,699	45,148	94,826	91,789
Operating income	131,790	107,582	248,721	211,940
Total Assets	3,339,748		3,339,748
Capital Expenditures			19,199
San Francisco | Same Store
Segment Reporting Information [Line Items]
Rental income	105,402	93,784	206,018	188,762
Operating expenses	30,050	28,982	61,588	59,386
Operating income	75,352	64,802	144,430	129,376
Total Assets	3,114,937		3,114,937
Capital Expenditures			13,003
Washington D.C. | Same Store
Segment Reporting Information [Line Items]
Rental income	103,022	97,423	203,494	194,911
Operating expenses	34,172	31,701	68,073	64,309
Operating income	68,850	65,722	135,421	130,602
Total Assets	3,120,459		3,120,459
Capital Expenditures			13,391
New York | Same Store
Segment Reporting Information [Line Items]
Rental income	112,865	94,473	218,855	188,676
Operating expenses	48,559	48,258	99,705	98,235
Operating income	64,306	46,215	119,150	90,441
Total Assets	3,700,473		3,700,473
Capital Expenditures			12,422
Seattle | Same Store
Segment Reporting Information [Line Items]
Rental income	70,128	62,603	137,255	126,450
Operating expenses	19,512	19,999	38,837	40,434
Operating income	50,616	42,604	98,418	86,016
Total Assets	2,106,727		2,106,727
Capital Expenditures			8,761
Boston | Same Store
Segment Reporting Information [Line Items]
Rental income	65,066	57,777	127,660	115,089
Operating expenses	19,443	18,530	39,881	38,077
Operating income	45,623	39,247	87,779	77,012
Total Assets	1,708,006		1,708,006
Capital Expenditures			9,799
Denver | Same Store
Segment Reporting Information [Line Items]
Rental income	10,825	9,575	21,404	18,920
Operating expenses	2,930	2,710	5,939	5,532
Operating income	7,895	6,865	15,465	13,388
Total Assets	482,417		482,417
Capital Expenditures			562
Non-same store | Non-same store/other
Segment Reporting Information [Line Items]
Rental income	40,501	3,436	77,019	5,186
Operating expenses	15,646	1,660	31,614	2,299
Operating income	24,855	1,776	45,405	2,887
Total Assets	2,421,668		2,421,668
Capital Expenditures			6,053
Other | Non-same store/other
Segment Reporting Information [Line Items]
Rental income	732	26,258	5,126	53,938
Operating expenses	1,194	8,159	3,304	25,610
Operating income	(462)	$ 18,099	1,822	$ 28,328
Total Assets	$ 579,910		579,910
Capital Expenditures			$ 114

Reportable Segments - NOI fro_2

Reportable Segments - NOI from Our Rental Real Estate for Each Segment Specific to Continuing Operations (Parenthetical) (Details) - Property	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Disclosure Of Entitys Reportable Segments [Abstract]
Units in same store properties	74,057	74,057	74,057	74,057

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) $ in Millions		6 Months Ended
	Jul. 01, 2022 USD ($) Property ApartmentUnit	Jun. 30, 2022
Subsequent Event [Line Items]
Debt instrument, redemption, description		The redemption is expected to occur in the third quarter of 2022 and will be funded from disposition proceeds
Subsequent Events [Member]
Subsequent Event [Line Items]
Number of properties disposed | Property	1
Number of property units disposed | ApartmentUnit	455
Sales Price	$ 415
Forward starting swaps to hedge changes in interest rates	200
Subsequent Events [Member] | Unsecured Notes Due In 2023 [Member]
Subsequent Event [Line Items]
Debt instrument redemption, principal amount	$ 500