Equity Residential (EQR) 10-K 27 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 21, 2014	Jun. 30, 2013
Entity Registrant Name	'EQUITY RESIDENTIAL	'	'
Entity Central Index Key	'0000906107	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$20,500,000,000
Entity Common Stock, Shares Outstanding	'	361,079,202	'
OPERATING PARTNERSHIP	'	'	'
Entity Registrant Name	'ERP OPERATING LIMITED PARTNERSHIP	'	'
Entity Central Index Key	'0000931182	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Non-accelerated Filer	'	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investment in real estate	'	'
Land	$6,192,512	$4,554,912
Depreciable property	19,226,047	15,711,944
Projects under development	988,867	387,750
Land held for development	393,522	353,823
Real Estate Investment Property, at Cost	26,800,948	21,008,429
Real Estate Investment Property, Accumulated Depreciation	-4,807,709	-4,912,221
Investment in real estate, net	21,993,239	16,096,208
Cash and cash equivalents	53,534	612,590
Investments in unconsolidated entities	178,526	17,877
Deposits - restricted	103,567	250,442
Escrow deposits - mortgage	42,636	9,129
Deferred financing costs, net	58,486	44,382
Other assets	404,557	170,372
Total assets	22,834,545	17,201,000
Liabilities:	'	'
Mortgage notes payable	5,174,166	3,898,369
Notes, net	5,477,088	4,630,875
Lines of credit	115,000	0
Accounts payable and accrued expenses	118,791	38,372
Accrued interest payable	78,309	76,223
Other liabilities	347,748	304,518
Security deposits	71,592	66,988
Distributions payable	243,511	260,176
Total liabilities	11,626,205	9,275,521
Redeemable Noncontrolling Interests - Operating Partnership	363,144	398,372
Shareholders' equity:	'	'
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,000,000 shares issued and outstanding as of December 31, 2013 and December 31, 2012	50,000	50,000
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 360,479,260 shares issued and outstanding as of December 31, 2013 and 325,054,654 shares issued and outstanding as of December 31, 2012	3,605	3,251
Paid in capital	8,561,500	6,542,355
Retained earnings	2,047,258	887,355
Accumulated other comprehensive (loss)	-155,162	-193,148
Total shareholders' equity	10,507,201	7,289,813
Noncontrolling Interests:	'	'
Operating Partnership	211,412	159,606
Partially Owned Properties	126,583	77,688
Total Noncontrolling Interests	337,995	237,294
Total equity	10,845,196	7,527,107
Total liabilities and equity	$22,834,545	$17,201,000

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Shareholders' equity:	'	'
Preferred Shares of beneficial interest, par value	$0.01	$0.01
Preferred Shares of beneficial interest, shares authorized	100,000,000	100,000,000
Preferred Shares of beneficial interest, shares issued	1,000,000	1,000,000
Preferred Shares of beneficial interest, shares outstanding	1,000,000	1,000,000
Common Shares of beneficial interest, par value	$0.01	$0.01
Common Shares of beneficial interest, shares authorized	1,000,000,000	1,000,000,000
Common Shares of beneficial interest, shares issued	360,479,260	325,054,654
Common Shares of beneficial interest, shares outstanding	360,479,260	325,054,654

CONSOLIDATED_BALANCE_SHEETS_OF

CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (USD $)	Dec. 31, 2013	Dec. 31, 2012
Investment in real estate	'	'
Land	$6,192,512,000	$4,554,912,000
Depreciable property	19,226,047,000	15,711,944,000
Projects under development	988,867,000	387,750,000
Land held for development	393,522,000	353,823,000
Real Estate Investment Property, at Cost	26,800,948,000	21,008,429,000
Real Estate Investment Property, Accumulated Depreciation	-4,807,709,000	-4,912,221,000
Investment in real estate, net	21,993,239,000	16,096,208,000
Cash and cash equivalents	53,534,000	612,590,000
Investments in unconsolidated entities	178,526,000	17,877,000
Deposits - restricted	103,567,000	250,442,000
Escrow deposits - mortgage	42,636,000	9,129,000
Deferred financing costs, net	58,486,000	44,382,000
Other assets	404,557,000	170,372,000
Total assets	22,834,545,000	17,201,000,000
Liabilities:	'	'
Mortgage notes payable	5,174,166,000	3,898,369,000
Notes, net	5,477,088,000	4,630,875,000
Lines of credit	115,000,000	0
Accounts payable and accrued expenses	118,791,000	38,372,000
Accrued interest payable	78,309,000	76,223,000
Other liabilities	347,748,000	304,518,000
Security deposits	71,592,000	66,988,000
Distributions payable	243,511,000	260,176,000
Total liabilities	11,626,205,000	9,275,521,000
Partners' Capital:	'	'
Accumulated other comprehensive (loss)	-155,162,000	-193,148,000
Noncontrolling Interests - Partially Owned Properties	126,583,000	77,688,000
Total liabilities and equity	22,834,545,000	17,201,000,000
OPERATING PARTNERSHIP	'	'
Investment in real estate	'	'
Land	6,192,512,000	4,554,912,000
Depreciable property	19,226,047,000	15,711,944,000
Projects under development	988,867,000	387,750,000
Land held for development	393,522,000	353,823,000
Real Estate Investment Property, at Cost	26,800,948,000	21,008,429,000
Real Estate Investment Property, Accumulated Depreciation	-4,807,709,000	-4,912,221,000
Investment in real estate, net	21,993,239,000	16,096,208,000
Cash and cash equivalents	53,534,000	612,590,000
Investments in unconsolidated entities	178,526,000	17,877,000
Deposits - restricted	103,567,000	250,442,000
Escrow deposits - mortgage	42,636,000	9,129,000
Deferred financing costs, net	58,486,000	44,382,000
Other assets	404,557,000	170,372,000
Total assets	22,834,545,000	17,201,000,000
Liabilities:	'	'
Mortgage notes payable	5,174,166,000	3,898,369,000
Notes, net	5,477,088,000	4,630,875,000
Lines of credit	115,000,000	0
Accounts payable and accrued expenses	118,791,000	38,372,000
Accrued interest payable	78,309,000	76,223,000
Other liabilities	347,748,000	304,518,000
Security deposits	71,592,000	66,988,000
Distributions payable	243,511,000	260,176,000
Total liabilities	11,626,205,000	9,275,521,000
Redeemable Limited Partners	363,144,000	398,372,000
Partners' Capital:	'	'
Preference Units	50,000,000	50,000,000
General Partner	10,612,363,000	7,432,961,000
Limited Partners	211,412,000	159,606,000
Accumulated other comprehensive (loss)	-155,162,000	-193,148,000
Total partners' capital	10,718,613,000	7,449,419,000
Noncontrolling Interests - Partially Owned Properties	126,583,000	77,688,000
Total capital	10,845,196,000	7,527,107,000
Total liabilities and equity	$22,834,545,000	$17,201,000,000

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Proceeds from Sale of Available-for-sale Securities	$4,878	$0	$4,537
REVENUES	'	'	'
Rental income	2,378,004	1,737,929	1,516,194
Fee and asset management	9,698	9,573	9,026
Total revenues	2,387,702	1,747,502	1,525,220
EXPENSES	'	'	'
Property and maintenance	449,461	332,190	304,380
Real estate taxes and insurance	293,999	206,723	178,406
Property management	84,342	81,902	81,867
Fee and asset management	6,460	4,663	4,279
Depreciation	978,973	560,669	506,175
General and administrative	62,179	47,233	43,604
Total expenses	1,875,414	1,233,380	1,118,711
Operating income	512,288	514,122	406,509
Interest and other income	4,656	150,546	7,963
Other expenses	-9,105	-21,692	-12,400
Merger Expenses	-19,864	-5,619	-1,736
Interest:	'	'	'
Expense incurred, net	-586,854	-455,236	-460,172
Amortization of deferred financing costs	-22,197	-21,295	-16,616
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations	-121,076	160,826	-76,452
Income and other tax (expense) benefit	-1,169	-514	-706
(Loss) from investments in unconsolidated entities due to operations	-4,159	-14	0
(Loss) from investments in unconsolidated entities due to merger expenses	-54,004	0	0
Net gain on sales of unconsolidated entities	7	0	0
Net gain on sales of land parcels	12,227	0	4,217
(Loss) income from continuing operations	-168,174	160,298	-72,941
Discontinued operations, net	2,073,527	720,906	1,008,138
Net income	1,905,353	881,204	935,197
Net (income) loss attributable to Noncontrolling Interests:	'	'	'
Net (income) Loss Attributable to Noncontrolling Interest	-75,278	-38,641	-40,780
Net loss (income) attributable to Noncontrolling Interests - Partially Owned Properties	538	-844	-832
Net income attributable to controlling interests	1,830,613	841,719	893,585
Preferred distributions	-4,145	-10,355	-13,865
Redemption Premium	0	-5,152	0
Net income available to Common Shares	$1,826,468	$826,212	$879,720
Earnings per share - basic:	'	'	'
(Loss) income from continuing operations available to Common Shares	($0.47)	$0.45	($0.28)
Net Income per share - basis	$5.16	$2.73	$2.98
Weighted average Common Shares outstanding	354,305	302,701	294,856
Earnings per share - diluted:	'	'	'
(Loss) income from Continuing Operations, Per Diluted Share	($0.47)	$0.45	($0.28)
Net income per share - diluted	$5.16	$2.71	$2.98
Weighted average Common Shares outstanding	354,305	319,766	294,856

CONSOLIDATED_STATEMENTS_OF_OPE1

CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (USD $)	12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES	'	'	'
Rental income	$2,378,004,000	$1,737,929,000	$1,516,194,000
Fee and asset management	9,698,000	9,573,000	9,026,000
Total revenues	2,387,702,000	1,747,502,000	1,525,220,000
EXPENSES	'	'	'
Property and maintenance	449,461,000	332,190,000	304,380,000
Real estate taxes and insurance	293,999,000	206,723,000	178,406,000
Property management	84,342,000	81,902,000	81,867,000
Fee and asset management	6,460,000	4,663,000	4,279,000
Depreciation	978,973,000	560,669,000	506,175,000
General and administrative	62,179,000	47,233,000	43,604,000
Total expenses	1,875,414,000	1,233,380,000	1,118,711,000
Operating income	512,288,000	514,122,000	406,509,000
Interest and other income	4,656,000	150,546,000	7,963,000
Other expenses	-9,105,000	-21,692,000	-12,400,000
Merger Expenses	-19,864,000	-5,619,000	-1,736,000
Interest:	'	'	'
Expense incurred, net	-586,854,000	-455,236,000	-460,172,000
Amortization of deferred financing costs	-22,197,000	-21,295,000	-16,616,000
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations	-121,076,000	160,826,000	-76,452,000
Income and other tax (expense) benefit	-1,169,000	-514,000	-706,000
(Loss) from investments in unconsolidated entities due to operations	-4,159,000	-14,000	0
(Loss) from investments in unconsolidated entities due to merger expenses	-54,004,000	0	0
Net gain on sales of unconsolidated entities	7,000	0	0
Net gain on sales of land parcels	12,227,000	0	4,217,000
(Loss) income from continuing operations	-168,174,000	160,298,000	-72,941,000
Discontinued operations, net	2,073,527,000	720,906,000	1,008,138,000
Net income	1,905,353,000	881,204,000	935,197,000
Net loss (income) attributable to Noncontrolling Interests - Partially Owned Properties	538,000	-844,000	-832,000
Net income attributable to controlling interests	1,830,613,000	841,719,000	893,585,000
ALLOCATION OF NET INCOME:	'	'	'
Redemption Premium	0	5,152,000	0
Earnings per Unit - basic:	'	'	'
(Loss) income from continuing operations available to Common Shares	($0.47)	$0.45	($0.28)
Net income available to Units	$5.16	$2.73	$2.98
Earnings per Unit - diluted:	'	'	'
(Loss) income from Continuing Operations, Per Diluted Share	($0.47)	$0.45	($0.28)
Net income available to Units	$5.16	$2.71	$2.98
OPERATING PARTNERSHIP	'	'	'
REVENUES	'	'	'
Rental income	2,378,004,000	1,737,929,000	1,516,194,000
Fee and asset management	9,698,000	9,573,000	9,026,000
Total revenues	2,387,702,000	1,747,502,000	1,525,220,000
EXPENSES	'	'	'
Property and maintenance	449,461,000	332,190,000	304,380,000
Real estate taxes and insurance	293,999,000	206,723,000	178,406,000
Property management	84,342,000	81,902,000	81,867,000
Fee and asset management	6,460,000	4,663,000	4,279,000
Depreciation	978,973,000	560,669,000	506,175,000
General and administrative	62,179,000	47,233,000	43,604,000
Total expenses	1,875,414,000	1,233,380,000	1,118,711,000
Operating income	512,288,000	514,122,000	406,509,000
Interest and other income	4,656,000	150,546,000	7,963,000
Other expenses	-9,105,000	-21,692,000	-12,400,000
Merger Expenses	-19,864,000	-5,619,000	-1,736,000
Interest:	'	'	'
Expense incurred, net	-586,854,000	-455,236,000	-460,172,000
Amortization of deferred financing costs	-22,197,000	-21,295,000	-16,616,000
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations	-121,076,000	160,826,000	-76,452,000
Income and other tax (expense) benefit	-1,169,000	-514,000	-706,000
(Loss) from investments in unconsolidated entities due to operations	-4,159,000	-14,000	0
(Loss) from investments in unconsolidated entities due to merger expenses	-54,004,000	0	0
Net gain on sales of unconsolidated entities	7,000	0	0
Net gain on sales of land parcels	12,227,000	0	4,217,000
(Loss) income from continuing operations	-168,174,000	160,298,000	-72,941,000
Discontinued operations, net	2,073,527,000	720,906,000	1,008,138,000
Net income	1,905,353,000	881,204,000	935,197,000
Net loss (income) attributable to Noncontrolling Interests - Partially Owned Properties	538,000	-844,000	-832,000
Net income attributable to controlling interests	1,905,891,000	880,360,000	934,365,000
ALLOCATION OF NET INCOME:	'	'	'
Preference Units	4,145,000	10,355,000	13,865,000
Redemption Premium	0	5,152,000	0
General Partner	1,826,468,000	826,212,000	879,720,000
Limited Partners	75,278,000	38,641,000	40,780,000
Net income available to Units	$1,901,746,000	$864,853,000	$920,500,000
Earnings per Unit - basic:	'	'	'
(Loss) income from continuing operations available to Common Shares	($0.47)	$0.45	($0.28)
Net income available to Units	$5.16	$2.73	$2.98
Weighted average Units outstanding	368,038	316,554	308,062
Earnings per Unit - diluted:	'	'	'
(Loss) income from Continuing Operations, Per Diluted Share	($0.47)	$0.45	($0.28)
Net income available to Units	$5.16	$2.71	$2.98
Weighted average Units outstanding	368,038	319,766	308,062

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]	'	'	'
Net income	$1,905,353	$881,204	$935,197
Other comprehensive income (loss) - derivative instruments:	'	'	'
Unrealized holding gains (losses) arising during the year	18,771	-11,772	-143,598
Losses reclassified into earnings from other comprehensive income	20,141	14,678	4,343
Other comprehensive income (loss) - other instruments:	'	'	'
Unrealized holding gains arising during the year	583	664	355
Gain on Sale of Securities, Net	-2,122	0	0
Other comprehensive income b foreign currency:	'	'	'
Currency translation adjustments arising during the year	613	0	0
Other comprehensive income (loss)	37,986	3,570	-138,900
Comprehensive income	1,943,339	884,774	796,297
Comprehensive (income) attributable to Noncontrolling Interests	-74,740	-39,485	-41,612
Comprehensive income attributable to controlling interests	$1,868,599	$845,289	$754,685

CONSOLIDATED_STATEMENTS_OF_COM1

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive income:	'	'	'
Net income	$1,905,353	$881,204	$935,197
Other comprehensive income (loss) - derivative instruments:	'	'	'
Unrealized holding gains (losses) arising during the year	18,771	-11,772	-143,598
Losses reclassified into earnings from other comprehensive income	20,141	14,678	4,343
Other comprehensive income (loss) - other instruments:	'	'	'
Unrealized holding gains arising during the year	583	664	355
Gain on Sale of Securities, Net	-2,122	0	0
Other comprehensive income b foreign currency:	'	'	'
Currency translation adjustments arising during the year	613	0	0
Other comprehensive income (loss)	37,986	3,570	-138,900
Comprehensive income	1,943,339	884,774	796,297
Comprehensive (income) attributable to Noncontrolling Interests	-74,740	-39,485	-41,612
Comprehensive income attributable to controlling interests	1,868,599	845,289	754,685
OPERATING PARTNERSHIP	'	'	'
Comprehensive income:	'	'	'
Net income	1,905,353	881,204	935,197
Other comprehensive income (loss) - derivative instruments:	'	'	'
Unrealized holding gains (losses) arising during the year	18,771	-11,772	-143,598
Losses reclassified into earnings from other comprehensive income	20,141	14,678	4,343
Other comprehensive income (loss) - other instruments:	'	'	'
Unrealized holding gains arising during the year	583	664	355
Gain on Sale of Securities, Net	-2,122	0	0
Other comprehensive income b foreign currency:	'	'	'
Currency translation adjustments arising during the year	613	0	0
Other comprehensive income (loss)	37,986	3,570	-138,900
Comprehensive income	1,943,339	884,774	796,297
Comprehensive (income) attributable to Noncontrolling Interests	538	-844	-832
Comprehensive income attributable to controlling interests	$1,943,877	$883,930	$795,465

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net income	$1,905,353,000	$881,204,000	$935,197,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation	1,013,353,000	684,992,000	663,616,000
Amortization of deferred financing costs	22,425,000	21,435,000	17,846,000
Amortization of above/below market leases	898,000	0	0
Amortization of discounts and premiums on debt	-156,439,000	-8,181,000	-1,478,000
Amortization of deferred settlements on derivative instruments	19,607,000	14,144,000	3,808,000
Write-off of pursuit costs	5,184,000	9,056,000	5,075,000
Loss from Investments in Unconsolidated Entities Adjustment	58,163,000	14,000	0
Distributions from unconsolidated entities - return on capital	2,481,000	575,000	319,000
Net (Gain) on Sales of Investment Securities/Technology Investments	-4,203,000	0	-4,537,000
Net (gain) on sales of unconsolidated entities	-7,000	0	0
Net (gain) loss on sales of land parcels	-12,227,000	0	-4,217,000
Net (gain) on sales of discontinued operations	-2,036,505,000	-548,278,000	-826,489,000
Unrealized loss (gain) on derivative instruments	70,000	-1,000	186,000
Compensation paid with Company Common Shares	35,474,000	24,832,000	21,177,000
Changes in assets and liabilities:	'	'	'
Decrease (increase) in deposits - restricted	3,684,000	-4,091,000	4,523,000
Decrease in mortgage deposits	1,813,000	176,000	2,133,000
Decrease (increase) in other assets	3,742,000	-20,411,000	-2,743,000
Increase (decrease) in accounts payable and accrued expenses	6,229,000	-2,102,000	332,000
(Decrease) in accrued interest payable	-9,219,000	-11,898,000	-10,510,000
Increase (decrease) in other liabilities	15,401,000	2,987,000	-8,245,000
(Decrease) increase in security deposits	-6,361,000	1,702,000	4,474,000
Net cash provided by operating activities	868,916,000	1,046,155,000	800,467,000
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Acquisition of Archstone, net of cash acquired	-4,000,875,000	0	0
Investment in real estate - acquisitions	-108,308,000	-843,976,000	-1,441,599,000
Investment in real estate - development/other	-377,442,000	-180,409,000	-120,741,000
Improvements to real estate	-135,816,000	-152,828,000	-144,452,000
Additions to non-real estate property	-4,134,000	-8,821,000	-7,110,000
Interest capitalized for real estate and unconsolidated entities under development	-47,321,000	-22,509,000	-9,108,000
Proceeds from disposition of real estate, net	4,551,454,000	1,049,219,000	1,500,583,000
Investments in unconsolidated entities	-66,471,000	-5,291,000	-2,021,000
Distributions from unconsolidated entities b return of capital	25,471,000	0	0
Proceeds from Sale of Available-for-sale Securities	4,878,000	0	4,537,000
Decrease (increase) in deposits on real estate acquisitions and investments, net	143,694,000	-97,984,000	7,631,000
Decrease (increase) in mortgage deposits	7,893,000	1,444,000	-479,000
Deconsolidation of previously consolidated properties	0	0	28,360,000
Acquisition of Noncontrolling Interests - Partially Owned Properties	0	-13,000	-12,809,000
Net cash (used for) provided by investing activities	-6,977,000	-261,168,000	-197,208,000
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Loan and bond acquisition costs	-16,526,000	-21,209,000	-20,421,000
Mortgage Deposits Financing Activities	-5,631,000	-57,000	247,000
Mortgage notes payable:	'	'	'
Proceeds from Issuance of Long-term Debt	902,886,000	26,495,000	190,905,000
Restricted cash	0	2,370,000	16,596,000
Lump sum payoffs	-2,532,682,000	-350,247,000	-974,956,000
Scheduled principal repayments	-12,658,000	-14,088,000	-16,726,000
Notes, net:	'	'	'
Proceeds	1,245,550,000	0	996,190,000
Lump sum payoffs	-400,000,000	-975,991,000	-575,641,000
Lines of credit:	'	'	'
Proceeds	9,832,000,000	5,876,000,000	1,455,000,000
Repayments	-9,717,000,000	-5,876,000,000	-1,455,000,000
(Payments on) proceeds from settlement of derivative instruments	-44,063,000	0	-147,306,000
Proceeds from sale of Common Shares	0	1,417,040,000	173,484,000
Proceeds from Employee Share Purchase Plan (ESPP)	3,401,000	5,399,000	5,262,000
Proceeds from exercise of options	17,252,000	49,039,000	95,322,000
Payments for Repurchase of Preferred Stock and Preference Stock	0	-150,000,000	0
Premium on Redemption of Preferred Shares Cash	0	-23,000	0
Payment of offering costs	-1,047,000	-39,359,000	-3,596,000
Other financing activities, net	-48,000	-48,000	-48,000
Contributions - Noncontrolling Interests - Partially Owned Properties	27,660,000	8,221,000	75,911,000
Contributions - Noncontrolling Interests - Operating Partnership	5,000	5,000	0
Distributions:	'	'	'
Common Shares	-681,610,000	-473,451,000	-432,023,000
Preferred Shares	-4,145,000	-13,416,000	-12,829,000
Noncontrolling Interests b Operating Partnership	-27,897,000	-21,915,000	-20,002,000
Noncontrolling Interests - Partially Owned Properties	-6,442,000	-5,083,000	-1,115,000
Net cash (used for) provided by financing activities	-1,420,995,000	-556,318,000	-650,746,000
Net (decrease) increase in cash and cash equivalents	-559,056,000	228,669,000	-47,487,000
Cash and cash equivalents, beginning of year	612,590,000	383,921,000	431,408,000
Cash and cash equivalents, end of year	53,534,000	612,590,000	383,921,000
SUPPLEMENTAL INFORMATION:	'	'	'
Cash paid for interest, net of amounts capitalized	722,861,000	464,937,000	477,434,000
Net cash (received) paid for income and other taxes	1,152,000	673,000	645,000
Real estate acquisitions/dispositions/other:	'	'	'
Mortgage loans assumed	0	137,644,000	158,240,000
Valuation of OP Units issued	0	66,606,000	0
Amortization of deferred financing costs:	'	'	'
Amortization Of Deferred Financing Costs Investment In Real Estate Net	-152,000	0	0
Amortization Of Deferred Financing Costs Deferred Financing Costs Net	22,577,000	21,435,000	17,846,000
Amortization of discounts and premiums on debt:	'	'	'
Mortgage notes payable	-158,625,000	-10,333,000	-8,260,000
Notes, net	2,186,000	2,152,000	6,782,000
Amortization of deferred settlements on derivative instruments:	'	'	'
Other liabilities	-534,000	-534,000	-535,000
Accumulated other comprehensive income	20,141,000	14,678,000	4,343,000
Loss From Investments In Unconsolidated Entities [Abstract]	'	'	'
Income Loss From Equity Method Investments Merger	53,073,000	14,000	0
Other Liabilities Loss From Investments in Unconsolidated Entities Merger	5,090,000	0	0
Unrealized loss (gain) on derivative instruments:	'	'	'
Other assets	-17,139,000	7,448,000	6,826,000
Mortgage notes payable	0	-2,589,000	-612,000
Notes, net	-1,523,000	-4,860,000	-2,937,000
Other liabilities	-39,000	11,772,000	140,507,000
Accumulated other comprehensive (loss) income	18,771,000	-11,772,000	-143,598,000
Acquisition of Archstone, net of cash acquired [Abstract]	'	'	'
Acquisition of Archstone Investment in Real Estate Net	-8,687,355,000	0	0
Acquisition of Archstone Investments in Unconsolidated Entities	-225,568,000	0	0
Acquisition of Archstone Deposits Restricted	-528,000	0	0
Acquisition of Archstone Escrow Deposits Mortgage	-37,582,000	0	0
Acquisition of Archstone Deferred Financing Costs	-25,780,000	0	0
Acquisition of Archstone Other Assets	-215,622,000	0	0
Acquisition of Archstone Mortgage Notes Payable	3,076,876,000	0	0
Acquisition of Archstone Accounts Payable and Accrued Liabilities	16,984,000	0	0
Acqusition of Archstone Interest Payable	11,305,000	0	0
Acquisition of Archstone Other Liabilities	117,299,000	0	0
Acquisition of Archstone Security Deposits	10,965,000	0	0
Acquisition of Archstone Common Shares Issued	1,929,868,000	0	0
Acquisition of Archstone Noncontrolling Interests Partially Owned Properties	28,263,000	0	0
Interest capitalized for real estate and unconsolidated entities under development:	'	'	'
Investment in real estate, net	-45,533,000	-21,661,000	-8,785,000
Investments in unconsolidated entities	-1,788,000	-848,000	-323,000
Investments in unconsolidated entities [Abstract]	'	'	'
Investments in unconsolidated entities	-13,656,000	-5,291,000	-2,021,000
Investments in unconsolidated entities other liabilities	-52,815,000	0	0
Deconsolidation of previously consolidated properties:	'	'	'
Investment in real estate, net	0	0	35,495,000
Investments in unconsolidated entities	0	0	-7,135,000
(Payments on) proceeds from settlement of derivative instruments:	'	'	'
Proceeds From Payments On Settlement Of Derivative Instruments Other Assets	-50,000	0	0
Other liabilities	-44,013,000	0	-147,306,000
Other:	'	'	'
Receivable on sale of Common Shares	0	28,457,000	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	-613,000	0	0
Partnership Interest [Member]	'	'	'
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net income	1,905,353,000	881,204,000	935,197,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation	1,013,353,000	684,992,000	663,616,000
Amortization of deferred financing costs	22,425,000	21,435,000	17,846,000
Amortization of above/below market leases	898,000	0	0
Amortization of discounts and premiums on debt	-156,439,000	-8,181,000	-1,478,000
Amortization of deferred settlements on derivative instruments	19,607,000	14,144,000	3,808,000
Write-off of pursuit costs	5,184,000	9,056,000	5,075,000
Loss from Investments in Unconsolidated Entities Adjustment	-58,163,000	-14,000	0
Distributions from unconsolidated entities - return on capital	2,481,000	575,000	319,000
Net (Gain) on Sales of Investment Securities/Technology Investments	-4,203,000	0	-4,537,000
Net (gain) on sales of unconsolidated entities	-7,000	0	0
Net (gain) on sales of discontinued operations	-2,036,505,000	-548,278,000	-826,489,000
Unrealized loss (gain) on derivative instruments	70,000	-1,000	186,000
Compensation paid with Company Common Shares	35,474,000	24,832,000	21,177,000
Changes in assets and liabilities:	'	'	'
Decrease (increase) in deposits - restricted	3,684,000	-4,091,000	4,523,000
Decrease in mortgage deposits	-1,813,000	-176,000	-2,133,000
Decrease (increase) in other assets	3,742,000	-20,411,000	-2,743,000
Increase (decrease) in accounts payable and accrued expenses	6,229,000	-2,102,000	332,000
(Decrease) in accrued interest payable	-9,219,000	-11,898,000	-10,510,000
Increase (decrease) in other liabilities	15,401,000	2,987,000	-8,245,000
(Decrease) increase in security deposits	-6,361,000	1,702,000	4,474,000
Net cash provided by operating activities	868,916,000	1,046,155,000	800,467,000
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Acquisition of Archstone, net of cash acquired	-4,000,875,000	0	0
Investment in real estate - acquisitions	-108,308,000	-843,976,000	-1,441,599,000
Investment in real estate - development/other	-377,442,000	-180,409,000	-120,741,000
Improvements to real estate	-135,816,000	-152,828,000	-144,452,000
Additions to non-real estate property	-4,134,000	-8,821,000	-7,110,000
Interest capitalized for real estate and unconsolidated entities under development	-47,321,000	-22,509,000	-9,108,000
Proceeds from disposition of real estate, net	4,551,454,000	1,049,219,000	1,500,583,000
Investments in unconsolidated entities	66,471,000	5,291,000	2,021,000
Distributions from unconsolidated entities b return of capital	25,471,000	0	0
Proceeds from Sale of Available-for-sale Securities	-4,878,000	0	-4,537,000
Decrease (increase) in deposits on real estate acquisitions and investments, net	143,694,000	-97,984,000	7,631,000
Decrease (increase) in mortgage deposits	7,893,000	1,444,000	-479,000
Deconsolidation of previously consolidated properties	0	0	28,360,000
Acquisition of Noncontrolling Interests - Partially Owned Properties	0	-13,000	-12,809,000
Net cash (used for) provided by investing activities	-6,977,000	-261,168,000	-197,208,000
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Loan and bond acquisition costs	-16,526,000	-21,209,000	-20,421,000
Mortgage Deposits Financing Activities	-5,631,000	-57,000	247,000
Mortgage notes payable:	'	'	'
Proceeds from Issuance of Long-term Debt	902,886,000	26,495,000	190,905,000
Restricted cash	0	2,370,000	16,596,000
Lump sum payoffs	-2,532,682,000	-350,247,000	-974,956,000
Scheduled principal repayments	-12,658,000	-14,088,000	-16,726,000
Notes, net:	'	'	'
Proceeds	1,245,550,000	0	996,190,000
Lump sum payoffs	400,000,000	975,991,000	575,641,000
Lines of credit:	'	'	'
Proceeds	9,832,000,000	5,876,000,000	1,455,000,000
Repayments	-9,717,000,000	-5,876,000,000	-1,455,000,000
(Payments on) proceeds from settlement of derivative instruments	-44,063,000	0	-147,306,000
Proceeds from Employee Share Purchase Plan (ESPP)	3,401,000	5,399,000	5,262,000
Proceeds from exercise of options	17,252,000	49,039,000	95,322,000
Payments for Repurchase of Preferred Stock and Preference Stock	0	150,000,000	0
Premium on Redemption of Preferred Shares Cash	0	-23,000	0
Payment of offering costs	-1,047,000	-39,359,000	-3,596,000
Other financing activities, net	-48,000	-48,000	-48,000
Contributions - Noncontrolling Interests - Partially Owned Properties	27,660,000	8,221,000	75,911,000
Contributions - Noncontrolling Interests - Operating Partnership	5,000	5,000	0
Distributions:	'	'	'
Net cash (used for) provided by financing activities	-1,420,995,000	-556,318,000	-650,746,000
Net (decrease) increase in cash and cash equivalents	-559,056,000	228,669,000	-47,487,000
Cash and cash equivalents, beginning of year	612,590,000	383,921,000	431,408,000
Cash and cash equivalents, end of year	53,534,000	612,590,000	383,921,000
SUPPLEMENTAL INFORMATION:	'	'	'
Cash paid for interest, net of amounts capitalized	722,861,000	464,937,000	477,434,000
Net cash (received) paid for income and other taxes	1,152,000	673,000	645,000
Real estate acquisitions/dispositions/other:	'	'	'
Mortgage loans assumed	0	137,644,000	158,240,000
Valuation of OP Units issued	0	66,606,000	0
Amortization of deferred financing costs:	'	'	'
Amortization Of Deferred Financing Costs Investment In Real Estate Net	-152,000	0	0
Amortization Of Deferred Financing Costs Deferred Financing Costs Net	22,577,000	21,435,000	17,846,000
Amortization of discounts and premiums on debt:	'	'	'
Mortgage notes payable	-158,625,000	-10,333,000	-8,260,000
Notes, net	2,186,000	2,152,000	6,782,000
Amortization of deferred settlements on derivative instruments:	'	'	'
Other liabilities	-534,000	-534,000	-535,000
Accumulated other comprehensive income	20,141,000	14,678,000	4,343,000
Loss From Investments In Unconsolidated Entities [Abstract]	'	'	'
Income Loss From Equity Method Investments Merger	53,073,000	14,000	0
Other Liabilities Loss From Investments in Unconsolidated Entities Merger	5,090,000	0	0
Unrealized loss (gain) on derivative instruments:	'	'	'
Other assets	-17,139,000	7,448,000	6,826,000
Mortgage notes payable	0	-2,589,000	-612,000
Notes, net	-1,523,000	-4,860,000	-2,937,000
Other liabilities	-39,000	11,772,000	140,507,000
Accumulated other comprehensive (loss) income	18,771,000	-11,772,000	-143,598,000
Acquisition of Archstone, net of cash acquired [Abstract]	'	'	'
Acquisition of Archstone Investment in Real Estate Net	-8,687,355,000	0	0
Acquisition of Archstone Investments in Unconsolidated Entities	-225,568,000	0	0
Acquisition of Archstone Deposits Restricted	-528,000	0	0
Acquisition of Archstone Escrow Deposits Mortgage	-37,582,000	0	0
Acquisition of Archstone Deferred Financing Costs	-25,780,000	0	0
Acquisition of Archstone Other Assets	-215,622,000	0	0
Acquisition of Archstone Mortgage Notes Payable	3,076,876,000	0	0
Acquisition of Archstone Accounts Payable and Accrued Liabilities	16,984,000	0	0
Acqusition of Archstone Interest Payable	11,305,000	0	0
Acquisition of Archstone Other Liabilities	117,299,000	0	0
Acquisition of Archstone Security Deposits	10,965,000	0	0
Acquisition of Archstone Common Shares Issued	1,929,868,000	0	0
Acquisition of Archstone Noncontrolling Interests Partially Owned Properties	28,263,000	0	0
Interest capitalized for real estate and unconsolidated entities under development:	'	'	'
Investment in real estate, net	-45,533,000	-21,661,000	-8,785,000
Investments in unconsolidated entities	-1,788,000	-848,000	-323,000
Investments in unconsolidated entities [Abstract]	'	'	'
Investments in unconsolidated entities	-13,656,000	-5,291,000	-2,021,000
Investments in unconsolidated entities other liabilities	-52,815,000	0	0
Deconsolidation of previously consolidated properties:	'	'	'
Investment in real estate, net	0	0	35,495,000
Investments in unconsolidated entities	0	0	-7,135,000
(Payments on) proceeds from settlement of derivative instruments:	'	'	'
Other liabilities	-44,013,000	0	-147,306,000
Other:	'	'	'
Receivable on sale of Common Shares	0	28,457,000	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	($613,000)	$0	$0

CONSOLIDATED_STATEMENTS_OF_CAS1

CONSOLIDATED STATEMENTS OF CASH FLOWS OF ERP OPERATING LIMITED PARTNERSHIP (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net income	$1,905,353,000	$881,204,000	$935,197,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation	1,013,353,000	684,992,000	663,616,000
Amortization of deferred financing costs	22,425,000	21,435,000	17,846,000
Amortization of above/below market leases	898,000	0	0
Amortization of discounts and premiums on debt	-156,439,000	-8,181,000	-1,478,000
Amortization of deferred settlements on derivative instruments	19,607,000	14,144,000	3,808,000
Write-off of pursuit costs	5,184,000	9,056,000	5,075,000
Loss from Investments in Unconsolidated Entities Adjustment	-58,163,000	-14,000	0
Distributions from unconsolidated entities - return on capital	2,481,000	575,000	319,000
Net (Gain) on Sales of Investment Securities/Technology Investments	-4,203,000	0	-4,537,000
Net (gain) on sales of unconsolidated entities	-7,000	0	0
Net gain (loss) on sales of land parcels	-12,227,000	0	-4,217,000
Net (gain) on sales of discontinued operations	-2,036,505,000	-548,278,000	-826,489,000
Unrealized loss (gain) on derivative instruments	70,000	-1,000	186,000
Compensation paid with Company Common Shares	35,474,000	24,832,000	21,177,000
Changes in assets and liabilities:	'	'	'
Decrease (increase) in deposits - restricted	3,684,000	-4,091,000	4,523,000
Decrease in mortgage deposits	-1,813,000	-176,000	-2,133,000
Decrease (increase) in other assets	3,742,000	-20,411,000	-2,743,000
Increase (decrease) in accounts payable and accrued expenses	6,229,000	-2,102,000	332,000
(Decrease) in accrued interest payable	-9,219,000	-11,898,000	-10,510,000
Increase (decrease) in other liabilities	15,401,000	2,987,000	-8,245,000
(Decrease) increase in security deposits	-6,361,000	1,702,000	4,474,000
Net cash provided by operating activities	868,916,000	1,046,155,000	800,467,000
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Acquisition of Archstone, net of cash acquired	-4,000,875,000	0	0
Investment in real estate - acquisitions	-108,308,000	-843,976,000	-1,441,599,000
Investment in real estate - development/other	-377,442,000	-180,409,000	-120,741,000
Improvements to real estate	-135,816,000	-152,828,000	-144,452,000
Additions to non-real estate property	-4,134,000	-8,821,000	-7,110,000
Interest capitalized for real estate and unconsolidated entities under development	-47,321,000	-22,509,000	-9,108,000
Proceeds from disposition of real estate, net	4,551,454,000	1,049,219,000	1,500,583,000
Investments in unconsolidated entities	66,471,000	5,291,000	2,021,000
Distributions from unconsolidated entities - return of capital	25,471,000	0	0
Proceeds from Sale of Available-for-sale Securities	-4,878,000	0	-4,537,000
Decrease (increase) in deposits on real estate acquisitions and investments, net	143,694,000	-97,984,000	7,631,000
Decrease (increase) in mortgage deposits	7,893,000	1,444,000	-479,000
Deconsolidation of previously consolidated properties	0	0	28,360,000
Acquisition of Noncontrolling Interests - Partially Owned Properties	0	-13,000	-12,809,000
Net cash (used for) provided by investing activities	-6,977,000	-261,168,000	-197,208,000
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Loan and bond acquisition costs	-16,526,000	-21,209,000	-20,421,000
Mortgage Deposits Financing Activities	-5,631,000	-57,000	247,000
Mortgage notes payable:	'	'	'
Proceeds from Issuance of Long-term Debt	902,886,000	26,495,000	190,905,000
Restricted cash	0	2,370,000	16,596,000
Lump sum payoffs	-2,532,682,000	-350,247,000	-974,956,000
Scheduled principal repayments	-12,658,000	-14,088,000	-16,726,000
Notes, net:	'	'	'
Proceeds	1,245,550,000	0	996,190,000
Repayments of Notes Payable	400,000,000	975,991,000	575,641,000
Lines of credit:	'	'	'
Proceeds	9,832,000,000	5,876,000,000	1,455,000,000
Repayments	-9,717,000,000	-5,876,000,000	-1,455,000,000
(Payments on) proceeds from settlement of derivative instruments	-44,063,000	0	-147,306,000
Proceeds from EQR's Employee Share Purchase Plan (ESPP)	3,401,000	5,399,000	5,262,000
Proceeds from exercise of EQR options	17,252,000	49,039,000	95,322,000
Payments for Repurchase of Preferred Stock and Preference Stock	0	150,000,000	0
Premium on Redemption of Preferred Shares Cash	0	-23,000	0
Payment of offering costs	-1,047,000	-39,359,000	-3,596,000
Other financing activities, net	-48,000	-48,000	-48,000
Contributions - Noncontrolling Interests - Partially Owned Properties	27,660,000	8,221,000	75,911,000
Contributions - Noncontrolling Interests - Operating Partnership	5,000	5,000	0
Distributions:	'	'	'
Net cash (used for) provided by financing activities	-1,420,995,000	-556,318,000	-650,746,000
Net (decrease) increase in cash and cash equivalents	-559,056,000	228,669,000	-47,487,000
Cash and cash equivalents, beginning of year	612,590,000	383,921,000	431,408,000
Cash and cash equivalents, end of year	53,534,000	612,590,000	383,921,000
SUPPLEMENTAL INFORMATION:	'	'	'
Cash paid for interest, net of amounts capitalized	722,861,000	464,937,000	477,434,000
Net cash paid (received) for income and other taxes	1,152,000	673,000	645,000
Real estate acquisitions/dispositions/other:	'	'	'
Mortgage loans assumed	0	137,644,000	158,240,000
Valuation of OP Units issued	0	66,606,000	0
Amortization of deferred financing costs:	'	'	'
Amortization Of Deferred Financing Costs Investment In Real Estate Net	-152,000	0	0
Amortization Of Deferred Financing Costs Deferred Financing Costs Net	22,577,000	21,435,000	17,846,000
Amortization of discounts and premiums on debt:	'	'	'
Mortgage notes payable	-158,625,000	-10,333,000	-8,260,000
Notes, net	2,186,000	2,152,000	6,782,000
Amortization of deferred settlements on derivative instruments:	'	'	'
Other liabilities	-534,000	-534,000	-535,000
Accumulated other comprehensive income	20,141,000	14,678,000	4,343,000
Loss From Investments In Unconsolidated Entities [Abstract]	'	'	'
Income Loss From Equity Method Investments Merger	53,073,000	14,000	0
Other Liabilities Loss From Investments in Unconsolidated Entities Merger	5,090,000	0	0
Unrealized loss (gain) on derivative instruments:	'	'	'
Other assets	-17,139,000	7,448,000	6,826,000
Mortgage notes payable	0	-2,589,000	-612,000
Notes, net	-1,523,000	-4,860,000	-2,937,000
Other liabilities	-39,000	11,772,000	140,507,000
Accumulated other comprehensive (loss) income	18,771,000	-11,772,000	-143,598,000
Acquisition of Archstone, net of cash acquired [Abstract]	'	'	'
Acquisition of Archstone Investment in Real Estate Net	-8,687,355,000	0	0
Acquisition of Archstone Investments in Unconsolidated Entities	-225,568,000	0	0
Acquisition of Archstone Deposits Restricted	-528,000	0	0
Acquisition of Archstone Escrow Deposits Mortgage	-37,582,000	0	0
Acquisition of Archstone Deferred Financing Costs	-25,780,000	0	0
Acquisition of Archstone Other Assets	-215,622,000	0	0
Acquisition of Archstone Mortgage Notes Payable	3,076,876,000	0	0
Acquisition of Archstone Accounts Payable and Accrued Liabilities	16,984,000	0	0
Acqusition of Archstone Interest Payable	11,305,000	0	0
Acquisition of Archstone Other Liabilities	117,299,000	0	0
Acquisition of Archstone Security Deposits	10,965,000	0	0
Acquisition of Archstone Common Shares Issued	1,929,868,000	0	0
Acquisition of Archstone Noncontrolling Interests Partially Owned Properties	28,263,000	0	0
Interest capitalized for real estate and unconsolidated entities under development:	'	'	'
Investment in real estate, net	-45,533,000	-21,661,000	-8,785,000
Investments in unconsolidated entities	-1,788,000	-848,000	-323,000
Investments in unconsolidated entities [Abstract]	'	'	'
Investments in unconsolidated entities	-13,656,000	-5,291,000	-2,021,000
Investments in unconsolidated entities other liabilities	-52,815,000	0	0
Deconsolidation of previously consolidated properties:	'	'	'
Investment in real estate, net	0	0	35,495,000
Investments in unconsolidated entities	0	0	-7,135,000
(Payments on) proceeds from settlement of derivative instruments:	'	'	'
Proceeds From Payments On Settlement Of Derivative Instruments Other Assets	-50,000	0	0
Other liabilities	-44,013,000	0	-147,306,000
Other:	'	'	'
Receivable For Common Shares OP Units Issued	0	28,457,000	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	-613,000	0	0
OPERATING PARTNERSHIP	'	'	'
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net income	1,905,353,000	881,204,000	935,197,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation	1,013,353,000	684,992,000	663,616,000
Amortization of deferred financing costs	22,425,000	21,435,000	17,846,000
Amortization of above/below market leases	898,000	0	0
Amortization of discounts and premiums on debt	-156,439,000	-8,181,000	-1,478,000
Amortization of deferred settlements on derivative instruments	19,607,000	14,144,000	3,808,000
Write-off of pursuit costs	5,184,000	9,056,000	5,075,000
Loss from Investments in Unconsolidated Entities Adjustment	58,163,000	14,000	0
Distributions from unconsolidated entities - return on capital	2,481,000	575,000	319,000
Net (Gain) on Sales of Investment Securities/Technology Investments	-4,203,000	0	-4,537,000
Net (gain) on sales of unconsolidated entities	-7,000	0	0
Net gain (loss) on sales of land parcels	-12,227,000	0	-4,217,000
Net (gain) on sales of discontinued operations	-2,036,505,000	-548,278,000	-826,489,000
Unrealized loss (gain) on derivative instruments	70,000	-1,000	186,000
Compensation paid with Company Common Shares	35,474,000	24,832,000	21,177,000
Changes in assets and liabilities:	'	'	'
Decrease (increase) in deposits - restricted	3,684,000	-4,091,000	4,523,000
Decrease in mortgage deposits	1,813,000	176,000	2,133,000
Decrease (increase) in other assets	3,742,000	-20,411,000	-2,743,000
Increase (decrease) in accounts payable and accrued expenses	6,229,000	-2,102,000	332,000
(Decrease) in accrued interest payable	-9,219,000	-11,898,000	-10,510,000
Increase (decrease) in other liabilities	15,401,000	2,987,000	-8,245,000
(Decrease) increase in security deposits	-6,361,000	1,702,000	4,474,000
Net cash provided by operating activities	868,916,000	1,046,155,000	800,467,000
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Acquisition of Archstone, net of cash acquired	-4,000,875,000	0	0
Investment in real estate - acquisitions	-108,308,000	-843,976,000	-1,441,599,000
Investment in real estate - development/other	-377,442,000	-180,409,000	-120,741,000
Improvements to real estate	-135,816,000	-152,828,000	-144,452,000
Additions to non-real estate property	-4,134,000	-8,821,000	-7,110,000
Interest capitalized for real estate and unconsolidated entities under development	-47,321,000	-22,509,000	-9,108,000
Proceeds from disposition of real estate, net	4,551,454,000	1,049,219,000	1,500,583,000
Investments in unconsolidated entities	-66,471,000	-5,291,000	-2,021,000
Distributions from unconsolidated entities - return of capital	25,471,000	0	0
Proceeds from Sale of Available-for-sale Securities	4,878,000	0	4,537,000
Decrease (increase) in deposits on real estate acquisitions and investments, net	143,694,000	-97,984,000	7,631,000
Decrease (increase) in mortgage deposits	7,893,000	1,444,000	-479,000
Deconsolidation of previously consolidated properties	0	0	28,360,000
Acquisition of Noncontrolling Interests - Partially Owned Properties	0	-13,000	-12,809,000
Net cash (used for) provided by investing activities	-6,977,000	-261,168,000	-197,208,000
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Loan and bond acquisition costs	-16,526,000	-21,209,000	-20,421,000
Mortgage Deposits Financing Activities	-5,631,000	-57,000	247,000
Mortgage notes payable:	'	'	'
Proceeds from Issuance of Long-term Debt	902,886,000	26,495,000	190,905,000
Restricted cash	0	2,370,000	16,596,000
Lump sum payoffs	-2,532,682,000	-350,247,000	-974,956,000
Scheduled principal repayments	-12,658,000	-14,088,000	-16,726,000
Notes, net:	'	'	'
Proceeds	1,245,550,000	0	996,190,000
Repayments of Notes Payable	-400,000,000	-975,991,000	-575,641,000
Lines of credit:	'	'	'
Proceeds	9,832,000,000	5,876,000,000	1,455,000,000
Repayments	-9,717,000,000	-5,876,000,000	-1,455,000,000
(Payments on) proceeds from settlement of derivative instruments	-44,063,000	0	-147,306,000
Proceeds from sale of OP Units	0	1,417,040,000	173,484,000
Proceeds from EQR's Employee Share Purchase Plan (ESPP)	3,401,000	5,399,000	5,262,000
Proceeds from exercise of EQR options	17,252,000	49,039,000	95,322,000
Payments for Repurchase of Preferred Stock and Preference Stock	0	-150,000,000	0
Premium on Redemption of Preferred Shares Cash	0	-23,000	0
Payment of offering costs	-1,047,000	-39,359,000	-3,596,000
Other financing activities, net	-48,000	-48,000	-48,000
Contributions - Noncontrolling Interests - Partially Owned Properties	27,660,000	8,221,000	75,911,000
Contributions - Noncontrolling Interests - Operating Partnership	5,000	5,000	0
Distributions:	'	'	'
OP Units - General Partner	-681,610,000	-473,451,000	-432,023,000
Preference Units	-4,145,000	-13,416,000	-12,829,000
OP Units - Limited Partners	-27,897,000	-21,915,000	-20,002,000
Noncontrolling Interests - Partially Owned Properties	-6,442,000	-5,083,000	-1,115,000
Net cash (used for) provided by financing activities	-1,420,995,000	-556,318,000	-650,746,000
Net (decrease) increase in cash and cash equivalents	-559,056,000	228,669,000	-47,487,000
Cash and cash equivalents, beginning of year	612,590,000	383,921,000	431,408,000
Cash and cash equivalents, end of year	53,534,000	612,590,000	383,921,000
SUPPLEMENTAL INFORMATION:	'	'	'
Cash paid for interest, net of amounts capitalized	722,861,000	464,937,000	477,434,000
Net cash paid (received) for income and other taxes	1,152,000	673,000	645,000
Real estate acquisitions/dispositions/other:	'	'	'
Mortgage loans assumed	0	137,644,000	158,240,000
Valuation of OP Units issued	0	66,606,000	0
Amortization of deferred financing costs:	'	'	'
Amortization Of Deferred Financing Costs Investment In Real Estate Net	-152,000	0	0
Amortization Of Deferred Financing Costs Deferred Financing Costs Net	22,577,000	21,435,000	17,846,000
Amortization of discounts and premiums on debt:	'	'	'
Mortgage notes payable	-158,625,000	-10,333,000	-8,260,000
Notes, net	2,186,000	2,152,000	6,782,000
Amortization of deferred settlements on derivative instruments:	'	'	'
Other liabilities	-534,000	-534,000	-535,000
Accumulated other comprehensive income	20,141,000	14,678,000	4,343,000
Loss From Investments In Unconsolidated Entities [Abstract]	'	'	'
Income Loss From Equity Method Investments Merger	53,073,000	14,000	0
Other Liabilities Loss From Investments in Unconsolidated Entities Merger	5,090,000	0	0
Unrealized loss (gain) on derivative instruments:	'	'	'
Other assets	-17,139,000	7,448,000	6,826,000
Mortgage notes payable	0	-2,589,000	-612,000
Notes, net	-1,523,000	-4,860,000	-2,937,000
Other liabilities	-39,000	11,772,000	140,507,000
Accumulated other comprehensive (loss) income	18,771,000	-11,772,000	-143,598,000
Acquisition of Archstone, net of cash acquired [Abstract]	'	'	'
Acquisition of Archstone Investment in Real Estate Net	-8,687,355,000	0	0
Acquisition of Archstone Investments in Unconsolidated Entities	-225,568,000	0	0
Acquisition of Archstone Deposits Restricted	-528,000	0	0
Acquisition of Archstone Escrow Deposits Mortgage	-37,582,000	0	0
Acquisition of Archstone Deferred Financing Costs	-25,780,000	0	0
Acquisition of Archstone Other Assets	-215,622,000	0	0
Acquisition of Archstone Mortgage Notes Payable	3,076,876,000	0	0
Acquisition of Archstone Accounts Payable and Accrued Liabilities	16,984,000	0	0
Acqusition of Archstone Interest Payable	11,305,000	0	0
Acquisition of Archstone Other Liabilities	117,299,000	0	0
Acquisition of Archstone Security Deposits	10,965,000	0	0
Acquisition of Archstone Common Shares Issued	1,929,868,000	0	0
Acquisition of Archstone Noncontrolling Interests Partially Owned Properties	28,263,000	0	0
Interest capitalized for real estate and unconsolidated entities under development:	'	'	'
Investment in real estate, net	-45,533,000	-21,661,000	-8,785,000
Investments in unconsolidated entities	-1,788,000	-848,000	-323,000
Investments in unconsolidated entities [Abstract]	'	'	'
Investments in unconsolidated entities	-13,656,000	-5,291,000	-2,021,000
Investments in unconsolidated entities other liabilities	-52,815,000	0	0
Deconsolidation of previously consolidated properties:	'	'	'
Investment in real estate, net	0	0	35,495,000
Investments in unconsolidated entities	0	0	-7,135,000
(Payments on) proceeds from settlement of derivative instruments:	'	'	'
Other liabilities	-44,013,000	0	-147,306,000
Other:	'	'	'
Receivable For Common Shares OP Units Issued	0	28,457,000	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	($613,000)	$0	$0

CONSOLIDATED_STATEMENT_OF_CHAN

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $)	Total	PREFERRED SHARES	COMMON SHARES, $0.01 PAR VALUE	PAID IN CAPITAL	Retained Earnings [Member]	ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME	OPERATING PARTNERSHIP	Partially Owned Properties [Member]	Series N Preferred Stock [Member]
In Thousands, unless otherwise specified
Beginning Balance, Noncontrolling Interest at Dec. 31, 2010	'	'	'	'	'	'	$110,399	$7,991	'
Beginning Balance, Parent at Dec. 31, 2010	'	200,000	2,902	4,741,521	203,581	-57,818	'	'	'
Preferred Shares:	'	'	'	'	'	'	'	'	'
Preferred Stock Preference Units Dividend Rate Percentage	'	'	'	'	'	'	'	'	6.48%
Payments for Repurchase of Preferred Stock and Preference Stock	0	0	'	'	'	'	'	'	'
Common Share Issuance:	'	'	'	'	'	'	'	'	'
Conversion of OP Units into Common Shares	'	'	3	8,577	'	'	-8,580	'	'
Issuance of Common Shares	201,900	'	39	201,903	'	'	'	'	'
Exercise of share options	'	'	29	95,293	'	'	'	'	'
Employee Share Purchase Plan (ESPP)	'	'	1	5,261	'	'	'	'	'
Conversion of restricted shares to LTIP Units	'	'	-1	-3,933	'	'	3,934	'	'
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	'	'	2	9,100	'	'	'	'	'
Share-based employee compensation expense:	'	'	'	'	'	'	'	'	'
Share options	'	'	'	9,545	'	'	'	'	'
ESPP discount	'	'	'	1,194	'	'	'	'	'
Offering costs	'	'	'	-3,596	'	'	'	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	'	'	0	0	'	'	'	'
Supplemental Executive Retirement Plan (SERP)	'	'	'	10,765	'	'	'	'	'
Acquisition of Noncontrolling Interests - Partially Owned Properties	'	'	'	-4,784	'	'	'	-8,025	'
Change in market value	22,714	'	'	-22,714	'	'	'	'	'
Adjustment for Noncontrolling Interests ownership in Operating Partnership	'	'	'	-946	'	'	946	'	'
Net income attributable to controlling interests	893,585	'	'	'	893,585	'	'	'	'
Common Share distributions	'	'	'	'	-467,729	'	'	'	'
Preferred Share distributions	'	'	'	'	-13,865	'	'	'	'
Premium on Redemption of Preferred Shares Cash	0	'	'	'	0	'	'	'	'
Accumulated other comprehensive (loss) income - derivative instruments:	'	'	'	'	'	'	'	'	'
Unrealized holding gains (losses) arising during the year	-143,598	'	'	'	'	-143,598	'	'	'
Losses reclassified into earnings from other comprehensive income	-4,343	'	'	'	'	4,343	'	'	'
Accumulated other comprehensive income (loss) - other instruments:	'	'	'	'	'	'	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	355	'	'	'	'	355	'	'	'
Gain on Sale of Securities, Net	0	'	'	'	'	'	'	'	'
Currency translation adjustments arising during the year	0	'	'	'	'	'	'	'	'
Issuance of OP Units to Noncontrolling Interests	'	'	'	'	'	'	0	'	'
Issuance of LTIP Units to Noncontrolling Interests	'	'	'	'	'	'	0	'	'
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner	'	'	3	8,577	'	'	-8,580	'	'
Equity Compensation associated with Noncontrolling Interests	'	'	'	'	'	'	3,641	'	'
Net income	935,197	'	'	'	'	'	40,780	832	'
Distributions to Noncontrolling Interests	'	'	'	'	'	'	-21,434	-1,163	'
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	10,150	'	'	'	'	'	-10,150	'	'
Contributions - Noncontrolling Interests - Partially Owned Properties	75,911	'	'	'	'	'	'	75,911	'
Archstone Acquisition Noncontrolling Interests Partially Owned Properties	'	'	'	'	'	'	'	0	'
Other	'	'	'	'	'	'	'	-1,240	'
Ending Balance, Noncontrolling Interest at Dec. 31, 2011	'	'	'	'	'	'	119,536	74,306	'
Ending Balance, Parent at Dec. 31, 2011	'	200,000	2,975	5,047,186	615,572	-196,718	'	'	'
Preferred Shares:	'	'	'	'	'	'	'	'	'
Preferred Stock Preference Units Dividend Rate Percentage	'	'	'	'	'	'	'	'	6.48%
Payments for Repurchase of Preferred Stock and Preference Stock	-150,000	-150,000	'	'	'	'	'	'	'
Common Share Issuance:	'	'	'	'	'	'	'	'	'
Conversion of OP Units into Common Shares	'	'	7	18,922	'	'	-18,929	'	'
Issuance of Common Shares	192,300	'	250	1,388,333	'	'	'	'	'
Exercise of share options	'	'	16	49,023	'	'	'	'	'
Employee Share Purchase Plan (ESPP)	'	'	1	5,398	'	'	'	'	'
Conversion of restricted shares to LTIP Units	'	'	0	0	'	'	0	'	'
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	'	'	2	8,934	'	'	'	'	'
Share-based employee compensation expense:	'	'	'	'	'	'	'	'	'
Share options	'	'	'	11,752	'	'	'	'	'
ESPP discount	'	'	'	965	'	'	'	'	'
Offering costs	'	'	'	-39,359	'	'	'	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	'	'	5,129	-5,129	'	'	'	'
Supplemental Executive Retirement Plan (SERP)	'	'	'	282	'	'	'	'	'
Acquisition of Noncontrolling Interests - Partially Owned Properties	'	'	'	1,293	'	'	'	-1,306	'
Change in market value	-38,734	'	'	38,734	'	'	'	'	'
Adjustment for Noncontrolling Interests ownership in Operating Partnership	'	'	'	5,763	'	'	-5,763	'	'
Net income attributable to controlling interests	841,719	'	'	'	841,719	'	'	'	'
Common Share distributions	'	'	'	'	-554,429	'	'	'	'
Preferred Share distributions	'	'	'	'	-10,355	'	'	'	'
Premium on Redemption of Preferred Shares Cash	-23	'	'	'	-23	'	'	'	'
Accumulated other comprehensive (loss) income - derivative instruments:	'	'	'	'	'	'	'	'	'
Unrealized holding gains (losses) arising during the year	-11,772	'	'	'	'	-11,772	'	'	'
Losses reclassified into earnings from other comprehensive income	-14,678	'	'	'	'	14,678	'	'	'
Accumulated other comprehensive income (loss) - other instruments:	'	'	'	'	'	'	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	664	'	'	'	'	664	'	'	'
Gain on Sale of Securities, Net	0	'	'	'	'	'	'	'	'
Currency translation adjustments arising during the year	0	'	'	'	'	'	'	'	'
Issuance of OP Units to Noncontrolling Interests	'	'	'	'	'	'	66,606	'	'
Issuance of LTIP Units to Noncontrolling Interests	'	'	'	'	'	'	5	'	'
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner	'	'	7	18,922	'	'	-18,929	'	'
Equity Compensation associated with Noncontrolling Interests	'	'	'	'	'	'	5,307	'	'
Net income	881,204	'	'	'	'	'	38,641	844	'
Distributions to Noncontrolling Interests	'	'	'	'	'	'	-25,095	-5,131	'
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	20,702	'	'	'	'	'	-20,702	'	'
Contributions - Noncontrolling Interests - Partially Owned Properties	8,221	'	'	'	'	'	'	8,221	'
Archstone Acquisition Noncontrolling Interests Partially Owned Properties	'	'	'	'	'	'	'	0	'
Other	'	'	'	'	'	'	'	754	'
Ending Balance, Noncontrolling Interest at Dec. 31, 2012	7,527,107	'	'	'	'	'	159,606	77,688	'
Ending Balance, Parent at Dec. 31, 2012	7,289,813	50,000	3,251	6,542,355	887,355	-193,148	'	'	'
Preferred Shares:	'	'	'	'	'	'	'	'	'
Preferred Stock Preference Units Dividend Rate Percentage	'	'	'	'	'	'	'	'	6.48%
Payments for Repurchase of Preferred Stock and Preference Stock	0	0	'	'	'	'	'	'	-150,000
Common Share Issuance:	'	'	'	'	'	'	'	'	'
Conversion of OP Units into Common Shares	'	'	1	1,698	'	'	-1,699	'	'
Issuance of Common Shares	'	'	345	1,929,523	'	'	'	'	'
Exercise of share options	'	'	5	17,247	'	'	'	'	'
Employee Share Purchase Plan (ESPP)	'	'	1	3,400	'	'	'	'	'
Conversion of restricted shares to LTIP Units	'	'	0	0	'	'	0	'	'
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	'	'	2	13,262	'	'	'	'	'
Share-based employee compensation expense:	'	'	'	'	'	'	'	'	'
Share options	'	'	'	10,514	'	'	'	'	'
ESPP discount	'	'	'	632	'	'	'	'	'
Offering costs	'	'	'	-1,047	'	'	'	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	'	'	0	0	'	'	'	5,100
Supplemental Executive Retirement Plan (SERP)	'	'	'	-422	'	'	'	'	'
Acquisition of Noncontrolling Interests - Partially Owned Properties	'	'	'	0	'	'	'	0	'
Change in market value	-79,667	'	'	79,667	'	'	'	'	'
Adjustment for Noncontrolling Interests ownership in Operating Partnership	'	'	'	-35,329	'	'	35,329	'	'
Net income attributable to controlling interests	1,830,613	'	'	'	1,830,613	'	'	'	'
Common Share distributions	'	'	'	'	-666,565	'	'	'	'
Preferred Share distributions	'	'	'	'	-4,145	'	'	'	'
Premium on Redemption of Preferred Shares Cash	0	'	'	'	0	'	'	'	'
Accumulated other comprehensive (loss) income - derivative instruments:	'	'	'	'	'	'	'	'	'
Unrealized holding gains (losses) arising during the year	18,771	'	'	'	'	18,771	'	'	'
Losses reclassified into earnings from other comprehensive income	-20,141	'	'	'	'	20,141	'	'	'
Accumulated other comprehensive income (loss) - other instruments:	'	'	'	'	'	'	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	583	'	'	'	'	583	'	'	'
Gain on Sale of Securities, Net	-2,122	'	'	'	'	'	'	'	'
Currency translation adjustments arising during the year	613	'	'	'	'	'	'	'	'
Issuance of OP Units to Noncontrolling Interests	'	'	'	'	'	'	0	'	'
Issuance of LTIP Units to Noncontrolling Interests	'	'	'	'	'	'	5	'	'
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner	'	'	1	1,698	'	'	-1,699	'	'
Equity Compensation associated with Noncontrolling Interests	'	'	'	'	'	'	13,609	'	'
Net income	1,905,353	'	'	'	'	'	75,278	-538	'
Distributions to Noncontrolling Interests	'	'	'	'	'	'	-26,277	-6,490	'
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	44,439	'	'	'	'	'	-44,439	'	'
Contributions - Noncontrolling Interests - Partially Owned Properties	27,660	'	'	'	'	'	'	27,660	'
Archstone Acquisition Noncontrolling Interests Partially Owned Properties	'	'	'	'	'	'	'	28,263	'
Other	'	'	'	'	'	'	'	0	'
Ending Balance, Noncontrolling Interest at Dec. 31, 2013	10,845,196	'	'	'	'	'	211,412	126,583	'
Ending Balance, Parent at Dec. 31, 2013	$10,507,201	$50,000	$3,605	$8,561,500	$2,047,258	($155,162)	'	'	'

CONSOLIDATED_STATEMENT_OF_CHAN1

CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (USD $)	Total	Preferred Stock [Member]	General Partner [Member]	Limited Partner [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Partially Owned Properties [Member]	Series N Preferred Stock [Member]	Series N Preferred Stock [Member]
In Thousands, unless otherwise specified	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	Preferred Stock [Member]
Balance, beginning of year at Dec. 31, 2010	'	$200,000	$4,948,004	$110,399	($57,818)	$7,991	'	'
Payments for Repurchase of Preferred Stock and Preference Stock	0	0	'	'	'	'	'	'
Preferred Stock Preference Units Dividend Rate Percentage	'	'	'	'	'	'	6.48%	6.48%
OP Unit Issuance:	'	'	'	'	'	'	'	'
Conversion of OP Units held by Limited Partners into OP Units held by General Partner	'	'	8,580	-8,580	'	'	'	'
Issuance of OP Units	'	'	201,942	'	'	'	'	'
Exercise of EQR share options	'	'	95,322	'	'	'	'	'
EQR's Employee Share Purchase Plan (ESPP)	'	'	5,262	'	'	'	'	'
Conversion of EQR restricted shares to LTIP Units	'	'	-3,934	3,934	'	'	'	'
Share-based employee compensation expense:	'	'	'	'	'	'	'	'
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	'	'	9,102	'	'	'	'	'
EQR share options	'	'	9,545	'	'	'	'	'
EQR ESPP discount	'	'	1,194	'	'	'	'	'
Offering costs	'	'	-3,596	'	'	'	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	'	0	'	'	'	'	'
Net income available to Units - General Partner	'	'	879,720	'	'	'	'	'
OP Units - General Partner distributions	'	'	-467,729	'	'	'	'	'
Supplemental Executive Retirement Plan (SERP)	'	'	10,765	'	'	'	'	'
Acquisition of Noncontrolling Interests - Partially Owned Properties	'	'	-4,784	'	'	-8,025	'	'
Change in market value of Redeemable Limited Partners	'	'	-22,714	'	'	'	'	'
Adjustment for Limited Partners ownership in Operating Partnership	'	'	-946	946	'	'	'	'
Issuance of OP Units to Noncontrolling Interests	'	'	'	0	'	'	'	'
Issuance Of Long Term Incentive Plan Units Into Noncontrolling Interest	'	'	'	0	'	'	'	'
Equity compensation associated with Units - Limited Partners	'	'	'	3,641	'	'	'	'
Limited Partners	'	'	'	40,780	'	'	'	'
Units - Limited Partners distributions	'	'	'	-21,434	'	'	'	'
Change in carrying value of Redeemable Limited Partners	'	'	'	-10,150	'	'	'	'
Accumulated other comprehensive (loss) income - derivative instruments:	'	'	'	'	'	'	'	'
Unrealized holding gains (losses) arising during the year	-143,598	'	'	'	-143,598	'	'	'
Losses reclassified into earnings from other comprehensive income	-4,343	'	'	'	4,343	'	'	'
Accumulated other comprehensive income (loss) - other instruments:	'	'	'	'	'	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	355	'	'	'	355	'	'	'
Gain on Sale of Securities, Net	0	'	'	'	0	'	'	'
Currency translation adjustments arising during the year	0	'	'	'	0	'	'	'
Net income	935,197	'	'	'	'	832	'	'
Contributions - Noncontrolling Interests - Partially Owned Properties	75,911	'	'	'	'	75,911	'	'
Archstone Acquisition Noncontrolling Interests Partially Owned Properties	'	'	'	'	'	0	'	'
Distributions to Noncontrolling Interests	'	'	'	'	'	-1,163	'	'
Stockholders' Equity, Other	'	'	'	'	'	-1,240	'	'
Balance, end of period at Dec. 31, 2011	'	200,000	5,665,733	119,536	-196,718	74,306	'	'
Payments for Repurchase of Preferred Stock and Preference Stock	150,000	-150,000	'	'	'	'	'	'
Preferred Stock Preference Units Dividend Rate Percentage	'	'	'	'	'	'	6.48%	0.00%
OP Unit Issuance:	'	'	'	'	'	'	'	'
Conversion of OP Units held by Limited Partners into OP Units held by General Partner	'	'	18,929	-18,929	'	'	'	'
Issuance of OP Units	'	'	1,388,583	'	'	'	'	'
Exercise of EQR share options	'	'	49,039	'	'	'	'	'
EQR's Employee Share Purchase Plan (ESPP)	'	'	5,399	'	'	'	'	'
Conversion of EQR restricted shares to LTIP Units	'	'	0	0	'	'	'	'
Share-based employee compensation expense:	'	'	'	'	'	'	'	'
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	'	'	8,936	'	'	'	'	'
EQR share options	'	'	11,752	'	'	'	'	'
EQR ESPP discount	'	'	965	'	'	'	'	'
Offering costs	'	'	-39,359	'	'	'	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	'	5,129	'	'	'	'	'
Net income available to Units - General Partner	'	'	826,212	'	'	'	'	'
OP Units - General Partner distributions	'	'	-554,429	'	'	'	'	'
Supplemental Executive Retirement Plan (SERP)	'	'	282	'	'	'	'	'
Acquisition of Noncontrolling Interests - Partially Owned Properties	'	'	1,293	'	'	-1,306	'	'
Change in market value of Redeemable Limited Partners	'	'	38,734	'	'	'	'	'
Adjustment for Limited Partners ownership in Operating Partnership	'	'	5,763	-5,763	'	'	'	'
Issuance of OP Units to Noncontrolling Interests	'	'	'	66,606	'	'	'	'
Issuance Of Long Term Incentive Plan Units Into Noncontrolling Interest	'	'	'	5	'	'	'	'
Equity compensation associated with Units - Limited Partners	'	'	'	5,307	'	'	'	'
Limited Partners	'	'	'	38,641	'	'	'	'
Units - Limited Partners distributions	'	'	'	-25,095	'	'	'	'
Change in carrying value of Redeemable Limited Partners	'	'	'	-20,702	'	'	'	'
Accumulated other comprehensive (loss) income - derivative instruments:	'	'	'	'	'	'	'	'
Unrealized holding gains (losses) arising during the year	-11,772	'	'	'	-11,772	'	'	'
Losses reclassified into earnings from other comprehensive income	-14,678	'	'	'	14,678	'	'	'
Accumulated other comprehensive income (loss) - other instruments:	'	'	'	'	'	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	664	'	'	'	664	'	'	'
Gain on Sale of Securities, Net	0	'	'	'	0	'	'	'
Currency translation adjustments arising during the year	0	'	'	'	0	'	'	'
Net income	881,204	'	'	'	'	844	'	'
Contributions - Noncontrolling Interests - Partially Owned Properties	8,221	'	'	'	'	8,221	'	'
Archstone Acquisition Noncontrolling Interests Partially Owned Properties	'	'	'	'	'	0	'	'
Distributions to Noncontrolling Interests	'	'	'	'	'	-5,131	'	'
Stockholders' Equity, Other	'	'	'	'	'	754	'	'
Balance, end of period at Dec. 31, 2012	'	50,000	7,432,961	159,606	-193,148	77,688	'	'
Payments for Repurchase of Preferred Stock and Preference Stock	0	0	'	'	'	'	150,000	'
Preferred Stock Preference Units Dividend Rate Percentage	'	'	'	'	'	'	6.48%	6.48%
OP Unit Issuance:	'	'	'	'	'	'	'	'
Conversion of OP Units held by Limited Partners into OP Units held by General Partner	'	'	1,699	-1,699	'	'	'	'
Issuance of OP Units	'	'	1,929,868	'	'	'	'	'
Exercise of EQR share options	'	'	17,252	'	'	'	'	'
EQR's Employee Share Purchase Plan (ESPP)	'	'	3,401	'	'	'	'	'
Conversion of EQR restricted shares to LTIP Units	'	'	0	0	'	'	'	'
Share-based employee compensation expense:	'	'	'	'	'	'	'	'
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	'	'	13,264	'	'	'	'	'
EQR share options	'	'	10,514	'	'	'	'	'
EQR ESPP discount	'	'	632	'	'	'	'	'
Offering costs	'	'	-1,047	'	'	'	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	'	0	'	'	'	5,100	'
Net income available to Units - General Partner	'	'	1,826,468	'	'	'	'	'
OP Units - General Partner distributions	'	'	-666,565	'	'	'	'	'
Supplemental Executive Retirement Plan (SERP)	'	'	-422	'	'	'	'	'
Acquisition of Noncontrolling Interests - Partially Owned Properties	'	'	0	'	'	0	'	'
Change in market value of Redeemable Limited Partners	'	'	79,667	'	'	'	'	'
Adjustment for Limited Partners ownership in Operating Partnership	'	'	-35,329	35,329	'	'	'	'
Issuance of OP Units to Noncontrolling Interests	'	'	'	0	'	'	'	'
Issuance Of Long Term Incentive Plan Units Into Noncontrolling Interest	'	'	'	5	'	'	'	'
Equity compensation associated with Units - Limited Partners	'	'	'	13,609	'	'	'	'
Limited Partners	'	'	'	75,278	'	'	'	'
Units - Limited Partners distributions	'	'	'	-26,277	'	'	'	'
Change in carrying value of Redeemable Limited Partners	'	'	'	-44,439	'	'	'	'
Accumulated other comprehensive (loss) income - derivative instruments:	'	'	'	'	'	'	'	'
Unrealized holding gains (losses) arising during the year	18,771	'	'	'	18,771	'	'	'
Losses reclassified into earnings from other comprehensive income	-20,141	'	'	'	20,141	'	'	'
Accumulated other comprehensive income (loss) - other instruments:	'	'	'	'	'	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	583	'	'	'	583	'	'	'
Gain on Sale of Securities, Net	-2,122	'	'	'	-2,122	'	'	'
Currency translation adjustments arising during the year	613	'	'	'	613	'	'	'
Net income	1,905,353	'	'	'	'	-538	'	'
Contributions - Noncontrolling Interests - Partially Owned Properties	27,660	'	'	'	'	27,660	'	'
Archstone Acquisition Noncontrolling Interests Partially Owned Properties	'	'	'	'	'	28,263	'	'
Distributions to Noncontrolling Interests	'	'	'	'	'	-6,490	'	'
Stockholders' Equity, Other	'	'	'	'	'	0	'	'
Balance, end of period at Dec. 31, 2013	'	$50,000	$10,612,363	$211,412	($155,162)	$126,583	'	'

Business

Business	12 Months Ended
	Dec. 31, 2013
Business [Abstract]	'
Business	'
	1	Business
	Equity Residential (“EQR”), a Maryland real estate investment trust (“REIT”) formed in March 1993, is an S&P 500 company focused on the acquisition, development and management of high quality apartment properties in top United States growth markets. ERP Operating Limited Partnership ("ERPOP"), an Illinois limited partnership, was formed in May 1993 to conduct the multifamily residential property business of Equity Residential. EQR has elected to be taxed as a REIT. References to the "Company," "we," "us" or "our" mean collectively EQR, ERPOP and those entities/subsidiaries owned or controlled by EQR and/or ERPOP. References to the "Operating Partnership" mean collectively ERPOP and those entities/subsidiaries owned or controlled by ERPOP. Unless otherwise indicated, the notes to consolidated financial statements apply to both the Company and the Operating Partnership.
	EQR is the general partner of, and as of December 31, 2013 owned an approximate 96.2% ownership interest in, ERPOP. All of the Company's property ownership, development and related business operations are conducted through the Operating Partnership and EQR has no material assets or liabilities other than its investment in ERPOP. EQR issues public equity from time to time but does not have any indebtedness as all debt is incurred by the Operating Partnership. The Operating Partnership holds substantially all of the assets of the Company, including the Company's ownership interests in its joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity.
	As of December 31, 2013, the Company, directly or indirectly through investments in title holding entities, owned all or a portion of 390 properties located in 12 states and the District of Columbia consisting of 109,855 apartment units. The ownership breakdown includes (table does not include various uncompleted development properties):
			Properties	Apartment Units
	Wholly Owned Properties		362	98,468
	Master-Leased Properties – Consolidated		3	853
	Partially Owned Properties – Consolidated		19	3,752
	Partially Owned Properties – Unconsolidated		4	1,669
	Military Housing		2	5,113
			390	109,855
	The “Wholly Owned Properties” are accounted for under the consolidation method of accounting. The "Master-Leased Properties – Consolidated" are wholly owned by the Company but the entire project is leased to a third party corporate housing provider. These properties are consolidated and reflected as real estate assets while the master leases are accounted for as operating leases. The “Partially Owned Properties – Consolidated” are controlled by the Company but have partners with noncontrolling interests and are accounted for under the consolidation method of accounting. The “Partially Owned Properties – Unconsolidated” are controlled by the Company's partners but the Company has noncontrolling interests and are accounted for under the equity method of accounting. The “Military Housing” properties consist of investments in limited liability companies that, as a result of the terms of the operating agreements, are accounted for as management contract rights with all fees recognized as fee and asset management revenue.
	The Company maintains long-term ground leases for 13 operating properties and one of its wholly owned development properties and land parcels. The Company owns the building and improvements and leases the land underlying the improvements under long-term ground leases. The leases expire beginning in 2026 and running through 2110. These properties are consolidated and reflected as real estate assets while the ground leases are accounted for as operating leases.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2	Summary of Significant Accounting Policies
	Basis of Presentation
	Due to the Company’s ability as general partner to control either through ownership or by contract the Operating Partnership and its subsidiaries, the Operating Partnership and each such subsidiary has been consolidated with the Company for financial reporting purposes, except for one unconsolidated development property, four unconsolidated operating properties and our military housing properties. The consolidated financial statements also include all variable interest entities for which the Company is the primary beneficiary.
	Noncontrolling interests represented by EQR's indirect 1% interest in various entities are immaterial and have not been accounted for in the Consolidated Financial Statements of the Operating Partnership. In addition, certain amounts due from EQR for its 1% interest in various entities have not been reflected in the consolidated balance sheets of the Operating Partnership since such amounts are immaterial.
	Real Estate Assets and Depreciation of Investment in Real Estate
	Effective for business combinations on or after January 1, 2009, an acquiring entity is required to recognize all assets acquired and liabilities assumed in a transaction at the acquisition-date fair value with limited exceptions. In addition, an acquiring entity is required to expense acquisition-related costs as incurred, value noncontrolling interests at fair value at the acquisition date and expense restructuring costs associated with an acquired business.
	The Company allocates the purchase price of properties to net tangible and identified intangible assets acquired based on their fair values. In making estimates of fair values for purposes of allocating purchase price, the Company utilizes a number of sources, including independent appraisals that may be obtained in connection with the acquisition or financing of the respective property, our own analysis of recently acquired and existing comparable properties in our portfolio and other market data. The Company also considers information obtained about each property as a result of its pre-acquisition due diligence, marketing and leasing activities in estimating the fair value of the tangible and intangible assets/liabilities acquired. The Company allocates the purchase price of acquired real estate to various components as follows:
	•	Land – Based on actual purchase price adjusted to fair value (as necessary) if acquired separately or market research/comparables if acquired with an operating property.
	•	Furniture, Fixtures and Equipment – Ranges between $3,000 and $13,000 per apartment unit acquired as an estimate of the fair value of the appliances and fixtures inside an apartment unit. The per-apartment unit amount applied depends on the type of apartment building acquired. Depreciation is calculated on the straight-line method over an estimated useful life of five to ten years.
	•	Lease Intangibles – The Company considers the value of acquired in-place leases and above/below market leases and the amortization period is the average remaining term of each respective acquired lease. In-place residential leases' average term at acquisition approximates six months. See Note 4 for more information on above and below market leases.
	•	Other Intangible Assets – The Company considers whether it has acquired other intangible assets, including any customer relationship intangibles and the amortization period is the estimated useful life of the acquired intangible asset.
	•	Building – Based on the fair value determined on an “as-if vacant” basis. Depreciation is calculated on the straight-line method over an estimated useful life of thirty years.
	•	Site Improvements – Based on replacement cost, which approximates fair value. Depreciation is calculated on the straight-line method over an estimated useful life of eight years.
	•	Long-Term Debt – The Company calculates the fair value by discounting the remaining contractual cash flows on each instrument at the current market rate for those borrowings.
	Replacements inside an apartment unit such as appliances and carpeting are depreciated over an estimated useful life of five to ten years. Expenditures for ordinary maintenance and repairs are expensed to operations as incurred and significant renovations and improvements that improve and/or extend the useful life of the asset are capitalized over their estimated useful life, generally five to fifteen years. Initial direct leasing costs are expensed as incurred as such expense approximates the deferral and amortization of initial direct leasing costs over the lease terms. Property sales or dispositions are recorded when title transfers to unrelated third parties, contingencies have been removed and sufficient cash consideration has been received by the Company. Upon disposition, the related costs and accumulated depreciation are removed from the respective accounts. Any gain or loss on sale is recognized in accordance with accounting principles generally accepted in the United States.
	The Company classifies real estate assets as real estate held for disposition when it is certain a property will be disposed of (see further discussion below).
	The Company classifies properties under development and/or expansion and properties in the lease-up phase (including land) as construction-in-progress until construction has been completed and all certificates of occupancy permits have been obtained.
	Impairment of Long-Lived Assets
	The Company periodically evaluates its long-lived assets, including its investments in real estate, for indicators of impairment. The judgments regarding the existence of impairment indicators are based on factors such as operational performance, market conditions and legal and environmental concerns, as well as the Company’s ability to hold and its intent with regard to each asset. Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted. If impairment indicators exist, the Company performs the following:
	▪	For long-lived assets to be held and used, the Company compares the expected future undiscounted cash flows for the long-lived asset against the carrying amount of that asset. If the sum of the estimated undiscounted cash flows is less than the carrying amount of the asset, the Company would record an impairment loss for the difference between the estimated fair value and the carrying amount of the asset.
	▪	For long-lived assets to be disposed of, an impairment loss is recognized when the estimated fair value of the asset, less the estimated cost to sell, is less than the carrying amount of the asset measured at the time that the Company has determined it will sell the asset. Long-lived assets held for disposition and the related liabilities are separately reported, with the long-lived assets reported at the lower of their carrying amounts or their estimated fair values, less their costs to sell, and are not depreciated after reclassification to real estate held for disposition.
	Cost Capitalization
	See the Real Estate Assets and Depreciation of Investment in Real Estate section for a discussion of the Company’s policy with respect to capitalization vs. expensing of fixed asset/repair and maintenance costs. In addition, the Company capitalizes an allocation of the payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of major capital and/or renovation projects. These costs are reflected on the balance sheets as increases to depreciable property.
	For all development projects, the Company uses its professional judgment in determining whether such costs meet the criteria for capitalization or must be expensed as incurred. The Company capitalizes interest, real estate taxes and insurance and payroll and associated costs for those individuals directly responsible for and who spend their time on development activities, with capitalization ceasing no later than 90 days following issuance of the certificate of occupancy. These costs are reflected on the balance sheets as construction-in-progress for each specific property. The Company expenses as incurred all payroll costs of on-site employees working directly at our properties, except as noted above on our development properties prior to certificate of occupancy issuance and on specific major renovations at selected properties when additional incremental employees are hired.
	During the years ended December 31, 2013, 2012 and 2011, the Company capitalized $16.5 million, $14.3 million and $11.6 million, respectively, of payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of development activities as well as major capital and/or renovation projects.
	Cash and Cash Equivalents
	The Company considers all demand deposits, money market accounts and investments in certificates of deposit and repurchase agreements purchased with a maturity of three months or less at the date of purchase to be cash equivalents. The Company maintains its cash and cash equivalents at financial institutions. The combined account balances at one or more institutions typically exceed the Federal Depository Insurance Corporation (“FDIC”) insurance coverage, and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes that the risk is not significant, as the Company does not anticipate the financial institutions’ non-performance.
	Investment Securities
	Investment securities are included in other assets in the consolidated balance sheets. These securities are classified as held-to-maturity and carried at amortized cost if management has the positive intent and ability to hold the securities to maturity. Otherwise, the securities are classified as available-for-sale and carried at estimated fair value with unrealized gains and losses included in accumulated other comprehensive (loss), a separate component of shareholders’ equity/partners' capital. As of December 31, 2013, the Company did not hold any investment securities.
	Deferred Financing Costs
	Deferred financing costs include fees and costs incurred to obtain the Company’s lines of credit and long-term financings. These costs are amortized over the terms of the related debt. Unamortized financing costs are written off when debt is retired before the maturity date. The accumulated amortization of such deferred financing costs was $33.4 million and $32.2 million at December 31, 2013 and 2012, respectively.
	Fair Value of Financial Instruments, Including Derivative Instruments
	The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments. The Company, where possible, bases the fair values of its financial instruments, including its derivative instruments, on listed market prices and third party quotes. Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments.
	In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company seeks to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments. The Company may also use derivatives to manage its exposure to foreign exchange rates or manage commodity prices in the daily operations of the business.
	The Company has a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors. When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from these instruments nor does it anticipate any material adverse effect on its net income or financial position in the future from the use of derivatives it currently has in place.
	The Company recognizes all derivatives as either assets or liabilities in the consolidated balance sheets and measures those instruments at fair value. In addition, fair value adjustments will affect either shareholders’ equity/partners' capital or net income depending on whether the derivative instruments qualify as a hedge for accounting purposes and, if so, the nature of the hedging activity. When the terms of an underlying transaction are modified, or when the underlying transaction is terminated or completed, all changes in the fair value of the instrument are marked-to-market with changes in value included in net income each period until the instrument matures. Any derivative instrument used for risk management that does not meet the hedging criteria is marked-to-market each period. The Company does not use derivatives for trading or speculative purposes.
	Revenue Recognition
	Rental income attributable to leases is recorded on a straight-line basis, which is not materially different than if it were recorded when due from residents and recognized monthly as it was earned. Leases entered into between a resident and a property for the rental of an apartment unit are generally year-to-year, renewable upon consent of both parties on an annual or monthly basis. Retail/commercial leases generally have five to ten year lease terms with market based renewal options. Fee and asset management revenue and interest income are recorded on an accrual basis.
	Share-Based Compensation
	The Company expenses share-based compensation such as restricted shares and share options. Any common share of beneficial interest, $0.01 par value per share (the "Common Shares") issued pursuant to EQR's incentive equity compensation and employee share purchase plans will result in ERPOP issuing units of limited partnership interest ("OP Units") to EQR on a one-for-one basis, with ERPOP receiving the net cash proceeds of such issuances.
	The fair value of the option grants are recognized over the requisite service/vesting period of the options. The fair value for the Company's share options was estimated at the time the share options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions:
			2013		2012	2011
	Expected volatility (1)		26.90%		27.40%	27.10%
	Expected life (2)		5 years		5 years	5 years
	Expected dividend yield (3)		4.12%		4.35%	4.56%
	Risk-free interest rate (4)		0.84%		0.71%	2.27%
	Option valuation per share		$7.90		$8.54	$8.36
	-1	Expected volatility – Estimated based on the historical ten-year volatility of EQR’s share price measured on a monthly basis.
	-2	Expected life – Approximates the actual weighted average life of all share options granted since the Company went public in 1993.
	-3	Expected dividend yield – Calculated by averaging the historical annual yield on EQR shares for a period matching the expected life of each grant, with the annual yield calculated by dividing actual dividends by the average price of EQR’s shares in a given year.
	-4	Risk-free interest rate – The most current U.S. Treasury rate available prior to the grant date for a period matching the expected life of each grant.
	The valuation method and assumptions are the same as those the Company used in accounting for option expense in its consolidated financial statements. The Black-Scholes option valuation model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. This model is only one method of valuing options. Because the Company’s share options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, the actual value of the options to the recipient may be significantly different.
	Income and Other Taxes
	Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level. Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes. The Company has elected Taxable REIT Subsidiary (“TRS”) status for certain of its corporate subsidiaries and as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses.
	Deferred tax assets and liabilities applicable to the TRS are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled. The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted. The Company’s deferred tax assets are generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities. As of December 31, 2013, the Company has recorded a deferred tax asset of approximately $79.6 million, which is fully offset by a valuation allowance due to the uncertainty in forecasting future TRS taxable income.
	The Company provided for income, franchise and excise taxes allocated as follows in the consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011 (amounts in thousands):
			Year Ended December 31,
			2013			2012		2011
	Income and other tax expense (benefit) (1)		$	1,169		$	514	$	706
	Discontinued operations, net (2)		449			34		(221		)
	Provision for income, franchise and excise taxes (3)		$	1,618		$	548	$	485
	-1	Primarily includes state and local income, excise and franchise taxes.
	-2	Primarily represents federal income taxes (recovered) on the gains on sales of land parcels and condominium units owned by a TRS and included in discontinued operations. Also represents state and local income, excise and franchise taxes on operating properties sold and included in discontinued operations.
-3	All provisions for income tax amounts are current and none are deferred.
The Company’s TRSs have approximately $63.1 million of NOL carryforwards available as of January 1, 2014 that will expire between 2028 and 2032.
During the years ended December 31, 2013, 2012 and 2011, the Company’s tax treatment of dividends and distributions were as follows:
		Year Ended December 31,
		2013			2012		2011
Tax treatment of dividends and distributions:
Ordinary dividends		$	0.662		$	1.375	$	0.667
Qualified dividends		0.05			—		—
Long-term capital gain		0.87			0.253		0.629
Unrecaptured section 1250 gain		0.268			0.152		0.284
Dividends and distributions declared per
Common Share/Unit outstanding		$	1.85		$	1.78	$	1.58
The cost of land and depreciable property, net of accumulated depreciation, for federal income tax purposes as of December 31, 2013 and 2012 was approximately $15.2 billion and $11.2 billion, respectively.
Noncontrolling Interests
A noncontrolling interest in a subsidiary (minority interest) is in most cases an ownership interest in the consolidated entity that should be reported as equity in the consolidated financial statements and separate from the parent company's equity. In addition, consolidated net income is required to be reported at amounts that include the amounts attributable to both the parent and the noncontrolling interest and the amount of consolidated net income attributable to the parent and the noncontrolling interest are required to be disclosed on the face of the consolidated statements of operations and comprehensive income. See Note 3 for further discussion.
Operating Partnership: Net income is allocated to noncontrolling interests based on their respective ownership percentage of the Operating Partnership. The ownership percentage is calculated by dividing the number of OP Units held by the noncontrolling interests by the total OP Units held by the noncontrolling interests and EQR. Issuance of additional Common Shares and OP Units changes the ownership interests of both the noncontrolling interests and EQR. Such transactions and the related proceeds are treated as capital transactions.
Partially Owned Properties: The Company reflects noncontrolling interests in partially owned properties on the balance sheet for the portion of properties consolidated by the Company that are not wholly owned by the Company. The earnings or losses from those properties attributable to the noncontrolling interests are reflected as noncontrolling interests in partially owned properties in the consolidated statements of operations and comprehensive income.
Partners' Capital
The "Limited Partners" of ERPOP include various individuals and entities that contributed their properties to ERPOP in exchange for OP Units. The "General Partner" of ERPOP is EQR. Net income is allocated to the Limited Partners based on their respective ownership percentage of the Operating Partnership. The ownership percentage is calculated by dividing the number of OP Units held by the Limited Partners by the total OP Units held by the Limited Partners and the General Partner. Issuance of additional Common Shares and OP Units changes the ownership interests of both the Limited Partners and EQR. Such transactions and the related proceeds are treated as capital transactions.
Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners
The Company classifies Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners in the mezzanine section of the consolidated balance sheets for the portion of OP Units that EQR is required, either by contract or securities law, to deliver registered Common Shares to the exchanging OP Unit holder. The redeemable noncontrolling interest units / redeemable limited partner units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. See Note 3 for further discussion.
Use of Estimates
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.
Reclassifications
Certain reclassifications considered necessary for a fair presentation have been made to the prior period financial statements in order to conform to the current year presentation. These reclassifications have not changed the results of operations or equity/capital.
Other
The Company is the controlling partner in various consolidated partnerships owning 19 properties and 3,752 apartment units and various completed and uncompleted development properties having a noncontrolling interest book value of $126.6 million at December 31, 2013. The Company is required to make certain disclosures regarding noncontrolling interests in consolidated limited-life subsidiaries. Of the consolidated entities described above, the Company is the controlling partner in limited-life partnerships owning six properties having a noncontrolling interest deficit balance of $9.8 million. These six partnership agreements contain provisions that require the partnerships to be liquidated through the sale of their assets upon reaching a date specified in each respective partnership agreement. The Company, as controlling partner, has an obligation to cause the property owning partnerships to distribute the proceeds of liquidation to the Noncontrolling Interests in these Partially Owned Properties only to the extent that the net proceeds received by the partnerships from the sale of their assets warrant a distribution based on the partnership agreements. As of December 31, 2013, the Company estimates the value of Noncontrolling Interest distributions for these six properties would have been approximately $51.2 million (“Settlement Value”) had the partnerships been liquidated. This Settlement Value is based on estimated third party consideration realized by the partnerships upon disposition of the six Partially Owned Properties and is net of all other assets and liabilities, including yield maintenance on the mortgages encumbering the properties, that would have been due on December 31, 2013 had those mortgages been prepaid. Due to, among other things, the inherent uncertainty in the sale of real estate assets, the amount of any potential distribution to the Noncontrolling Interests in the Company's Partially Owned Properties is subject to change. To the extent that the partnerships' underlying assets are worth less than the underlying liabilities, the Company has no obligation to remit any consideration to the Noncontrolling Interests in these Partially Owned Properties.
Effective January 1, 2011, companies are required to separately disclose purchases, sales, issuances and settlements on a gross basis in the reconciliation of recurring Level 3 fair value measurements. This does not have a material effect on the Company’s consolidated results of operations or financial position. See Note 9 for further discussion.
Effective January 1, 2012, companies are required to separately disclose the amounts and reasons for any transfers of assets and liabilities into and out of Level 1 and Level 2 of the fair value hierarchy. For fair value measurements using significant unobservable inputs (Level 3), companies are required to disclose quantitative information about the significant unobservable inputs used for all Level 3 measurements and a description of the Company's valuation processes in determining fair value. In addition, companies are required to provide a qualitative discussion about the sensitivity of recurring Level 3 measurements to changes in the unobservable inputs disclosed, including the interrelationship between inputs. Companies are also required to disclose information about when the current use of a non-financial asset measured at fair value differs from its highest and best use and the hierarchy classification for items whose fair value is not recorded on the balance sheet but is disclosed in the notes. This does not have a material effect on the Company's consolidated results of operations or financial position. See Notes 4 and 9 for further discussion.
Effective January 1, 2013, companies are required to report, in one place, information about reclassifications out of accumulated other comprehensive income ("AOCI"). Companies are also required to report changes in AOCI balances. For significant items reclassified out of AOCI to net income in their entirety in the same reporting period, reporting is required about the effect of the reclassifications on the respective line items in the statement where net income is presented. For items that are not reclassified to net income in their entirety in the same reporting period, a cross reference to other disclosures currently required under US GAAP is required in the notes. This does not have a material effect on the Company's consolidated results of operations or financial position. See Note 9 for further discussion.
Effective January 1, 2014, companies will be required to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount a company agreed to pay on the basis of its arrangement among its co-obligors and any additional amount a company expects to pay on behalf of its co-obligors. Companies will also be required to disclose the nature and amount of the obligation as well as other information about those obligations. The Company does not expect that this will have a material effect on its consolidated results of operations or financial position.
Effective January 1, 2009, issuers of certain convertible debt instruments that may be settled in cash on conversion were required to separately account for the liability and equity components of the instrument in a manner that reflects each issuer's nonconvertible debt borrowing rate. As the Company was required to apply this retrospectively, the accounting for its $650.0 million 3.85% convertible unsecured notes that were issued in August 2006 with a final maturity in August 2026 was affected. On August 18, 2011, the Company redeemed these notes at par ($482.5 million was outstanding on August 18, 2011) and no premium was paid. The Company recognized $11.8 million in interest expense related to the stated coupon rate of 3.85% for the year ended December 31, 2011. The amount of the conversion option as of the date of issuance calculated by the Company using a 5.80% effective interest rate was $44.3 million and was amortized to interest expense over the expected life of the convertible notes (through the first put date on August 18, 2011). Total amortization of the cash discount and conversion option discount on the unsecured notes resulted in a reduction to earnings of approximately $5.0 million or $0.02 per share/Unit for the year ended December 31, 2011. In addition, the Company decreased the January 1, 2009 balance of retained earnings (included in general partner's capital in the Operating Partnership's financial statements) by $27.0 million, decreased the January 1, 2009 balance of notes by $17.3 million and increased the January 1, 2009 balance of paid in capital (included in general partner's capital in the Operating Partnership's financial statements) by $44.3 million.

Equity_Capital_and_Other_Inter

Equity, Capital and Other Interests	12 Months Ended
	Dec. 31, 2013
Equity, Capital and other Interests [Abstract]	'
Equity Capital And Other Interests [Text Block]	'
	3	Equity, Capital and Other Interests
	Equity and Redeemable Noncontrolling Interests of Equity Residential
	The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and Long-Term Incentive Plan (“LTIP”) Units) for the years ended December 31, 2013, 2012 and 2011:
			2013			2012				2011
	Common Shares
	Common Shares outstanding at January 1,		325,054,654			297,508,185				290,197,242
	Common Shares Issued:
	Conversion of OP Units		67,939			675,817				341,594
	Issuance of Common Shares		34,468,085			25,023,919				3,866,666
	Exercise of share options		586,017			1,608,427				2,945,948
	Employee Share Purchase Plan (ESPP)		73,468			110,054				113,107
	Restricted share grants, net		229,097			128,252				145,616
	Common Shares Other:
	Conversion of restricted shares to LTIP Units		—			—				(101,988	)
	Common Shares outstanding at December 31,		360,479,260			325,054,654				297,508,185
	Units
	Units outstanding at January 1,		13,968,758			13,492,543				13,612,037
	LTIP Units, net		279,557			70,235				120,112
	OP Units issued through acquisitions		—			1,081,797				—
	Conversion of restricted shares to LTIP Units		—			—				101,988
	Conversion of OP Units to Common Shares		(67,939	)		(675,817		)		(341,594	)
	Units outstanding at December 31,		14,180,376			13,968,758				13,492,543
	Total Common Shares and Units outstanding at December 31,		374,659,636			339,023,412				311,000,728
	Units Ownership Interest in Operating Partnership		3.8	%		4.1		%		4.3	%
	OP Units Issued:
	Acquisitions – per unit		—				$61.57			—
	Acquisitions – valuation		—			$66.6 million				—
	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 LTIP Units, are collectively referred to as the “Noncontrolling Interests – Operating Partnership”. Subject to certain exceptions (including the “book-up” requirements of LTIP Units), the Noncontrolling Interests – Operating Partnership may exchange their Units with EQR for Common Shares on a one-for-one basis. The carrying value of the Noncontrolling Interests – Operating Partnership (including redeemable interests) is allocated based on the number of Noncontrolling Interests – Operating Partnership Units in total in proportion to the number of Noncontrolling Interests – Operating Partnership Units in total plus the number of Common Shares. Net income is allocated to the Noncontrolling Interests – Operating Partnership based on the weighted average ownership percentage during the period.
	The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Noncontrolling Interests – Operating Partnership Units requesting an exchange of their OP Units with EQR. Once the Operating Partnership elects not to redeem the Noncontrolling Interests – Operating Partnership Units for cash, EQR is obligated to deliver Common Shares to the exchanging holder of the Noncontrolling Interests – Operating Partnership Units.
	The Noncontrolling Interests – Operating Partnership Units are classified as either mezzanine equity or permanent equity. If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Noncontrolling Interests – Operating Partnership are differentiated and referred to as “Redeemable Noncontrolling Interests – Operating Partnership”. Instruments that require settlement in registered shares can not be classified in permanent equity as it is not always completely within an issuer’s control to deliver registered shares. Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet. The Redeemable Noncontrolling Interests – Operating Partnership are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Noncontrolling Interests – Operating Partnership Units that are classified in permanent equity at December 31, 2013 and 2012.
	The carrying value of the Redeemable Noncontrolling Interests – Operating Partnership is allocated based on the number of Redeemable Noncontrolling Interests – Operating Partnership Units in proportion to the number of Noncontrolling Interests – Operating Partnership Units in total. Such percentage of the total carrying value of Units which is ascribed to the Redeemable Noncontrolling Interests – Operating Partnership is then adjusted to the greater of carrying value or fair market value as described above. As of December 31, 2013, the Redeemable Noncontrolling Interests – Operating Partnership have a redemption value of approximately $363.1 million, which represents the value of Common Shares that would be issued in exchange with the Redeemable Noncontrolling Interests – Operating Partnership Units.
	The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
			2013				2012				2011
	Balance at January 1,		$	398,372			$	416,404			$	383,540
	Change in market value		(79,667		)		(38,734		)		22,714
	Change in carrying value		44,439				20,702				10,150
	Balance at December 31,		$	363,144			$	398,372			$	416,404
	Net proceeds from EQR Common Share and Preferred Share (see definition below) offerings are contributed by EQR to ERPOP. In return for those contributions, EQR receives a number of OP Units in ERPOP equal to the number of Common Shares it has issued in the equity offering (or in the case of a preferred equity offering, a number of preference units in ERPOP equal in number and having the same terms as the Preferred Shares issued in the equity offering). As a result, the net offering proceeds from Common Shares and Preferred Shares are allocated between shareholders’ equity and Noncontrolling Interests – Operating Partnership to account for the change in their respective percentage ownership of the underlying equity of ERPOP.
	The Company’s declaration of trust authorizes it to issue up to $100,000,000 preferred shares of beneficial interest, $0.01 par value per share (the “Preferred Shares”), with specific rights, preferences and other attributes as the Board of Trustees may determine, which may include preferences, powers and rights that are senior to the rights of holders of the Company’s Common Shares.
	The following table presents the Company’s issued and outstanding Preferred Shares as of December 31, 2013 and 2012:
									Amounts in thousands
			Redemption		Annual				December 31, 2013				31-Dec-12
			Date (1)		Dividend per
					Share (2)
	Preferred Shares of beneficial interest, $0.01 par value;
	100,000,000 shares authorized:
	8.29% Series K Cumulative Redeemable Preferred; liquidation		12/10/26			$4.14			$	50,000			$	50,000
	value $50 per share; 1,000,000 shares issued and outstanding
	at December 31, 2013 and December 31, 2012
									$	50,000			$	50,000
	-1	On or after the redemption date, redeemable preferred shares may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any.
	-2	Dividends on Preferred Shares are payable quarterly.
	Capital and Redeemable Limited Partners of ERP Operating Limited Partnership
	The following tables present the changes in the Operating Partnership's issued and outstanding Units and in the limited partners' Units for the years ended December 31, 2013, 2012 and 2011:
			2013			2012				2011
	General and Limited Partner Units
	General and Limited Partner Units outstanding at January 1,		339,023,412			311,000,728				303,809,279
	Issued to General Partner:
	Issuance of OP Units		34,468,085			25,023,919				3,866,666
	Exercise of EQR share options		586,017			1,608,427				2,945,948
	EQR's Employee Share Purchase Plan (ESPP)		73,468			110,054				113,107
	EQR's restricted share grants, net		229,097			128,252				145,616
	Issued to Limited Partners:
LTIP Units, net		279,557			70,235				120,112
OP Units issued through acquisitions		—			1,081,797				—
General and Limited Partner Units outstanding at December 31,		374,659,636			339,023,412				311,000,728
Limited Partner Units
Limited Partner Units outstanding at January 1,		13,968,758			13,492,543				13,612,037
Limited Partner LTIP Units, net		279,557			70,235				120,112
Limited Partner OP Units issued through acquisitions		—			1,081,797				—
Conversion of EQR restricted shares to LTIP Units		—			—				101,988
Conversion of Limited Partner OP Units to EQR Common Shares		(67,939	)		(675,817		)		(341,594	)
Limited Partner Units outstanding at December 31,		14,180,376			13,968,758				13,492,543
Limited Partner Units Ownership Interest in Operating Partnership		3.8	%		4.1		%		4.3	%
Limited Partner OP Units Issued:
Acquisitions – per unit		—				$61.57			—
Acquisitions – valuation		—			$66.6 million				—
The Limited Partners of the Operating Partnership as of December 31, 2013 include various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units, as well as the equity positions of the holders of LTIP Units. Subject to certain exceptions (including the “book-up” requirements of LTIP Units), Limited Partners may exchange their Units with EQR for Common Shares on a one-for-one basis. The carrying value of the Limited Partner Units (including redeemable interests) is allocated based on the number of Limited Partner Units in total in proportion to the number of Limited Partner Units in total plus the number of General Partner Units. Net income is allocated to the Limited Partner Units based on the weighted average ownership percentage during the period.
The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Limited Partner Units requesting an exchange of their OP Units with EQR. Once the Operating Partnership elects not to redeem the Limited Partner Units for cash, EQR is obligated to deliver Common Shares to the exchanging limited partner.
The Limited Partner Units are classified as either mezzanine equity or permanent equity. If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Limited Partner Units are differentiated and referred to as “Redeemable Limited Partner Units”. Instruments that require settlement in registered shares can not be classified in permanent equity as it is not always completely within an issuer's control to deliver registered shares. Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet. The Redeemable Limited Partner Units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Limited Partner Units that are classified in permanent equity at December 31, 2013 and 2012.
The carrying value of the Redeemable Limited Partner Units is allocated based on the number of Redeemable Limited Partner Units in proportion to the number of Limited Partner Units in total. Such percentage of the total carrying value of Limited Partner Units which is ascribed to the Redeemable Limited Partner Units is then adjusted to the greater of carrying value or fair market value as described above. As of December 31, 2013, the Redeemable Limited Partner Units have a redemption value of approximately $363.1 million, which represents the value of Common Shares that would be issued in exchange with the Redeemable Limited Partner Units.
The following table presents the changes in the redemption value of the Redeemable Limited Partners for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
		2013				2012				2011
Balance at January 1,		$	398,372			$	416,404			$	383,540
Change in market value		(79,667		)		(38,734		)		22,714
Change in carrying value		44,439				20,702				10,150
Balance at December 31,		$	363,144			$	398,372			$	416,404
EQR contributes all net proceeds from its various equity offerings (including proceeds from exercise of options for Common Shares) 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).
The following table presents the Operating Partnership's issued and outstanding “Preference Units” as of December 31, 2013 and 2012:
								Amounts in thousands
		Redemption		Annual				December 31, 2013				31-Dec-12
		Date (1)		Dividend per
				Unit (2)
Preference Units:
8.29% Series K Cumulative Redeemable Preference Units;		12/10/26			$4.14			$	50,000			$	50,000
liquidation value $50 per unit; 1,000,000 units issued and
outstanding at December 31, 2013 and December 31, 2012
								$	50,000			$	50,000
-1	On or after the redemption date, redeemable preference units may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares.
-2	Dividends on Preference Units are payable quarterly.
Other
An unspecified amount of equity and debt securities remains available for issuance by EQR and ERPOP under a universal shelf registration statement that automatically became effective upon filing with the SEC on July 30, 2013 and expires on July 30, 2016. In July 2013, the Board of Trustees also approved an increase to the amount of shares which may be offered under the ATM (see definition below) program to 13.0 million Common Shares and extended the program maturity to July 2016. 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).
On February 27, 2013, the Company issued 34,468,085 Common Shares to an affiliate of Lehman Brothers Holdings Inc. as partial consideration for the portion of the Archstone Portfolio acquired by the Company (as discussed in Note 4 below). The shares had a total value of $1.9 billion based on the February 27, 2013 closing price of EQR Common Shares of $55.99 per share. Concurrent with this transaction, ERPOP issued 34,468,085 OP Units to EQR. On March 7, 2013, EQR filed a shelf registration statement relating to the resale of these shares by the selling shareholders.
On November 28, 2012, as a partial source of funding for the Archstone Acquisition (see definition below), EQR priced the issuance of 21,850,000 Common Shares at a price of $54.75 per share for total consideration of approximately $1.2 billion, after deducting underwriting commissions of $35.9 million. Concurrent with this transaction, ERPOP issued 21,850,000 OP Units to EQR.
In September 2009, the Company announced the establishment of an At-The-Market (“ATM”) share offering program which would allow EQR to sell up to 17.0 million Common Shares from time to time over the next three years (later increased by 5.7 million Common Shares and extended to February 2014) into the existing trading market at current market prices as well as through negotiated transactions. Per the terms of ERPOP's partnership agreement, EQR contributes the net proceeds from 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). On July 30, 2013, the Company filed a new universal shelf registration statement to replace its existing universal shelf registration statement, which expired October 15, 2013. The Board of Trustees also approved an increase to the amount of shares which may be offered under the ATM program to 13.0 million Common Shares and extended the program maturity to July 2016. EQR has not issued any shares under this program since September 14, 2012.
During the year ended December 31, 2012, EQR issued approximately 3.2 million Common Shares at an average price of $60.59 per share for total consideration of approximately $192.3 million through the ATM program. Concurrent with these transactions, ERPOP issued approximately 3.2 million OP Units to EQR. During the year ended December 31, 2011, EQR issued approximately 3.9 million Common Shares at an average price of $52.23 per share for total consideration of approximately $201.9 million through the ATM program. Concurrent with these transactions, ERPOP issued approximately 3.9 million OP Units to EQR. As of December 31, 2011, transactions to issue approximately 0.5 million of the 3.9 million Common Shares had not yet settled. As of December 31, 2011, the Company increased the number of Common Shares issued and outstanding by this amount and recorded a receivable of approximately $28.5 million included in other assets on the consolidated balance sheets.
On June 16, 2011, the shareholders of EQR approved the Company's 2011 Share Incentive Plan, as amended (the “2011 Plan”). The 2011 Plan reserved 12,980,741 Common Shares for issuance. In conjunction with the approval of the 2011 Plan, no further awards may be granted under the 2002 Share Incentive Plan. The 2011 Plan expires on June 16, 2021. See Note 12 for further discussion.
EQR has a share repurchase program authorized by the Board of Trustees under which it previously had authorization to repurchase up to $464.6 million of its shares. Effective July 30, 2013, the Board of Trustees approved an increase and modification to the Company's share repurchase program to allow for the potential repurchase of up to 13.0 million Common Shares. No shares were repurchased during the years ended December 31, 2013, 2012 and 2011.
On August 20, 2012, the Company redeemed its Series N Cumulative Redeemable Preferred Shares for cash consideration of $150.0 million plus accrued dividends through the redemption date. Concurrent with this transaction, the Operating Partnership redeemed its corresponding Series N Preference Units. The Company recorded the write-off of approximately $5.1 million in original issuance costs as a premium on the redemption of Preferred Shares/Preference Units.
On April 18, 2012, the Operating Partnership issued 1,081,797 OP Units having a value of $66.6 million (based on the closing price for Common Shares of $61.57 on such date) as partial consideration for the acquisition of one rental property.
During the year ended December 31, 2012, the Company acquired all of its partner's interest in one consolidated partially owned land parcel for no cash consideration. In conjunction with this transaction, the Company increased paid in capital (included in general partner's capital in the Operating Partnership's financial statements) by $1.3 million and reduced Noncontrolling Interests – Partially Owned Properties by $1.3 million.
During the year ended December 31, 2011, the Company acquired all of its partners' interests in three consolidated partially owned properties consisting of 1,351 apartment units for $12.8 million. In conjunction with these transactions, the Company reduced paid in capital (included in general partner's capital in the Operating Partnership's financial statements) by $4.8 million and Noncontrolling Interests – Partially Owned Properties by $8.0 million.
See Note 6 for a discussion of the Noncontrolling Interests assumed in conjunction with the acquisition of Archstone.

Real_Estate

Real Estate	12 Months Ended
	Dec. 31, 2013
Real Estate [Abstract]	'
Real Estate Disclosure [Text Block]	'
	4	Real Estate and Lease Intangibles
	The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of December 31, 2013 and 2012 (amounts in thousands):
			2013				2012
	Land		$	6,192,512			$	4,554,912
	Depreciable property:
	Buildings and improvements		17,509,609				14,135,740
	Furniture, fixtures and equipment		1,214,220				1,343,765
	In-Place lease intangibles		502,218				232,439
	Projects under development:
	Land		353,574				210,632
	Construction-in-progress		635,293				177,118
	Land held for development:
	Land		341,389				294,868
	Construction-in-progress		52,133				58,955
	Investment in real estate		26,800,948				21,008,429
	Accumulated depreciation		(4,807,709		)		(4,912,221		)
	Investment in real estate, net		$	21,993,239			$	16,096,208
	The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of December 31, 2013 (amounts in thousands):
	Description		Balance Sheet Location		Value
	Assets
	Ground lease intangibles – below market		Other Assets		$	178,251
	Retail lease intangibles – above market		Other Assets		1,260
	Lease intangible assets				179,511
	Accumulated amortization				(4,364		)
	Lease intangible assets, net				$	175,147
	Liabilities
	Ground lease intangibles – above market		Other Liabilities		$	2,400
	Retail lease intangibles – below market		Other Liabilities		5,500
	Lease intangible liabilities				7,900
	Accumulated amortization				(1,161		)
	Lease intangible liabilities, net				$	6,739
	During the year ended December 31, 2013, the Company amortized approximately $3.6 million of above and below market ground lease intangibles which is included (net increase) in property and maintenance expense in the accompanying consolidated statements of operations and comprehensive income and approximately $2.7 million of above and below market retail lease intangibles which is included (net increase) in rental income in the accompanying consolidated statements of operations and comprehensive income.
	The weighted average amortization period for above and below market ground lease intangibles and retail lease intangibles is 49.8 years and 2.8 years, respectively.
	The following table provides a summary of the aggregate amortization expense for above and below market ground lease intangibles and retail lease intangibles for each of the next five years (amounts in thousands):
			2014				2015				2016			2017			2018
	Ground lease intangibles		$	4,321			$	4,321			$	4,321		$	4,321		$	4,321
	Retail lease intangibles		(1,010		)		(1,016		)		(908		)	(540		)	(71		)
	Total		$	3,311			$	3,305			$	3,413		$	3,781		$	4,250
	Archstone Acquisition
	On February 27, 2013, the Company, AvalonBay Communities, Inc. (“AVB”) and certain of their respective subsidiaries completed their previously announced acquisition (the “Archstone Acquisition” or the "Archstone Transaction") from Archstone Enterprise LP (“Enterprise”) (which subsequently changed its name to Jupiter Enterprise LP), an affiliate of Lehman Brothers Holdings, Inc. (“Lehman”) and its affiliates, of all of the assets of Enterprise (including interests in various entities affiliated with Enterprise), constituting a portfolio of apartment properties and other assets (the “Archstone Portfolio”).
	The Company acquired assets representing approximately 60% of the Archstone Portfolio which consisted principally of high-quality apartment properties in major markets in the United States. The acquisition allowed the Company to accelerate the completion of its strategic shift into coastal apartment markets. Pursuant to the Archstone Transaction, the Company acquired directly or indirectly, 71 wholly owned, stabilized properties consisting of 20,160 apartment units, one partially owned and consolidated stabilized property consisting of 432 apartment units, one partially owned and unconsolidated stabilized property consisting of 336 apartment units, three consolidated master-leased properties consisting of 853 apartment units, four projects in various stages of construction (two consolidated and two unconsolidated) for 964 apartment units and fourteen land sites for approximately $9.0 billion. During the year ended December 31, 2013, the Company recorded revenues and net operating income ("NOI") of $514.7 million and $352.8 million, respectively, from the acquired assets.
	The consideration paid by the Company in connection with the Archstone Acquisition consisted of cash of approximately $4.0 billion (inclusive of $2.0 billion of Archstone secured mortgage principal paid off in conjunction with the closing), 34,468,085 Common Shares (which shares had a total value of $1.9 billion based on the February 27, 2013 closing price of EQR common shares of $55.99 per share) issued to the seller and the assumption of approximately $3.1 billion of mortgage debt (inclusive of a net mark-to-market premium of $127.9 million) and approximately 60% of all of the other assets and liabilities related to the Archstone Portfolio. The cash consideration was funded with proceeds from the November 2012 public equity offering, the asset sales discussed below, the Company's new $750.0 million senior unsecured delayed draw term loan facility and the Company's revolving credit facility.
	The Company owns the building and improvements and leases the land underlying the improvements under long-term ground leases that expire beginning in 2042 and running through 2103 for nine of the operating properties acquired and discussed above. These properties are consolidated and reflected as real estate assets while the ground leases are accounted for as operating leases. The Company also leases the three master-leased properties discussed above to third party operators and earns monthly net rental income.
	The Company is accounting for the acquisition under the acquisition method in accordance with Accounting Standards Codification ("ASC") 805, Business Combinations (“ASC 805”), and the initial accounting for this business combination is substantially complete but subject to further adjustment as certain information becomes available (see further discussion below). The following table summarizes the acquisition date fair values of the assets acquired and liabilities assumed, which the Company determined using Level 1, Level 2 and Level 3 inputs (amounts in thousands):
	Land		$	2,239,000
	Depreciable property:
	Buildings and improvements		5,805,467
	Furniture, fixtures and equipment		61,470
	In-Place lease intangibles		304,830
	Projects under development		36,583
	Land held for development		244,097
	Investments in unconsolidated entities		196,615
	Other assets		195,260
	Other liabilities		(112,107		)
	Net assets acquired		$	8,971,215
	The allocation of fair values of the assets acquired and liabilities assumed has changed from the allocation reported in “Note 4 – Real Estate and Lease Intangibles” in the Notes to Consolidated Financial Statements included in Part I of our Quarterly Report on Form 10-Q for the quarter ended September 30, 2013 filed with the SEC on November 7, 2013. The changes to our valuation assumptions were based on more accurate information concerning the subject assets and liabilities. None of these changes had a material impact on our Consolidated Financial Statements. This allocation is subject to further adjustment due primarily to information not readily available at the acquisition date, final purchase price settlement with our partner in accordance with the terms of the purchase agreement, reclassification adjustments for presentation and adjustments to our valuation assumptions. The Company's assessment of the fair values and the allocation of the purchase price to the identified tangible and intangible assets/liabilities is its current best estimate of fair value.
	The fair values of investment in real estate were determined using internally developed models that were based on market assumptions and comparable sales data as well as external valuations performed by unrelated third parties. The market assumptions used as inputs to the Company’s fair value model include construction costs, leasing assumptions, growth rates, discount rates, terminal capitalization rates and development yields. The Company uses data on its existing portfolio of properties and its recent acquisition and development properties, as well as similar market data from third party sources, when available, in determining these inputs (Level 2 and 3). The fair value of Noncontrolling Interests was calculated similar to the investment in real estate described above. The fair value of mortgage debt was calculated using indicative rates, leverage and coverage provided by lenders of similar loans (Level 2). The Common Shares issued to an affiliate of Lehman Brothers Holdings, Inc. were valued using the quoted market price of Common Shares (Level 1).
	The following table summarizes the acquisition date fair values of the above and below market ground and retail lease intangibles, which we determined using Level 2 and Level 3 inputs (amounts in thousands):
	Description		Balance Sheet Location		Fair Value
	Ground lease intangibles – below market		Other Assets		$	178,251
	Retail lease intangibles – above market		Other Assets		1,260
	Ground lease intangibles – above market		Other Liabilities		2,400
	Retail lease intangibles – below market		Other Liabilities		8,040
As of December 31, 2013, the Company has incurred Archstone-related expenses of approximately $94.7 million, of which approximately $13.5 million of this total was financing-related and approximately $81.2 million was merger costs. During the years ended December 31, 2013, 2012 and 2011, the Company expensed $19.9 million, $5.6 million and $1.7 million, respectively, of direct merger costs primarily related to investment banking and legal/accounting fees, which were included in merger expenses in the accompanying consolidated statements of operations and comprehensive income. During the year ended December 31, 2013, the Company also expensed $54.0 million of indirect merger costs related to severance obligations and retention bonuses through our 60% interest in an unconsolidated joint venture with AVB, which were included in (loss) from investments in unconsolidated entities due to merger expenses in the accompanying consolidated statements of operations and comprehensive income. In addition, during the years ended December 31, 2013, 2012 and 2011, the Company expensed $2.5 million, $8.4 million and $2.6 million, respectively, of financing-related costs, which were included in interest expense in the accompanying consolidated statements of operations and comprehensive income.
Unaudited Pro Forma Financial Information
Equity Residential
The following table illustrates the effect on net income, earnings per share – basic and earnings per share – diluted as if the Company had consummated the Archstone Acquisition as of January 1, 2012:
		Year Ended December 31,
		2013				2012
		(Amounts in thousands, except per share amounts)
Total revenues		$	2,485,438			$	2,317,699
Income (loss) from continuing operations (1)		203,286				(54,940		)
Discontinued operations, net		2,074,072				720,361
Net income		2,277,358				665,421
Net income available to Common Shares		2,183,756				622,424
Earnings per share - basic:
Net income available to Common Shares		$	6.07			$	1.74
Weighted average Common Shares outstanding (2)		359,688				356,984
Earnings per share - diluted (1):
Net income available to Common Shares		$	6.05			$	1.74
Weighted average Common Shares outstanding (2)		375,861				356,984
-1	Potential common shares issuable from the assumed conversion of OP Units and the exercise/vesting of long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per share calculation as the Company had a pro forma loss from continuing operations for the year ended December 31, 2012.
-2	Includes an adjustment for Common Shares issued to the public in December 2012 and to an affiliate of Lehman Brothers Holdings Inc. in February 2013 as partial consideration for the Archstone Acquisition.
ERP Operating Limited Partnership
The following table illustrates the effect on net income, earnings per Unit – basic and earnings per Unit – diluted as if the Operating Partnership had consummated the Archstone Acquisition as of January 1, 2012:
		Year Ended December 31,
		2013				2012
		(Amounts in thousands, except per Unit amounts)
Total revenues		$	2,485,438			$	2,317,699
Income (loss) from continuing operations (1)		203,286				(54,940		)
Discontinued operations, net		2,074,072				720,361
Net income		2,277,358				665,421
Net income available to Units		2,273,798				651,548
Earnings per Unit - basic:
Net income available to Units		$	6.07			$	1.74
Weighted average Units outstanding (2)		373,421				370,837
Earnings per Unit - diluted (1):
Net income available to Units		$	6.05			$	1.74
Weighted average Units outstanding (2)		375,861				370,837
-1	Potential Units issuable from the assumed exercise/vesting of the Company's long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per Unit calculation as the Operating Partnership had a pro forma loss from continuing operations for the year ended December 31, 2012.
-2	Includes an adjustment for Common Shares issued to the public in December 2012 and to an affiliate of Lehman Brothers Holdings Inc. in February 2013 as partial consideration for the Archstone Acquisition. Concurrent with these transactions, ERPOP issued the same number of OP Units to EQR.
For the years ended December 31, 2013 and 2012, acquisition costs of $19.9 million and $5.6 million, respectively, and severance/retention and other costs of $54.1 million and none, respectively, related to the Archstone Acquisition are not expected to have a continuing impact on the Company's financial results and therefore have been excluded from these pro forma results. The pro forma results also do not include the impact of any synergies or lower borrowing costs that the Company has or may achieve as a result of the acquisition or any strategies that management has or may consider in order to more efficiently manage the Company's operations, nor do they give pro forma effect to any other acquisitions, dispositions or capital markets transactions (excluding the equity offering in December 2012 which proceeds were used for the Archstone Acquisition) that the Company completed during the periods presented. These pro forma results are not necessarily indicative of the operating results that would have been obtained had the Archstone Acquisition occurred at the beginning of the periods presented, nor are they necessarily indicative of future operating results.
Other
In addition to the Archstone Acquisition described above, during the year ended December 31, 2013, the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands):
		Properties			Apartment Units			Purchase Price
Rental Properties – Consolidated		1			322			$	91,500
Land Parcel (one)		—			—			16,500
Total		1			322			$	108,000
During the year ended December 31, 2012, the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands):
		Properties			Apartment Units			Purchase Price
Rental Properties – Consolidated		9			1,896			$	906,305
Land Parcel (six)		—			—			141,240
Total		9			1,896			$	1,047,545
During the year ended December 31, 2013, the Company disposed of the following to unaffiliated parties (sales price in thousands):
		Properties			Apartment Units			Sales Price
Consolidated:
Rental Properties		94			29,180			$	4,459,339
Land Parcels (seven)		—			—			99,650
Other (1)		—			—			30,734
Unconsolidated:
Land Parcel (one) (2)		—			—			26,350
Total		94			29,180			$	4,616,073
(1) Represents a 97,000 square foot commercial building adjacent to our Harbor Steps apartment property in downtown Seattle that was acquired in 2011.
(2) Sales price listed is the gross sales price. EQR's share of the net sales proceeds approximated 25%.
The Company recognized a net gain on sales of discontinued operations of approximately $2.0 billion and a net gain on sales of land parcels of approximately $12.2 million on the above sales.
During the year ended December 31, 2012, the Company disposed of the following to unaffiliated parties (sales price in thousands):
		Properties			Apartment Units			Sales Price
Rental Properties – Consolidated		35			9,012			$	1,061,334
Total		35			9,012			$	1,061,334
The Company recognized a net gain on sales of discontinued operations of approximately $548.3 million on the above sales.

Commitments_to_AcquireDispose_

Commitments to Acquire/Dispose of Real Estate	12 Months Ended
	Dec. 31, 2013
Commitments to Acquire Dispose of Real Estate [Abstract]	'
Commitments To Acquire Dispose Of Real Estate Text Block	'
	5	Commitments to Acquire/Dispose of Real Estate
	In addition to the property that was subsequently acquired as discussed in Note 18, the Company has entered into a separate agreement to acquire the following (purchase price in thousands):
		Properties	Apartment Units	Purchase Price
	Land Parcel (one)	—	—	$	10,290
	Total	—	—	$	10,290
	The Company has entered into a separate agreement to dispose of the following (sales price in thousands):
		Properties	Apartment Units	Purchase Price
	Land Parcel (one)	—	—	$	40,300
	Total	—	—	$	40,300
	The closings of these pending transactions are subject to certain conditions and restrictions, therefore, there can be no assurance that these transactions will be consummated or that the final terms will not differ in material respects from those summarized in the preceding paragraphs.

Investments_in_Partially_Owned

Investments in Partially Owned Entities	12 Months Ended
	Dec. 31, 2013
Investments in Partially Owned Entities [Abstract]	'
Investments in Partially Owned Entities	'
	6	Investments in Partially Owned Entities
	The Company has co-invested in various properties with unrelated third parties which are either consolidated or accounted for under the equity method of accounting (unconsolidated). The following tables and information summarize the Company’s investments in partially owned entities as of December 31, 2013 (amounts in thousands except for project and apartment unit amounts):
		Consolidated									Unconsolidated
		Development Projects									Development Projects
		Held for			Operating			Total			Held for			Completed, Not Stabilized (3)			Operating			Total
		and/or Under									and/or Under
		Development									Development
	Total projects (1)	—			19			19			—			3			1			4
	Total apartment units (1)	—			3,752			3,752			—			1,333			336			1,669
	Balance sheet information at 12/31/13 (at 100%):
	ASSETS
	Investment in real estate	$	342,222		$	673,957		$	1,016,179		$	45,123		$	284,264		$	55,545		$	384,932
	Accumulated depreciation	—			(172,802		)	(172,802		)	—			(1,887		)	(4,605		)	(6,492		)
	Investment in real estate, net	342,222			501,155			843,377			45,123			282,377			50,940			378,440
	Cash and cash equivalents	4,704			22,792			27,496			262			1,505			1,377			3,144
	Investments in unconsolidated entities	—			54,439			54,439			—			—			—			—
	Deposits – restricted	43,654			220			43,874			—			95			47			142
	Deferred financing costs, net	—			2,496			2,496			77			129			4			210
	Other assets	5,841			26,899			32,740			—			355			871			1,226
	Total assets	$	396,421		$	608,001		$	1,004,422		$	45,462		$	284,461		$	53,239		$	383,162
	LIABILITIES AND EQUITY/CAPITAL
	Mortgage notes payable (2)	$	—		$	360,130		$	360,130		$	11,379		$	172,279		$	30,550		$	214,208
	Accounts payable & accrued expenses	21,569			1,113			22,682			4,433			3,844			164			8,441
	Accrued interest payable	—			1,283			1,283			23			693			—			716
	Other liabilities	1,157			1,487			2,644			339			572			768			1,679
	Security deposits	10			1,828			1,838			—			222			105			327
	Total liabilities	22,736			365,841			388,577			16,174			177,610			31,587			225,371
	Noncontrolling Interests – Partially Owned	114,245			12,338			126,583			27,858			73,902			20,450			122,210
	Properties/Partners' equity
	Company equity/General and Limited	259,440			229,822			489,262			1,430			32,949			1,202			35,581
	Partners' Capital
	Total equity/capital	373,685			242,160			615,845			29,288			106,851			21,652			157,791
	Total liabilities and equity/capital	$	396,421		$	608,001		$	1,004,422		$	45,462		$	284,461		$	53,239		$	383,162
		Consolidated									Unconsolidated
		Development Projects									Development Projects
		Held for									Held for						Operating
		and/or Under									and/or Under			Completed, Not Stabilized (3)
		Development			Operating			Total			Development									Total
	Operating information for the year ended 12/31/13 (at 100%):
	Operating revenue	$	231		$	80,968		$	81,199		$	—		$	6,629		$	4,597		$	11,226
	Operating expenses	741			24,888			25,629			135			3,554			1,949			5,638
	Net operating (loss) income	(510		)	56,080			55,570			(135		)	3,075			2,648			5,588
	Depreciation	—			31,824			31,824			—			1,887			4,605			6,492
	General and administrative/other	882			93			975			—			53			201			254
	Operating (loss) income	(1,392		)	24,163			22,771			(135		)	1,135			(2,158		)	(1,158		)
	Interest and other income	2			3			5			—			—			10			10
	Other expenses	(503		)	(5		)	(508		)	—			—			—			—
	Interest:
	Expense incurred, net	(2		)	(14,561		)	(14,563		)	—			(1,886		)	(941		)	(2,827		)
	Amortization of deferred financing costs	—			(301		)	(301		)	—			—			(1		)	(1		)
	(Loss) income before income and other taxes, (loss)	(1,895		)	9,299			7,404			(135		)	(751		)	(3,090		)	(3,976		)
	from investments in unconsolidated entities, net
	(loss) gain on sales of land parcels and
	discontinued operations
	Income and other tax (expense) benefit	(11		)	(56		)	(67		)	—			—			—			—
	(Loss) from investments in unconsolidated entities	—			(1,387		)	(1,387		)	—			—			—			—
	Net (loss) on sales of land parcels	(17		)	—			(17		)	—			—			—			—
	Net gain on sales of discontinued operations	—			26,673			26,673			—			—			—			—
	Net (loss) income	$	(1,923	)	$	34,529		$	32,606		$	(135	)	$	(751	)	$	(3,090	)	$	(3,976	)
	-1	Project and apartment unit counts exclude all uncompleted development projects until those projects are substantially completed.
	-2	All debt is non-recourse to the Company with the exception of 50% of the current $11.4 million outstanding debt balance on one unconsolidated development project.
	-3	Projects included here are substantially complete. However, they may still require additional exterior and interior work for all units to be available for leasing.
	Note:	The above tables exclude the Company's interests in unconsolidated joint ventures entered into with AVB in connection with the Archstone Transaction. These ventures own certain non-core Archstone assets that are held for sale and succeeded to certain residual Archstone liabilities, such as liability for various employment-related matters as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries. The preferred interests have an aggregate liquidation value of $89.0 million at December 31, 2013. The ventures are owned 60% by the Company and 40% by AVB.
During the year ended December 31, 2012, the Company and its joint venture partner sold two consolidated partially owned properties consisting of 441 apartment units and recognized a net gain on the sales of approximately $21.3 million.
The Company is the controlling partner in various consolidated partnership properties and development properties having a noncontrolling interest book value of $126.6 million at December 31, 2013. The Company has identified one development partnership, consisting of a land parcel with a book value of $5.0 million, as a VIE. The Company does not have any unconsolidated VIEs.
Archstone Acquisition
On February 27, 2013, in conjunction with the Archstone Acquisition, the Company acquired interests in several joint ventures. Details of these interests follow by project:
Park Aire (formerly known as Enclave at Wellington) – This venture is currently developing certain land parcels into a 268 unit apartment building located in Wellington, Florida. The Company has a 95% equity interest with an initial basis of $26.2 million. Total project costs are expected to be approximately $50.0 million. The Company is the managing member, is responsible for constructing the project and its partner does not have substantive kick-out or participating rights. As a result, the entity is required to be consolidated on the Company's balance sheet.
East Palmetto Park – This venture was formed to ultimately develop certain land parcels into a 377 unit apartment building located in Boca Raton, Florida. The Company has a 90% equity interest with an initial basis of $20.2 million. The Company is the managing member, is responsible for constructing the project and its partner does not have substantive kick-out or participating rights. As a result, the entity is required to be consolidated on the Company's balance sheet.
Wisconsin Place – This project contains a mixed-use site located in Chevy Chase, Maryland consisting of residential, retail, office and accessory uses, including underground parking facilities. The Company has a 75% equity interest with an initial basis of $198.5 million in the 432 unit residential component. The Company is the managing member, was responsible for constructing the residential project and its partner does not have substantive kick-out or participating rights. As a result, the entity that owns the residential component of this mixed-use site is required to be consolidated on the Company's balance sheet. Such entity also retains an unconsolidated interest in an entity that owns the land underlying the entire project and owns and operates the parking facility. The initial fair value of this investment is $56.5 million. The Company does not have any ownership interest in the retail and office components.
San Norterra – This venture developed certain land parcels into a 388 unit apartment building located in Phoenix, Arizona. The Company has an 85% equity interest with an initial basis of $16.9 million. Total project costs are approximately $56.3 million and construction was partially funded with a construction loan that is guaranteed by the partner and non-recourse to the Company. The loan has a maximum debt commitment of $34.8 million and a current unconsolidated outstanding balance of $33.0 million; the loan bears interest at LIBOR plus 2.00% and matures January 6, 2015. The partner is the managing member and developed the project. The Company does not have substantive kick-out or participating rights. As a result, the entity is unconsolidated and recorded using the equity method of accounting.
Waterton Tenside – This venture was formed to develop and operate a 336 unit apartment property located in Atlanta, Georgia. The Company has a 20% equity interest with an initial basis of $5.1 million. The partner is the managing member and developed the project. The project is encumbered by a non-recourse mortgage loan that has a current outstanding balance of $30.6 million, bears interest at 3.66% and matures December 1, 2018. The Company does not have substantive kick-out or participating rights. As a result, the entity is unconsolidated and recorded using the equity method of accounting.
Parkside at Emeryville – This venture is currently developing certain land parcels into a 176 unit apartment building located in Emeryville, California. The Company has a 5% equity interest with an initial obligation of approximately $2.1 million. Total project costs are expected to be approximately $75.0 million and construction is being partially funded with a construction loan. The loan has a maximum debt commitment of $39.5 million and a current unconsolidated outstanding balance of $11.4 million; the loan bears interest at LIBOR plus 2.25% and matures August 14, 2015. The Company has given a repayment guaranty on the construction loan of 50% of the outstanding balance, up to a maximum of $19.7 million, and has given certain construction cost overrun guarantees. The partner is the managing member and is developing the project. The Company does not have substantive kick-out or participating rights. As a result, the entity is unconsolidated and recorded using the equity method of accounting.
On February 27, 2013, in connection with the Archstone Acquisition, subsidiaries of the Company and AVB entered into three limited liability company agreements (collectively, the “Residual JV”). The Residual JV owns certain non-core Archstone assets that are held for sale, such as interests in a German portfolio of apartment buildings, and succeeded to certain residual Archstone liabilities, such as liability for various employment-related matters. The Residual JV is owned 60% by the Company and 40% by AVB and the Company's initial investment was $113.6 million. The Residual JV is managed by a Management Committee consisting of two members from each of the Company and AVB. Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners. As a result, the Residual JV is unconsolidated and recorded using the equity method of accounting.
On February 27, 2013, in connection with the Archstone Acquisition, a subsidiary of the Company and AVB entered into a limited liability company agreement (the “Legacy JV”), through which they assumed obligations of Archstone in the form of preferred interests, some of which are governed by tax protection arrangements. During the year ended December 31, 2013, the Company purchased with AVB $65.0 million (of which the Company's 60% share was $39.0 million) of the preferred interests assumed by Legacy JV. At December 31, 2013, the remaining preferred interests have an aggregate liquidation value of $89.0 million, our share of which is included in other liabilities in the accompanying consolidated balance sheets. Obligations of the Legacy JV are borne 60% by the Company and 40% by AVB. The Legacy JV is managed by a Management Committee consisting of two members from each of the Company and AVB. Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners. As a result, the Legacy JV is unconsolidated and recorded using the equity method of accounting.
Other
In December 2011, the Company and Toll Brothers (NYSE: TOL) jointly acquired a vacant land parcel at 400 Park Avenue South in New York City. The Company's and Toll Brothers' allocated portions of the purchase price were approximately $76.1 million and $57.9 million, respectively. The Company is the managing member and Toll Brothers does not have substantive kick-out or participating rights. Until the core and shell of the building is complete, the building and land will be owned jointly and are required to be consolidated on the Company's balance sheet. Thereafter, the Company will solely own and control the rental portion of the building (floors 2-22) and Toll Brothers will solely own and control the for sale portion of the building (floors 23-40). Once the core and shell are complete, the Toll Brothers' portion of the property will be deconsolidated from the Company's balance sheet. The acquisition was financed through contributions by the Company and Toll Brothers of approximately $102.5 million and $75.7 million, respectively, which included the land purchase noted above, restricted deposits and taxes and fees. As of December 31, 2013, the Company's and Toll Brothers' consolidated contributions to the joint venture were approximately $292.6 million, of which Toll Brothers' noncontrolling interest balance totaled $111.7 million.
The Company admitted an 80% institutional partner to two separate entities/transactions (Nexus Sawgrass in December 2010 and Domain in August 2011), each owning a developable land parcel, in exchange for $40.1 million in cash and retained a 20% equity interest in both of these entities. These projects are now unconsolidated. Details of these projects follow:
•	Nexus Sawgrass – This development project was substantially completed as of September 30, 2013. Total project costs are expected to be approximately $80.0 million and construction was predominantly funded with a long-term, non-recourse secured loan from the partner. The mortgage loan has a maximum debt commitment of $48.7 million and a current unconsolidated outstanding balance of $47.6 million; the loan bears interest at 5.60% and matures January 1, 2021.
•	Domain – This development project was substantially completed as of December 31, 2013. Total project costs are expected to be approximately $154.6 million and construction was predominantly funded with a long-term, non-recourse secured loan from the partner. The mortgage loan has a maximum debt commitment of $98.6 million and a current unconsolidated outstanding balance of $91.6 million; the loan bears interest at 5.75% and matures January 1, 2022.
While the Company is the managing member of both of the joint ventures, was responsible for constructing both of the projects and has given certain construction cost overrun guarantees, the joint venture partner has significant participating rights and has active involvement in and oversight of the ongoing projects. The Company currently has no further funding obligations related to these projects.

Deposits_Restricted

Deposits - Restricted	12 Months Ended
	Dec. 31, 2013
Deposits - Restricted [Abstract]	'
Restricted Cash And Cash Equivalents Disclosure [Text Block]	'
	7	Deposits – Restricted
	The following table presents the Company’s restricted deposits as of December 31, 2013 and 2012 (amounts in thousands):
			December 31, 2013		December 31, 2012
	Tax – deferred (1031) exchange proceeds		$	—	$	152,182
	Earnest money on pending acquisitions		4,514		5,613
	Restricted deposits on real estate investments		53,771		44,209
	Resident security and utility deposits		44,777		44,199
	Other		505		4,239
	Totals		$	103,567	$	250,442

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt Disclosure [Text Block]	'
	8	Debt
	EQR does not have any indebtedness as all debt is incurred by the Operating Partnership. EQR guarantees the Operating Partnership’s $750.0 million senior unsecured delayed draw term loan facility and also guarantees the Operating Partnership’s revolving credit facility up to the maximum amount and for the full term of the facility.
	Mortgage Notes Payable
	As of December 31, 2013, the Company had outstanding mortgage debt of approximately $5.2 billion.
	During the year ended December 31, 2013, the Company:
	▪	Assumed as part of the Archstone Transaction $2.2 billion of mortgage debt held in two Fannie Mae loan pools, consisting of $1.2 billion collateralized by 16 properties with an interest rate of 6.256% and a maturity date of November 1, 2017 ("Pool 3") and $963.5 million collateralized by 15 properties with an interest rate of 5.883% and a maturity date of November 1, 2014 ("Pool 4");
	▪	Repaid $2.5 billion of mortgage loans, which includes the partial paydown of $825.0 million of Pool 3 mortgage debt and the payoff of $963.5 million of Pool 4 mortgage debt;
	▪	Assumed as part of the Archstone Transaction $346.6 million of tax-exempt bonds on four properties with interest rates ranging from SIFMA plus 0.860% to SIFMA plus 1.402% and maturity dates through November 15, 2036;
	▪	Assumed as part of the Archstone Transaction $339.0 million of other mortgage debt on three properties with fixed interest rates ranging from 0.100% to 5.240% and maturity dates through May 1, 2061;
	▪	Assumed as part of the Archstone Transaction $34.1 million of other mortgage debt on one property with a variable rate of LIBOR plus 1.75% and a maturity date of September 1, 2014;
	▪	Recorded $127.9 million of net mark-to-market premiums on the mortgage debt described in the bullets above; and
	▪	Obtained $902.9 million of new mortgage loan proceeds, inclusive of an $800.0 million secured loan from a large insurance company which matures on November 10, 2023, is interest only and carries a fixed interest rate of 4.21%.
	The Company recorded approximately $222.4 million and $7.4 million of prepayment penalties and write-offs of unamortized deferred financing costs, respectively, during the year ended December 31, 2013 as additional interest expense related to debt extinguishment of mortgages. The Company also recorded $110.5 million of write-offs of net unamortized premiums during the year ended December 31, 2013 as a reduction of interest expense related to debt extinguishment of mortgages.
	As of December 31, 2013, the Company had $700.5 million of secured debt subject to third party credit enhancement.
	As of December 31, 2013, scheduled maturities for the Company’s outstanding mortgage indebtedness were at various dates through May 1, 2061. At December 31, 2013, the interest rate range on the Company’s mortgage debt was 0.03% to 7.25%. During the year ended December 31, 2013, the weighted average interest rate on the Company’s mortgage debt was 4.23% (excludes $113.6 million of write-offs of unamortized premiums related to debt extinguishment of mortgages).
	The historical cost, net of accumulated depreciation, of encumbered properties was $7.3 billion and $4.4 billion at December 31, 2013 and 2012, respectively.
	As of December 31, 2012, the Company had outstanding mortgage debt of approximately $3.9 billion.
	During the year ended December 31, 2012, the Company:
	▪	Repaid $364.3 million of mortgage loans;
	▪	Obtained $26.5 million of new mortgage loan proceeds; and
	▪	Assumed $137.6 million of mortgage debt on two acquired properties.
	The Company recorded approximately $0.3 million and $1.6 million of prepayment penalties and write-offs of unamortized deferred financing costs, respectively, during the year ended December 31, 2012 as additional interest expense related to debt extinguishment of mortgages.
	As of December 31, 2012, the Company had $362.2 million of secured debt subject to third party credit enhancement.
	As of December 31, 2012, scheduled maturities for the Company’s outstanding mortgage indebtedness were at various dates through June 15, 2051. At December 31, 2012, the interest rate range on the Company’s mortgage debt was 0.11% to 11.25%. During the year ended December 31, 2012, the weighted average interest rate on the Company’s mortgage debt was 4.96%.
	Notes
	The following tables summarize the Company’s unsecured note balances and certain interest rate and maturity date information as of and for the years ended December 31, 2013 and 2012, respectively:
	31-Dec-13		Net Principal Balance				Interest Rate Ranges	Weighted Average Interest Rate	Maturity Date Ranges
	(Amounts are in thousands)
	Fixed Rate Public/Private Notes (1)		$	4,727,088			3.00% - 7.57%	5.55%	2014 - 2026
	Floating Rate Public/Private Notes (1)		750,000				(1) (2)	1.58%	2015
	Totals		$	5,477,088
	31-Dec-12		Net Principal Balance				Interest Rate Ranges	Weighted Average Interest Rate	Maturity Date Ranges
	(Amounts are in thousands)
	Fixed Rate Public/Private Notes (1)		$	4,329,352			4.625% - 7.57%	5.70%	2013 - 2026
	Floating Rate Public/Private Notes (1)		301,523				-1	1.83%	2013
	Totals		$	4,630,875
	-1	At December 31, 2012, $300.0 million in fair value interest rate swaps converts a portion of the $400.0 million face value 5.200% notes due April 1, 2013 to a floating interest rate. On April 1, 2013, the Company paid off the $400.0 million outstanding of its 5.200%  public notes at maturity and the related fair value interest rate swaps matured.
	-2	Includes the Company's senior unsecured $750.0 million delayed draw term loan facility that matures on January 11, 2015 and is subject to a one-year extension option exercisable by the Company. The interest rate on advances under the term loan facility will generally be LIBOR plus a spread (currently 1.20%), which is dependent on the credit rating of the Company's long-term debt.
	The Company’s unsecured public debt contains 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 both the years ended December 31, 2013 and 2012.
	An unspecified amount of equity and debt securities remains available for issuance by EQR and ERPOP under a universal shelf registration statement that automatically became effective upon filing with the SEC on July 30, 2013 and expires on July 30, 2016. 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).
	During the year ended December 31, 2013, the Company:
	▪	Repaid $400.0 million of 5.200% unsecured notes at maturity;
	▪	Issued $500.0 million of ten-year 3.00% fixed rate public notes, receiving net proceeds of $495.6 million before underwriting fees, hedge termination costs and other expenses, at an all-in effective interest rate of 3.998%; and
	▪	Entered into a senior unsecured $750.0 million delayed draw term loan facility which was fully drawn on February 27, 2013 in connection with the Archstone Acquisition. The maturity date of January 11, 2015 is subject to a one-year extension option exercisable by the Company. The interest rate on advances under the term loan facility will generally be LIBOR plus a spread (currently 1.20%), which is dependent on the credit rating of the Company's long-term debt.
	During the year ended December 31, 2012, the Company:
	▪	Repaid $253.9 million of 6.625% unsecured notes at maturity;
	▪	Repaid $222.1 million of 5.500% unsecured notes at maturity;
	▪	Repaid its $500.0 million term loan facility at maturity; and
	▪	Entered into a new senior unsecured $500.0 million delayed draw term loan facility that could have been drawn anytime on or before July 4, 2012. The Company elected not to draw on this facility and subject to the terms of the agreement, the facility expired undrawn. The Company recorded approximately $1.0 million of write-offs of unamortized deferred financing costs at termination.
	In November 2012, the Company obtained a commitment for a senior unsecured bridge loan facility in an aggregate principal amount not to exceed $2.5 billion to finance the acquisition of Archstone and to pay fees and expenses relating to this transaction. The Company incurred fees totaling $10.9 million to structure this facility, of which $8.4 million was written off in 2012 in conjunction with additional capital raising activities which curtailed amounts available on this facility. On January 11, 2013, the Company terminated this $2.5 billion bridge loan facility in connection with the execution of the term loan facility discussed above and the new revolving credit facility discussed below. The Company wrote off approximately $2.5 million of unamortized deferred financing costs during the year ended December 31, 2013 as additional interest expense.
	In December 2011, the Company obtained a commitment for a senior unsecured bridge loan facility in an aggregate principal amount not to exceed $1.0 billion to finance the potential acquisition of an ownership interest in Archstone. The Company paid fees of $2.6 million to structure this facility, which were recorded as deferred financing costs and amortized in 2011. On January 6, 2012, the Company terminated this $1.0 billion bridge loan facility in connection with an amendment to the Company's revolving credit facility (see below for further discussion) and the execution of the $500.0 million delayed draw term loan facility discussed above.
	On October 11, 2007, the Company closed on a $500.0 million senior unsecured term loan. Effective April 5, 2011, the Company exercised the second of its two one-year extension options, resulting in a maturity date of October 5, 2012. The Company paid off this term loan at maturity. The loan bore interest at variable rates based upon LIBOR plus a spread (0.50%) dependent upon the credit rating on the Company’s long-term senior unsecured debt.
	On August 23, 2006, the Company issued $650.0 million of exchangeable notes that were to mature on August 15, 2026. The notes bore interest at a fixed rate of 3.85%. The notes were exchangeable into Common Shares, at the option of the holders, under specific circumstances or on or after August 15, 2025, at an exchange rate of 16.3934 shares per $1,000 principal amount of notes (equivalent to an exchange price of $61.00 per share). On August 18, 2011 (the "Redemption Date"), the Operating Partnership redeemed all of the outstanding notes for $482.5 million in cash, which was equal to 100% of the principal amount of such notes, plus accrued and unpaid interest up to but excluding the Redemption Date. See Note 2 for more information on the change in the recognition of interest expense for these notes.
	Lines of Credit
	On January 11, 2013, the Company replaced its existing $1.75 billion facility with a $2.5 billion unsecured revolving credit facility maturing April 1, 2018. The Company has the ability to increase available borrowings by an additional $500.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments. The interest rate on advances under the new credit facility will generally be LIBOR plus a spread (currently 1.05%) and the Company pays an annual facility fee (currently 15 basis points). Both the spread and the facility fee are dependent on the credit rating of the Company's long-term debt.
	In July 2011, the Company replaced its then existing unsecured revolving credit facility with a new $1.25 billion unsecured revolving credit facility maturing on July 13, 2014, subject to a one-year extension option exercisable by the Company. The Company had the ability to increase available borrowings by an additional $500.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments. On January 6, 2012, the Company amended this credit facility to increase available borrowings by an additional $500.0 million to $1.75 billion with all other terms, including the July 13, 2014 maturity date, remaining the same. The interest rate on advances under the credit facility was generally LIBOR plus a spread (1.15%) and the Company paid an annual facility fee of 0.2%. Both the spread and the facility fee were dependent on the credit rating of the Company's long-term debt. The facility had replaced the Company's previous $1.425 billion facility which was scheduled to mature in February 2012. The Company wrote-off $0.2 million in unamortized deferred financing costs related to the old facility.
	As of December 31, 2013, the amount available on the credit facility was $2.35 billion (net of $34.9 million which was restricted/dedicated to support letters of credit and net of $115.0 million outstanding). During the year ended December 31, 2013, the weighted average interest rate was 1.26%. As of December 31, 2012, the amount available on the credit facility was $1.72 billion (net of $30.2 million which was restricted/dedicated to support letters of credit) and there was no amount outstanding. During the year ended December 31, 2012, the weighted average interest rate was 1.35%.
	Other
	The following table provides a summary of the aggregate payments of principal on all debt for each of the next five years and thereafter (amounts in thousands):
	Year			Total (1)
	2014			$	561,084
	2015			1,170,448
	2016			1,193,251
2017			1,347,191
2018	—		297,016
Thereafter			6,209,697
Net Unamortized (Discount)			(12,433		)
Total			$	10,766,254
-1	Premiums and discounts are amortized over the life of the debt.

Derivative_and_Other_Fair_Valu

Derivative and Other Fair Value Instruments	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Derivatives and Fair Value [Text Block]	'
	9	Derivative and Other Fair Value Instruments
	The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments. The Company, where possible, bases the fair values of its financial instruments, including its derivative instruments, on listed market prices and third party quotes. Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments.
	The carrying values of the Company’s mortgage notes payable and unsecured debt (including its line of credit) were approximately $5.2 billion and $5.6 billion, respectively, at December 31, 2013. The fair values of the Company’s mortgage notes payable and unsecured debt (including its line of credit) were approximately $5.1 billion (Level 2) and $5.9 billion (Level 2), respectively, at December 31, 2013. The carrying values of the Company’s mortgage notes payable and unsecured notes were approximately $3.9 billion and $4.6 billion, respectively, at December 31, 2012. The fair values of the Company’s mortgage notes payable and unsecured notes were approximately $4.3 billion (Level 2) and $5.2 billion (Level 2), respectively, at December 31, 2012. The fair values of the Company’s financial instruments (other than mortgage notes payable, unsecured notes, lines of credit, derivative instruments and investment securities), including cash and cash equivalents and other financial instruments, approximate their carrying or contract values.
	In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company seeks to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments. The Company may also use derivatives to manage its exposure to foreign exchange rates or manage commodity prices in the daily operations of the business.
	The following table summarizes the Company’s consolidated derivative instruments at December 31, 2013 (dollar amounts are in thousands):
		Forward
		Starting
		Swaps (1)
	Current Notional Balance	$	400,000
	Lowest Possible Notional	$	400,000
	Highest Possible Notional	$	400,000
	Lowest Interest Rate	2.125		%
	Highest Interest Rate	3.23		%
	Earliest Maturity Date	2024
	Latest Maturity Date	2024
	-1	Forward Starting Swaps – Designed to partially fix the interest rate in advance of a planned future debt issuance. These swaps have mandatory counterparty terminations in 2015, and are targeted to 2014 issuances.
	In April 2013, the Company's remaining fair value hedges matured.
	In June 2011, the Company's remaining development cash flow hedge matured.
	A three-level valuation hierarchy exists for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels are defined as follows:
	•	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 measurement.
	The Company’s derivative positions are valued using models developed by the respective counterparty as well as models developed internally by the Company that use as their basis readily observable market parameters (such as forward yield curves and credit default swap data). Employee holdings other than Common Shares within the supplemental executive retirement plan (the “SERP”) are valued using quoted market prices for identical assets and are included in other assets and other liabilities on the consolidated balance sheet. The Company’s investment securities are valued using quoted market prices or readily available market interest rate data. Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners are valued using the quoted market price of Common Shares. The fair values disclosed for mortgage notes payable and unsecured debt (including its line of credit) were calculated using indicative rates provided by lenders of similar loans in the case of mortgage notes payable and the private unsecured debt (including its line of credit) and quoted market prices for each underlying issuance in the case of the public unsecured notes.
	The following tables provide a summary of the fair value measurements for each major category of assets and liabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at December 31, 2013 and 2012, respectively (amounts in thousands):
								Fair Value Measurements at Reporting Date Using
								Quoted Prices in
								Active Markets for			Significant Other				Significant
			Balance Sheet					Identical Assets/Liabilities			Observable Inputs				Unobservable Inputs
	Description		Location		12/31/13			(Level 1)			(Level 2)				(Level 3)
	Assets
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps		Other Assets		$	18,712		$	—		$	18,712			$	—
	Supplemental Executive Retirement Plan		Other Assets		83,845			83,845			—				—
	Total				$	102,557		$	83,845		$	18,712			$	—
	Liabilities
	Supplemental Executive Retirement Plan		Other Liabilities		$	83,845		$	83,845		$	—			$	—
	Total				$	83,845		$	83,845		$	—			$	—
	Redeemable Noncontrolling Interests –
	Operating Partnership/Redeemable
	Limited Partners		Mezzanine		$	363,144		$	—		$	363,144			$	—
								Fair Value Measurements at Reporting Date Using
								Quoted Prices in
								Active Markets for			Significant Other				Significant
			Balance Sheet					Identical Assets/Liabilities			Observable Inputs				Unobservable Inputs
	Description		Location		12/31/12			(Level 1)			(Level 2)				(Level 3)
	Assets
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Fair Value Hedges		Other Assets		$	1,523		$	—		$	1,523			$	—
	Supplemental Executive Retirement Plan		Other Assets		70,655			70,655			—				—
	Available-for-Sale Investment Securities		Other Assets		2,214			2,214			—				—
	Total				$	74,392		$	72,869		$	1,523			$	—
	Liabilities
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps		Other Liabilities		$	44,050		$	—		$	44,050			$	—
	Supplemental Executive Retirement Plan		Other Liabilities		70,655			70,655			—				—
	Total				$	114,705		$	70,655		$	44,050			$	—
	Redeemable Noncontrolling Interests –
	Operating Partnership/Redeemable
	Limited Partners		Mezzanine		$	398,372		$	—		$	398,372			$	—
	The following tables provide a summary of the effect of fair value hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
December 31, 2013		Location of Gain/(Loss) Recognized in Income		Amount of Gain/(Loss) Recognized in Income					Income Statement Location of Hedged	Amount of Gain/(Loss)Recognized in Income
Type of Fair Value Hedge		on Derivative		on Derivative			Hedged Item		Item Gain/(Loss)	on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps		Interest expense		$	(1,523	)	Fixed rate debt		Interest expense	$	1,523
Total				$	(1,523	)				$	1,523
December 31, 2012		Location of Gain/(Loss) Recognized in Income		Amount of Gain/(Loss) Recognized in Income					Income Statement Location of Hedged	Amount of Gain/(Loss)Recognized in Income
Type of Fair Value Hedge		on Derivative		on Derivative			Hedged Item		Item Gain/(Loss)	on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps		Interest expense		$	(7,448	)	Fixed rate debt		Interest expense	$	7,448
Total				$	(7,448	)				$	7,448
December 31, 2011		Location of Gain/(Loss) Recognized in Income		Amount of Gain/(Loss) Recognized in Income					Income Statement Location of Hedged	Amount of Gain/(Loss)Recognized in Income
Type of Fair Value Hedge		on Derivative		on Derivative			Hedged Item		Item Gain/(Loss)	on Hedged Item
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Interest Rate Swaps		Interest expense		$	(3,549	)	Fixed rate debt		Interest expense	$	3,549
Total				$	(3,549	)				$	3,549
The following tables provide a summary of the effect of cash flow hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
		Effective Portion								Ineffective Portion
December 31, 2013		Amount of				Location of Gain/(Loss)	Amount of Gain/(Loss)			Location of		Amount of Gain/(Loss)
		Gain/(Loss) Recognized in OCI				Reclassified from Accumulated OCI	Reclassified from Accumulated OCI			Gain/(Loss) Recognized in Income		Reclassified from Accumulated OCI
Type of Cash Flow Hedge		on Derivative				into Income	into Income			on Derivative		into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps/Treasury Locks		$	18,771			Interest expense	$	(20,141	)	N/A		$	—
Total		$	18,771				$	(20,141	)			$	—
		Effective Portion								Ineffective Portion
December 31, 2012		Amount of				Location of Gain/(Loss)	Amount of Gain/(Loss)			Location of		Amount of Gain/(Loss)
		Gain/(Loss) Recognized in OCI				Reclassified from Accumulated	Reclassified from Accumulated			Gain/(Loss) Recognized in Income		Reclassified from Accumulated
		on Derivative				OCI	OCI			on Derivative		OCI
Type of Cash Flow Hedge						into Income	into Income					into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps/Treasury Locks		$	(11,772	)		Interest expense	$	(14,678	)	N/A		$	—
Total		$	(11,772	)			$	(14,678	)			$	—
		Effective Portion								Ineffective Portion
December 31, 2011		Amount of				Location of Gain/(Loss)	Amount of Gain/(Loss)			Location of		Amount of Gain/(Loss)
		Gain/(Loss) Recognized in OCI				Reclassified from Accumulated	Reclassified from Accumulated			Gain/(Loss) Recognized in Income		Reclassified from Accumulated
		on Derivative				OCI	OCI			on Derivative		OCI
Type of Cash Flow Hedge						into Income	into Income					into Income
Derivatives designated as hedging instruments:
Interest Rate Contracts:
Forward Starting Swaps/Treasury Locks		$	(145,090	)		Interest expense	$	(4,343	)	Interest expense		$	(170	)
Development Interest Rate Swaps/Caps		1,322				Interest expense	—			N/A		—
Total		$	(143,768	)			$	(4,343	)			$	(170	)
As of December 31, 2013 and 2012, there were approximately $155.8 million and $194.7 million in deferred losses, net, included in accumulated other comprehensive (loss), respectively, related to derivative instruments. Based on the estimated fair values of the net derivative instruments at December 31, 2013, the Company may recognize an estimated $21.8 million of accumulated other comprehensive (loss) as additional interest expense during the year ending December 31, 2014.
In April 2013, the Company paid approximately $44.7 million to settle three forward starting swaps in conjunction with the issuance of $500.0 million of ten-year fixed rate public notes. The accrued interest of $0.7 million was recorded as interest expense. The remaining amount of $44.0 million will be deferred as a component of accumulated other comprehensive (loss) and recognized as an increase to interest expense over the approximate term of the notes.
In December 2011, the Company paid approximately $153.2 million to settle various forward starting swaps in conjunction with the issuance of $1.0 billion of ten-year fixed rate public notes. The ineffective portion of $0.2 million and accrued interest of $5.9 million were recorded as interest expense. The remaining amount of $147.1 million will be deferred as a component of accumulated other comprehensive (loss) and is recognized as an increase to interest expense over the approximate term of the notes.
The following tables set forth the maturity, amortized cost, gross unrealized gains and losses, book/fair value and interest and other income of the various investment securities held as of December 31, 2013 and 2012, respectively (amounts in thousands):
				Other Assets
December 31, 2013		Maturity		Amortized			Unrealized			Unrealized				Book/		Interest and
Security				Cost			Gains			Losses				Fair Value		Other Income
Available-for-Sale Investment Securities		N/A		$	—		$	—		$	—			$	—	$	2,122
Total				$	—		$	—		$	—			$	—	$	2,122
				Other Assets
December 31, 2012		Maturity		Amortized			Unrealized			Unrealized				Book/		Interest and
Security				Cost			Gains			Losses				Fair Value		Other Income
Available-for-Sale Investment Securities		N/A		$	675		$	1,539		$	—			$	2,214	$	—
Total				$	675		$	1,539		$	—			$	2,214	$	—
During the year ended December 31, 2013, the Company sold all of its investment securities, receiving proceeds of approximately $2.8 million, and recorded a $2.1 million realized gain on sale (specific identification) which is included in interest and other income.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share And Earnings Per Unit [Text Block]	'
	10	Earnings Per Share and Earnings Per Unit
	Equity Residential
	The following tables set forth the computation of net income per share – basic and net income per share – diluted for the Company (amounts in thousands except per share amounts):
		Year Ended December 31,
		2013			2012			2011
	Numerator for net income per share – basic:
	(Loss) income from continuing operations	$	(168,174	)	$	160,298		$	(72,941	)
	Allocation to Noncontrolling Interests – Operating Partnership, net	6,834			(6,417		)	3,880
	Net loss (income) attributable to Noncontrolling Interests – Partially Owned Properties	538			(844		)	(832		)
	Preferred distributions	(4,145		)	(10,355		)	(13,865		)
	Premium on redemption of Preferred Shares	—			(5,152		)	—
	(Loss) income from continuing operations available to Common Shares, net of	(164,947		)	137,530			(83,758		)
	Noncontrolling Interests
	Discontinued operations, net of Noncontrolling Interests	1,991,415			688,682			963,478
	Numerator for net income per share – basic	$	1,826,468		$	826,212		$	879,720
	Numerator for net income per share – diluted (1):
	Income from continuing operations				$	160,298
	Net (income) attributable to Noncontrolling Interests – Partially Owned Properties				(844		)
	Preferred distributions				(10,355		)
	Premium on redemption of Preferred Shares				(5,152		)
	Income from continuing operations available to Common Shares				143,947
	Discontinued operations, net				720,906
	Numerator for net income per share – diluted (1)	$	1,826,468		$	864,853		$	879,720
	Denominator for net income per share – basic and diluted (1):
	Denominator for net income per share – basic	354,305			302,701			294,856
	Effect of dilutive securities:
	OP Units				13,853
	Long-term compensation shares/units				3,212
	Denominator for net income per share – diluted (1)	354,305			319,766			294,856
	Net income per share – basic	$	5.16		$	2.73		$	2.98
	Net income per share – diluted	$	5.16		$	2.7		$	2.98
	Net income per share – basic:
	(Loss) income from continuing operations available to Common Shares, net of	$	(0.466	)	$	0.454		$	(0.284	)
	Noncontrolling Interests
	Discontinued operations, net of Noncontrolling Interests	5.621			2.275			3.268
	Net income per share – basic	$	5.155		$	2.729		$	2.984
	Net income per share – diluted (1):
	(Loss) income from continuing operations available to Common Shares	$	(0.466	)	$	0.45		$	(0.284	)
	Discontinued operations, net	5.621			2.255			3.268
	Net income per share – diluted	$	5.155		$	2.705		$	2.984
	Distributions declared per Common Share outstanding	$	1.85		$	1.78		$	1.58
	-1	Potential common shares issuable from the assumed conversion of OP Units and the exercise/vesting of long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per share calculation as the Company had a loss from continuing operations for the years ended December 31, 2013 and 2011.
	For additional disclosures regarding the employee share options and restricted shares, see Notes 2 and 12.
	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):
		Year Ended December 31,
		2013			2012			2011
	Numerator for net income per Unit – basic and diluted (1):
	(Loss) income from continuing operations	$	(168,174	)	$	160,298		$	(72,941	)
	Net loss (income) attributable to Noncontrolling Interests – Partially Owned Properties	538			(844		)	(832		)
	Allocation to Preference Units	(4,145		)	(10,355		)	(13,865		)
	Allocation to premium on redemption of Preference Units	—			(5,152		)	—
	(Loss) income from continuing operations available to Units	(171,781		)	143,947			(87,638		)
	Discontinued operations, net	2,073,527			720,906			1,008,138
	Numerator for net income per Unit – basic and diluted (1)	$	1,901,746		$	864,853		$	920,500
	Denominator for net income per Unit – basic and diluted (1):
	Denominator for net income per Unit – basic	368,038			316,554			308,062
	Effect of dilutive securities:
	Dilution for Units issuable upon assumed exercise/vesting of the Company's				3,212
	long-term compensation shares/units
	Denominator for net income per Unit – diluted (1)	368,038			319,766			308,062
	Net income per Unit – basic	$	5.16		$	2.73		$	2.98
	Net income per Unit – diluted	$	5.16		$	2.7		$	2.98
Net income per Unit – basic:
(Loss) income from continuing operations available to Units	$	(0.466	)	$	0.454		$	(0.284	)
Discontinued operations, net	5.621			2.275			3.268
Net income per Unit – basic	$	5.155		$	2.729		$	2.984
Net income per Unit – diluted (1):
(Loss) income from continuing operations available to Units	$	(0.466	)	$	0.45		$	(0.284	)
Discontinued operations, net	5.621			2.255			3.268
Net income per Unit – diluted	$	5.155		$	2.705		$	2.984
Distributions declared per Unit outstanding	$	1.85		$	1.78		$	1.58
-1	Potential Units issuable from the assumed exercise/vesting of the Company's long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per Unit calculation as the Operating Partnership had a loss from continuing operations for the years ended December 31, 2013 and 2011.
For additional disclosures regarding the employee share options and restricted shares, see Notes 2 and 12.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	11	Discontinued Operations
	The Company has presented separately as discontinued operations in all periods the results of operations for all consolidated assets disposed of and all properties held for sale, if any.
	The components of discontinued operations are outlined below and include the results of operations for the respective periods that the Company owned such assets during each of the years ended December 31, 2013, 2012 and 2011 (amounts in thousands).
		Year Ended December 31,
		2013			2012			2011
	REVENUES
	Rental income	$	121,942		$	445,832		$	560,399
	Total revenues	121,942			445,832			560,399
	EXPENSES (1)
	Property and maintenance	36,792			103,371			160,315
	Real estate taxes and insurance	11,903			41,208			50,173
	Property management	1			211			266
	Depreciation	34,380			124,323			157,441
	General and administrative	85			92			55
	Total expenses	83,161			269,205			368,250
	Discontinued operating income	38,781			176,627			192,149
	Interest and other income	217			156			198
	Other expenses	(3		)	(170		)	(421		)
	Interest (2):
	Expense incurred, net	(1,296		)	(3,811		)	(9,268		)
	Amortization of deferred financing costs	(228		)	(140		)	(1,230		)
	Income and other tax (expense) benefit	(449		)	(34		)	221
	Discontinued operations	37,022			172,628			181,649
	Net gain on sales of discontinued operations	2,036,505			548,278			826,489
	Discontinued operations, net	$	2,073,527		$	720,906		$	1,008,138
	-1	Includes expenses paid in the current period for properties sold in prior periods related to the Company’s period of ownership.
	-2	Includes only interest expense specific to secured mortgage notes payable for properties sold.
	For the properties sold during 2013, the investment in real estate, net of accumulated depreciation, and the mortgage notes payable balances at December 31, 2012 were $2.0 billion and $34.4 million, respectively.

Share_Incentive_Plans

Share Incentive Plans	12 Months Ended
	Dec. 31, 2013
Share-based Compensation [Abstract]	'
Share Incentive Plans	'
	12	Share Incentive Plans
	Any Common Shares issued pursuant to EQR's incentive equity compensation and employee share purchase plans will result in ERPOP issuing OP Units to EQR on a one-for-one basis with ERPOP receiving the net cash proceeds of such issuances.
	On June 16, 2011, the shareholders of EQR approved the Company's 2011 Plan. The 2011 Plan reserved 12,980,741 Common Shares for issuance. In conjunction with the approval of the 2011 Plan, no further awards may be granted under the 2002 Share Incentive Plan. The 2011 Plan expires on June 16, 2021. As of December 31, 2013, 9,562,775 shares were available for future issuance.
	Pursuant to the 2011 Plan, the 2002 Share Incentive Plan, as restated, and the Amended and Restated 1993 Share Option and Share Award Plan, as amended (collectively the “Share Incentive Plans”), officers, trustees and key employees of the Company may be granted share options to acquire Common Shares (“Options”) including non-qualified share options (“NQSOs”), incentive share options (“ISOs”) and share appreciation rights (“SARs”), or may be granted restricted or non-restricted shares/units (including performance-based awards), subject to conditions and restrictions as described in the Share Incentive Plans. Options, SARs, restricted shares, performance shares and LTIP Units (see discussion below) are sometimes collectively referred to herein as “Awards”.
	The Options are generally granted at the fair market value of the Company’s Common Shares at the date of grant, vest in three equal installments over a three-year period, are exercisable upon vesting and expire ten years from the date of grant (see additional valuation discussion in Note 2). The exercise price for all Options under the Share Incentive Plans is equal to the fair market value of the underlying Common Shares at the time the Option is granted. Options exercised result in new Common Shares being issued on the open market. The 2002 Share Incentive Plan, as amended, will terminate at such time as all outstanding Awards have expired or have been exercised/vested. The Amended and Restated 1993 Share Option and Share Award Plan, as amended, terminated in the first quarter of 2013 as all outstanding Awards have expired or have been exercised/vested. The Board of Trustees may at any time amend or terminate the Share Incentive Plans, but termination will not affect Awards previously granted. Any Options which had vested prior to such a termination would remain exercisable by the holder.
	Restricted shares are generally granted at the fair market value of the Company's Common Shares at the date of grant. Restricted shares that have been awarded through December 31, 2013 generally vest three years from the award date. In addition, the Company’s unvested restricted shareholders have the same voting rights as any other Common Share holder. During the three-year period of restriction, the Company’s unvested restricted shareholders receive quarterly dividend payments on their shares at the same rate and on the same date as any other Common Share holder. As a result, dividends paid on unvested restricted shares are included as a component of retained earnings (included in general partner's capital in the Operating Partnership's financial statements) and have not been considered in reducing net income available to Common Shares/Units in a manner similar to the Company’s preferred share/preference unit dividends for the earnings per share/Unit calculation. If employment is terminated prior to the lapsing of the restriction, the shares are generally canceled.
	In December 2008, the Company’s then existing 2002 Share Incentive Plan was amended to allow for the issuance of long-term incentive plan units (“LTIP Units”) to officers of the Company as an alternative to the Company’s restricted shares. The 2011 Plan also allows for the issuance of LTIP Units. LTIP Units are a class of partnership interests that under certain conditions, including vesting, are convertible by the holder into an equal number of OP Units, which are redeemable by the holder for Common Shares on a one-for-one basis or the cash value of such shares at the option of the Company. In connection with the grant of long-term incentive compensation for services provided during a year, officers of the Company are allowed to choose, on a one-for-one basis, between restricted shares and LTIP Units. In January 2011, certain holders of restricted shares converted these shares into LTIP Units. Similar to restricted shares, LTIP Units are generally granted at the fair market value of the Company's Common Shares at the date of grant and generally vest three years from the award date. In addition, LTIP Unit holders receive quarterly dividend payments on their LTIP Units at the same rate and on the same date as any other OP Unit holder. As a result, dividends paid on LTIP Units are included as a component of Noncontrolling Interests – Operating Partnership/Limited Partners' capital and have not been considered in reducing net income available to Common Shares/Units in a manner similar to the Company’s preferred share/preference unit dividends for the earnings per share/Unit calculation. If employment is terminated prior to vesting, the LTIP Units are generally canceled. An LTIP Unit will automatically convert to an OP Unit when the capital account of each LTIP Unit increases (“books-up”) to a specified target. If the capital target is not attained within ten years following the date of issuance, the LTIP Unit will automatically be canceled and no compensation will be payable to the holder of such canceled LTIP Unit.
	All Trustees, with the exception of the Company's non-executive Chairman and employee Trustees, are granted options and restricted shares that vest one-year from the grant date that corresponds to the term for which he or she has been elected to serve. The non-executive Chairman's grants vest over the same term or period as all other employees.
	The Company's Share Incentive Plans provide for certain benefits upon retirement. For employees hired prior to January 1, 2009, retirement generally means the termination of employment (other than for cause): (i) on or after age 62; or (ii) prior to age 62 after meeting the requirements of the Rule of 70 (described below). For employees hired after January 1, 2009, retirement generally means the termination of employment (other than for cause) after meeting the requirements of the Rule of 70. For Trustees, retirement generally means termination of service on the Board (other than for cause) on or after age 72.
	The Rule of 70 is met when an employee’s years of service with the Company (which must be at least 15 years) plus his or her age (which must be at least 55 years) on the date of termination equals or exceeds 70 years. In addition, the employee must give the Company at least 6 months’ advance written notice of his or her intention to retire and sign a release upon termination of employment, releasing the Company from customary claims and agreeing to ongoing non-competition and employee non-solicitation provisions.
	Under the Company's definitions of retirement, several of its executive officers, including its Chief Executive Officer, and its non-executive Chairman, are retirement eligible.
	For employees hired prior to January 1, 2009 who retire at or after age 62 or for Trustees who retire at or after age 72, such employee’s or Trustee's unvested restricted shares, LTIP Units and share options would immediately vest, and share options would continue to be exercisable for the balance of the applicable ten-year option period, as is provided under the Share Incentive Plans. For all other employees (those hired after January 1, 2009 and those hired before such date who choose to retire prior to age 62), upon such retirement under the Rule of 70 definition of retirement of employees, such employee’s unvested restricted shares, LTIP Units and share options would continue to vest per the original vesting schedule (subject to immediate vesting upon the occurrence of a subsequent change in control of the Company or the employee’s death), and options would continue to be exercisable for the balance of the applicable ten-year option period, subject to the employee’s compliance with the non-competition and employee non-solicitation provisions. If an employee violates these provisions after such retirement, all unvested restricted shares, unvested LTIP Units and unvested and vested share options at the time of the violation would be void, unless otherwise determined by the Compensation Committee of the Board of Trustees.
	The following tables summarize compensation information regarding the restricted shares, LTIP Units, share options and Employee Share Purchase Plan (“ESPP”) for the three years ended December 31, 2013, 2012 and 2011 (amounts in thousands):
		Year Ended December 31, 2013
		Compensation			Compensation				Compensation				Dividends
		Expense			Capitalized				Equity				Incurred
	Restricted shares	$	12,185		$	1,079			$	13,264			$	967
	LTIP Units	13,108			501				13,609				520
	Share options	9,569			945				10,514				—
	ESPP discount	612			20				632				—
	Total	$	35,474		$	2,545			$	38,019			$	1,487
		Year Ended December 31, 2012
		Compensation			Compensation				Compensation				Dividends
		Expense			Capitalized				Equity				Incurred
	Restricted shares	$	8,014		$	922			$	8,936			$	949
	LTIP Units	5,004			303				5,307				234
	Share options	10,970			782				11,752				—
	ESPP discount	844			121				965				—
	Total	$	24,832		$	2,128			$	26,960			$	1,183
		Year Ended December 31, 2011
		Compensation			Compensation				Compensation				Dividends
		Expense			Capitalized				Equity				Incurred
	Restricted shares	$	8,041		$	1,061			$	9,102			$	1,121
	LTIP Units	3,344			297				3,641				199
	Share options	8,711			834				9,545				—
	ESPP discount	1,081			113				1,194				—
	Total	$	21,177		$	2,305			$	23,482			$	1,320
	Compensation expense is generally recognized for Awards as follows:
	•	Restricted shares, LTIP Units and share options – Straight-line method over the vesting period of the options or shares regardless of cliff or ratable vesting distinctions.
	•	ESPP discount – Immediately upon the purchase of common shares each quarter.
	The Company accelerates the recognition of compensation expense for all Awards for those individuals approaching or meeting the retirement age criteria discussed above. The total compensation expense related to Awards not yet vested at December 31, 2013 is $16.5 million (excluding the accelerated expenses for individuals approaching or meeting the retirement age criteria discussed above), which is expected to be recognized over a weighted average term of 1.45 years.
	See Note 2 for additional information regarding the Company’s share-based compensation.
	The table below summarizes the Award activity of the Share Incentive Plans for the three years ended December 31, 2013, 2012 and 2011:
		Common		Weighted				Restricted			Weighted				LTIP		Weighted
		Shares Subject		Average				Shares			Average Fair				Units		Average Fair
		to Options		Exercise Price							Value per						Value per
				per Option							Restricted Share						LTIP Unit
	Balance at December 31, 2010	10,106,488			$33.00			911,950				$32.05			247,508			$25.62
	Awards granted (1)	1,491,311			$53.70			170,588				$53.99			223,452			$46.64
	Awards exercised/vested (2) (3) (4)	(2,945,950	)		$32.27			(258,068	)			$38.32			(101,988	)		$38.57
	Awards forfeited	(41,559	)		$35.14			(126,960	)			$37.19			(1,352	)		$27.79
	Awards expired	(16,270	)		$44.13			—			—				—		—
	Balance at December 31, 2011	8,594,020			$36.81			697,510				$34.17			367,620			$34.80
	Awards granted (1)	1,164,484			$60.22			140,980				$60.20			70,235			$57.24
	Awards exercised/vested (2) (3) (4)	(1,608,425	)		$30.87			(300,809	)			$23.79			(152,821	)		$21.11
	Awards forfeited	(23,795	)		$51.55			(12,728	)			$46.25			—		—
	Awards expired	(11,029	)		$35.53			—			—				—		—
	Balance at December 31, 2012	8,115,255			$41.31			524,953				$46.81			285,034			$48.41
	Awards granted (1)	1,006,444			$55.07			246,731				$55.37			281,931			$52.73
	Awards exercised/vested (2) (3) (4)	(586,017	)		$29.34			(253,816	)			$36.81			(93,335	)		$32.97
	Awards forfeited	(47,819	)		$56.16			(17,634	)			$55.74			(2,374	)		$56.72
	Awards expired	(17,331	)		$47.51			—			—				—		—
	Balance at December 31, 2013	8,470,532			$43.67			500,234				$55.79			471,256			$55.67
-1	The weighted average grant date fair value for Options granted during the years ended December 31, 2013, 2012 and 2011 was $7.97 per share, $8.55 per share and $8.18 per share, respectively.
-2	The aggregate intrinsic value of options exercised during the years ended December 31, 2013, 2012 and 2011 was $16.7 million, $46.7 million and $74.8 million, respectively. These values were calculated as the difference between the strike price of the underlying awards and the per share price at which each respective award was exercised.
-3	The fair value of restricted shares vested during the years ended December 31, 2013, 2012 and 2011 was $13.9 million, $18.0 million  and $14.0 million, respectively.
-4	The fair value of LTIP Units vested during the years ended December 31, 2013, 2012 and 2011 was $5.1 million, $9.1 million and $5.5 million, respectively.
The following table summarizes information regarding options outstanding and exercisable at December 31, 2013:
		Options Outstanding (1)								Options Exercisable (2)
Range of Exercise Prices		Options		Weighted		Weighted				Options			Weighted
				Average		Average							Average
				Remaining		Exercise Price							Exercise Price
				Contractual Life in Years
$18.70 to $24.93		1,235,980		5.08			$23.07			1,235,980				$23.07
$24.94 to $31.16		386,723		0.08			$29.25			386,723				$29.25
$31.17 to $37.39		1,332,280		4.58			$32.61			1,332,280				$32.61
$37.40 to $43.62		1,347,487		3.2			$40.46			1,347,487				$40.46
$43.63 to $49.86		61,187		6.55			$48.41			23,059				$48.06
$49.87 to $56.09		2,774,770		6.99			$53.91			1,226,038				$53.64
$56.10 to $62.32		1,332,105		8.2			$59.76			494,922				$59.98
$18.70 to $62.32		8,470,532		5.6			$43.67			6,046,489				$38.76
Vested and expected to vest		8,293,422		5.55			$43.42
as of December 31, 2013
-1	The aggregate intrinsic value of options outstanding that are vested and expected to vest as of December 31, 2013 is $85.6 million.
-2	The aggregate intrinsic value and weighted average remaining contractual life in years of options exercisable as of December 31, 2013 is $85.5 million and 4.5 years, respectively.
Note: The aggregate intrinsic values in Notes (1) and (2) above were both calculated as the excess, if any, between the Company’s closing share price of $51.87 per share on December 31, 2013 and the strike price of the underlying awards.
As of December 31, 2012 and 2011, 5,385,907 Options (with a weighted average exercise price of $35.40) and 5,415,550 Options (with a weighted average exercise price of $34.64) were exercisable, respectively.

Employee_Plans

Employee Plans	12 Months Ended
	Dec. 31, 2013
Employee Plans [Abstract]	'
Employee Plans	'
	13	Employee Plans
	The Company established an Employee Share Purchase Plan to provide each employee and trustee the ability to annually acquire up to $100,000 of Common Shares of EQR. In 2003, EQR's shareholders approved an increase in the aggregate number of Common Shares available under the ESPP to 7,000,000 (from 2,000,000). The Company has 3,107,341 Common Shares available for purchase under the ESPP at December 31, 2013. The Common Shares may be purchased quarterly at a price equal to 85% of the lesser of: (a) the closing price for a share on the last day of such quarter; and (b) the greater of: (i) the closing price for a share on the first day of such quarter, and (ii) the average closing price for a share for all the business days in the quarter. The following table summarizes information regarding the Common Shares issued under the ESPP (the net proceeds noted below were contributed to ERPOP in exchange for OP Units):
		Year Ended December 31,
		2013	2012	2011
		(Amounts in thousands except share and per share amounts)
	Shares issued	73,468	110,054	113,107
	Issuance price ranges	$44.26 – $48.17	$46.33 – $51.78	$44.04 – $51.19
	Issuance proceeds	$3,401	$5,399	$5,262
	The Company established a defined contribution plan (the “401(k) Plan”) to provide retirement benefits for employees that meet minimum employment criteria. The Company matches dollar for dollar up to the first 3% of eligible compensation that a participant contributes to the 401(k) Plan. Participants are vested in the Company’s contributions over five years. The Company recognized an expense in the amount of $4.2 million, $4.4 million and $3.7 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	The Company established a supplemental executive retirement plan (the “SERP”) to provide certain officers and trustees an opportunity to defer a portion of their eligible compensation in order to save for retirement. The SERP is restricted to investments in Common Shares, certain marketable securities that have been specifically approved and cash equivalents. The deferred compensation liability represented in the SERP and the securities issued to fund such deferred compensation liability are consolidated by the Company and carried on the Company’s balance sheet, and the Company’s Common Shares held in the SERP are accounted for as a reduction to paid in capital (included in general partner's capital in the Operating Partnership's financial statements).

Distribution_Reinvestment_and_

Distribution Reinvestment and Share Purchase Plan	12 Months Ended
	Dec. 31, 2013
Distribution Reinvestment and Share Purchase Plan [Abstract]	'
Distribution Reinvestment and Share Purchase Plan	'
	14	Distribution Reinvestment and Share Purchase Plan
	On December 16, 2008, the Company filed with the SEC a Form S-3 Registration Statement to register 5,000,000 Common Shares pursuant to a Distribution Reinvestment and Share Purchase Plan (the "DRIP Plan"). The registration statement was automatically declared effective the same day and was to expire at the earlier of the date on which all 5,000,000 shares had been issued or December 16, 2011. On November 18, 2011, the Company filed with the SEC a Form S-3 Registration Statement to register 4,850,000 Common Shares under the DRIP Plan, which included the remaining shares available for issuance under the 2008 registration, which terminated as of such date. The registration statement was automatically declared effective the same day and expires at the earlier of the date on which all 4,850,000 shares have been issued or November 18, 2014. The Company has 4,814,608 Common Shares available for issuance under the DRIP Plan at December 31, 2013.
	The DRIP Plan provides holders of record and beneficial owners of Common Shares and Preferred Shares with a simple and convenient method of investing cash distributions in additional Common Shares (which is referred to herein as the “Dividend Reinvestment – DRIP Plan”). Common Shares may also be purchased on a monthly basis with optional cash payments made by participants in the DRIP Plan and interested new investors, not currently shareholders of EQR, at the market price of the Common Shares less a discount ranging between 0% and 5%, as determined in accordance with the DRIP Plan (which is referred to herein as the “Share Purchase – DRIP Plan”). Common Shares purchased under the DRIP Plan may, at the option of EQR, be directly issued by EQR or purchased by EQR's transfer agent in the open market using participants’ funds. The net proceeds from any Common Share issuances are contributed to ERPOP in exchange for OP Units.

Transactions_With_Related_Part

Transactions With Related Parties	12 Months Ended
	Dec. 31, 2013
Transactions With Related Parties [Abstract]	'
Related Party Transactions Disclosure [Text Block]	'
	15	Transactions with Related Parties
	Pursuant to the terms of the partnership agreement for the Operating Partnership, ERPOP is required to reimburse EQR for all expenses incurred by EQR in excess of income earned by EQR through its indirect 1% ownership of various entities. Amounts paid on behalf of EQR are reflected in the consolidated statements of operations and comprehensive income as general and administrative expenses.
	The Company leases its corporate headquarters from an entity controlled by EQR’s Chairman of the Board of Trustees. The lease terminates on January 31, 2022. Amounts incurred for such office space for the years ended December 31, 2013, 2012 and 2011, respectively, were approximately $1.7 million, $1.3 million and $2.2 million. The Company believes these amounts equal market rates for such rental space.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	16	Commitments and Contingencies
	The Company, as an owner of real estate, is subject to various Federal, state and local environmental laws. Compliance by the Company with existing laws has not had a material adverse effect on the Company. However, the Company cannot predict the impact of new or changed laws or regulations on its current properties or on properties that it may acquire in the future.
	The Company is party to a housing discrimination lawsuit brought by a non-profit civil rights organization in April 2006 in the U.S. District Court for the District of Maryland. The suit alleges that the Company designed and built approximately 300 of its properties in violation of the accessibility requirements of the Fair Housing Act and Americans With Disabilities Act. The suit seeks actual and punitive damages, injunctive relief (including modification of non-compliant properties), costs and attorneys' fees. The Company believes it has a number of viable defenses, including that a majority of the named properties were completed before the operative dates of the statutes in question and/or were not designed or built by the Company. Accordingly, the Company is defending the suit vigorously. Due to the pendency of the Company's defenses and the uncertainty of many other critical factual and legal issues, it is not possible to determine or predict the outcome of the suit or a possible loss or a range of loss, and no amounts have been accrued at December 31, 2013. While no assurances can be given, the Company does not believe that the suit, if adversely determined, would have a material adverse effect on the Company.
	The Company does not believe there is any other litigation pending or threatened against it that, individually or in the aggregate, may reasonably be expected to have a material adverse effect on the Company.
	As of December 31, 2013, the Company has 14 consolidated projects (including 400 Park Avenue South in New York City which the Company is jointly developing with Toll Brothers that is discussed below and Park Aire in which the Company acquired a 95% interest in connection with the Archstone Transaction that is discussed in Note 6) totaling 4,017 apartment units in various stages of development with commitments to fund of approximately $768.1 million and estimated completion dates ranging through June 30, 2016, as well as other completed development projects that are in various stages of lease up or are stabilized. Some of the projects are being developed solely by the Company, while others are being co-developed with various third party development partners. The development venture agreements with these partners are primarily deal-specific, with differing terms regarding profit-sharing, equity contributions, returns on investment, buy-sell agreements and other customary provisions. The Company is the "general" or "managing" partner of the development ventures.
	As of December 31, 2013, the Company has one unconsolidated project totaling 176 apartment units under development with an estimated completion date of December 31, 2014, as well as three completed development projects that are currently in lease up. These projects are all being co-developed with various third party development partners. The development venture agreements with these partners are primarily deal-specific, with differing terms regarding profit-sharing, equity contributions, returns on investment, buy-sell agreements and other customary provisions. The Company currently has no further funding obligations for Domain, Nexus Sawgrass and San Norterra. While the Company is the managing member of the Domain and Nexus Sawgrass joint ventures, was responsible for constructing both projects and has given certain construction cost overrun guarantees, the joint venture partner has significant participating rights and has active involvement in and oversight of the ongoing projects. The Domain and Nexus Sawgrass buy-sell arrangements contain provisions that provide the right, but not the obligation, for the Company to acquire the partner’s interests or sell its interests at any time following the occurrence of certain pre-defined events (including at stabilization) described in the development venture agreements. The respective partner for San Norterra and Parkside at Emeryville is the “general” or “managing” partner of the development venture and the Company does not have substantive kick-out or participating rights. The Company has given a repayment guaranty on the construction loan for Parkside at Emeryville of 50% of the outstanding balance, up to a maximum of $19.7 million, and has given certain construction cost overrun guarantees.
	In December 2011, the Company and Toll Brothers (NYSE: TOL) jointly acquired a vacant land parcel at 400 Park Avenue South in New York City. The Company's and Toll Brothers' allocated portions of the purchase price were approximately $76.1 million and $57.9 million, respectively. The Company is the managing member and Toll Brothers does not have substantive kick-out or participating rights. Until the core and shell of the building is complete, the building and land will be owned jointly and are required to be consolidated on the Company's balance sheet. Thereafter, the Company will solely own and control the rental portion of the building (floors 2-22) and Toll Brothers will solely own and control the for sale portion of the building (floors 23-40). Once the core and shell are complete, the Toll Brothers' portion of the property will be deconsolidated from the Company's balance sheet. The acquisition was financed through contributions by the Company and Toll Brothers of approximately $102.5 million and $75.7 million, respectively, which included the land purchase noted above, restricted deposits and taxes and fees. As of December 31, 2013, the Company's and Toll Brothers' consolidated contributions to the joint venture were approximately $292.6 million, of which Toll Brothers' noncontrolling interest balance totaled $111.7 million.
	During the years ended December 31, 2013, 2012 and 2011, total operating lease payments expensed for office space, including a portion of real estate taxes, insurance, repairs and utilities, and including rent due under 13 ground leases, aggregated $13.2 million, $8.1 million and $7.1 million, respectively.
	The Company has entered into a retirement benefits agreement with its Chairman of the Board of Trustees and deferred compensation agreements with its Vice Chairman and two former chief executive officers (one of which was fully paid out in January 2013). During the years ended December 31, 2013, 2012 and 2011, the Company recognized compensation expense of $0.5 million, $1.0 million and $1.0 million, respectively, related to these agreements.
	The following table summarizes the Company’s contractual obligations for minimum rent payments under operating leases and deferred compensation for the next five years and thereafter as of December 31, 2013:
	Payments Due by Year (in thousands)
			2014		2015		2016		2017		2018		Thereafter		Total
	Operating Leases:
	Minimum Rent Payments (a)		$	14,518	$	14,935	$	15,084	$	14,961	$	14,830	$	869,687	$	944,015
	Other Long-Term Liabilities:
	Deferred Compensation (b)		1,378		1,705		1,705		1,705		1,705		5,596		13,794
	(a)	Minimum basic rent due for various office space the Company leases and fixed base rent due on ground leases for 14 properties/parcels.
	(b)	Estimated payments to the Company's Chairman, Vice Chairman and one former CEO based on actual and planned retirement dates.

Reportable_Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2013
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]	'
Segment Reporting Disclosure [Text Block]	'
	17	Reportable Segments
	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 operating decision maker. The chief operating decision maker decides how resources are allocated and assesses performance on a recurring basis at least quarterly.
	The Company’s primary business is the acquisition, development and management of multifamily residential properties, which includes the generation of rental and other related income through the leasing of apartment units to residents. The chief operating decision maker evaluates the Company's operating performance geographically by market and both on a same store and non-same store basis. The Company’s operating segments located in its core markets represent its reportable segments (with the aggregation of Los Angeles, Orange County and San Diego into the Southern California reportable segment). The Company's operating segments located in its non-core markets that are not material have also been aggregated in the tables presented below.
	The Company’s fee and asset management and development (including its partially owned properties) 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 revenues are from external customers and there is no customer who contributed 10% or more of the Company’s total revenues during the three years ended December 31, 2013, 2012 or 2011.
	The primary financial measure for the Company’s rental real estate segment is net operating income (“NOI”), which represents rental income less: 1) property and maintenance expense; 2) real estate taxes and insurance expense; and 3) property management expense (all as reflected in the accompanying consolidated statements of operations and comprehensive income). The Company believes that NOI is helpful to investors as a supplemental measure of its operating performance because it is a direct measure of the actual operating results of the Company’s apartment communities. Current year NOI is compared to prior year NOI and current year budgeted NOI as a measure of financial performance. The following tables present NOI for each segment from our rental real estate specific to continuing operations for the years ended December 31, 2013, 2012 and 2011, respectively, as well as total assets and capital expenditures at December 31, 2013 and 2012, respectively (amounts in thousands):
			Year Ended December 31, 2013									Year Ended December 31, 2012							Year Ended December 31, 2011
			Rental Income			Operating Expenses			NOI			Rental Income		Operating Expenses		NOI			Rental Income			Operating Expenses			NOI
	Same store (1)
	Boston		$	175,031		$	57,261		$	117,770		$	168,063	$	54,888	$	113,175		$	142,514		$	49,317		$	93,197
	Denver		100,425			30,028			70,397			93,571		28,204		65,367			99,681			32,564			67,117
	New York		286,345			114,587			171,758			274,683		109,667		165,016			254,441			104,492			149,949
	San Francisco		173,011			59,104			113,907			159,535		57,373		102,162			126,951			43,627			83,324
	Seattle		129,283			43,718			85,565			122,267		41,041		81,226			122,494			45,275			77,219
	South Florida		185,361			69,891			115,470			177,675		67,811		109,864			174,417			66,838			107,579
	Southern California		333,917			107,346			226,571			320,749		103,925		216,824			299,508			98,907			200,601
	Washington DC		253,056			76,033			177,023			247,880		75,580		172,300			240,755			75,492			165,263
	Non-core		132,851			49,275			83,576			128,816		48,548		80,268			310,688			122,159			188,529
	Total same store		1,769,280			607,243			1,162,037			1,693,239		587,037		1,106,202			1,771,449			638,671			1,132,778
	Non-same store/other (2) (3)
	Boston		61,139			18,238			42,901			—		—		—			8,115			2,361			5,754
	Denver		2,805			744			2,061			1,325		429		896			—			1			(1		)
	New York		136,182			43,055			93,127			14,611		5,988		8,623			6,794			366			6,428
	San Francisco		119,749			42,851			76,898			7,268		3,022		4,246			3,889			1,796			2,093
	Seattle		19,462			6,284			13,178			4,747		1,510		3,237			6,012			2,149			3,863
	South Florida		2,653			1,031			1,622			—		—		—			14,488			5,165			9,323
	Southern California		74,123			31,599			42,524			3,040		1,179		1,861			30,539			12,144			18,395
	Washington DC		179,077			58,759			120,318			13,124		3,984		9,140			36,657			11,373			25,284
	Other (3)		13,534			17,998			(4,464		)	575		17,666		(17,091		)	(3,477		)	7,326			(10,803		)
	Properties sold in 2013 (4)		—			—			—			—		—		—			(358,272		)	(116,699		)	(241,573		)
	Total non-same store/other		608,724			220,559			388,165			44,690		33,778		10,912			(255,255		)	(74,018		)	(181,237		)
	Total		$	2,378,004		$	827,802		$	1,550,202		$	1,737,929	$	620,815	$	1,117,114		$	1,516,194		$	564,653		$	951,541
	-1	For the years ended December 31, 2013 and 2012, same store primarily includes all properties acquired or completed and stabilized prior to January 1, 2012, less properties subsequently sold, which represented 80,247 apartment units. For the year ended December 31, 2011, same store primarily includes all properties acquired or completed and stabilized prior to January 1, 2011, less properties subsequently sold, which represented 98,577 apartment units.
	-2	For the years ended December 31, 2013 and 2012, non-same store primarily includes properties acquired after January 1, 2012, plus any properties in lease-up and not stabilized as of January 1, 2012 . For the year ended December 31, 2011, non-same store primarily includes properties acquired after January 1, 2011, plus any properties in lease-up and not stabilized as of January 1, 2011.
	-3	Other includes development and other corporate operations.
	-4	Reflects discontinued operations for properties sold during 2013.
			Year Ended December 31, 2013						Year Ended December 31, 2012
			Total Assets			Capital Expenditures			Total Assets			Capital Expenditures
	Same store (1)
	Boston		$	1,087,370		$	15,630		$	1,133,098		$	22,592
	Denver		520,999			5,330			542,243			4,593
	New York		2,678,546			8,982			2,742,346			12,437
	San Francisco		968,840			11,767			999,267			18,010
	Seattle		835,584			6,398			865,068			6,892
	South Florida		1,157,283			14,550			1,193,506			17,338
	Southern California		2,177,336			16,580			2,250,301			17,747
	Washington DC		1,873,897			10,069			1,941,446			15,426
	Non-core		645,418			5,186			674,360			6,989
	Total same store		11,945,273			94,492			12,341,635			122,024
	Non-same store/other (2) (3)
	Boston		946,747			2,097			—			—
	Denver		20,481			54			20,974			5
	New York		2,092,454			3,024			406,013			142
	San Francisco		1,824,550			9,989			178,339			1,176
	Seattle		312,240			1,598			90,205			67
	South Florida		50,414			300			—			—
	Southern California		1,078,038			3,975			70,389			141
	Washington DC		2,664,702			14,877			276,901			1,062
	Other (3)		1,899,646			5,410			3,816,544			28,211
	Total non-same store/other		10,889,272			41,324			4,859,365			30,804
	Total		$	22,834,545		$	135,816		$	17,201,000		$	152,828
	-1	Same store primarily includes all properties acquired or completed and stabilized prior to January 1, 2012, less properties subsequently sold, which represented 80,247 apartment units.
	-2	Non-same store primarily includes properties acquired after January 1, 2012, plus any properties in lease-up and not stabilized as of January 1, 2012.
-3	Other includes development and other corporate operations.
Note: Markets/Metro Areas included in the above Southern California and Non-core segments are as follows:
(a) Southern California – Los Angeles, Orange County and San Diego.
(b) Non-core – Inland Empire, CA, New England (excluding Boston), Orlando and Phoenix.
The following table presents a reconciliation of NOI from our rental real estate specific to continuing operations for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
		Year Ended December 31,
		2013			2012			2011
Rental income		$	2,378,004		$	1,737,929		$	1,516,194
Property and maintenance expense		(449,461		)	(332,190		)	(304,380		)
Real estate taxes and insurance expense		(293,999		)	(206,723		)	(178,406		)
Property management expense		(84,342		)	(81,902		)	(81,867		)
Total operating expenses		(827,802		)	(620,815		)	(564,653		)
Net operating income		$	1,550,202		$	1,117,114		$	951,541

Subsequent_EventsOther

Subsequent Events/Other	12 Months Ended
	Dec. 31, 2013
Subsequent Events Other [Abstract]	'
Subsequent Events/Other	'
	18	Subsequent Events/Other
	Subsequent Events
	Subsequent to December 31, 2013, the Company:
	•	Acquired one property consisting of 430 apartments units for $143.0 million.
	Other
	During the years ended December 31, 2013, 2012 and 2011, the Company incurred charges of $0.3 million, $7.0 million and $7.7 million, respectively, related to property acquisition costs, such as survey, title and legal fees, on the acquisition of operating properties (excluding the Archstone Transaction) and $5.2 million, $9.0 million and $5.1 million, respectively, related to the write-off of various pursuit and out-of-pocket costs for terminated acquisition, disposition and development transactions. These costs, totaling $5.5 million, $16.0 million and $12.8 million, respectively, are included in other expenses in the accompanying consolidated statements of operations and comprehensive income. See Note 4 for details on the property acquisition costs related to the Archstone Transaction.
	During the year ended December 31, 2012, the Company settled a dispute with the owners of a land parcel for $4.2 million, which is included in other expenses in the accompanying consolidated statements of operations and comprehensive income.
	In June 2012, the Company received $150.0 million in Archstone-related termination fees subject to certain contingencies. Consistent with the resolution of these contingencies, the Company recognized $70.0 million of these fees as interest and other income in July 2012 and recognized the remaining $80.0 million as interest and other income in October 2012.
	During the year ended December 31, 2013, the Company sold a technology investment it had previously written off, receiving proceeds of $2.1 million that were recorded as a realized gain on sale. During the year ended December 31, 2011, the Company received $4.5 million for the termination of its royalty participation in LRO/Rainmaker, a revenue management system. In addition, during 2011, the Company received $0.8 million for the settlement of various litigation/insurance claims. All of the above amounts are included in interest and other income in the accompanying consolidated statements of operations and comprehensive income.
	During the year ended December 31, 2011, the Company disposed of its corporate housing business for a sales price of approximately $4.0 million, of which the Company provided $2.0 million of seller financing to the buyer. At the time of sale, the full amount of the seller financing was reserved against and the related gain was deferred. During the year ended December 31, 2013, the Company collected $1.5 million, which represented its final reimbursement of the $2.0 million of seller financing. During the years ended December 31, 2012 and 2011, the Company collected $0.3 million and $0.2 million, respectively, on the note receivable. The Company has recognized a cumulative net gain on the sale of approximately $2.9 million.

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data [Abstract]	'
Quarterly Financial Data (Unaudited)	'
	19	Quarterly Financial Data (Unaudited)
	Equity Residential
	The following unaudited quarterly data has been prepared on the basis of a December 31 year-end. All amounts have also been restated in accordance with the guidance on discontinued operations and reflect dispositions and/or properties held for sale through December 31, 2013. Amounts are in thousands, except for per share amounts.
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2013		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues (1)		$	504,722		$	617,217		$	626,629		$	639,134
	Operating income (1)		104,246			63,977			120,396			223,669
	(Loss) income from continuing operations (1)		(165,339		)	(58,511		)	(13,465		)	69,141
	Discontinued operations, net (1)		1,226,373			395,243			405,182			46,729
	Net income *		1,061,034			336,732			391,717			115,870
	Net income available to Common Shares		1,016,650			323,723			376,155			109,940
	Earnings per share – basic:
	Net income available to Common Shares		$	3.01		$	0.9		$	1.05		$	0.31
	Weighted average Common Shares outstanding		337,532			359,653			359,811			359,919
	Earnings per share – diluted:
	Net income available to Common Shares		$	3.01		$	0.9		$	1.05		$	0.3
	Weighted average Common Shares outstanding		337,532			359,653			359,811			375,860
	-1	The amounts presented for the first three quarters of 2013 are not equal to the same amounts previously reported in the respective Form 10-Q’s filed with the SEC for each period as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013. Below is a reconciliation to the amounts previously reported:
			First			Second			Third
			Quarter			Quarter			Quarter
	2013		31-Mar			30-Jun			30-Sep
	Total revenues previously reported in Form 10-Q		$	539,162		$	635,078		$	629,446
	Total revenues subsequently reclassified to discontinued operations		(34,440		)	(17,861		)	(2,817		)
	Total revenues disclosed in Form 10-K		$	504,722		$	617,217		$	626,629
	Operating income previously reported in Form 10-Q		$	117,529		$	71,033		$	121,394
	Operating income subsequently reclassified to discontinued operations		(13,283		)	(7,056		)	(998		)
	Operating income disclosed in Form 10-K		$	104,246		$	63,977		$	120,396
	(Loss) from continuing operations previously reported in Form 10-Q		$	(153,352	)	$	(51,455	)	$	(12,467	)
	(Loss) from continuing operations subsequently reclassified to discontinued		(11,987		)	(7,056		)	(998		)
	operations
	(Loss) from continuing operations disclosed in Form 10-K		$	(165,339	)	$	(58,511	)	$	(13,465	)
	Discontinued operations, net previously reported in Form 10-Q		$	1,214,386		$	388,187		$	404,184
	Discontinued operations, net from properties sold subsequent to the respective		11,987			7,056			998
	reporting period
	Discontinued operations, net disclosed in Form 10-K		$	1,226,373		$	395,243		$	405,182
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2012		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues (2)		$	414,037		$	431,910		$	449,072		$	452,483
	Operating income (2)		102,110			121,745			142,020			148,247
	(Loss) income from continuing operations (2)		(25,394		)	(6,340		)	91,269			100,763
	Discontinued operations, net (2)		177,561			114,655			145,054			283,636
	Net income *		152,167			108,315			236,323			384,399
	Net income available to Common Shares		141,833			99,797			218,603			365,979
	Earnings per share – basic:
	Net income available to Common Shares		$	0.47		$	0.33		$	0.73		$	1.18
	Weighted average Common Shares outstanding		298,805			300,193			301,336			310,398
	Earnings per share – diluted:
	Net income available to Common Shares		$	0.47		$	0.33		$	0.72		$	1.17
	Weighted average Common Shares outstanding		298,805			300,193			318,773			327,108
	-2	The amounts presented for the four quarters of 2012 are not equal to the same amounts previously reported in the Form 8-K filed with the SEC on June 17, 2013 (for the first and fourth quarters of 2012), the second quarter 2013 Form 10-Q filed with the SEC on August 8, 2013 (for the second quarter of 2012) and the third quarter 2013 Form 10-Q filed with the SEC on November 7, 2013 (for the third quarter of 2012) as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013. Below is a reconciliation to the amounts previously reported:
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2012		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues previously reported in June 2013 Form 8-K/Form 10-Q		$	446,448		$	448,351		$	451,699		$	485,868
	Total revenues subsequently reclassified to discontinued operations		(32,411		)	(16,441		)	(2,627		)	(33,385		)
	Total revenues disclosed in Form 10-K		$	414,037		$	431,910		$	449,072		$	452,483
	Operating income previously reported in June 2013 Form 8-K/Form		$	114,476		$	128,560		$	142,932		$	162,109
	10-Q
	Operating income subsequently reclassified to discontinued		(12,366		)	(6,815		)	(912		)	(13,862		)
	operations
	Operating income disclosed in Form 10-K		$	102,110		$	121,745		$	142,020		$	148,247
(Loss) income from continuing operations previously reported in		$	(13,426	)	$	474		$	92,181		$	114,239
June 2013 Form 8-K/Form 10-Q
Income from continuing operations subsequently reclassified to		(11,968		)	(6,814		)	(912		)	(13,476		)
discontinued operations
(Loss) income from continuing operations disclosed in Form 10-K		$	(25,394	)	$	(6,340	)	$	91,269		$	100,763
Discontinued operations, net previously reported in June 2013		$	165,593		$	107,841		$	144,142		$	270,160
Form 8-K/Form 10-Q
Discontinued operations, net from properties sold subsequent to the		11,968			6,814			912			13,476
respective reporting period
Discontinued operations, net disclosed in Form 10-K		$	177,561		$	114,655		$	145,054		$	283,636
* The Company did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2013 and 2012. Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.
ERP Operating Limited Partnership
The following unaudited quarterly data has been prepared on the basis of a December 31 year-end. All amounts have also been restated in accordance with the guidance on discontinued operations and reflect dispositions and/or properties held for sale through December 31, 2013. Amounts are in thousands, except for per Unit amounts.
		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
2013		31-Mar			30-Jun			30-Sep			31-Dec
Total revenues (1)		$	504,722		$	617,217		$	626,629		$	639,134
Operating income (1)		104,246			63,977			120,396			223,669
(Loss) income from continuing operations (1)		(165,339		)	(58,511		)	(13,465		)	69,141
Discontinued operations, net (1)		1,226,373			395,243			405,182			46,729
Net income *		1,061,034			336,732			391,717			115,870
Net income available to Units		1,059,973			336,511			390,991			114,271
Earnings per Unit – basic:
Net income available to Units		$	3.01		$	0.9		$	1.05		$	0.31
Weighted average Units outstanding		351,255			373,403			373,547			373,643
Earnings per Unit – diluted:
Net income available to Units		$	3.01		$	0.9		$	1.05		$	0.3
Weighted average Units outstanding		351,255			373,403			373,547			375,860
-1	The amounts presented for the first three quarters of 2013 are not equal to the same amounts previously reported in the respective Form 10-Q’s filed with the SEC for each period as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013. Below is a reconciliation to the amounts previously reported:
		First			Second			Third
		Quarter			Quarter			Quarter
2013		31-Mar			30-Jun			30-Sep
Total revenues previously reported in Form 10-Q		$	539,162		$	635,078		$	629,446
Total revenues subsequently reclassified to discontinued operations		(34,440		)	(17,861		)	(2,817		)
Total revenues disclosed in Form 10-K		$	504,722		$	617,217		$	626,629
Operating income previously reported in Form 10-Q		$	117,529		$	71,033		$	121,394
Operating income subsequently reclassified to discontinued operations		(13,283		)	(7,056		)	(998		)
Operating income disclosed in Form 10-K		$	104,246		$	63,977		$	120,396
(Loss) from continuing operations previously reported in Form 10-Q		$	(153,352	)	$	(51,455	)	$	(12,467	)
(Loss) from continuing operations subsequently reclassified to discontinued		(11,987		)	(7,056		)	(998		)
operations
(Loss) from continuing operations disclosed in Form 10-K		$	(165,339	)	$	(58,511	)	$	(13,465	)
Discontinued operations, net previously reported in Form 10-Q		$	1,214,386		$	388,187		$	404,184
Discontinued operations, net from properties sold subsequent to the respective		11,987			7,056			998
reporting period
Discontinued operations, net disclosed in Form 10-K		$	1,226,373		$	395,243		$	405,182
		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
2012		31-Mar			30-Jun			30-Sep			31-Dec
Total revenues (2)		$	414,037		$	431,910		$	449,072		$	452,483
Operating income (2)		102,110			121,745			142,020			148,247
(Loss) income from continuing operations (2)		(25,394		)	(6,340		)	91,269			100,763
Discontinued operations, net (2)		177,561			114,655			145,054			283,636
Net income *		152,167			108,315			236,323			384,399
Net income available to Units		148,251			104,529			229,099			382,974
Earnings per Unit – basic:
Net income available to Units		$	0.47		$	0.33		$	0.73		$	1.18
Weighted average Units outstanding		312,011			314,255			315,513			324,364
Earnings per Unit – diluted:
Net income available to Units		$	0.47		$	0.33		$	0.72		$	1.17
Weighted average Units outstanding		312,011			314,255			318,773			327,108
-2	The amounts presented for the four quarters of 2012 are not equal to the same amounts previously reported in the Form 8-K filed with the SEC on June 17, 2013 (for the first and fourth quarters of 2012), the second quarter 2013 Form 10-Q filed with the SEC on August 8, 2013 (for the second quarter of 2012) and the third quarter 2013 Form 10-Q filed with the SEC on November 7, 2013 (for the third quarter of 2012) as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013. Below is a reconciliation to the amounts previously reported:
		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
2012		31-Mar			30-Jun			30-Sep			31-Dec
Total revenues previously reported in June 2013 Form 8-K/Form		$	446,448		$	448,351		$	451,699		$	485,868
10-Q
Total revenues subsequently reclassified to discontinued operations		(32,411		)	(16,441		)	(2,627		)	(33,385		)
Total revenues disclosed in Form 10-K		$	414,037		$	431,910		$	449,072		$	452,483
Operating income previously reported in June 2013 Form 8-K/Form		$	114,476		$	128,560		$	142,932		$	162,109
10-Q
Operating income subsequently reclassified to discontinued		(12,366		)	(6,815		)	(912		)	(13,862		)
operations
Operating income disclosed in Form 10-K		$	102,110		$	121,745		$	142,020		$	148,247
(Loss) income from continuing operations previously reported in		$	(13,426	)	$	474		$	92,181		$	114,239
June 2013 Form 8-K/Form 10-Q
Income from continuing operations subsequently reclassified to		(11,968		)	(6,814		)	(912		)	(13,476		)
discontinued operations
(Loss) income from continuing operations disclosed in Form 10-K		$	(25,394	)	$	(6,340	)	$	91,269		$	100,763
Discontinued operations, net previously reported in June 2013 Form		$	165,593		$	107,841		$	144,142		$	270,160
8-K/Form 10-Q
Discontinued operations, net from properties sold subsequent to the		11,968			6,814			912			13,476
respective reporting period
Discontinued operations, net disclosed in Form 10-K		$	177,561		$	114,655		$	145,054		$	283,636
* The Operating Partnership did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2013 and 2012. Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.

Real_Estate_and_Accumulated_De

Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2013
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]	'
Real Estate and Accumulated Depreciation	'
	EQUITY RESIDENTIAL
	ERP OPERATING LIMITED PARTNERSHIP
	Schedule III - Real Estate and Accumulated Depreciation
	Overall Summary
	December 31, 2013
		Properties (H)			Units (H)			Investment in Real Estate, Gross				Accumulated				Investment in Real Estate, Net				Encumbrances
												Depreciation
	Wholly Owned Unencumbered	253			67,220			$	17,386,901,834			$	(3,177,396,618	)		$	14,209,505,216			$	—
	Wholly Owned Encumbered	112			32,101			8,397,867,526				(1,457,510,357		)		6,940,357,169				2,703,534,549
	Portfolio/Entity Encumbrances (1)	—			—			—				—				—				2,135,958,561
	Wholly Owned Properties	365			99,321			25,784,769,360				(4,634,906,975		)		21,149,862,385				4,839,493,110
	Partially Owned Unencumbered	8			1,505			573,312,560				(69,955,775		)		503,356,785				—
	Partially Owned Encumbered	11			2,247			442,866,480				(102,846,572		)		340,019,908				334,672,310
	Partially Owned Properties	19			3,752			1,016,179,040				(172,802,347		)		843,376,693				334,672,310
	Total Unencumbered Properties	261			68,725			17,960,214,394				(3,247,352,393		)		14,712,862,001				—
	Total Encumbered Properties	123			34,348			8,840,734,006				(1,560,356,929		)		7,280,377,077				5,174,165,420
	Total Consolidated Investment in Real Estate	384			103,073			$	26,800,948,400			$	(4,807,709,322	)		$	21,993,239,078			$	5,174,165,420
	-1	See attached Encumbrances Reconciliation.
	EQUITY RESIDENTIAL
	ERP OPERATING LIMITED PARTNERSHIP
	Schedule III - Real Estate and Accumulated Depreciation
	Encumbrances Reconciliation
	December 31, 2013
	Portfolio/Entity Encumbrances		Number of		See Properties With Note:		Amount
			Properties Encumbered by
	EQR-Fanwell 2007 LP		6		I		$	300,000,000
	EQR-Wellfan 2008 LP (R)		14		J		550,000,000
	ASN-Fannie Mae 3		5		K		485,958,561
	Archstone Master Property Holdings LLC		13		L		800,000,000
	Portfolio/Entity Encumbrances		38				2,135,958,561
	Individual Property Encumbrances						3,038,206,859
	Total Encumbrances per Financial Statements						$	5,174,165,420
	EQUITY RESIDENTIAL
	ERP OPERATING LIMITED PARTNERSHIP
	Schedule III – Real Estate and Accumulated Depreciation
	(Amounts in thousands)
	The changes in total real estate for the years ended December 31, 2013, 2012 and 2011 are as follows:
		2013				2012				2011
	Balance, beginning of year	$	21,008,429			$	20,407,946			$	19,702,371
	Acquisitions and development	9,273,492				1,250,633				1,721,895
	Improvements	139,950				161,460				151,476
	Dispositions and other	(3,620,923		)		(811,610		)		(1,167,796		)
	Balance, end of year	$	26,800,948			$	21,008,429			$	20,407,946
	The changes in accumulated depreciation for the years ended December 31, 2013, 2012 and 2011 are as follows:
		2013				2012				2011
	Balance, beginning of year	$	4,912,221			$	4,539,583			$	4,337,357
	Depreciation	1,013,353				684,992				663,616
	Dispositions and other	(1,117,865		)		(312,354		)		(461,390		)
	Balance, end of year	$	4,807,709			$	4,912,221			$	4,539,583
	EQUITY RESIDENTIAL
	ERP OPERATING LIMITED PARTNERSHIP
	Schedule III - Real Estate and Accumulated Depreciation
	December 31, 2013
	Description								Initial Cost to Company								Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)				Gross Amount Carried at Close of Period 12/31/13
	Apartment Name	Location		Date of Construction		Units (H)			Land				Building & Fixtures				Building & Fixtures				Land			Building & Fixtures (A)				Total (B)		Accumulated Depreciation (C)			Investment in Real Estate, Net at 12/31/13 (B)			Encumbrances
	Wholly Owned Unencumbered:
	100 K Street	Washington, D.C.		(F)		—			$	15,600,000			$	912,267			$	—			$	15,600,000		$	912,267			$	16,512,267	$	—			$	16,512,267	$	—
	1111 Belle Pre (fka The Madison)	Alexandria, VA (G)		(F)		—			18,937,702				83,371,939				—				18,937,702			83,371,939				102,309,641		—				102,309,641		—
	1210 Mass	Washington, D.C. (G)		2004		144			9,213,512				36,559,189				403,220				9,213,512			36,962,409				46,175,921		(11,445,278		)		34,730,643		—
	1500 Mass Ave	Washington, D.C. (G)		1951		556			54,638,298				40,361,702				12,040,625				54,638,298			52,402,327				107,040,625		(11,057,165		)		95,983,460		—
	170 Amsterdam	New York, NY		(F)		—			—				44,799,315				—				—			44,799,315				44,799,315		—				44,799,315		—
	175 Kent	Brooklyn, NY (G)		2011		113			22,037,831				53,962,169				755,257				22,037,831			54,717,426				76,755,257		(6,257,548		)		70,497,709		—
	200 N Lemon Street	Anaheim, CA		(F)		—			5,865,235				1,823,393				—				5,865,235			1,823,393				7,688,628		—				7,688,628		—
204-206 Pine Street/1610 2nd Avenue	Seattle, WA		(F)		—			22,106,464				4,717,126				—				22,106,464			4,717,126				26,823,590		—				26,823,590		—
2201 Pershing Drive	Arlington, VA (G)		2012		188			11,321,198				49,615,688				338,120				11,321,198			49,953,808				61,275,006		(2,490,905		)		58,784,101		—
2201 Wilson	Arlington, VA (G)		2000		219			21,900,000				79,242,161				490,601				21,900,000			79,732,762				101,632,762		(5,494,624		)		96,138,138		—
2400 M St	Washington, D.C. (G)		2006		359			30,006,593				114,013,785				1,705,104				30,006,593			115,718,889				145,725,482		(33,461,838		)		112,263,644		—
420 East 80th Street	New York, NY		1961		155			39,277,000				23,026,984				3,504,909				39,277,000			26,531,893				65,808,893		(9,519,405		)		56,289,488		—
425 Mass	Washington, D.C. (G)		2009		559			28,150,000				138,600,000				2,871,585				28,150,000			141,471,585				169,621,585		(23,372,279		)		146,249,306		—
600 Washington	New York, NY (G)		2004		135			32,852,000				43,140,551				286,906				32,852,000			43,427,457				76,279,457		(13,659,850		)		62,619,607		—
70 Greene	Jersey City, NJ (G)		2010		480			28,108,899				236,965,215				471,854				28,108,899			237,437,069				265,545,968		(33,100,960		)		232,445,008		—
71 Broadway	New York, NY (G)		1997		238			22,611,600				77,492,171				10,684,866				22,611,600			88,177,037				110,788,637		(28,276,895		)		82,511,742		—
77 Bluxome	San Francisco, CA		2007		102			5,249,124				18,609,876				81,627				5,249,124			18,691,503				23,940,627		(1,887,319		)		22,053,308		—
777 Sixth	New York, NY (G)		2002		294			65,352,706				65,747,294				1,095,560				65,352,706			66,842,854				132,195,560		(16,931,741		)		115,263,819		—
801 Brannan	San Francisco, CA		(F)		—			42,367,171				3,280,863				—				42,367,171			3,280,863				45,648,034		—				45,648,034		—
88 Hillside	Daly City, CA (G)		2011		95			7,786,800				31,587,325				1,295,347				7,786,800			32,882,672				40,669,472		(3,123,822		)		37,545,650		—
Abington Glen	Abington, MA		1968		90			553,105				3,697,396				2,493,689				553,105			6,191,085				6,744,190		(3,841,681		)		2,902,509		—
Agoura Hills	Agoura Hills, CA		1985		178			16,700,000				30,344,413				118,825				16,700,000			30,463,238				47,163,238		(2,804,190		)		44,359,048		—
Alban Towers	Washington, D.C.		1934		229			18,900,000				90,351,467				116,906				18,900,000			90,468,373				109,368,373		(6,685,386		)		102,682,987		—
Arbor Terrace	Sunnyvale, CA		1979		175			9,057,300				18,483,642				2,487,094				9,057,300			20,970,736				30,028,036		(11,579,687		)		18,448,349		—
Arboretum (MA)	Canton, MA		1989		156			4,685,900				10,992,751				2,600,866				4,685,900			13,593,617				18,279,517		(7,595,468		)		10,684,049		—
Arden Villas	Orlando, FL		1999		336			5,500,000				28,600,796				3,810,685				5,500,000			32,411,481				37,911,481		(11,965,280		)		25,946,201		—
Artisan on Second	Los Angeles, CA		2008		118			8,000,400				36,074,600				168,636				8,000,400			36,243,236				44,243,636		(4,986,340		)		39,257,296		—
Ashton, The	Corona Hills, CA		1986		492			2,594,264				33,042,398				6,733,646				2,594,264			39,776,044				42,370,308		(23,448,187		)		18,922,121		—
Auvers Village	Orlando, FL		1991		480			3,808,823				29,322,243				7,105,642				3,808,823			36,427,885				40,236,708		(20,581,844		)		19,654,864		—
Avenue Two	Redwood City, CA		1972		123			7,995,000				18,005,000				956,348				7,995,000			18,961,348				26,956,348		(2,387,293		)		24,569,055		—
Azure (fka Mission Bay-Block 13)	San Francisco, CA		(F)		—			32,855,115				33,412,715				—				32,855,115			33,412,715				66,267,830		—				66,267,830		—
Ball Park Lofts	Denver, CO (G)		2003		354			5,481,556				51,658,741				4,340,240				5,481,556			55,998,981				61,480,537		(19,343,578		)		42,136,959		—
Barrington Place	Oviedo, FL		1998		233			6,990,000				15,740,825				2,889,445				6,990,000			18,630,270				25,620,270		(8,520,785		)		17,099,485		—
Bay Hill	Long Beach, CA		2002		160			7,600,000				27,437,239				913,982				7,600,000			28,351,221				35,951,221		(10,003,163		)		25,948,058		—
Beatrice, The	New York, NY		2010		302			114,351,405				165,648,595				124,512				114,351,405			165,773,107				280,124,512		(17,146,544		)		262,977,968		—
Bella Terra I	Mukilteo, WA (G)		2002		235			5,686,861				26,070,540				942,474				5,686,861			27,013,014				32,699,875		(10,029,556		)		22,670,319		—
Belle Arts Condominium Homes, LLC	Bellevue, WA		2000		1			63,158				248,929				(5,320		)		63,158			243,609				306,767		—				306,767		—
Belle Fontaine	Marina Del Ray, CA		2003		102			9,098,808				28,701,192				162,958				9,098,808			28,864,150				37,962,958		(3,227,931		)		34,735,027		—
Bellevue	Bellevue, WA (G)		1998		191			15,100,000				42,169,280				761,135				15,100,000			42,930,415				58,030,415		(2,840,690		)		55,189,725		—
Berkeley Land	Berkeley, CA		(F)		—			13,908,910				5,082,581				—				13,908,910			5,082,581				18,991,491		—				18,991,491		—
Boston Common	Boston, MA (G)		2006		420			106,100,000				167,711,384				190,386				106,100,000			167,901,770				274,001,770		(13,060,243		)		260,941,527		—
Bradford Apartments	Newington, CT		1964		64			401,091				2,681,210				813,895				401,091			3,495,105				3,896,196		(1,738,035		)		2,158,161		—
Briar Knoll Apts	Vernon, CT		1986		150			928,972				6,209,988				1,655,316				928,972			7,865,304				8,794,276		(4,017,041		)		4,777,235		—
Briarwood (CA)	Sunnyvale, CA		1985		192			9,991,500				22,247,278				2,873,885				9,991,500			25,121,163				35,112,663		(12,928,298		)		22,184,365		—
Bridford Lakes II	Greensboro, NC		(F)		—			1,100,564				792,508				—				1,100,564			792,508				1,893,072		—				1,893,072		—
Brooklyn Heights	Brooklyn, NY (G)		2000		193			32,400,000				93,317,261				79,289				32,400,000			93,396,550				125,796,550		(6,989,848		)		118,806,702		—
Brooklyner (fka 111 Lawrence)	Brooklyn, NY (G)		2010		490			40,099,922				221,435,831				375,977				40,099,922			221,811,808				261,911,730		(23,147,254		)		238,764,476		—
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
Brookside (CO)	Boulder, CO		1993		144			3,600,400			10,211,159			2,563,906			3,600,400			12,775,065		16,375,465			(6,711,041	)		9,664,424	—
Cambridge Park	Cambridge, MA (G)		2002		312			31,200,000			106,752,364			739,806			31,200,000			107,492,170		138,692,170			(7,705,656	)		130,986,514	—
Carlyle Mill	Alexandria, VA		2002		317			10,000,000			51,367,913			4,358,788			10,000,000			55,726,701		65,726,701			(21,654,122	)		44,072,579	—
Cascade	Seattle, WA		(F)		—			12,198,278			4,063,175			—			12,198,278			4,063,175		16,261,453			—			16,261,453	—
Cascade II	Seattle, WA		(F)		—			11,553,286			2,711,440			—			11,553,286			2,711,440		14,264,726			—			14,264,726	—
Centennial (fka Centennial Court & Centennial Tower)	Seattle, WA (G)		1991/2001		408			9,700,000			70,080,378			5,479,205			9,700,000			75,559,583		85,259,583			(24,644,073	)		60,615,510	—
Centre Club	Ontario, CA		1994		312			5,616,000			23,485,891			3,045,795			5,616,000			26,531,686		32,147,686			(12,919,164	)		19,228,522	—
Centre Club II	Ontario, CA		2002		100			1,820,000			9,528,898			689,904			1,820,000			10,218,802		12,038,802			(4,327,441	)		7,711,361	—
Cierra Crest	Denver, CO		1996		480			4,803,100			34,894,898			5,106,249			4,803,100			40,001,147		44,804,247			(22,917,727	)		21,886,520	—
Cleo, The	Los Angeles, CA		1989		92			6,615,467			14,829,335			3,750,349			6,615,467			18,579,684		25,195,151			(6,566,783	)		18,628,368	—
Coconut Palm Club	Coconut Creek, FL		1992		301			3,001,700			17,678,928			3,775,228			3,001,700			21,454,156		24,455,856			(11,971,663	)		12,484,193	—
Courthouse Plaza	Arlington, VA (G)		1990		396			—			87,821,045			1,017,095			—			88,838,140		88,838,140			(7,919,119	)		80,919,021	—
Cove at Boynton Beach I	Boynton Beach, FL		1996		252			12,600,000			31,469,651			4,284,433			12,600,000			35,754,084		48,354,084			(13,936,676	)		34,417,408	—
Cove at Boynton Beach II	Boynton Beach, FL		1998		296			14,800,000			37,874,719			—			14,800,000			37,874,719		52,674,719			(13,512,371	)		39,162,348	—
Creekside (San Mateo)	San Mateo, CA		1985		192			9,606,600			21,193,232			3,381,227			9,606,600			24,574,459		34,181,059			(12,799,939	)		21,381,120	—
Cronins Landing	Waltham, MA (G)		1998		281			32,300,000			85,723,236			203,018			32,300,000			85,926,254		118,226,254			(6,736,216	)		111,490,038	—
Crowntree Lakes	Orlando, FL		2008		352			12,009,630			44,407,977			394,460			12,009,630			44,802,437		56,812,067			(10,871,421	)		45,940,646	—
Crystal Place	Arlington, VA		1986		181			17,200,000			48,253,858			132,258			17,200,000			48,386,116		65,586,116			(3,700,423	)		61,885,693	—
Cupertino	Cupertino, CA		1998		311			40,400,000			96,638,206			128,241			40,400,000			96,766,447		137,166,447			(7,012,730	)		130,153,717	—
Cypress Lake at Waterford	Orlando, FL		2001		316			7,000,000			27,654,816			2,156,145			7,000,000			29,810,961		36,810,961			(11,172,993	)		25,637,968	—
Dartmouth Woods	Lakewood, CO		1990		201			1,609,800			10,832,754			2,301,254			1,609,800			13,134,008		14,743,808			(7,965,913	)		6,777,895	—
Dean Estates	Taunton, MA		1984		58			498,080			3,329,560			759,777			498,080			4,089,337		4,587,417			(2,124,869	)		2,462,548	—
Deerwood (Corona)	Corona, CA		1992		316			4,742,200			20,272,892			4,232,556			4,742,200			24,505,448		29,247,648			(14,569,786	)		14,677,862	—
Del Mar Heights	San Diego, CA		1986		168			15,100,000			41,147,185			141,192			15,100,000			41,288,377		56,388,377			(3,080,440	)		53,307,937	—
DuPont Circle	Washington, D.C. (G)		1961		120			13,500,000			27,120,388			244,693			13,500,000			27,365,081		40,865,081			(2,700,714	)		38,164,367	—
Eagle Canyon	Chino Hills, CA		1985		252			1,808,900			16,274,361			7,191,652			1,808,900			23,466,013		25,274,913			(14,038,267	)		11,236,646	—
Edgemont at Bethesda Metro	Bethesda, MD		1989		122			13,092,552			43,907,448			261,029			13,092,552			44,168,477		57,261,029			(5,082,748	)		52,178,281	—
Emerald Park	Dublin, CA		2000		324			25,900,000			84,551,331			128,390			25,900,000			84,679,721		110,579,721			(6,337,254	)		104,242,467	—
Emerson Place	Boston, MA (G)		1962		444			14,855,000			57,566,636			16,265,605			14,855,000			73,832,241		88,687,241			(44,668,129	)		44,019,112	—
Emeryville	Emeryville, CA		1994		261			12,300,000			61,845,626			419,601			12,300,000			62,265,227		74,565,227			(4,686,215	)		69,879,012	—
Encinitas	Encinitas, CA (G)		2002		120			12,000,000			29,419,415			82,422			12,000,000			29,501,837		41,501,837			(2,385,500	)		39,116,337	—
Enclave at Waterways	Deerfield Beach, FL		1998		300			15,000,000			33,194,576			1,855,969			15,000,000			35,050,545		50,050,545			(12,392,429	)		37,658,116	—
Enclave at Winston Park	Coconut Creek, FL		1995		278			5,560,000			19,939,324			4,248,969			5,560,000			24,188,293		29,748,293			(10,417,597	)		19,330,696	—
Encore at Sherman Oaks, The	Sherman Oaks, CA		1988		174			8,700,000			25,446,003			684,532			8,700,000			26,130,535		34,830,535			(3,889,921	)		30,940,614	—
Estates at Wellington Green	Wellington, FL		2003		400			20,000,000			64,790,850			2,259,739			20,000,000			67,050,589		87,050,589			(22,638,702	)		64,411,887	—
Eye Street	Washington, D.C.		(F)		—			11,771,446			6,095,393			—			11,771,446			6,095,393		17,866,839			—			17,866,839	—
Fox Hill Apartments	Enfield, CT		1974		168			1,129,018			7,547,256			1,859,467			1,129,018			9,406,723		10,535,741			(4,655,719	)		5,880,022	—
Fremont Center	Fremont, CA (G)		2002		322			25,800,000			79,290,493			240,019			25,800,000			79,530,512		105,330,512			(5,413,886	)		99,916,626	—
Gables Grand Plaza	Coral Gables, FL (G)		1998		195			—			44,601,000			7,018,667			—			51,619,667		51,619,667			(18,748,222	)		32,871,445	—
Gallery, The	Hermosa Beach, CA		1971		169			18,144,000			46,567,941			2,098,129			18,144,000			48,666,070		66,810,070			(14,889,140	)		51,920,930	—
Gatehouse at Pine Lake	Pembroke Pines, FL		1990		296			1,896,600			17,070,795			6,124,047			1,896,600			23,194,842		25,091,442			(13,330,823	)		11,760,619	—
Gatehouse on the Green	Plantation, FL		1990		312			2,228,200			20,056,270			7,677,923			2,228,200			27,734,193		29,962,393			(16,357,389	)		13,605,004	—
Gates of Redmond	Redmond, WA		1979		180			2,306,100			12,064,015			4,903,326			2,306,100			16,967,341		19,273,441			(9,870,573	)		9,402,868	—
Geary Court Yard	San Francisco, CA		1990		164			1,722,400			15,471,429			2,672,731			1,722,400			18,144,160		19,866,560			(10,311,127	)		9,555,433	—
Glen Meadow	Franklin, MA		1971		288			2,339,330			16,133,588			3,870,079			2,339,330			20,003,667		22,342,997			(10,599,550	)		11,743,447	—
Glendale	Glendale, CA		1988		264			—			68,325,277			267,514			—			68,592,791		68,592,791			(4,938,308	)		63,654,483	—
Governors Green	Bowie, MD		1999		478			19,845,000			73,335,916			1,157,259			19,845,000			74,493,175		94,338,175			(20,664,462	)		73,673,713	—
Greenfield Village	Rocky Hill , CT		1965		151			911,534			6,093,418			723,069			911,534			6,816,487		7,728,021			(3,383,217	)		4,344,804	—
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
Greenwood Park	Centennial, CO		1994		291			4,365,000			38,372,440			1,900,765			4,365,000			40,273,205		44,638,205			(11,821,792	)		32,816,413	—
Greenwood Plaza	Centennial, CO		1996		266			3,990,000			35,846,708			2,296,465			3,990,000			38,143,173		42,133,173			(11,411,269	)		30,721,904	—
Hacienda	Pleasanton, CA		2000		540			43,200,000			129,637,659			203,048			43,200,000			129,840,707		173,040,707			(10,178,767	)		162,861,940	—
Hamilton Villas	Beverly Hills, CA		1990		35			7,772,000			16,864,269			1,372,560			7,772,000			18,236,829		26,008,829			(4,434,046	)		21,574,783	—
Hammocks Place	Miami, FL		1986		296			319,180			12,513,467			4,353,249			319,180			16,866,716		17,185,896			(11,895,336	)		5,290,560	—
Hampshire Place	Los Angeles, CA		1989		259			10,806,000			30,335,330			3,107,298			10,806,000			33,442,628		44,248,628			(11,716,751	)		32,531,877	—
Harbor Steps	Seattle, WA (G)		2000		758			59,390,179			158,829,432			12,492,799			59,390,179			171,322,231		230,712,410			(53,500,328	)		177,212,082	—
Heritage Ridge	Lynwood, WA		1999		197			6,895,000			18,983,597			750,513			6,895,000			19,734,110		26,629,110			(7,407,674	)		19,221,436	—
Heron Pointe	Boynton Beach, FL		1989		192			1,546,700			7,774,676			2,385,724			1,546,700			10,160,400		11,707,100			(6,263,951	)		5,443,149	—
High Meadow	Ellington, CT		1975		100			583,679			3,901,774			1,148,051			583,679			5,049,825		5,633,504			(2,437,167	)		3,196,337	—
Highland Glen	Westwood, MA		1979		180			2,229,095			16,828,153			2,709,281			2,229,095			19,537,434		21,766,529			(9,457,763	)		12,308,766	—
Highland Glen II	Westwood, MA		2007		102			—			19,875,857			144,851			—			20,020,708		20,020,708			(5,078,255	)		14,942,453	—
Highlands at Cherry Hill	Cherry Hills, NJ		2002		170			6,800,000			21,459,108			804,080			6,800,000			22,263,188		29,063,188			(7,214,459	)		21,848,729	—
Highlands at South Plainfield	South Plainfield, NJ		2000		252			10,080,000			37,526,912			929,736			10,080,000			38,456,648		48,536,648			(11,862,100	)		36,674,548	—
Hikari	Los Angeles, CA (G)		2007		128			9,435,760			32,564,240			153,706			9,435,760			32,717,946		42,153,706			(4,101,964	)		38,051,742	—
Hudson Crossing	New York, NY (G)		2003		259			23,420,000			69,977,699			1,630,936			23,420,000			71,608,635		95,028,635			(23,456,649	)		71,571,986	—
Hudson Pointe	Jersey City, NJ		2003		182			5,350,000			41,114,074			2,100,163			5,350,000			43,214,237		48,564,237			(15,065,373	)		33,498,864	—
Hunt Club II	Charlotte, NC		(F)		—			100,000			—			—			100,000			—		100,000			—			100,000	—
Huntington Park	Everett, WA		1991		381			1,597,500			14,367,864			4,786,996			1,597,500			19,154,860		20,752,360			(13,271,353	)		7,481,007	—
Jia (fka Chinatown Gateway)	Los Angeles, CA (G)		(F)		—			14,791,831			71,969,127			—			14,791,831			71,969,127		86,760,958			—			86,760,958	—
Kendall Square	Cambridge, MA		1998		186			23,300,000			78,968,911			579,275			23,300,000			79,548,186		102,848,186			(5,491,559	)		97,356,627	—
Kenwood Mews	Burbank, CA		1991		141			14,100,000			24,662,883			2,620,056			14,100,000			27,282,939		41,382,939			(8,366,151	)		33,016,788	—
Kings Colony (FL)	Miami, FL		1986		480			19,200,000			48,379,586			4,274,318			19,200,000			52,653,904		71,853,904			(18,372,874	)		53,481,030	—
Lake Buena Vista Combined	Orlando, FL		2000/2002		672			23,520,000			75,068,206			4,640,640			23,520,000			79,708,846		103,228,846			(25,931,634	)		77,297,212	—
Landings at Pembroke Lakes	Pembroke Pines, FL		1989		358			17,900,000			24,460,989			5,339,378			17,900,000			29,800,367		47,700,367			(11,826,369	)		35,873,998	—
Landings at Port Imperial	W. New York, NJ		1999		276			27,246,045			37,741,050			7,207,921			27,246,045			44,948,971		72,195,016			(21,242,906	)		50,952,110	—
Legacy at Highlands Ranch	Highlands Ranch, CO		1999		422			6,330,000			37,557,013			2,438,295			6,330,000			39,995,308		46,325,308			(14,087,855	)		32,237,453	—
Lincoln Heights	Quincy, MA		1991		336			5,928,400			33,595,262			11,206,707			5,928,400			44,801,969		50,730,369			(25,653,015	)		25,077,354	—
Lofts 590	Arlington, VA		2005		212			20,100,000			68,361,638			44,726			20,100,000			68,406,364		88,506,364			(4,729,574	)		83,776,790	—
Longacre House	New York, NY (G)		2000		293			73,170,045			53,962,510			1,179,807			73,170,045			55,142,317		128,312,362			(14,874,367	)		113,437,995	—
Longfellow Place	Boston, MA (G)		1975		710			53,164,160			185,928,608			77,215,801			53,164,160			263,144,409		316,308,569			(131,267,364	)		185,041,205	—
Mantena	New York, NY (G)		2012		98			22,346,513			61,501,158			168,161			22,346,513			61,669,319		84,015,832			(4,731,391	)		79,284,441	—
Marina Del Rey	Marina Del Rey, CA		1973		623			—			169,967,439			1,355,945			—			171,323,384		171,323,384			(14,625,920	)		156,697,464	—
Marquessa	Corona Hills, CA		1992		336			6,888,500			21,604,584			3,037,350			6,888,500			24,641,934		31,530,434			(14,418,836	)		17,111,598	—
Martine, The	Bellevue, WA		1984		67			3,200,000			9,616,264			2,722,147			3,200,000			12,338,411		15,538,411			(4,098,923	)		11,439,488	—
Milano Lofts	Los Angeles, CA (G)		1925/2006		99			8,125,216			27,378,784			268,483			8,125,216			27,647,267		35,772,483			(2,394,637	)		33,377,846	—
Millikan	Irvine, CA		(F)		—			10,743,027			6,214,141			—			10,743,027			6,214,141		16,957,168			—			16,957,168	—
Mission Verde, LLC	San Jose, CA		1986		108			5,190,700			9,679,109			3,349,695			5,190,700			13,028,804		18,219,504			(7,779,026	)		10,440,478	—
Mosaic at Largo Station	Hyattsville, MD		2008		242			4,120,800			42,477,297			490,649			4,120,800			42,967,946		47,088,746			(9,970,232	)		37,118,514	—
Mountain View	Mountain View, CA		1965		180			27,000,000			33,338,325			164,351			27,000,000			33,502,676		60,502,676			(3,080,868	)		57,421,808	—
Mozaic at Union Station	Los Angeles, CA		2007		272			8,500,000			52,529,446			1,325,352			8,500,000			53,854,798		62,354,798			(14,841,048	)		47,513,750	—
Murray Hill	New York, NY (G)		1974		270			75,800,000			103,623,712			579,164			75,800,000			104,202,876		180,002,876			(10,741,983	)		169,260,893	—
Northglen	Valencia, CA		1988		234			9,360,000			20,778,553			1,969,605			9,360,000			22,748,158		32,108,158			(10,747,805	)		21,360,353	—
Northlake (MD)	Germantown, MD		1985		304			15,000,000			23,142,302			10,244,672			15,000,000			33,386,974		48,386,974			(15,031,335	)		33,355,639	—
Northridge	Pleasant Hill, CA		1974		221			5,527,800			14,691,705			9,851,592			5,527,800			24,543,297		30,071,097			(13,695,958	)		16,375,139	—
Oak Mill I	Germantown, MD		1984		208			10,000,000			13,155,522			7,562,822			10,000,000			20,718,344		30,718,344			(9,644,381	)		21,073,963	—
Oak Park North	Agoura Hills, CA		1990		220			1,706,900			15,362,666			4,040,864			1,706,900			19,403,530		21,110,430			(11,981,703	)		9,128,727	—
Oak Park South	Agoura Hills, CA		1989		224			1,683,800			15,154,608			4,089,342			1,683,800			19,243,950		20,927,750			(11,943,140	)		8,984,610	—
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
Oaks at Falls Church	Falls Church, VA		1966		176			20,240,000			20,152,616			3,779,190			20,240,000			23,931,806		44,171,806			(8,672,588	)		35,499,218	—
Oakwood Boston	Boston, MA (G)		1901		94			22,200,000			28,934,606			102,228			22,200,000			29,036,834		51,236,834			(1,901,519	)		49,335,315	—
Oakwood Crystal City	Arlington, VA		1987		162			15,400,000			35,735,963			63,451			15,400,000			35,799,414		51,199,414			(2,172,022	)		49,027,392	—
Oakwood Marina Del Rey	Marina Del Rey, CA		1969		597			—			121,554,078			597,665			—			122,151,743		122,151,743			(8,733,929	)		113,417,814	—
Oasis at Delray Beach I	Delray Beach, FL		1999		196			5,900,000			25,310,444			298,806			5,900,000			25,609,250		31,509,250			(2,359,051	)		29,150,199	—
Oasis at Delray Beach II	Delray Beach, FL		2013		128			3,840,000			17,490,066			1,190			3,840,000			17,491,256		21,331,256			—			21,331,256	—
Ocean Crest	Solana Beach, CA		1986		146			5,111,200			11,910,438			2,435,992			5,111,200			14,346,430		19,457,630			(8,131,799	)		11,325,831	—
Ocean Walk	Key West, FL		1990		297			2,838,749			25,545,009			3,993,374			2,838,749			29,538,383		32,377,132			(16,842,336	)		15,534,796	—
Olde Redmond Place	Redmond, WA		1986		192			4,807,100			14,126,038			4,373,660			4,807,100			18,499,698		23,306,798			(11,043,147	)		12,263,651	—
One Henry Adams	San Francisco, CA		(F)		—			30,952,393			3,124,964			—			30,952,393			3,124,964		34,077,357			—			34,077,357	—
Orchard Ridge	Lynnwood, WA		1988		104			480,600			4,372,033			1,533,264			480,600			5,905,297		6,385,897			(3,964,230	)		2,421,667	—
Palm Trace Landings	Davie, FL		1995		768			38,400,000			105,693,432			4,031,375			38,400,000			109,724,807		148,124,807			(36,189,802	)		111,935,005	—
Parc 77	New York, NY (G)		1903		137			40,504,000			18,025,679			4,828,502			40,504,000			22,854,181		63,358,181			(8,404,862	)		54,953,319	—
Parc Cameron	New York, NY (G)		1927		166			37,600,000			9,855,597			5,764,055			37,600,000			15,619,652		53,219,652			(7,133,172	)		46,086,480	—
Parc Coliseum	New York, NY (G)		1910		177			52,654,000			23,045,751			7,619,769			52,654,000			30,665,520		83,319,520			(11,481,750	)		71,837,770	—
Parc East Towers	New York, NY (G)		1977		324			102,163,000			108,989,402			6,956,519			102,163,000			115,945,921		218,108,921			(31,853,462	)		186,255,459	—
Park at Turtle Run, The	Coral Springs, FL		2001		257			15,420,000			36,064,629			1,229,572			15,420,000			37,294,201		52,714,201			(13,204,540	)		39,509,661	—
Park Connecticut	Washington, D.C.		2000		142			13,700,000			59,460,861			93,329			13,700,000			59,554,190		73,254,190			(3,914,535	)		69,339,655	—
Park West (CA)	Los Angeles, CA		1987/1990		444			3,033,500			27,302,383			7,330,685			3,033,500			34,633,068		37,666,568			(21,889,796	)		15,776,772	—
Parkfield	Denver, CO		2000		476			8,330,000			28,667,618			3,057,365			8,330,000			31,724,983		40,054,983			(14,820,148	)		25,234,835	—
Parkside	Union City, CA		1979		208			6,246,700			11,827,453			3,833,813			6,246,700			15,661,266		21,907,966			(9,486,679	)		12,421,287	—
Pegasus	Los Angeles, CA (G)		1949/2003		322			18,094,052			81,905,948			2,015,760			18,094,052			83,921,708		102,015,760			(12,457,511	)		89,558,249	—
Pentagon City	Arlington, VA (G)		1990		298			28,300,000			79,387,601			145,906			28,300,000			79,533,507		107,833,507			(6,012,255	)		101,821,252	—
Phillips Park	Wellesley, MA		1988		49			816,922			5,460,955			1,038,416			816,922			6,499,371		7,316,293			(3,280,138	)		4,036,155	—
Playa Del Rey	Playa Del Rey, CA		2004		354			60,900,000			90,085,898			407,504			60,900,000			90,493,402		151,393,402			(7,145,468	)		144,247,934	—
Playa Pacifica	Hermosa Beach, CA		1972		285			35,100,000			33,473,822			8,011,904			35,100,000			41,485,726		76,585,726			(16,371,788	)		60,213,938	—
Portofino	Chino Hills, CA		1989		176			3,572,400			14,660,994			3,352,092			3,572,400			18,013,086		21,585,486			(9,926,077	)		11,659,409	—
Portofino (Val)	Valencia, CA		1989		216			8,640,000			21,487,126			2,646,783			8,640,000			24,133,909		32,773,909			(11,529,488	)		21,244,421	—
Portside Towers	Jersey City, NJ (G)		1992-1997		527			22,487,006			96,842,913			18,435,833			22,487,006			115,278,746		137,765,752			(61,617,346	)		76,148,406	—
Potrero	San Francisco, CA		(F)		—			40,830,011			2,683,265			—			40,830,011			2,683,265		43,513,276			—			43,513,276	—
Preserve at Deer Creek	Deerfield Beach, FL		1997		540			13,500,000			60,011,208			9,643,309			13,500,000			69,654,517		83,154,517			(24,599,996	)		58,554,521	—
Prime, The	Arlington, VA		2002		256			32,000,000			64,436,539			965,087			32,000,000			65,401,626		97,401,626			(19,038,929	)		78,362,697	—
Promenade at Aventura	Aventura, FL		1995		296			13,320,000			30,353,748			6,552,908			13,320,000			36,906,656		50,226,656			(16,970,116	)		33,256,540	—
Promenade at Town Center I	Valencia, CA		2001		294			14,700,000			35,390,279			2,206,279			14,700,000			37,596,558		52,296,558			(14,095,067	)		38,201,491	—
Promenade at Town Center II	Valencia, CA		2001		270			13,500,000			34,405,636			1,985,501			13,500,000			36,391,137		49,891,137			(13,530,181	)		36,360,956	—
Promenade at Wyndham Lakes	Coral Springs, FL		1998		332			6,640,000			26,743,760			5,005,200			6,640,000			31,748,960		38,388,960			(14,987,283	)		23,401,677	—
Promenade Terrace	Corona, CA		1990		330			2,272,800			20,546,289			5,691,127			2,272,800			26,237,416		28,510,216			(16,670,485	)		11,839,731	—
Quarry Hills	Quincy, MA		2006		316			26,900,000			84,983,599			140,458			26,900,000			85,124,057		112,024,057			(6,865,171	)		105,158,886	—
Red 160 (fka Redmond Way)	Redmond , WA (G)		2011		250			15,546,376			65,320,010			504,378			15,546,376			65,824,388		81,370,764			(6,551,308	)		74,819,456	—
Red Road Commons	Miami, FL (G)		2009		404			27,383,547			99,656,440			1,497,545			27,383,547			101,153,985		128,537,532			(14,269,702	)		114,267,830	—
Redmond Court	Bellevue, WA		1977		206			10,300,000			33,713,933			294,313			10,300,000			34,008,246		44,308,246			(2,592,517	)		41,715,729	—
Regency Palms	Huntington Beach, CA		1969		310			1,857,400			16,713,254			5,247,158			1,857,400			21,960,412		23,817,812			(14,160,070	)		9,657,742	—
Renaissance Villas	Berkeley, CA (G)		1998		34			2,458,000			4,542,000			105,946			2,458,000			4,647,946		7,105,946			(1,193,952	)		5,911,994	—
Reserve at Ashley Lake	Boynton Beach, FL		1990		440			3,520,400			23,332,494			6,605,628			3,520,400			29,938,122		33,458,522			(17,387,775	)		16,070,747	—
Reserve at Town Center II (WA)	Mill Creek, WA		2009		100			4,310,417			17,165,142			64,229			4,310,417			17,229,371		21,539,788			(2,513,872	)		19,025,916	—
Reserve at Town Center III	Mill Creek, WA		(F)		—			2,089,388			16,339,822			—			2,089,388			16,339,822		18,429,210			—			18,429,210	—
Residences at Bayview	Pompano Beach, FL (G)		2004		225			5,783,545			39,334,455			894,691			5,783,545			40,229,146		46,012,691			(7,182,488	)		38,830,203	—
Residences at Westgate I (fka Westgate II)	Pasadena, CA		(F)		—			17,859,785			83,708,925			—			17,859,785			83,708,925		101,568,710			—			101,568,710	—
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
Residences at Westgate II (fka Westgate III)	Pasadena, CA		(F)		—			12,118,061			19,127,918			—			12,118,061			19,127,918		31,245,979			—			31,245,979	—
Reunion at Redmond Ridge (fka Redmond Ridge)	Redmond, WA		2008		321			6,975,705			46,175,001			224,446			6,975,705			46,399,447		53,375,152			(9,881,175	)		43,493,977	—
Rianna I	Seattle, WA (G)		2000		78			2,268,160			14,864,482			266,542			2,268,160			15,131,024		17,399,184			(3,207,605	)		14,191,579	—
Ridgewood Village I&II	San Diego, CA		1997		408			11,809,500			34,004,048			4,287,842			11,809,500			38,291,890		50,101,390			(18,480,854	)		31,620,536	—
Rincon Hill	San Francisco, CA		(F)		—			42,000,000			7,574,181			—			42,000,000			7,574,181		49,574,181			—			49,574,181	—
Riva Terra I	Redwood City, CA		1986		304			34,963,355			85,202,482			628,146			34,963,355			85,830,628		120,793,983			(6,684,339	)		114,109,644	—
Riva Terra II	Redwood City, CA		1986		149			17,136,645			40,832,170			650,300			17,136,645			41,482,470		58,619,115			(3,089,614	)		55,529,501	—
River Tower	New York, NY (G)		1982		323			118,669,441			98,880,559			4,123,564			118,669,441			103,004,123		221,673,564			(24,034,599	)		197,638,965	—
Riverpark	Redmond, WA (G)		2009		319			14,355,000			80,894,049			129,922			14,355,000			81,023,971		95,378,971			(8,357,613	)		87,021,358	—
Rivers Bend (CT)	Windsor, CT		1973		373			3,325,517			22,573,826			3,026,927			3,325,517			25,600,753		28,926,270			(12,625,301	)		16,300,969	—
Riverview Condominiums	Norwalk, CT		1991		92			2,300,000			7,406,730			2,346,640			2,300,000			9,753,370		12,053,370			(5,182,720	)		6,870,650	—
Rolling Green (Amherst)	Amherst, MA		1970		204			1,340,702			8,962,317			3,899,396			1,340,702			12,861,713		14,202,415			(7,180,118	)		7,022,297	—
Rolling Green (Milford)	Milford, MA		1970		304			2,012,350			13,452,150			5,371,687			2,012,350			18,823,837		20,836,187			(9,832,847	)		11,003,340	—
Rosecliff II	Quincy, MA		2005		130			4,922,840			30,202,160			376,039			4,922,840			30,578,199		35,501,039			(3,928,769	)		31,572,270	—
Rosslyn	Arlington, VA (G)		2003		314			31,400,000			109,727,825			67,784			31,400,000			109,795,609		141,195,609			(7,664,303	)		133,531,306	—
Sabal Palm at Lake Buena Vista	Orlando, FL		1988		400			2,800,000			23,687,893			6,932,172			2,800,000			30,620,065		33,420,065			(16,048,657	)		17,371,408	—
Sabal Pointe	Coral Springs, FL		1995		275			1,951,600			17,570,508			6,418,274			1,951,600			23,988,782		25,940,382			(14,670,174	)		11,270,208	—
Sage	Everett, WA		2002		123			2,500,000			12,021,256			567,364			2,500,000			12,588,620		15,088,620			(4,281,852	)		10,806,768	—
Sakura Crossing	Los Angeles, CA (G)		2009		230			14,641,990			42,858,010			280,897			14,641,990			43,138,907		57,780,897			(6,186,384	)		51,594,513	—
Sausalito	Sausalito, CA		1978		198			26,000,000			28,714,965			169,663			26,000,000			28,884,628		54,884,628			(3,138,534	)		51,746,094	—
Savoy at Dayton Station I & II (fka Savoy I)	Aurora, CO		2001		444			5,450,295			38,765,670			3,156,829			5,450,295			41,922,499		47,372,794			(15,725,082	)		31,647,712	—
Savoy at Dayton Station III (fka Savoy III)	Aurora, CO		2012		168			659,165			21,271,331			59,151			659,165			21,330,482		21,989,647			(1,512,605	)		20,477,042	—
Scarborough Square	Rockville, MD		1967		121			1,815,000			7,608,126			2,828,563			1,815,000			10,436,689		12,251,689			(6,175,785	)		6,075,904	—
Seventh & James	Seattle, WA		1992		96			663,800			5,974,803			3,562,306			663,800			9,537,109		10,200,909			(5,910,718	)		4,290,191	—
Shadow Creek	Winter Springs, FL		2000		280			6,000,000			21,719,768			2,122,402			6,000,000			23,842,170		29,842,170			(9,008,244	)		20,833,926	—
Sheffield Court	Arlington, VA		1986		597			3,342,381			31,337,332			12,888,683			3,342,381			44,226,015		47,568,396			(27,676,964	)		19,891,432	—
Sheridan Lake Club	Dania Beach, FL		2001		240			12,000,000			23,170,580			1,772,157			12,000,000			24,942,737		36,942,737			(8,564,889	)		28,377,848	—
Sheridan Ocean Club combined	Dania Beach, FL		1991		648			18,313,414			47,091,594			17,044,266			18,313,414			64,135,860		82,449,274			(30,116,438	)		52,332,836	—
Skycrest	Valencia, CA		1999		264			10,560,000			25,574,457			2,239,072			10,560,000			27,813,529		38,373,529			(13,059,276	)		25,314,253	—
Skylark	Union City, CA		1986		174			1,781,600			16,731,916			1,914,660			1,781,600			18,646,576		20,428,176			(10,171,464	)		10,256,712	—
Skyline Terrace	Burlingame, CA		1967 & 1987		138			16,836,000			35,414,000			3,846,309			16,836,000			39,260,309		56,096,309			(6,410,921	)		49,685,388	—
Skyline Towers	Falls Church, VA (G)		1971		939			78,278,200			91,485,591			30,593,973			78,278,200			122,079,564		200,357,764			(49,094,497	)		151,263,267	—
Sonterra at Foothill Ranch	Foothill Ranch, CA		1997		300			7,503,400			24,048,507			1,897,617			7,503,400			25,946,124		33,449,524			(14,258,820	)		19,190,704	—
South San Francisco	San Francisco, CA (G)		2007		360			68,900,000			80,240,812			413,552			68,900,000			80,654,364		149,554,364			(7,124,507	)		142,429,857	—
Southwood	Palo Alto, CA		1985		100			6,936,600			14,324,069			2,992,190			6,936,600			17,316,259		24,252,859			(9,441,621	)		14,811,238	—
Springbrook Estates	Riverside, CA		(F)		—			18,200,000			—			—			18,200,000			—		18,200,000			—			18,200,000	—
St. Andrews at Winston Park	Coconut Creek, FL		1997		284			5,680,000			19,812,090			4,291,946			5,680,000			24,104,036		29,784,036			(10,414,453	)		19,369,583	—
Summerset Village II	Chatsworth, CA		(F)		—			260,646			—			—			260,646			—		260,646			—			260,646	—
Summit & Birch Hill	Farmington, CT		1967		186			1,757,438			11,748,112			3,297,807			1,757,438			15,045,919		16,803,357			(7,782,721	)		9,020,636	—
Summit at Lake Union	Seattle, WA		1995 -1997		150			1,424,700			12,852,461			4,247,599			1,424,700			17,100,060		18,524,760			(9,836,580	)		8,688,180	—
Tallman	Seattle, WA		(F)		—			16,807,519			6,589,411			—			16,807,519			6,589,411		23,396,930			—			23,396,930	—
Tasman (fka Vista Montana - Residential)	San Jose, CA		(F)		—			27,679,638			21,699,903			—			27,679,638			21,699,903		49,379,541			—			49,379,541	—
Ten23 (fka 500 West 23rd Street)	New York, NY (G)		2011		111			—			58,794,517			84,180			—			58,878,697		58,878,697			(3,920,806	)		54,957,891	—
Terraces, The	San Francisco, CA (G)		1975		117			14,087,610			16,314,151			602,473			14,087,610			16,916,624		31,004,234			(2,524,529	)		28,479,705	—
Third Square	Cambridge, MA (G)		2008/2009		471			26,767,171			218,770,581			2,768,015			26,767,171			221,538,596		248,305,767			(39,901,393	)		208,404,374	—
Tortuga Bay	Orlando, FL		2004		314			6,280,000			32,121,779			1,291,995			6,280,000			33,413,774		39,693,774			(11,379,630	)		28,314,144	—
Town Center South Commercial Tract	St. Charles, MD		(F)		—			1,500,000			3,896			—			1,500,000			3,896		1,503,896			—			1,503,896	—
Town Square at Mark Center Phase II	Alexandria, VA		2001		272			15,568,464			55,029,607			493,433			15,568,464			55,523,040		71,091,504			(10,475,335	)		60,616,169	—
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
Trump Place, 140 Riverside	New York, NY (G)		2003		354			103,539,100			94,082,725			3,132,394			103,539,100			97,215,119		200,754,219			(30,036,069	)		170,718,150	—
Trump Place, 160 Riverside	New York, NY (G)		2001		455			139,933,500			190,964,745			8,737,813			139,933,500			199,702,558		339,636,058			(59,965,660	)		279,670,398	—
Trump Place, 180 Riverside	New York, NY (G)		1998		516			144,968,250			138,346,681			7,605,676			144,968,250			145,952,357		290,920,607			(45,759,852	)		245,160,755	—
Urbana (fka Market Street Landing)	Seattle, WA (G)		(F)		—			12,542,418			64,979,196			—			12,542,418			64,979,196		77,521,614			—			77,521,614	—
Uwajimaya Village	Seattle, WA		2002		176			8,800,000			22,188,288			394,029			8,800,000			22,582,317		31,382,317			(7,993,609	)		23,388,708	—
Vantage Pointe	San Diego, CA (G)		2009		679			9,403,960			190,596,040			4,923,730			9,403,960			195,519,770		204,923,730			(28,370,366	)		176,553,364	—
Veloce	Redmond, WA (G)		2009		322			15,322,724			76,176,594			55,022			15,322,724			76,231,616		91,554,340			(4,774,971	)		86,779,369	—
Veridian (fka Silver Spring)	Silver Spring, MD (G)		2009		457			18,539,817			130,407,365			840,456			18,539,817			131,247,821		149,787,638			(20,852,761	)		128,934,877	—
Villa Solana	Laguna Hills, CA		1984		272			1,665,100			14,985,678			8,837,465			1,665,100			23,823,143		25,488,243			(15,391,905	)		10,096,338	—
Village at Bear Creek	Lakewood, CO		1987		472			4,519,700			40,676,390			5,372,025			4,519,700			46,048,415		50,568,115			(26,558,906	)		24,009,209	—
Village at Howard Hughes, The	Los Angeles, CA		(F)		—			79,175,802			7,944,921			—			79,175,802			7,944,921		87,120,723			—			87,120,723	—
Virginia Square	Arlington, VA (G)		2002		231			—			86,431,862			782,084			—			87,213,946		87,213,946			(5,921,143	)		81,292,803	—
Vista Del Lago	Mission Viejo, CA		1986-1988		608			4,525,800			40,736,293			15,232,854			4,525,800			55,969,147		60,494,947			(37,059,350	)		23,435,597	—
Walden Park	Cambridge, MA		1966		232			12,448,888			52,044,448			2,469,745			12,448,888			54,514,193		66,963,081			(7,696,848	)		59,266,233	—
Waterford Place (CO)	Thornton, CO		1998		336			5,040,000			29,946,419			1,737,955			5,040,000			31,684,374		36,724,374			(12,866,707	)		23,857,667	—
Watertown Square	Watertown, MA (G)		2005		134			16,800,000			34,335,683			47,280			16,800,000			34,382,963		51,182,963			(2,762,709	)		48,420,254	—
Webster Green	Needham, MA		1985		77			1,418,893			9,485,006			1,182,355			1,418,893			10,667,361		12,086,254			(5,110,126	)		6,976,128	—
Welleby Lake Club	Sunrise, FL		1991		304			3,648,000			17,620,879			5,771,885			3,648,000			23,392,764		27,040,764			(12,645,731	)		14,395,033	—
West 96th	New York, NY (G)		1987		207			84,800,000			67,824,685			556,573			84,800,000			68,381,258		153,181,258			(8,307,241	)		144,874,017	—
West End Apartments (fka Emerson place/ CRP II)	Boston, MA (G)		2008		310			469,546			163,123,022			660,903			469,546			163,783,925		164,253,471			(33,407,167	)		130,846,304	—
West Seattle	Seattle, WA		(F)		—			11,726,305			6,992,695			—			11,726,305			6,992,695		18,719,000			—			18,719,000	—
Westchester at Pavilions	Waldorf, MD (G)		2009		491			11,900,000			90,134,491			225,033			11,900,000			90,359,524		102,259,524			(5,417,460	)		96,842,064	—
Westchester at Rockville	Rockville, MD		2009		192			10,600,000			44,416,692			113,249			10,600,000			44,529,941		55,129,941			(3,504,357	)		51,625,584	—
Westmont	New York, NY (G)		1986		163			64,900,000			61,792,095			212,358			64,900,000			62,004,453		126,904,453			(6,001,580	)		120,902,873	—
Westside	Los Angeles, CA		2004		204			34,200,000			57,431,465			363,066			34,200,000			57,794,531		91,994,531			(4,346,093	)		87,648,438	—
Westside Villas I	Los Angeles, CA		1999		21			1,785,000			3,233,254			305,913			1,785,000			3,539,167		5,324,167			(1,688,575	)		3,635,592	—
Westside Villas II	Los Angeles, CA		1999		23			1,955,000			3,541,435			194,242			1,955,000			3,735,677		5,690,677			(1,714,567	)		3,976,110	—
Westside Villas III	Los Angeles, CA		1999		36			3,060,000			5,538,871			288,802			3,060,000			5,827,673		8,887,673			(2,668,163	)		6,219,510	—
Westside Villas IV	Los Angeles, CA		1999		36			3,060,000			5,539,390			297,249			3,060,000			5,836,639		8,896,639			(2,674,400	)		6,222,239	—
Westside Villas V	Los Angeles, CA		1999		60			5,100,000			9,224,485			510,334			5,100,000			9,734,819		14,834,819			(4,470,041	)		10,364,778	—
Westside Villas VI	Los Angeles, CA		1989		18			1,530,000			3,023,523			274,577			1,530,000			3,298,100		4,828,100			(1,547,728	)		3,280,372	—
Westside Villas VII	Los Angeles, CA		2001		53			4,505,000			10,758,900			486,606			4,505,000			11,245,506		15,750,506			(4,563,900	)		11,186,606	—
Westwood Glen	Westwood, MA		1972		156			1,616,505			10,806,004			2,100,152			1,616,505			12,906,156		14,522,661			(6,122,453	)		8,400,208	—
Windridge (CA)	Laguna Niguel, CA		1989		344			2,662,900			23,985,497			8,186,273			2,662,900			32,171,770		34,834,670			(20,278,246	)		14,556,424	—
Winston, The (FL)	Pembroke Pines, FL		2001/2003		464			18,561,000			49,527,569			2,587,408			18,561,000			52,114,977		70,675,977			(16,723,548	)		53,952,429	—
Wood Creek (CA)	Pleasant Hill, CA		1987		256			9,729,900			23,009,768			6,379,038			9,729,900			29,388,806		39,118,706			(16,514,665	)		22,604,041	—
Woodbridge (CT)	Newington, CT		1968		73			498,377			3,331,548			1,162,730			498,377			4,494,278		4,992,655			(2,242,801	)		2,749,854	—
Woodlake (WA)	Kirkland, WA		1984		288			6,631,400			16,735,484			3,227,436			6,631,400			19,962,920		26,594,320			(11,285,522	)		15,308,798	—
Woodland Park	East Palo Alto, CA (G)		1953		1,811			72,627,418			57,608,771			6,957,995			72,627,418			64,566,766		137,194,184			(18,860,924	)		118,333,260	—
Management Business	Chicago, IL		(D)		—			—			—			97,861,963			—			97,861,963		97,861,963			(74,865,128	)		22,996,835	—
Operating Partnership	Chicago, IL		(F)		—			—			680,439			—			—			680,439		680,439			—			680,439	—
Wholly Owned Unencumbered					67,220			4,699,200,739			11,787,198,737			900,502,358			4,699,200,739			12,687,701,095		17,386,901,834			(3,177,396,618	)		14,209,505,216	—
Wholly Owned Encumbered:
101 West End	New York, NY (G)		2000		506			190,600,000			133,101,447			561,190			190,600,000			133,662,637		324,262,637			(15,552,330	)		308,710,307	103,482,569
1401 Joyce on Pentagon Row	Arlington, VA		2004		326			9,780,000			89,668,165			469,955			9,780,000			90,138,120		99,918,120			(18,835,680	)		81,082,440	57,428,472
2501 Porter	Washington, D.C.		1988		202			13,000,000			75,723,794			580,537			13,000,000			76,304,331		89,304,331			(5,005,664	)		84,298,667	(L)
4701 Willard Ave	Chevy Chase, MD (G)		1966		513			76,921,130			153,947,682			6,804,185			76,921,130			160,751,867		237,672,997			(17,490,985	)		220,182,012	101,492,308
55 West Fifth I & II (fka Townhouse Plaza and Gardens)	San Mateo, CA		1964/1972		241			21,041,710			71,931,323			4,270,861			21,041,710			76,202,184		97,243,894			(6,417,972	)		90,825,922	29,964,633
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
929 House	Cambridge, MA (G)		1975		127			3,252,993			21,745,595			5,251,116			3,252,993			26,996,711		30,249,704			(12,478,794	)		17,770,910	2,135,579
Academy Village	North Hollywood, CA		1989		248			25,000,000			23,593,194			6,920,021			25,000,000			30,513,215		55,513,215			(12,789,197	)		42,724,018	20,000,000
Acappella	Pasadena, CA		2002		143			5,839,548			29,360,452			336,928			5,839,548			29,697,380		35,536,928			(5,125,356	)		30,411,572	20,122,719
Acton Courtyard	Berkeley, CA (G)		2003		71			5,550,000			15,785,509			159,258			5,550,000			15,944,767		21,494,767			(4,558,047	)		16,936,720	9,920,000
Alborada	Fremont, CA		1999		442			24,310,000			59,214,129			2,849,892			24,310,000			62,064,021		86,374,021			(29,612,754	)		56,761,267	(I)
Arches, The	Sunnyvale, CA		1974		410			26,650,000			62,850,000			696,941			26,650,000			63,546,941		90,196,941			(9,829,040	)		80,367,901	(J)
Artech Building	Berkeley, CA (G)		2002		21			1,642,000			9,152,518			114,811			1,642,000			9,267,329		10,909,329			(2,421,777	)		8,487,552	3,200,000
Artisan Square	Northridge, CA		2002		140			7,000,000			20,537,359			977,155			7,000,000			21,514,514		28,514,514			(8,466,816	)		20,047,698	22,779,715
Avanti	Anaheim, CA		1987		162			12,960,000			18,497,683			1,248,387			12,960,000			19,746,070		32,706,070			(6,504,421	)		26,201,649	18,169,458
Avenir	Boston, MA (G)		2009		241			—			115,095,512			94,558			—			115,190,070		115,190,070			(8,460,359	)		106,729,711	95,993,276
Bachenheimer Building	Berkeley, CA (G)		2004		44			3,439,000			13,866,379			115,944			3,439,000			13,982,323		17,421,323			(3,775,179	)		13,646,144	8,585,000
Bella Vista I, II, III Combined	Woodland Hills, CA		2003-2007		579			31,682,754			121,095,786			2,565,629			31,682,754			123,661,415		155,344,169			(36,751,609	)		118,592,560	58,055,099
Berkeleyan	Berkeley, CA (G)		1998		56			4,377,000			16,022,110			305,173			4,377,000			16,327,283		20,704,283			(4,544,908	)		16,159,375	8,290,000
Breakwater at Marina Del Rey	Marina Del Rey, CA		1964-1969		224			—			72,690,403			49,738			—			72,740,141		72,740,141			(5,675,272	)		67,064,869	27,000,000
Broadway	Santa Monica, CA (G)		2001		101			12,600,000			34,635,854			128,778			12,600,000			34,764,632		47,364,632			(2,310,263	)		45,054,369	(L)
Calvert Woodley	Washington, D.C.		1962		136			12,600,000			43,815,169			110,763			12,600,000			43,925,932		56,525,932			(3,478,526	)		53,047,406	(L)
Camargue	New York, NY (G)		1976		261			79,400,000			79,936,285			238,142			79,400,000			80,174,427		159,574,427			(8,175,241	)		151,399,186	(L)
Canterbury	Germantown, MD		1986		544			2,781,300			32,942,531			14,871,303			2,781,300			47,813,834		50,595,134			(31,347,905	)		19,247,229	31,680,000
Carmel Terrace	San Diego, CA		1988-1989		384			2,288,300			20,596,281			10,356,205			2,288,300			30,952,486		33,240,786			(21,171,170	)		12,069,616	(J)
Chelsea	New York, NY (G)		2003		266			59,900,000			156,987,648			54,996			59,900,000			157,042,644		216,942,644			(11,425,444	)		205,517,200	75,818,310
Chelsea Square	Redmond, WA		1991		113			3,397,100			9,289,074			1,706,006			3,397,100			10,995,080		14,392,180			(5,903,575	)		8,488,605	9,270,000
Church Corner	Cambridge, MA (G)		1987		85			5,220,000			16,744,643			1,561,158			5,220,000			18,305,801		23,525,801			(6,372,695	)		17,153,106	12,000,000
Citrus Suites	Santa Monica, CA		1978		70			9,000,000			17,083,391			34,231			9,000,000			17,117,622		26,117,622			(1,246,430	)		24,871,192	(L)
City Pointe	Fullerton, CA (G)		2004		183			6,863,792			36,476,208			654,735			6,863,792			37,130,943		43,994,735			(7,526,423	)		36,468,312	22,016,556
CityView at Longwood	Boston, MA (G)		1970		295			14,704,898			79,195,102			8,167,305			14,704,898			87,362,407		102,067,305			(13,768,517	)		88,298,788	24,709,587
Clarendon, The	Arlington, VA (G)		2005		292			30,400,340			103,824,660			1,754,620			30,400,340			105,579,280		135,979,620			(14,363,043	)		121,616,577	43,026,348
Cleveland House	Washington, D.C.		1953		214			18,300,000			66,826,715			171,023			18,300,000			66,997,738		85,297,738			(4,962,013	)		80,335,725	(L)
Colorado Pointe	Denver, CO		2006		193			5,790,000			28,815,607			552,283			5,790,000			29,367,890		35,157,890			(9,575,767	)		25,582,123	(J)
Columbia Crossing	Arlington, VA		1991		247			23,500,000			53,437,514			547,130			23,500,000			53,984,644		77,484,644			(4,430,068	)		73,054,576	(L)
Connecticut Heights	Washington, D.C.		1974		518			27,600,000			114,728,311			303,660			27,600,000			115,031,971		142,631,971			(8,350,350	)		134,281,621	(K)
Copper Canyon	Highlands Ranch, CO		1999		222			1,442,212			16,251,114			1,604,884			1,442,212			17,855,998		19,298,210			(9,313,767	)		9,984,443	(J)
Deerwood (SD)	San Diego, CA		1990		316			2,082,095			18,739,815			13,788,977			2,082,095			32,528,792		34,610,887			(22,264,629	)		12,346,258	(J)
Del Mar Ridge	San Diego, CA		1998		181			7,801,824			36,948,176			3,033,539			7,801,824			39,981,715		47,783,539			(8,503,934	)		39,279,605	23,789,381
East 39th	New York, NY (G)		2001		254			48,900,000			96,938,591			208,601			48,900,000			97,147,192		146,047,192			(7,978,821	)		138,068,371	58,822,321
Estates at Tanglewood	Westminster, CO		2003		504			7,560,000			51,256,538			2,577,858			7,560,000			53,834,396		61,394,396			(18,061,981	)		43,332,415	(I)
Fairchase	Fairfax, VA		2007		392			23,500,000			88,292,669			75,367			23,500,000			88,368,036		111,868,036			(6,417,469	)		105,450,567	(L)
Fairfield	Stamford, CT (G)		1996		263			6,510,200			39,690,120			6,195,719			6,510,200			45,885,839		52,396,039			(25,583,560	)		26,812,479	34,595,000
Fine Arts Building	Berkeley, CA (G)		2004		100			7,817,000			26,462,772			199,005			7,817,000			26,661,777		34,478,777			(7,380,682	)		27,098,095	16,215,000
Flats at DuPont Circle	Washington, D.C.		1967		306			35,200,000			109,508,602			182,015			35,200,000			109,690,617		144,890,617			(7,612,197	)		137,278,420	(L)
Gaia Building	Berkeley, CA (G)		2000		91			7,113,000			25,623,826			208,640			7,113,000			25,832,466		32,945,466			(7,139,073	)		25,806,393	14,630,000
Gaithersburg Station	Gaithersburg, MD (G)		2013		389			17,500,000			74,677,374			37,618			17,500,000			74,714,992		92,214,992			(4,245,768	)		87,969,224	99,939,735
Gateway at Malden Center	Malden, MA (G)		1988		203			9,209,780			25,722,666			9,753,016			9,209,780			35,475,682		44,685,462			(15,740,054	)		28,945,408	14,970,000
Glo	Los Angeles, CA (G)		2008		201			16,047,022			48,650,963			221,243			16,047,022			48,872,206		64,919,228			(5,955,017	)		58,964,211	31,789,016
Hathaway	Long Beach, CA		1987		385			2,512,500			22,611,912			7,390,659			2,512,500			30,002,571		32,515,071			(19,468,132	)		13,046,939	46,517,800
Heights on Capitol Hill	Seattle, WA (G)		2006		104			5,425,000			21,138,028			181,923			5,425,000			21,319,951		26,744,951			(6,240,631	)		20,504,320	28,180,585
Heritage at Stone Ridge	Burlington, MA		2005		180			10,800,000			31,808,335			909,763			10,800,000			32,718,098		43,518,098			(10,781,687	)		32,736,411	27,235,117
Heronfield	Kirkland, WA		1990		202			9,245,000			27,017,749			1,544,319			9,245,000			28,562,068		37,807,068			(8,710,641	)		29,096,427	(J)
Hoboken	Hoboken, NJ		2000		301			27,900,000			170,002,320			166,997			27,900,000			170,169,317		198,069,317			(10,444,060	)		187,625,257	(K)
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company						Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)			Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land			Building & Fixtures			Building & Fixtures			Land			Building & Fixtures (A)		Total (B)			Accumulated Depreciation (C)		Investment in Real Estate, Net at 12/31/13 (B)		Encumbrances
Ivory Wood	Bothell, WA		2000		144			2,732,800			13,888,282			679,844			2,732,800			14,568,126		17,300,926			(5,337,998	)		11,962,928	8,020,000
Kelvin Court (fka Alta Pacific)	Irvine, CA		2008		132			10,752,145			34,649,929			163,968			10,752,145			34,813,897		45,566,042			(7,190,325	)		38,375,717	26,495,000
La Terrazza at Colma Station	Colma, CA (G)		2005		153			—			41,251,044			615,479			—			41,866,523		41,866,523			(11,499,213	)		30,367,310	25,175,000
Laguna Clara	Santa Clara, CA		1972		264			13,642,420			29,707,475			4,094,793			13,642,420			33,802,268		47,444,688			(13,238,970	)		34,205,718	(J)
Liberty Park	Brain Tree, MA		2000		202			5,977,504			26,749,111			2,759,086			5,977,504			29,508,197		35,485,701			(11,871,567	)		23,614,134	24,980,280
Liberty Tower	Arlington, VA (G)		2008		235			16,382,822			83,817,078			858,516			16,382,822			84,675,594		101,058,416			(14,112,008	)		86,946,408	47,439,130
Lindley	Encino, CA		2004		129			5,805,000			25,705,000			599,231			5,805,000			26,304,231		32,109,231			(4,053,076	)		28,056,155	21,088,981
Longview Place	Waltham, MA		2004		348			20,880,000			90,255,509			3,174,207			20,880,000			93,429,716		114,309,716			(28,207,183	)		86,102,533	60,073,423
Market Street Village	San Diego, CA		2006		229			13,740,000			40,757,301			884,586			13,740,000			41,641,887		55,381,887			(12,253,028	)		43,128,859	(J)
Marks	Englewood, CO (G)		1987		616			4,928,500			44,622,314			11,262,819			4,928,500			55,885,133		60,813,633			(31,863,973	)		28,949,660	19,195,000
Metro on First	Seattle, WA (G)		2002		102			8,540,000			12,209,981			415,057			8,540,000			12,625,038		21,165,038			(4,042,522	)		17,122,516	22,843,410
Midtown 24	Plantation, FL (G)		2010		247			10,129,900			58,770,100			1,225,984			10,129,900			59,996,084		70,125,984			(8,339,616	)		61,786,368	(J)
Mill Creek	Milpitas, CA		1991		516			12,858,693			57,168,503			3,728,226			12,858,693			60,896,729		73,755,422			(23,694,689	)		50,060,733	69,312,259
Miramar Lakes	Miramar, FL		2003		344			17,200,000			51,487,235			2,023,326			17,200,000			53,510,561		70,710,561			(17,652,020	)		53,058,541	(M)
Moda	Seattle, WA (G)		2009		251			12,649,228			36,842,012			687,636			12,649,228			37,529,648		50,178,876			(6,097,337	)		44,081,539	(N)
Monte Viejo	Phoenix, AZ		2004		480			12,700,000			45,926,784			1,259,854			12,700,000			47,186,638		59,886,638			(17,013,895	)		42,872,743	39,539,109
Montierra (CA)	San Diego, CA		1990		272			8,160,000			29,360,938			7,185,662			8,160,000			36,546,600		44,706,600			(18,654,006	)		26,052,594	(J)
Mosaic at Metro	Hyattsville, MD		2008		260			—			59,580,898			318,502			—			59,899,400		59,899,400			(11,320,611	)		48,578,789	43,807,598
New River Cove	Davie, FL		1999		316			15,800,000			46,142,895			1,517,594			15,800,000			47,660,489		63,460,489			(15,794,393	)		47,666,096	(J)
North Pier at Harborside	Jersey City, NJ		2003		297			4,000,159			94,290,590			2,379,299			4,000,159			96,669,889		100,670,048			(32,540,349	)		68,129,699	(I)
Northpark	Burlingame, CA		1972		510			38,607,000			77,477,449			10,317,077			38,607,000			87,794,526		126,401,526			(16,582,733	)		109,818,793	64,865,644
Oak Mill II	Germantown, MD		1985		192			854,133			10,233,947			6,491,391			854,133			16,725,338		17,579,471			(10,918,229	)		6,661,242	9,600,000
Oaks	Santa Clarita, CA		2000		520			23,400,000			61,020,438			3,457,727			23,400,000			64,478,165		87,878,165			(24,819,377	)		63,058,788	38,268,889
Olympus Towers	Seattle, WA (G)		2000		328			14,752,034			73,335,425			3,951,724			14,752,034			77,287,149		92,039,183			(27,657,976	)		64,381,207	49,875,780
Promenade	Santa Monica, CA (G)		1934/2001		58			9,000,000			14,079,234			25,302			9,000,000			14,104,536		23,104,536			(1,450,445	)		21,654,091	(L)
Providence	Bothell, WA		2000		200			3,573,621			19,055,505			719,661			3,573,621			19,775,166		23,348,787			(7,384,385	)		15,964,402	(I)
Reserve at Clarendon Centre, The	Arlington, VA (G)		2003		252			10,500,000			52,812,935			3,634,286			10,500,000			56,447,221		66,947,221			(20,344,998	)		46,602,223	(J)
Reserve at Eisenhower, The	Alexandria, VA		2002		226			6,500,000			34,585,060			1,325,152			6,500,000			35,910,212		42,410,212			(13,939,522	)		28,470,690	(J)
Reserve at Empire Lakes	Rancho Cucamonga, CA		2005		467			16,345,000			73,080,670			1,922,681			16,345,000			75,003,351		91,348,351			(23,271,791	)		68,076,560	(I)
Reserve at Fairfax Corner	Fairfax, VA		2001		652			15,804,057			63,129,050			4,057,506			15,804,057			67,186,556		82,990,613			(27,294,907	)		55,695,706	84,778,876
Reserve at Potomac Yard	Alexandria, VA		2002		588			11,918,917			68,862,641			5,233,629			11,918,917			74,096,270		86,015,187			(26,089,157	)		59,926,030	66,470,000
Reserve at Town Center (WA)	Mill Creek, WA		2001		389			10,369,400			41,172,081			2,154,112			10,369,400			43,326,193		53,695,593			(15,561,433	)		38,134,160	29,160,000
Rianna II	Seattle, WA (G)		2002		78			2,161,840			14,433,614			73,166			2,161,840			14,506,780		16,668,620			(3,061,770	)		13,606,850	9,889,090
Rockingham Glen	West Roxbury, MA		1974		143			1,124,217			7,515,160			2,012,885			1,124,217			9,528,045		10,652,262			(4,830,794	)		5,821,468	927,712
San Mateo	San Mateo, CA (G)		2001		575			71,900,000			213,372,253			662,020			71,900,000			214,034,273		285,934,273			(14,976,876	)		270,957,397	(L)
Santa Clara	Santa Clara, CA		2000		450			—			124,542,070			239,471			—			124,781,541		124,781,541			(8,966,799	)		115,814,742	(L)
Siena Terrace	Lake Forest, CA		1988		356			8,900,000			24,083,024			5,585,518			8,900,000			29,668,542		38,568,542			(14,937,859	)		23,630,683	38,440,808
Skyview	Rancho Santa Margarita, CA		1999		260			3,380,000			21,952,863			2,131,723			3,380,000			24,084,586		27,464,586			(12,416,719	)		15,047,867	30,889,928
South Market	San Francisco, CA (G)		1986		410			79,900,000			178,635,578			1,278,976			79,900,000			179,914,554		259,814,554			(13,042,186	)		246,772,368	(L)
South Winds	Fall River, MA		1971		404			2,481,821			16,780,359			4,774,276			2,481,821			21,554,635		24,036,456			(11,230,606	)		12,805,850	3,092,625
Stonegate (CO)	Broomfield, CO		2003		350			8,750,000			32,950,375			3,114,108			8,750,000			36,064,483		44,814,483			(12,690,883	)		32,123,600	(I)
Stoney Ridge	Dale City, VA		1985		264			8,000,000			24,147,091			5,705,255			8,000,000			29,852,346		37,852,346			(11,944,034	)		25,908,312	13,886,034
Summerset Village	Chatsworth, CA		1985		280			2,629,804			23,670,889			6,252,474			2,629,804			29,923,363		32,553,167			(17,328,409	)		15,224,758	38,039,912
Talleyrand	Tarrytown, NY		1997-1998		300			12,000,000			49,838,160			4,046,367			12,000,000			53,884,527		65,884,527			(23,842,054	)		42,042,473	35,000,000
Teresina	Chula Vista, CA		2000		440			28,600,000			61,916,670			2,255,817			28,600,000			64,172,487		92,772,487			(20,981,272	)		71,791,215	41,956,105
Toscana	Irvine, CA		1991/1993		563			39,410,000			50,806,072			7,547,102			39,410,000			58,353,174		97,763,174			(28,234,404	)		69,528,770	71,243,194
Touriel Building	Berkeley, CA (G)		2004		35			2,736,000			7,810,027			170,436			2,736,000			7,980,463		10,716,463			(2,276,033	)		8,440,430	5,050,000
Town Square at Mark Center I (fka Millbrook I)	Alexandria, VA		1996		406			24,360,000			86,178,714			2,852,824			24,360,000			89,031,538		113,391,538			(28,837,370	)		84,554,168	77,353,222
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
Description								Initial Cost to Company								Cost Capitalized Subsequent to Acquisition(Improvements, net) (E)				Gross Amount Carried at Close of Period 12/31/13
Apartment Name	Location		Date of Construction		Units (H)			Land				Building & Fixtures				Building & Fixtures				Land			Building & Fixtures (A)				Total (B)		Accumulated Depreciation (C)			Investment in Real Estate, Net at 12/31/13 (B)			Encumbrances
Uptown Square	Denver, CO (G)		1999/2001		696			17,492,000				100,696,541				3,261,624				17,492,000			103,958,165				121,450,165		(35,022,638		)		86,427,527		99,190,116
Van Ness	Washington, D.C.		1970		625			56,300,000				142,204,077				1,315,370				56,300,000			143,519,447				199,819,447		(11,899,235		)		187,920,212		(K)
Versailles	Woodland Hills, CA		1991		253			12,650,000				33,656,292				4,979,374				12,650,000			38,635,666				51,285,666		(15,459,664		)		35,826,002		30,372,953
Versailles (K-Town)	Los Angeles, CA		2008		225			10,590,975				44,409,025				291,622				10,590,975			44,700,647				55,291,622		(8,870,160		)		46,421,462		29,826,475
Victor on Venice	Los Angeles, CA (G)		2006		115			10,350,000				35,433,437				261,071				10,350,000			35,694,508				46,044,508		(10,004,367		)		36,040,141		(J)
Vintage	Ontario, CA		2005-2007		300			7,059,230				47,677,762				367,174				7,059,230			48,044,936				55,104,166		(14,167,823		)		40,936,343		33,000,000
Vista on Courthouse	Arlington, VA		2008		220			15,550,260				69,449,740				643,404				15,550,260			70,093,144				85,643,404		(13,517,115		)		72,126,289		31,380,000
Water Park Towers	Arlington, VA		1989		362			34,400,000				109,218,415				1,853,467				34,400,000			111,071,882				145,471,882		(8,181,264		)		137,290,618		(K)
West 54th	New York, NY (G)		2001		222			60,900,000				48,772,556				134,368				60,900,000			48,906,924				109,806,924		(5,718,712		)		104,088,212		46,390,558
Westgate (fka Westgate I)	Pasadena, CA		2010		480			22,898,848				133,553,242				278,435				22,898,848			133,831,677				156,730,525		(13,887,631		)		142,842,894		96,935,000
Woodleaf	Campbell, CA		1984		178			8,550,600				16,988,182				3,978,891				8,550,600			20,967,073				29,517,673		(10,546,255		)		18,971,418		17,858,854
Wholly Owned Encumbered					32,101			1,935,536,426				6,183,275,205				279,055,895				1,935,536,426			6,462,331,100				8,397,867,526		(1,457,510,357		)		6,940,357,169		2,703,534,549
Partially Owned Unencumbered:
2300 Elliott	Seattle, WA		1992		92			796,800				7,173,725				6,169,587				796,800			13,343,312				14,140,112		(9,199,580		)		4,940,532		—
400 Park Avenue South (EQR)	New York, NY		(F)		—			76,292,169				96,230,632				—				76,292,169			96,230,632				172,522,801		—				172,522,801		—
400 Park Avenue South (Toll)	New York, NY		(F)		—			58,090,357				38,681,373				—				58,090,357			38,681,373				96,771,730		—				96,771,730		—
Canyon Ridge	San Diego, CA		1989		162			4,869,448				11,955,063				1,979,252				4,869,448			13,934,315				18,803,763		(8,130,970		)		10,672,793		—
Country Oaks	Agoura Hills, CA		1985		256			6,105,000				29,561,865				3,477,905				6,105,000			33,039,770				39,144,770		(14,454,678		)		24,690,092		—
East Palmetto Park	Boca Raton, FL		(F)		—			20,200,000				281,641				—				20,200,000			281,641				20,481,641		—				20,481,641		—
Fox Ridge	Englewood, CO		1984		300			2,490,000				17,522,114				4,304,324				2,490,000			21,826,438				24,316,438		(10,802,571		)		13,513,867		—
Hudson Crossing II	New York, NY		(F)		—			5,000,000				—				—				5,000,000			—				5,000,000		—				5,000,000		—
Monterra in Mill Creek	Mill Creek, WA		2003		139			2,800,000				13,255,122				554,347				2,800,000			13,809,469				16,609,469		(4,616,186		)		11,993,283		—
Park Aire	Wellington, FL		(F)		—			8,000,000				39,445,363				—				8,000,000			39,445,363				47,445,363		—				47,445,363		—
Strayhorse at Arrowhead Ranch	Glendale, AZ		1998		136			4,400,000				12,968,002				377,633				4,400,000			13,345,635				17,745,635		(4,432,500		)		13,313,135		—
Ventura	Ventura, CA		2002		192			8,600,000				44,580,294				121,646				8,600,000			44,701,940				53,301,940		(3,355,103		)		49,946,837		—
Wood Creek II (fka Willow Brook)	Pleasant Hill, CA		1985		228			5,055,000				38,388,672				3,585,226				5,055,000			41,973,898				47,028,898		(14,964,187		)		32,064,711		—
Partially Owned Unencumbered					1,505			202,698,774				350,043,866				20,569,920				202,698,774			370,613,786				573,312,560		(69,955,775		)		503,356,785		—
Partially Owned Encumbered:
Bellevue Meadows	Bellevue, WA		1983		180			4,507,100				12,574,814				4,287,572				4,507,100			16,862,386				21,369,486		(9,678,161		)		11,691,325		16,538,000
Canyon Creek (CA)	San Ramon, CA		1984		268			5,425,000				18,812,120				6,335,761				5,425,000			25,147,881				30,572,881		(11,655,149		)		18,917,732		28,200,000
Elliot Bay	Seattle, WA (G)		1992		147			7,600,000				36,066,728				424,904				7,600,000			36,491,632				44,091,632		(2,384,136		)		41,707,496		(K)
Isle at Arrowhead Ranch	Glendale, AZ		1996		256			1,650,237				19,593,123				1,988,568				1,650,237			21,581,691				23,231,928		(12,232,711		)		10,999,217		17,700,000
Lantern Cove	Foster City, CA		1985		232			6,945,000				23,064,976				5,303,293				6,945,000			28,368,269				35,313,269		(12,461,380		)		22,851,889		36,455,000
Rosecliff	Quincy, MA		1990		156			5,460,000				15,721,570				2,387,533				5,460,000			18,109,103				23,569,103		(9,071,317		)		14,497,786		17,400,000
Schooner Bay I	Foster City, CA		1985		168			5,345,000				20,390,618				4,467,622				5,345,000			24,858,240				30,203,240		(10,916,753		)		19,286,487		28,870,000
Schooner Bay II	Foster City, CA		1985		144			4,550,000				18,064,764				4,093,294				4,550,000			22,158,058				26,708,058		(9,848,801		)		16,859,257		26,175,000
Surrey Downs	Bellevue, WA		1986		122			3,057,100				7,848,618				2,309,004				3,057,100			10,157,622				13,214,722		(5,582,575		)		7,632,147		9,829,000
Virgil Square	Los Angeles, CA		1979		142			5,500,000				15,216,613				1,659,199				5,500,000			16,875,812				22,375,812		(5,932,912		)		16,442,900		9,900,000
Wisconsin Place	Chevy Chase, MD		2009		432			—				172,089,355				126,994				—			172,216,349				172,216,349		(13,082,677		)		159,133,672		143,605,310
Partially Owned Encumbered					2,247			50,039,437				359,443,299				33,383,744				50,039,437			392,827,043				442,866,480		(102,846,572		)		340,019,908		334,672,310
Portfolio/Entity Encumbrances (1)																																			2,135,958,561
Total Consolidated Investment in Real Estate					103,073			$	6,887,475,376			$	18,679,961,107			$	1,233,511,917			$	6,887,475,376		$	19,913,473,024			$	26,800,948,400	$	(4,807,709,322	)		$	21,993,239,078	$	5,174,165,420
-1	See attached Encumbrances Reconciliation
EQUITY RESIDENTIAL
ERP OPERATING LIMITED PARTNERSHIP
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2013
NOTES:
(A)	The balance of furniture & fixtures included in the total investment in real estate amount was $1,214,220,221 as of December 31, 2013.
(B)	The cost, net of accumulated depreciation, for Federal Income Tax purposes as of December 31, 2013 was approximately $15.2 billion.
(C)	The life to compute depreciation for building is 30 years, for building improvements ranges from 5 to 15 years, for furniture & fixtures and replacements is 5 to 10 years, and for lease intangibles is the average remaining term of each respective lease.
(D)	This asset consists of various acquisition dates and largely represents furniture, fixtures and equipment, leasehold improvements and capitalized software costs owned by the Management Business, which are generally depreciated over periods ranging from 3 to 7 years.
(E)	Primarily represents capital expenditures for major maintenance and replacements incurred subsequent to each property’s acquisition date.
(F)	Represents land and/or construction-in-progress on projects either held for future development or projects currently under development.
(G)	A portion or all of these properties includes commercial space (retail, parking and/or office space).
(H)	Total properties and units exclude four unconsolidated properties containing 1,669 apartment units and two Military Housing properties containing 5,113 units.
(I)	through (L) See Encumbrances Reconciliation schedule.
(M)	Boot property for Freddie Mac mortgage pool.
(N)	Boot Property for Bond Partnership mortgage pool.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	Due to the Company’s ability as general partner to control either through ownership or by contract the Operating Partnership and its subsidiaries, the Operating Partnership and each such subsidiary has been consolidated with the Company for financial reporting purposes, except for one unconsolidated development property, four unconsolidated operating properties and our military housing properties. The consolidated financial statements also include all variable interest entities for which the Company is the primary beneficiary.
	Noncontrolling interests represented by EQR's indirect 1% interest in various entities are immaterial and have not been accounted for in the Consolidated Financial Statements of the Operating Partnership. In addition, certain amounts due from EQR for its 1% interest in various entities have not been reflected in the consolidated balance sheets of the Operating Partnership since such amounts are immaterial.
Real Estate Assets And Depreciation Of Investment In Real Estate Policy Text Block	'
	Real Estate Assets and Depreciation of Investment in Real Estate
	Effective for business combinations on or after January 1, 2009, an acquiring entity is required to recognize all assets acquired and liabilities assumed in a transaction at the acquisition-date fair value with limited exceptions. In addition, an acquiring entity is required to expense acquisition-related costs as incurred, value noncontrolling interests at fair value at the acquisition date and expense restructuring costs associated with an acquired business.
	The Company allocates the purchase price of properties to net tangible and identified intangible assets acquired based on their fair values. In making estimates of fair values for purposes of allocating purchase price, the Company utilizes a number of sources, including independent appraisals that may be obtained in connection with the acquisition or financing of the respective property, our own analysis of recently acquired and existing comparable properties in our portfolio and other market data. The Company also considers information obtained about each property as a result of its pre-acquisition due diligence, marketing and leasing activities in estimating the fair value of the tangible and intangible assets/liabilities acquired. The Company allocates the purchase price of acquired real estate to various components as follows:
	•	Land – Based on actual purchase price adjusted to fair value (as necessary) if acquired separately or market research/comparables if acquired with an operating property.
	•	Furniture, Fixtures and Equipment – Ranges between $3,000 and $13,000 per apartment unit acquired as an estimate of the fair value of the appliances and fixtures inside an apartment unit. The per-apartment unit amount applied depends on the type of apartment building acquired. Depreciation is calculated on the straight-line method over an estimated useful life of five to ten years.
	•	Lease Intangibles – The Company considers the value of acquired in-place leases and above/below market leases and the amortization period is the average remaining term of each respective acquired lease. In-place residential leases' average term at acquisition approximates six months. See Note 4 for more information on above and below market leases.
	•	Other Intangible Assets – The Company considers whether it has acquired other intangible assets, including any customer relationship intangibles and the amortization period is the estimated useful life of the acquired intangible asset.
	•	Building – Based on the fair value determined on an “as-if vacant” basis. Depreciation is calculated on the straight-line method over an estimated useful life of thirty years.
	•	Site Improvements – Based on replacement cost, which approximates fair value. Depreciation is calculated on the straight-line method over an estimated useful life of eight years.
	•	Long-Term Debt – The Company calculates the fair value by discounting the remaining contractual cash flows on each instrument at the current market rate for those borrowings.
	Replacements inside an apartment unit such as appliances and carpeting are depreciated over an estimated useful life of five to ten years. Expenditures for ordinary maintenance and repairs are expensed to operations as incurred and significant renovations and improvements that improve and/or extend the useful life of the asset are capitalized over their estimated useful life, generally five to fifteen years. Initial direct leasing costs are expensed as incurred as such expense approximates the deferral and amortization of initial direct leasing costs over the lease terms. Property sales or dispositions are recorded when title transfers to unrelated third parties, contingencies have been removed and sufficient cash consideration has been received by the Company. Upon disposition, the related costs and accumulated depreciation are removed from the respective accounts. Any gain or loss on sale is recognized in accordance with accounting principles generally accepted in the United States.
	The Company classifies real estate assets as real estate held for disposition when it is certain a property will be disposed of (see further discussion below).
	The Company classifies properties under development and/or expansion and properties in the lease-up phase (including land) as construction-in-progress until construction has been completed and all certificates of occupancy permits have been obtained.
Impairment of Long-Lived Assets	'
	Impairment of Long-Lived Assets
	The Company periodically evaluates its long-lived assets, including its investments in real estate, for indicators of impairment. The judgments regarding the existence of impairment indicators are based on factors such as operational performance, market conditions and legal and environmental concerns, as well as the Company’s ability to hold and its intent with regard to each asset. Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted. If impairment indicators exist, the Company performs the following:
	▪	For long-lived assets to be held and used, the Company compares the expected future undiscounted cash flows for the long-lived asset against the carrying amount of that asset. If the sum of the estimated undiscounted cash flows is less than the carrying amount of the asset, the Company would record an impairment loss for the difference between the estimated fair value and the carrying amount of the asset.
	▪	For long-lived assets to be disposed of, an impairment loss is recognized when the estimated fair value of the asset, less the estimated cost to sell, is less than the carrying amount of the asset measured at the time that the Company has determined it will sell the asset. Long-lived assets held for disposition and the related liabilities are separately reported, with the long-lived assets reported at the lower of their carrying amounts or their estimated fair values, less their costs to sell, and are not depreciated after reclassification to real estate held for disposition.
Cost Capitalization	'
	Cost Capitalization
	See the Real Estate Assets and Depreciation of Investment in Real Estate section for a discussion of the Company’s policy with respect to capitalization vs. expensing of fixed asset/repair and maintenance costs. In addition, the Company capitalizes an allocation of the payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of major capital and/or renovation projects. These costs are reflected on the balance sheets as increases to depreciable property.
	For all development projects, the Company uses its professional judgment in determining whether such costs meet the criteria for capitalization or must be expensed as incurred. The Company capitalizes interest, real estate taxes and insurance and payroll and associated costs for those individuals directly responsible for and who spend their time on development activities, with capitalization ceasing no later than 90 days following issuance of the certificate of occupancy. These costs are reflected on the balance sheets as construction-in-progress for each specific property. The Company expenses as incurred all payroll costs of on-site employees working directly at our properties, except as noted above on our development properties prior to certificate of occupancy issuance and on specific major renovations at selected properties when additional incremental employees are hired.
	During the years ended December 31, 2013, 2012 and 2011, the Company capitalized $16.5 million, $14.3 million and $11.6 million, respectively, of payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of development activities as well as major capital and/or renovation projects.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company considers all demand deposits, money market accounts and investments in certificates of deposit and repurchase agreements purchased with a maturity of three months or less at the date of purchase to be cash equivalents. The Company maintains its cash and cash equivalents at financial institutions. The combined account balances at one or more institutions typically exceed the Federal Depository Insurance Corporation (“FDIC”) insurance coverage, and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes that the risk is not significant, as the Company does not anticipate the financial institutions’ non-performance.
Investment Securities	'
	Investment Securities
	Investment securities are included in other assets in the consolidated balance sheets. These securities are classified as held-to-maturity and carried at amortized cost if management has the positive intent and ability to hold the securities to maturity. Otherwise, the securities are classified as available-for-sale and carried at estimated fair value with unrealized gains and losses included in accumulated other comprehensive (loss), a separate component of shareholders’ equity/partners' capital. As of December 31, 2013, the Company did not hold any investment securities.
Deferred Financing Costs	'
	Deferred Financing Costs
	Deferred financing costs include fees and costs incurred to obtain the Company’s lines of credit and long-term financings. These costs are amortized over the terms of the related debt. Unamortized financing costs are written off when debt is retired before the maturity date. The accumulated amortization of such deferred financing costs was $33.4 million and $32.2 million at December 31, 2013 and 2012, respectively.
Fair Value of Financial Instruments, Including Derivative Instruments	'
	Fair Value of Financial Instruments, Including Derivative Instruments
	The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments. The Company, where possible, bases the fair values of its financial instruments, including its derivative instruments, on listed market prices and third party quotes. Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments.
	In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company seeks to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments. The Company may also use derivatives to manage its exposure to foreign exchange rates or manage commodity prices in the daily operations of the business.
	The Company has a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors. When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from these instruments nor does it anticipate any material adverse effect on its net income or financial position in the future from the use of derivatives it currently has in place.
	The Company recognizes all derivatives as either assets or liabilities in the consolidated balance sheets and measures those instruments at fair value. In addition, fair value adjustments will affect either shareholders’ equity/partners' capital or net income depending on whether the derivative instruments qualify as a hedge for accounting purposes and, if so, the nature of the hedging activity. When the terms of an underlying transaction are modified, or when the underlying transaction is terminated or completed, all changes in the fair value of the instrument are marked-to-market with changes in value included in net income each period until the instrument matures. Any derivative instrument used for risk management that does not meet the hedging criteria is marked-to-market each period. The Company does not use derivatives for trading or speculative purposes.
Revenue Recognition	'
	Revenue Recognition
	Rental income attributable to leases is recorded on a straight-line basis, which is not materially different than if it were recorded when due from residents and recognized monthly as it was earned. Leases entered into between a resident and a property for the rental of an apartment unit are generally year-to-year, renewable upon consent of both parties on an annual or monthly basis. Retail/commercial leases generally have five to ten year lease terms with market based renewal options. Fee and asset management revenue and interest income are recorded on an accrual basis.
Share-Based Compensation	'
	Share-Based Compensation
	The Company expenses share-based compensation such as restricted shares and share options. Any common share of beneficial interest, $0.01 par value per share (the "Common Shares") issued pursuant to EQR's incentive equity compensation and employee share purchase plans will result in ERPOP issuing units of limited partnership interest ("OP Units") to EQR on a one-for-one basis, with ERPOP receiving the net cash proceeds of such issuances.
	The fair value of the option grants are recognized over the requisite service/vesting period of the options. The fair value for the Company's share options was estimated at the time the share options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions:
			2013		2012	2011
	Expected volatility (1)		26.90%		27.40%	27.10%
	Expected life (2)		5 years		5 years	5 years
	Expected dividend yield (3)		4.12%		4.35%	4.56%
	Risk-free interest rate (4)		0.84%		0.71%	2.27%
	Option valuation per share		$7.90		$8.54	$8.36
	-1	Expected volatility – Estimated based on the historical ten-year volatility of EQR’s share price measured on a monthly basis.
	-2	Expected life – Approximates the actual weighted average life of all share options granted since the Company went public in 1993.
	-3	Expected dividend yield – Calculated by averaging the historical annual yield on EQR shares for a period matching the expected life of each grant, with the annual yield calculated by dividing actual dividends by the average price of EQR’s shares in a given year.
	-4	Risk-free interest rate – The most current U.S. Treasury rate available prior to the grant date for a period matching the expected life of each grant.
	The valuation method and assumptions are the same as those the Company used in accounting for option expense in its consolidated financial statements. The Black-Scholes option valuation model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. This model is only one method of valuing options. Because the Company’s share options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, the actual value of the options to the recipient may be significantly different.
Income and Other Taxes	'
	Income and Other Taxes
	Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level. Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes. The Company has elected Taxable REIT Subsidiary (“TRS”) status for certain of its corporate subsidiaries and as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses.
	Deferred tax assets and liabilities applicable to the TRS are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled. The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted. The Company’s deferred tax assets are generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities. As of December 31, 2013, the Company has recorded a deferred tax asset of approximately $79.6 million, which is fully offset by a valuation allowance due to the uncertainty in forecasting future TRS taxable income.
	The Company provided for income, franchise and excise taxes allocated as follows in the consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011 (amounts in thousands):
			Year Ended December 31,
			2013			2012		2011
	Income and other tax expense (benefit) (1)		$	1,169		$	514	$	706
	Discontinued operations, net (2)		449			34		(221		)
	Provision for income, franchise and excise taxes (3)		$	1,618		$	548	$	485
	-1	Primarily includes state and local income, excise and franchise taxes.
	-2	Primarily represents federal income taxes (recovered) on the gains on sales of land parcels and condominium units owned by a TRS and included in discontinued operations. Also represents state and local income, excise and franchise taxes on operating properties sold and included in discontinued operations.
	-3	All provisions for income tax amounts are current and none are deferred.
	The Company’s TRSs have approximately $63.1 million of NOL carryforwards available as of January 1, 2014 that will expire between 2028 and 2032.
	During the years ended December 31, 2013, 2012 and 2011, the Company’s tax treatment of dividends and distributions were as follows:
			Year Ended December 31,
			2013			2012		2011
	Tax treatment of dividends and distributions:
	Ordinary dividends		$	0.662		$	1.375	$	0.667
	Qualified dividends		0.05			—		—
	Long-term capital gain		0.87			0.253		0.629
	Unrecaptured section 1250 gain		0.268			0.152		0.284
	Dividends and distributions declared per
	Common Share/Unit outstanding		$	1.85		$	1.78	$	1.58
	The cost of land and depreciable property, net of accumulated depreciation, for federal income tax purposes as of December 31, 2013 and 2012 was approximately $15.2 billion and $11.2 billion, respectively.
Noncontrolling Interests	'
	Noncontrolling Interests
	A noncontrolling interest in a subsidiary (minority interest) is in most cases an ownership interest in the consolidated entity that should be reported as equity in the consolidated financial statements and separate from the parent company's equity. In addition, consolidated net income is required to be reported at amounts that include the amounts attributable to both the parent and the noncontrolling interest and the amount of consolidated net income attributable to the parent and the noncontrolling interest are required to be disclosed on the face of the consolidated statements of operations and comprehensive income. See Note 3 for further discussion.
	Operating Partnership: Net income is allocated to noncontrolling interests based on their respective ownership percentage of the Operating Partnership. The ownership percentage is calculated by dividing the number of OP Units held by the noncontrolling interests by the total OP Units held by the noncontrolling interests and EQR. Issuance of additional Common Shares and OP Units changes the ownership interests of both the noncontrolling interests and EQR. Such transactions and the related proceeds are treated as capital transactions.
	Partially Owned Properties: The Company reflects noncontrolling interests in partially owned properties on the balance sheet for the portion of properties consolidated by the Company that are not wholly owned by the Company. The earnings or losses from those properties attributable to the noncontrolling interests are reflected as noncontrolling interests in partially owned properties in the consolidated statements of operations and comprehensive income.
	Partners' Capital
	The "Limited Partners" of ERPOP include various individuals and entities that contributed their properties to ERPOP in exchange for OP Units. The "General Partner" of ERPOP is EQR. Net income is allocated to the Limited Partners based on their respective ownership percentage of the Operating Partnership. The ownership percentage is calculated by dividing the number of OP Units held by the Limited Partners by the total OP Units held by the Limited Partners and the General Partner. Issuance of additional Common Shares and OP Units changes the ownership interests of both the Limited Partners and EQR. Such transactions and the related proceeds are treated as capital transactions.
	Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners
	The Company classifies Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners in the mezzanine section of the consolidated balance sheets for the portion of OP Units that EQR is required, either by contract or securities law, to deliver registered Common Shares to the exchanging OP Unit holder. The redeemable noncontrolling interest units / redeemable limited partner units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. See Note 3 for further discussion.
Use of Estimates	'
	Use of Estimates
	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.
Reclassifications	'
	Reclassifications
	Certain reclassifications considered necessary for a fair presentation have been made to the prior period financial statements in order to conform to the current year presentation. These reclassifications have not changed the results of operations or equity/capital.
Other	'
	Other
	The Company is the controlling partner in various consolidated partnerships owning 19 properties and 3,752 apartment units and various completed and uncompleted development properties having a noncontrolling interest book value of $126.6 million at December 31, 2013. The Company is required to make certain disclosures regarding noncontrolling interests in consolidated limited-life subsidiaries. Of the consolidated entities described above, the Company is the controlling partner in limited-life partnerships owning six properties having a noncontrolling interest deficit balance of $9.8 million. These six partnership agreements contain provisions that require the partnerships to be liquidated through the sale of their assets upon reaching a date specified in each respective partnership agreement. The Company, as controlling partner, has an obligation to cause the property owning partnerships to distribute the proceeds of liquidation to the Noncontrolling Interests in these Partially Owned Properties only to the extent that the net proceeds received by the partnerships from the sale of their assets warrant a distribution based on the partnership agreements. As of December 31, 2013, the Company estimates the value of Noncontrolling Interest distributions for these six properties would have been approximately $51.2 million (“Settlement Value”) had the partnerships been liquidated. This Settlement Value is based on estimated third party consideration realized by the partnerships upon disposition of the six Partially Owned Properties and is net of all other assets and liabilities, including yield maintenance on the mortgages encumbering the properties, that would have been due on December 31, 2013 had those mortgages been prepaid. Due to, among other things, the inherent uncertainty in the sale of real estate assets, the amount of any potential distribution to the Noncontrolling Interests in the Company's Partially Owned Properties is subject to change. To the extent that the partnerships' underlying assets are worth less than the underlying liabilities, the Company has no obligation to remit any consideration to the Noncontrolling Interests in these Partially Owned Properties.
	Effective January 1, 2011, companies are required to separately disclose purchases, sales, issuances and settlements on a gross basis in the reconciliation of recurring Level 3 fair value measurements. This does not have a material effect on the Company’s consolidated results of operations or financial position. See Note 9 for further discussion.
	Effective January 1, 2012, companies are required to separately disclose the amounts and reasons for any transfers of assets and liabilities into and out of Level 1 and Level 2 of the fair value hierarchy. For fair value measurements using significant unobservable inputs (Level 3), companies are required to disclose quantitative information about the significant unobservable inputs used for all Level 3 measurements and a description of the Company's valuation processes in determining fair value. In addition, companies are required to provide a qualitative discussion about the sensitivity of recurring Level 3 measurements to changes in the unobservable inputs disclosed, including the interrelationship between inputs. Companies are also required to disclose information about when the current use of a non-financial asset measured at fair value differs from its highest and best use and the hierarchy classification for items whose fair value is not recorded on the balance sheet but is disclosed in the notes. This does not have a material effect on the Company's consolidated results of operations or financial position. See Notes 4 and 9 for further discussion.
	Effective January 1, 2013, companies are required to report, in one place, information about reclassifications out of accumulated other comprehensive income ("AOCI"). Companies are also required to report changes in AOCI balances. For significant items reclassified out of AOCI to net income in their entirety in the same reporting period, reporting is required about the effect of the reclassifications on the respective line items in the statement where net income is presented. For items that are not reclassified to net income in their entirety in the same reporting period, a cross reference to other disclosures currently required under US GAAP is required in the notes. This does not have a material effect on the Company's consolidated results of operations or financial position. See Note 9 for further discussion.
	Effective January 1, 2014, companies will be required to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount a company agreed to pay on the basis of its arrangement among its co-obligors and any additional amount a company expects to pay on behalf of its co-obligors. Companies will also be required to disclose the nature and amount of the obligation as well as other information about those obligations. The Company does not expect that this will have a material effect on its consolidated results of operations or financial position.
	Effective January 1, 2009, issuers of certain convertible debt instruments that may be settled in cash on conversion were required to separately account for the liability and equity components of the instrument in a manner that reflects each issuer's nonconvertible debt borrowing rate. As the Company was required to apply this retrospectively, the accounting for its $650.0 million 3.85% convertible unsecured notes that were issued in August 2006 with a final maturity in August 2026 was affected. On August 18, 2011, the Company redeemed these notes at par ($482.5 million was outstanding on August 18, 2011) and no premium was paid. The Company recognized $11.8 million in interest expense related to the stated coupon rate of 3.85% for the year ended December 31, 2011. The amount of the conversion option as of the date of issuance calculated by the Company using a 5.80% effective interest rate was $44.3 million and was amortized to interest expense over the expected life of the convertible notes (through the first put date on August 18, 2011). Total amortization of the cash discount and conversion option discount on the unsecured notes resulted in a reduction to earnings of approximately $5.0 million or $0.02 per share/Unit for the year ended December 31, 2011. In addition, the Company decreased the January 1, 2009 balance of retained earnings (included in general partner's capital in the Operating Partnership's financial statements) by $27.0 million, decreased the January 1, 2009 balance of notes by $17.3 million and increased the January 1, 2009 balance of paid in capital (included in general partner's capital in the Operating Partnership's financial statements) by $44.3 million.

Business_Tables

Business (Tables)	12 Months Ended
	Dec. 31, 2013
Business [Abstract]	'
Property/Unit schedule	'
	The ownership breakdown includes (table does not include various uncompleted development properties):
		Properties	Apartment Units
	Wholly Owned Properties	362	98,468
	Master-Leased Properties – Consolidated	3	853
	Partially Owned Properties – Consolidated	19	3,752
	Partially Owned Properties – Unconsolidated	4	1,669
	Military Housing	2	5,113
		390	109,855

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract]	'
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Table Text Block]	'
	The fair value for the Company's share options was estimated at the time the share options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions:
			2013		2012	2011
	Expected volatility (1)		26.90%		27.40%	27.10%
	Expected life (2)		5 years		5 years	5 years
	Expected dividend yield (3)		4.12%		4.35%	4.56%
	Risk-free interest rate (4)		0.84%		0.71%	2.27%
	Option valuation per share		$7.90		$8.54	$8.36
	-1	Expected volatility – Estimated based on the historical ten-year volatility of EQR’s share price measured on a monthly basis.
	-2	Expected life – Approximates the actual weighted average life of all share options granted since the Company went public in 1993.
	-3	Expected dividend yield – Calculated by averaging the historical annual yield on EQR shares for a period matching the expected life of each grant, with the annual yield calculated by dividing actual dividends by the average price of EQR’s shares in a given year.
	-4	Risk-free interest rate – The most current U.S. Treasury rate available prior to the grant date for a period matching the expected life of each grant.
Allocation Of Income Franchise And Excise Taxes In Consolidated Statements Of Operations [Table Text Block]	'
	The Company provided for income, franchise and excise taxes allocated as follows in the consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011 (amounts in thousands):
			Year Ended December 31,
			2013			2012		2011
	Income and other tax expense (benefit) (1)		$	1,169		$	514	$	706
	Discontinued operations, net (2)		449			34		(221		)
	Provision for income, franchise and excise taxes (3)		$	1,618		$	548	$	485
	-1	Primarily includes state and local income, excise and franchise taxes.
	-2	Primarily represents federal income taxes (recovered) on the gains on sales of land parcels and condominium units owned by a TRS and included in discontinued operations. Also represents state and local income, excise and franchise taxes on operating properties sold and included in discontinued operations.
	-3	All provisions for income tax amounts are current and none are deferred.
Tax Treatment Of Dividends And Distributions [Table Text Block]	'
	During the years ended December 31, 2013, 2012 and 2011, the Company’s tax treatment of dividends and distributions were as follows:
			Year Ended December 31,
			2013			2012		2011
	Tax treatment of dividends and distributions:
	Ordinary dividends		$	0.662		$	1.375	$	0.667
	Qualified dividends		0.05			—		—
	Long-term capital gain		0.87			0.253		0.629
	Unrecaptured section 1250 gain		0.268			0.152		0.284
	Dividends and distributions declared per
	Common Share/Unit outstanding		$	1.85		$	1.78	$	1.58

Equity_Capital_and_Other_Inter1

Equity, Capital and Other Interests (Tables)	12 Months Ended
	Dec. 31, 2013
Common shares and units rollforward	'
	The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and Long-Term Incentive Plan (“LTIP”) Units) for the years ended December 31, 2013, 2012 and 2011:
		2013			2012				2011
	Common Shares
	Common Shares outstanding at January 1,	325,054,654			297,508,185				290,197,242
	Common Shares Issued:
	Conversion of OP Units	67,939			675,817				341,594
	Issuance of Common Shares	34,468,085			25,023,919				3,866,666
	Exercise of share options	586,017			1,608,427				2,945,948
	Employee Share Purchase Plan (ESPP)	73,468			110,054				113,107
	Restricted share grants, net	229,097			128,252				145,616
	Common Shares Other:
	Conversion of restricted shares to LTIP Units	—			—				(101,988	)
	Common Shares outstanding at December 31,	360,479,260			325,054,654				297,508,185
	Units
	Units outstanding at January 1,	13,968,758			13,492,543				13,612,037
	LTIP Units, net	279,557			70,235				120,112
	OP Units issued through acquisitions	—			1,081,797				—
	Conversion of restricted shares to LTIP Units	—			—				101,988
	Conversion of OP Units to Common Shares	(67,939	)		(675,817		)		(341,594	)
	Units outstanding at December 31,	14,180,376			13,968,758				13,492,543
	Total Common Shares and Units outstanding at December 31,	374,659,636			339,023,412				311,000,728
	Units Ownership Interest in Operating Partnership	3.8	%		4.1		%		4.3	%
	OP Units Issued:
	Acquisitions – per unit	—				$61.57			—
	Acquisitions – valuation	—			$66.6 million				—
Redeemable Noncontrolling Interest [Table Text Block]	'
	The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
		2013				2012				2011
	Balance at January 1,	$	398,372			$	416,404			$	383,540
	Change in market value	(79,667		)		(38,734		)		22,714
	Change in carrying value	44,439				20,702				10,150
	Balance at December 31,	$	363,144			$	398,372			$	416,404
Schedule Of Preferred Stock [Table Text Block]	'
	The following table presents the Company’s issued and outstanding Preferred Shares as of December 31, 2013 and 2012:
								Amounts in thousands
		Redemption		Annual				December 31, 2013				31-Dec-12
		Date (1)		Dividend per
				Share (2)
	Preferred Shares of beneficial interest, $0.01 par value;
	100,000,000 shares authorized:
	8.29% Series K Cumulative Redeemable Preferred; liquidation	12/10/26			$4.14			$	50,000			$	50,000
	value $50 per share; 1,000,000 shares issued and outstanding
	at December 31, 2013 and December 31, 2012
								$	50,000			$	50,000
Limited Partner [Member]	'
Common shares and units rollforward	'
	The following tables present the changes in the Operating Partnership's issued and outstanding Units and in the limited partners' Units for the years ended December 31, 2013, 2012 and 2011:
		2013			2012				2011
	General and Limited Partner Units
	General and Limited Partner Units outstanding at January 1,	339,023,412			311,000,728				303,809,279
	Issued to General Partner:
	Issuance of OP Units	34,468,085			25,023,919				3,866,666
	Exercise of EQR share options	586,017			1,608,427				2,945,948
	EQR's Employee Share Purchase Plan (ESPP)	73,468			110,054				113,107
	EQR's restricted share grants, net	229,097			128,252				145,616
	Issued to Limited Partners:
	LTIP Units, net	279,557			70,235				120,112
	OP Units issued through acquisitions	—			1,081,797				—
	General and Limited Partner Units outstanding at December 31,	374,659,636			339,023,412				311,000,728
	Limited Partner Units
	Limited Partner Units outstanding at January 1,	13,968,758			13,492,543				13,612,037
	Limited Partner LTIP Units, net	279,557			70,235				120,112
	Limited Partner OP Units issued through acquisitions	—			1,081,797				—
	Conversion of EQR restricted shares to LTIP Units	—			—				101,988
	Conversion of Limited Partner OP Units to EQR Common Shares	(67,939	)		(675,817		)		(341,594	)
	Limited Partner Units outstanding at December 31,	14,180,376			13,968,758				13,492,543
	Limited Partner Units Ownership Interest in Operating Partnership	3.8	%		4.1		%		4.3	%
	Limited Partner OP Units Issued:
	Acquisitions – per unit	—				$61.57			—
	Acquisitions – valuation	—			$66.6 million				—
Redeemable Noncontrolling Interest [Table Text Block]	'
	The following table presents the changes in the redemption value of the Redeemable Limited Partners for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
		2013				2012				2011
	Balance at January 1,	$	398,372			$	416,404			$	383,540
	Change in market value	(79,667		)		(38,734		)		22,714
	Change in carrying value	44,439				20,702				10,150
	Balance at December 31,	$	363,144			$	398,372			$	416,404
Schedule Of Preferred Stock [Table Text Block]	'
	The following table presents the Operating Partnership's issued and outstanding “Preference Units” as of December 31, 2013 and 2012:
								Amounts in thousands
		Redemption		Annual				December 31, 2013				31-Dec-12
		Date (1)		Dividend per
				Unit (2)
	Preference Units:
	8.29% Series K Cumulative Redeemable Preference Units;	12/10/26			$4.14			$	50,000			$	50,000
	liquidation value $50 per unit; 1,000,000 units issued and
	outstanding at December 31, 2013 and December 31, 2012
								$	50,000			$	50,000

Real_Estate_Tables

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2013
Schedule Of Real Estate Investments And Accumulated Depreciation [Table Text Block]	'
	The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of December 31, 2013 and 2012 (amounts in thousands):
		2013				2012
	Land	$	6,192,512			$	4,554,912
	Depreciable property:
	Buildings and improvements	17,509,609				14,135,740
	Furniture, fixtures and equipment	1,214,220				1,343,765
	In-Place lease intangibles	502,218				232,439
	Projects under development:
	Land	353,574				210,632
	Construction-in-progress	635,293				177,118
	Land held for development:
	Land	341,389				294,868
	Construction-in-progress	52,133				58,955
	Investment in real estate	26,800,948				21,008,429
	Accumulated depreciation	(4,807,709		)		(4,912,221		)
	Investment in real estate, net	$	21,993,239			$	16,096,208
Schedule of Finite-Lived Intangible Assets [Table Text Block]	'
	The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of December 31, 2013 (amounts in thousands):
	Description	Balance Sheet Location		Value
	Assets
	Ground lease intangibles – below market	Other Assets		$	178,251
	Retail lease intangibles – above market	Other Assets		1,260
	Lease intangible assets			179,511
	Accumulated amortization			(4,364		)
	Lease intangible assets, net			$	175,147
	Liabilities
	Ground lease intangibles – above market	Other Liabilities		$	2,400
	Retail lease intangibles – below market	Other Liabilities		5,500
	Lease intangible liabilities			7,900
	Accumulated amortization			(1,161		)
	Lease intangible liabilities, net			$	6,739
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	'
	The following table provides a summary of the aggregate amortization expense for above and below market ground lease intangibles and retail lease intangibles for each of the next five years (amounts in thousands):
		2014				2015				2016			2017			2018
	Ground lease intangibles	$	4,321			$	4,321			$	4,321		$	4,321		$	4,321
	Retail lease intangibles	(1,010		)		(1,016		)		(908		)	(540		)	(71		)
	Total	$	3,311			$	3,305			$	3,413		$	3,781		$	4,250
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	The following table summarizes the acquisition date fair values of the assets acquired and liabilities assumed, which the Company determined using Level 1, Level 2 and Level 3 inputs (amounts in thousands):
	Land	$	2,239,000
	Depreciable property:
	Buildings and improvements	5,805,467
	Furniture, fixtures and equipment	61,470
	In-Place lease intangibles	304,830
	Projects under development	36,583
	Land held for development	244,097
	Investments in unconsolidated entities	196,615
	Other assets	195,260
	Other liabilities	(112,107		)
	Net assets acquired	$	8,971,215
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	'
	The following table summarizes the acquisition date fair values of the above and below market ground and retail lease intangibles, which we determined using Level 2 and Level 3 inputs (amounts in thousands):
	Description	Balance Sheet Location		Fair Value
	Ground lease intangibles – below market	Other Assets		$	178,251
	Retail lease intangibles – above market	Other Assets		1,260
	Ground lease intangibles – above market	Other Liabilities		2,400
	Retail lease intangibles – below market	Other Liabilities		8,040
Business Acquisition, Pro Forma Information [Table Text Block]	'
	The following table illustrates the effect on net income, earnings per share – basic and earnings per share – diluted as if the Company had consummated the Archstone Acquisition as of January 1, 2012:
		Year Ended December 31,
		2013				2012
		(Amounts in thousands, except per share amounts)
	Total revenues	$	2,485,438			$	2,317,699
	Income (loss) from continuing operations (1)	203,286				(54,940		)
	Discontinued operations, net	2,074,072				720,361
	Net income	2,277,358				665,421
	Net income available to Common Shares	2,183,756				622,424
	Earnings per share - basic:
	Net income available to Common Shares	$	6.07			$	1.74
	Weighted average Common Shares outstanding (2)	359,688				356,984
	Earnings per share - diluted (1):
	Net income available to Common Shares	$	6.05			$	1.74
	Weighted average Common Shares outstanding (2)	375,861				356,984
Acquired Properties Table	'
	In addition to the Archstone Acquisition described above, during the year ended December 31, 2013, the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands):
		Properties			Apartment Units			Purchase Price
	Rental Properties – Consolidated	1			322			$	91,500
	Land Parcel (one)	—			—			16,500
	Total	1			322			$	108,000
	During the year ended December 31, 2012, the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands):
		Properties			Apartment Units			Purchase Price
	Rental Properties – Consolidated	9			1,896			$	906,305
	Land Parcel (six)	—			—			141,240
	Total	9			1,896			$	1,047,545
Disposed Properties Table	'
	During the year ended December 31, 2013, the Company disposed of the following to unaffiliated parties (sales price in thousands):
		Properties			Apartment Units			Sales Price
	Consolidated:
	Rental Properties	94			29,180			$	4,459,339
	Land Parcels (seven)	—			—			99,650
	Other (1)	—			—			30,734
	Unconsolidated:
	Land Parcel (one) (2)	—			—			26,350
	Total	94			29,180			$	4,616,073
	(1) Represents a 97,000 square foot commercial building adjacent to our Harbor Steps apartment property in downtown Seattle that was acquired in 2011.
	(2) Sales price listed is the gross sales price. EQR's share of the net sales proceeds approximated 25%.
	The Company recognized a net gain on sales of discontinued operations of approximately $2.0 billion and a net gain on sales of land parcels of approximately $12.2 million on the above sales.
	During the year ended December 31, 2012, the Company disposed of the following to unaffiliated parties (sales price in thousands):
		Properties			Apartment Units			Sales Price
	Rental Properties – Consolidated	35			9,012			$	1,061,334
	Total	35			9,012			$	1,061,334
	The Company recognized a net gain on sales of discontinued operations of approximately $548.3 million on the above sales.
Partnership Interest [Member]	'
Business Acquisition, Pro Forma Information [Table Text Block]	'
	The following table illustrates the effect on net income, earnings per Unit – basic and earnings per Unit – diluted as if the Operating Partnership had consummated the Archstone Acquisition as of January 1, 2012:
		Year Ended December 31,
		2013				2012
		(Amounts in thousands, except per Unit amounts)
	Total revenues	$	2,485,438			$	2,317,699
	Income (loss) from continuing operations (1)	203,286				(54,940		)
	Discontinued operations, net	2,074,072				720,361
	Net income	2,277,358				665,421
	Net income available to Units	2,273,798				651,548
	Earnings per Unit - basic:
	Net income available to Units	$	6.07			$	1.74
	Weighted average Units outstanding (2)	373,421				370,837
	Earnings per Unit - diluted (1):
	Net income available to Units	$	6.05			$	1.74
	Weighted average Units outstanding (2)	375,861				370,837

Commitments_to_AcquireDispose_1

Commitments to Acquire/Dispose of Real Estate (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments to Acquire Dispose of Real Estate [Abstract]	'
Real Estate to be Acquired Table Text Block	'
	In addition to the property that was subsequently acquired as discussed in Note 18, the Company has entered into a separate agreement to acquire the following (purchase price in thousands):
		Properties	Apartment Units	Purchase Price
	Land Parcel (one)	—	—	$	10,290
	Total	—	—	$	10,290
Disposed Properties Table Text Block	'
	The Company has entered into a separate agreement to dispose of the following (sales price in thousands):
		Properties	Apartment Units	Purchase Price
	Land Parcel (one)	—	—	$	40,300
	Total	—	—	$	40,300

Investments_in_Partially_Owned1

Investments in Partially Owned Entities (Tables)	12 Months Ended
	Dec. 31, 2013
Investments in Partially Owned Entities [Abstract]	'
Partially Owned Property Balance Sheet Schedule [Table Text Block]	'
	The following tables and information summarize the Company’s investments in partially owned entities as of December 31, 2013 (amounts in thousands except for project and apartment unit amounts):
		Consolidated									Unconsolidated
		Development Projects									Development Projects
		Held for			Operating			Total			Held for			Completed, Not Stabilized (3)			Operating			Total
		and/or Under									and/or Under
		Development									Development
	Total projects (1)	—			19			19			—			3			1			4
	Total apartment units (1)	—			3,752			3,752			—			1,333			336			1,669
	Balance sheet information at 12/31/13 (at 100%):
	ASSETS
	Investment in real estate	$	342,222		$	673,957		$	1,016,179		$	45,123		$	284,264		$	55,545		$	384,932
	Accumulated depreciation	—			(172,802		)	(172,802		)	—			(1,887		)	(4,605		)	(6,492		)
	Investment in real estate, net	342,222			501,155			843,377			45,123			282,377			50,940			378,440
	Cash and cash equivalents	4,704			22,792			27,496			262			1,505			1,377			3,144
	Investments in unconsolidated entities	—			54,439			54,439			—			—			—			—
	Deposits – restricted	43,654			220			43,874			—			95			47			142
	Deferred financing costs, net	—			2,496			2,496			77			129			4			210
	Other assets	5,841			26,899			32,740			—			355			871			1,226
	Total assets	$	396,421		$	608,001		$	1,004,422		$	45,462		$	284,461		$	53,239		$	383,162
	LIABILITIES AND EQUITY/CAPITAL
	Mortgage notes payable (2)	$	—		$	360,130		$	360,130		$	11,379		$	172,279		$	30,550		$	214,208
	Accounts payable & accrued expenses	21,569			1,113			22,682			4,433			3,844			164			8,441
	Accrued interest payable	—			1,283			1,283			23			693			—			716
	Other liabilities	1,157			1,487			2,644			339			572			768			1,679
	Security deposits	10			1,828			1,838			—			222			105			327
	Total liabilities	22,736			365,841			388,577			16,174			177,610			31,587			225,371
	Noncontrolling Interests – Partially Owned	114,245			12,338			126,583			27,858			73,902			20,450			122,210
	Properties/Partners' equity
	Company equity/General and Limited	259,440			229,822			489,262			1,430			32,949			1,202			35,581
	Partners' Capital
	Total equity/capital	373,685			242,160			615,845			29,288			106,851			21,652			157,791
	Total liabilities and equity/capital	$	396,421		$	608,001		$	1,004,422		$	45,462		$	284,461		$	53,239		$	383,162
Partially Owned Property Income Statement Schedule [Table Text Block]	'
		Consolidated									Unconsolidated
		Development Projects									Development Projects
		Held for									Held for						Operating
		and/or Under									and/or Under			Completed, Not Stabilized (3)
		Development			Operating			Total			Development									Total
	Operating information for the year ended 12/31/13 (at 100%):
	Operating revenue	$	231		$	80,968		$	81,199		$	—		$	6,629		$	4,597		$	11,226
	Operating expenses	741			24,888			25,629			135			3,554			1,949			5,638
	Net operating (loss) income	(510		)	56,080			55,570			(135		)	3,075			2,648			5,588
	Depreciation	—			31,824			31,824			—			1,887			4,605			6,492
	General and administrative/other	882			93			975			—			53			201			254
	Operating (loss) income	(1,392		)	24,163			22,771			(135		)	1,135			(2,158		)	(1,158		)
	Interest and other income	2			3			5			—			—			10			10
	Other expenses	(503		)	(5		)	(508		)	—			—			—			—
	Interest:
	Expense incurred, net	(2		)	(14,561		)	(14,563		)	—			(1,886		)	(941		)	(2,827		)
	Amortization of deferred financing costs	—			(301		)	(301		)	—			—			(1		)	(1		)
	(Loss) income before income and other taxes, (loss)	(1,895		)	9,299			7,404			(135		)	(751		)	(3,090		)	(3,976		)
	from investments in unconsolidated entities, net
	(loss) gain on sales of land parcels and
	discontinued operations
	Income and other tax (expense) benefit	(11		)	(56		)	(67		)	—			—			—			—
	(Loss) from investments in unconsolidated entities	—			(1,387		)	(1,387		)	—			—			—			—
	Net (loss) on sales of land parcels	(17		)	—			(17		)	—			—			—			—
	Net gain on sales of discontinued operations	—			26,673			26,673			—			—			—			—
	Net (loss) income	$	(1,923	)	$	34,529		$	32,606		$	(135	)	$	(751	)	$	(3,090	)	$	(3,976	)
	-1	Project and apartment unit counts exclude all uncompleted development projects until those projects are substantially completed.
	-2	All debt is non-recourse to the Company with the exception of 50% of the current $11.4 million outstanding debt balance on one unconsolidated development project.
	-3	Projects included here are substantially complete. However, they may still require additional exterior and interior work for all units to be available for leasing.
	Note:	The above tables exclude the Company's interests in unconsolidated joint ventures entered into with AVB in connection with the Archstone Transaction. These ventures own certain non-core Archstone assets that are held for sale and succeeded to certain residual Archstone liabilities, such as liability for various employment-related matters as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries. The preferred interests have an aggregate liquidation value of $89.0 million at December 31, 2013. The ventures are owned 60% by the Company and 40% by AVB.

Deposits_Restricted_Tables

Deposits - Restricted (Tables)	12 Months Ended
	Dec. 31, 2013
Deposits - Restricted [Abstract]	'
Schedule of Restricted Cash and Cash Equivalents [Table Text Block]	'
	The following table presents the Company’s restricted deposits as of December 31, 2013 and 2012 (amounts in thousands):
		December 31, 2013		December 31, 2012
	Tax – deferred (1031) exchange proceeds	$	—	$	152,182
	Earnest money on pending acquisitions	4,514		5,613
	Restricted deposits on real estate investments	53,771		44,209
	Resident security and utility deposits	44,777		44,199
	Other	505		4,239
	Totals	$	103,567	$	250,442

Debt_Debt_Tables

Debt Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Debt [Abstract]	'
Schedule of Long-term Debt Instruments [Table Text Block]	'
	The following tables summarize the Company’s unsecured note balances and certain interest rate and maturity date information as of and for the years ended December 31, 2013 and 2012, respectively:
	31-Dec-13		Net Principal Balance				Interest Rate Ranges	Weighted Average Interest Rate	Maturity Date Ranges
	(Amounts are in thousands)
	Fixed Rate Public/Private Notes (1)		$	4,727,088			3.00% - 7.57%	5.55%	2014 - 2026
	Floating Rate Public/Private Notes (1)		750,000				(1) (2)	1.58%	2015
	Totals		$	5,477,088
	31-Dec-12		Net Principal Balance				Interest Rate Ranges	Weighted Average Interest Rate	Maturity Date Ranges
	(Amounts are in thousands)
	Fixed Rate Public/Private Notes (1)		$	4,329,352			4.625% - 7.57%	5.70%	2013 - 2026
	Floating Rate Public/Private Notes (1)		301,523				-1	1.83%	2013
	Totals		$	4,630,875
	-1	At December 31, 2012, $300.0 million in fair value interest rate swaps converts a portion of the $400.0 million face value 5.200% notes due April 1, 2013 to a floating interest rate. On April 1, 2013, the Company paid off the $400.0 million outstanding of its 5.200%  public notes at maturity and the related fair value interest rate swaps matured.
	-2	Includes the Company's senior unsecured $750.0 million delayed draw term loan facility that matures on January 11, 2015 and is subject to a one-year extension option exercisable by the Company. The interest rate on advances under the term loan facility will generally be LIBOR plus a spread (currently 1.20%), which is dependent on the credit rating of the Company's long-term debt.
Aggregate payments of principal on unsecured notes payable	'
	The following table provides a summary of the aggregate payments of principal on all debt for each of the next five years and thereafter (amounts in thousands):
	Year			Total (1)
	2014			$	561,084
	2015			1,170,448
	2016			1,193,251
	2017			1,347,191
	2018	—		297,016
	Thereafter			6,209,697
	Net Unamortized (Discount)			(12,433		)
	Total			$	10,766,254
	-1	Premiums and discounts are amortized over the life of the debt.

Derivative_and_Other_Fair_Valu1

Derivative and Other Fair Value Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Derivative Instrument Table	'
	The following table summarizes the Company’s consolidated derivative instruments at December 31, 2013 (dollar amounts are in thousands):
		Forward
		Starting
		Swaps (1)
	Current Notional Balance	$	400,000
	Lowest Possible Notional	$	400,000
	Highest Possible Notional	$	400,000
	Lowest Interest Rate	2.125		%
	Highest Interest Rate	3.23		%
	Earliest Maturity Date	2024
	Latest Maturity Date	2024
	-1	Forward Starting Swaps – Designed to partially fix the interest rate in advance of a planned future debt issuance. These swaps have mandatory counterparty terminations in 2015, and are targeted to 2014 issuances.
Schedule of Location and Amount of Financial Instruments on Balanace Sheet	'
	The following tables provide a summary of the fair value measurements for each major category of assets and liabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at December 31, 2013 and 2012, respectively (amounts in thousands):
								Fair Value Measurements at Reporting Date Using
								Quoted Prices in
								Active Markets for			Significant Other				Significant
			Balance Sheet					Identical Assets/Liabilities			Observable Inputs				Unobservable Inputs
	Description		Location		12/31/13			(Level 1)			(Level 2)				(Level 3)
	Assets
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps		Other Assets		$	18,712		$	—		$	18,712			$	—
	Supplemental Executive Retirement Plan		Other Assets		83,845			83,845			—				—
	Total				$	102,557		$	83,845		$	18,712			$	—
	Liabilities
	Supplemental Executive Retirement Plan		Other Liabilities		$	83,845		$	83,845		$	—			$	—
	Total				$	83,845		$	83,845		$	—			$	—
	Redeemable Noncontrolling Interests –
	Operating Partnership/Redeemable
	Limited Partners		Mezzanine		$	363,144		$	—		$	363,144			$	—
								Fair Value Measurements at Reporting Date Using
								Quoted Prices in
								Active Markets for			Significant Other				Significant
			Balance Sheet					Identical Assets/Liabilities			Observable Inputs				Unobservable Inputs
	Description		Location		12/31/12			(Level 1)			(Level 2)				(Level 3)
	Assets
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Fair Value Hedges		Other Assets		$	1,523		$	—		$	1,523			$	—
	Supplemental Executive Retirement Plan		Other Assets		70,655			70,655			—				—
	Available-for-Sale Investment Securities		Other Assets		2,214			2,214			—				—
	Total				$	74,392		$	72,869		$	1,523			$	—
	Liabilities
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps		Other Liabilities		$	44,050		$	—		$	44,050			$	—
	Supplemental Executive Retirement Plan		Other Liabilities		70,655			70,655			—				—
	Total				$	114,705		$	70,655		$	44,050			$	—
	Redeemable Noncontrolling Interests –
	Operating Partnership/Redeemable
	Limited Partners		Mezzanine		$	398,372		$	—		$	398,372			$	—
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]	'
	The following tables provide a summary of the effect of fair value hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
	December 31, 2013		Location of Gain/(Loss) Recognized in Income		Amount of Gain/(Loss) Recognized in Income					Income Statement Location of Hedged	Amount of Gain/(Loss)Recognized in Income
	Type of Fair Value Hedge		on Derivative		on Derivative			Hedged Item		Item Gain/(Loss)	on Hedged Item
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Interest Rate Swaps		Interest expense		$	(1,523	)	Fixed rate debt		Interest expense	$	1,523
	Total				$	(1,523	)				$	1,523
	December 31, 2012		Location of Gain/(Loss) Recognized in Income		Amount of Gain/(Loss) Recognized in Income					Income Statement Location of Hedged	Amount of Gain/(Loss)Recognized in Income
	Type of Fair Value Hedge		on Derivative		on Derivative			Hedged Item		Item Gain/(Loss)	on Hedged Item
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Interest Rate Swaps		Interest expense		$	(7,448	)	Fixed rate debt		Interest expense	$	7,448
	Total				$	(7,448	)				$	7,448
	December 31, 2011		Location of Gain/(Loss) Recognized in Income		Amount of Gain/(Loss) Recognized in Income					Income Statement Location of Hedged	Amount of Gain/(Loss)Recognized in Income
	Type of Fair Value Hedge		on Derivative		on Derivative			Hedged Item		Item Gain/(Loss)	on Hedged Item
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Interest Rate Swaps		Interest expense		$	(3,549	)	Fixed rate debt		Interest expense	$	3,549
	Total				$	(3,549	)				$	3,549
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	'
	The following tables provide a summary of the effect of cash flow hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
			Effective Portion								Ineffective Portion
	December 31, 2013		Amount of				Location of Gain/(Loss)	Amount of Gain/(Loss)			Location of		Amount of Gain/(Loss)
			Gain/(Loss) Recognized in OCI				Reclassified from Accumulated OCI	Reclassified from Accumulated OCI			Gain/(Loss) Recognized in Income		Reclassified from Accumulated OCI
	Type of Cash Flow Hedge		on Derivative				into Income	into Income			on Derivative		into Income
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps/Treasury Locks		$	18,771			Interest expense	$	(20,141	)	N/A		$	—
	Total		$	18,771				$	(20,141	)			$	—
			Effective Portion								Ineffective Portion
	December 31, 2012		Amount of				Location of Gain/(Loss)	Amount of Gain/(Loss)			Location of		Amount of Gain/(Loss)
			Gain/(Loss) Recognized in OCI				Reclassified from Accumulated	Reclassified from Accumulated			Gain/(Loss) Recognized in Income		Reclassified from Accumulated
			on Derivative				OCI	OCI			on Derivative		OCI
	Type of Cash Flow Hedge						into Income	into Income					into Income
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps/Treasury Locks		$	(11,772	)		Interest expense	$	(14,678	)	N/A		$	—
	Total		$	(11,772	)			$	(14,678	)			$	—
			Effective Portion								Ineffective Portion
	December 31, 2011		Amount of				Location of Gain/(Loss)	Amount of Gain/(Loss)			Location of		Amount of Gain/(Loss)
			Gain/(Loss) Recognized in OCI				Reclassified from Accumulated	Reclassified from Accumulated			Gain/(Loss) Recognized in Income		Reclassified from Accumulated
			on Derivative				OCI	OCI			on Derivative		OCI
	Type of Cash Flow Hedge						into Income	into Income					into Income
	Derivatives designated as hedging instruments:
	Interest Rate Contracts:
	Forward Starting Swaps/Treasury Locks		$	(145,090	)		Interest expense	$	(4,343	)	Interest expense		$	(170	)
	Development Interest Rate Swaps/Caps		1,322				Interest expense	—			N/A		—
	Total		$	(143,768	)			$	(4,343	)			$	(170	)
Available-for-sale Securities [Table Text Block]	'
	The following tables set forth the maturity, amortized cost, gross unrealized gains and losses, book/fair value and interest and other income of the various investment securities held as of December 31, 2013 and 2012, respectively (amounts in thousands):
					Other Assets
	December 31, 2013		Maturity		Amortized			Unrealized			Unrealized				Book/		Interest and
	Security				Cost			Gains			Losses				Fair Value		Other Income
	Available-for-Sale Investment Securities		N/A		$	—		$	—		$	—			$	—	$	2,122
	Total				$	—		$	—		$	—			$	—	$	2,122
					Other Assets
	December 31, 2012		Maturity		Amortized			Unrealized			Unrealized				Book/		Interest and
	Security				Cost			Gains			Losses				Fair Value		Other Income
	Available-for-Sale Investment Securities		N/A		$	675		$	1,539		$	—			$	2,214	$	—
	Total				$	675		$	1,539		$	—			$	2,214	$	—

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	'
	The following tables set forth the computation of net income per share – basic and net income per share – diluted for the Company (amounts in thousands except per share amounts):
		Year Ended December 31,
		2013			2012			2011
	Numerator for net income per share – basic:
	(Loss) income from continuing operations	$	(168,174	)	$	160,298		$	(72,941	)
	Allocation to Noncontrolling Interests – Operating Partnership, net	6,834			(6,417		)	3,880
	Net loss (income) attributable to Noncontrolling Interests – Partially Owned Properties	538			(844		)	(832		)
	Preferred distributions	(4,145		)	(10,355		)	(13,865		)
	Premium on redemption of Preferred Shares	—			(5,152		)	—
	(Loss) income from continuing operations available to Common Shares, net of	(164,947		)	137,530			(83,758		)
	Noncontrolling Interests
	Discontinued operations, net of Noncontrolling Interests	1,991,415			688,682			963,478
	Numerator for net income per share – basic	$	1,826,468		$	826,212		$	879,720
	Numerator for net income per share – diluted (1):
	Income from continuing operations				$	160,298
	Net (income) attributable to Noncontrolling Interests – Partially Owned Properties				(844		)
	Preferred distributions				(10,355		)
	Premium on redemption of Preferred Shares				(5,152		)
	Income from continuing operations available to Common Shares				143,947
	Discontinued operations, net				720,906
	Numerator for net income per share – diluted (1)	$	1,826,468		$	864,853		$	879,720
	Denominator for net income per share – basic and diluted (1):
	Denominator for net income per share – basic	354,305			302,701			294,856
	Effect of dilutive securities:
	OP Units				13,853
	Long-term compensation shares/units				3,212
	Denominator for net income per share – diluted (1)	354,305			319,766			294,856
	Net income per share – basic	$	5.16		$	2.73		$	2.98
	Net income per share – diluted	$	5.16		$	2.7		$	2.98
	Net income per share – basic:
	(Loss) income from continuing operations available to Common Shares, net of	$	(0.466	)	$	0.454		$	(0.284	)
	Noncontrolling Interests
	Discontinued operations, net of Noncontrolling Interests	5.621			2.275			3.268
	Net income per share – basic	$	5.155		$	2.729		$	2.984
	Net income per share – diluted (1):
	(Loss) income from continuing operations available to Common Shares	$	(0.466	)	$	0.45		$	(0.284	)
	Discontinued operations, net	5.621			2.255			3.268
	Net income per share – diluted	$	5.155		$	2.705		$	2.984
	Distributions declared per Common Share outstanding	$	1.85		$	1.78		$	1.58
	-1	Potential common shares issuable from the assumed conversion of OP Units and the exercise/vesting of long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per share calculation as the Company had a loss from continuing operations for the years ended December 31, 2013 and 2011.
Operating Partnership [Member]	'
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	'
	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):
		Year Ended December 31,
		2013			2012			2011
	Numerator for net income per Unit – basic and diluted (1):
	(Loss) income from continuing operations	$	(168,174	)	$	160,298		$	(72,941	)
	Net loss (income) attributable to Noncontrolling Interests – Partially Owned Properties	538			(844		)	(832		)
	Allocation to Preference Units	(4,145		)	(10,355		)	(13,865		)
	Allocation to premium on redemption of Preference Units	—			(5,152		)	—
	(Loss) income from continuing operations available to Units	(171,781		)	143,947			(87,638		)
	Discontinued operations, net	2,073,527			720,906			1,008,138
	Numerator for net income per Unit – basic and diluted (1)	$	1,901,746		$	864,853		$	920,500
	Denominator for net income per Unit – basic and diluted (1):
	Denominator for net income per Unit – basic	368,038			316,554			308,062
	Effect of dilutive securities:
	Dilution for Units issuable upon assumed exercise/vesting of the Company's				3,212
	long-term compensation shares/units
	Denominator for net income per Unit – diluted (1)	368,038			319,766			308,062
	Net income per Unit – basic	$	5.16		$	2.73		$	2.98
	Net income per Unit – diluted	$	5.16		$	2.7		$	2.98
	Net income per Unit – basic:
	(Loss) income from continuing operations available to Units	$	(0.466	)	$	0.454		$	(0.284	)
	Discontinued operations, net	5.621			2.275			3.268
	Net income per Unit – basic	$	5.155		$	2.729		$	2.984
	Net income per Unit – diluted (1):
	(Loss) income from continuing operations available to Units	$	(0.466	)	$	0.45		$	(0.284	)
	Discontinued operations, net	5.621			2.255			3.268
	Net income per Unit – diluted	$	5.155		$	2.705		$	2.984
	Distributions declared per Unit outstanding	$	1.85		$	1.78		$	1.58
	-1	Potential Units issuable from the assumed exercise/vesting of the Company's long-term compensation shares/units are automatically anti-dilutive and therefore excluded from the diluted earnings per Unit calculation as the Operating Partnership had a loss from continuing operations for the years ended December 31, 2013 and 2011.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Components of discontinued operations	'
	The components of discontinued operations are outlined below and include the results of operations for the respective periods that the Company owned such assets during each of the years ended December 31, 2013, 2012 and 2011 (amounts in thousands).
		Year Ended December 31,
		2013			2012			2011
	REVENUES
	Rental income	$	121,942		$	445,832		$	560,399
	Total revenues	121,942			445,832			560,399
	EXPENSES (1)
	Property and maintenance	36,792			103,371			160,315
	Real estate taxes and insurance	11,903			41,208			50,173
	Property management	1			211			266
	Depreciation	34,380			124,323			157,441
	General and administrative	85			92			55
	Total expenses	83,161			269,205			368,250
	Discontinued operating income	38,781			176,627			192,149
	Interest and other income	217			156			198
	Other expenses	(3		)	(170		)	(421		)
	Interest (2):
	Expense incurred, net	(1,296		)	(3,811		)	(9,268		)
	Amortization of deferred financing costs	(228		)	(140		)	(1,230		)
	Income and other tax (expense) benefit	(449		)	(34		)	221
	Discontinued operations	37,022			172,628			181,649
	Net gain on sales of discontinued operations	2,036,505			548,278			826,489
	Discontinued operations, net	$	2,073,527		$	720,906		$	1,008,138
	-1	Includes expenses paid in the current period for properties sold in prior periods related to the Company’s period of ownership.
	-2	Includes only interest expense specific to secured mortgage notes payable for properties sold.

Share_Incentive_Plans_Tables

Share Incentive Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation [Abstract]	'
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	'
	The following tables summarize compensation information regarding the restricted shares, LTIP Units, share options and Employee Share Purchase Plan (“ESPP”) for the three years ended December 31, 2013, 2012 and 2011 (amounts in thousands):
		Year Ended December 31, 2013
		Compensation			Compensation				Compensation				Dividends
		Expense			Capitalized				Equity				Incurred
	Restricted shares	$	12,185		$	1,079			$	13,264			$	967
	LTIP Units	13,108			501				13,609				520
	Share options	9,569			945				10,514				—
	ESPP discount	612			20				632				—
	Total	$	35,474		$	2,545			$	38,019			$	1,487
		Year Ended December 31, 2012
		Compensation			Compensation				Compensation				Dividends
		Expense			Capitalized				Equity				Incurred
	Restricted shares	$	8,014		$	922			$	8,936			$	949
	LTIP Units	5,004			303				5,307				234
	Share options	10,970			782				11,752				—
	ESPP discount	844			121				965				—
	Total	$	24,832		$	2,128			$	26,960			$	1,183
		Year Ended December 31, 2011
		Compensation			Compensation				Compensation				Dividends
		Expense			Capitalized				Equity				Incurred
	Restricted shares	$	8,041		$	1,061			$	9,102			$	1,121
	LTIP Units	3,344			297				3,641				199
	Share options	8,711			834				9,545				—
	ESPP discount	1,081			113				1,194				—
	Total	$	21,177		$	2,305			$	23,482			$	1,320
Award activity of the Share Incentive Plans	'
	The table below summarizes the Award activity of the Share Incentive Plans for the three years ended December 31, 2013, 2012 and 2011:
		Common		Weighted				Restricted			Weighted				LTIP		Weighted
		Shares Subject		Average				Shares			Average Fair				Units		Average Fair
		to Options		Exercise Price							Value per						Value per
				per Option							Restricted Share						LTIP Unit
	Balance at December 31, 2010	10,106,488			$33.00			911,950				$32.05			247,508			$25.62
	Awards granted (1)	1,491,311			$53.70			170,588				$53.99			223,452			$46.64
	Awards exercised/vested (2) (3) (4)	(2,945,950	)		$32.27			(258,068	)			$38.32			(101,988	)		$38.57
	Awards forfeited	(41,559	)		$35.14			(126,960	)			$37.19			(1,352	)		$27.79
	Awards expired	(16,270	)		$44.13			—			—				—		—
	Balance at December 31, 2011	8,594,020			$36.81			697,510				$34.17			367,620			$34.80
	Awards granted (1)	1,164,484			$60.22			140,980				$60.20			70,235			$57.24
	Awards exercised/vested (2) (3) (4)	(1,608,425	)		$30.87			(300,809	)			$23.79			(152,821	)		$21.11
	Awards forfeited	(23,795	)		$51.55			(12,728	)			$46.25			—		—
	Awards expired	(11,029	)		$35.53			—			—				—		—
	Balance at December 31, 2012	8,115,255			$41.31			524,953				$46.81			285,034			$48.41
	Awards granted (1)	1,006,444			$55.07			246,731				$55.37			281,931			$52.73
	Awards exercised/vested (2) (3) (4)	(586,017	)		$29.34			(253,816	)			$36.81			(93,335	)		$32.97
	Awards forfeited	(47,819	)		$56.16			(17,634	)			$55.74			(2,374	)		$56.72
	Awards expired	(17,331	)		$47.51			—			—				—		—
	Balance at December 31, 2013	8,470,532			$43.67			500,234				$55.79			471,256			$55.67
	-1	The weighted average grant date fair value for Options granted during the years ended December 31, 2013, 2012 and 2011 was $7.97 per share, $8.55 per share and $8.18 per share, respectively.
	-2	The aggregate intrinsic value of options exercised during the years ended December 31, 2013, 2012 and 2011 was $16.7 million, $46.7 million and $74.8 million, respectively. These values were calculated as the difference between the strike price of the underlying awards and the per share price at which each respective award was exercised.
	-3	The fair value of restricted shares vested during the years ended December 31, 2013, 2012 and 2011 was $13.9 million, $18.0 million  and $14.0 million, respectively.
	-4	The fair value of LTIP Units vested during the years ended December 31, 2013, 2012 and 2011 was $5.1 million, $9.1 million and $5.5 million, respectively.
Information regarding options outstanding and exercisable	'
	The following table summarizes information regarding options outstanding and exercisable at December 31, 2013:
			Options Outstanding (1)								Options Exercisable (2)
	Range of Exercise Prices		Options		Weighted		Weighted				Options			Weighted
					Average		Average							Average
					Remaining		Exercise Price							Exercise Price
					Contractual Life in Years
	$18.70 to $24.93		1,235,980		5.08			$23.07			1,235,980				$23.07
	$24.94 to $31.16		386,723		0.08			$29.25			386,723				$29.25
	$31.17 to $37.39		1,332,280		4.58			$32.61			1,332,280				$32.61
	$37.40 to $43.62		1,347,487		3.2			$40.46			1,347,487				$40.46
	$43.63 to $49.86		61,187		6.55			$48.41			23,059				$48.06
	$49.87 to $56.09		2,774,770		6.99			$53.91			1,226,038				$53.64
	$56.10 to $62.32		1,332,105		8.2			$59.76			494,922				$59.98
	$18.70 to $62.32		8,470,532		5.6			$43.67			6,046,489				$38.76
	Vested and expected to vest		8,293,422		5.55			$43.42
	as of December 31, 2013
	-1	The aggregate intrinsic value of options outstanding that are vested and expected to vest as of December 31, 2013 is $85.6 million.
	-2	The aggregate intrinsic value and weighted average remaining contractual life in years of options exercisable as of December 31, 2013 is $85.5 million and 4.5 years, respectively.

Employee_Plans_Tables

Employee Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Employee Plans [Abstract]	'
Summary of information regarding the Common Shares issued under the ESPP	'
	The following table summarizes information regarding the Common Shares issued under the ESPP (the net proceeds noted below were contributed to ERPOP in exchange for OP Units):
		Year Ended December 31,
		2013	2012	2011
		(Amounts in thousands except share and per share amounts)
	Shares issued	73,468	110,054	113,107
	Issuance price ranges	$44.26 – $48.17	$46.33 – $51.78	$44.04 – $51.19
	Issuance proceeds	$3,401	$5,399	$5,262

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Schedule of Contractural Obligations [Table Text Block]	'
	The following table summarizes the Company’s contractual obligations for minimum rent payments under operating leases and deferred compensation for the next five years and thereafter as of December 31, 2013:
	Payments Due by Year (in thousands)
			2014		2015		2016		2017		2018		Thereafter		Total
	Operating Leases:
	Minimum Rent Payments (a)		$	14,518	$	14,935	$	15,084	$	14,961	$	14,830	$	869,687	$	944,015
	Other Long-Term Liabilities:
	Deferred Compensation (b)		1,378		1,705		1,705		1,705		1,705		5,596		13,794
	(a)	Minimum basic rent due for various office space the Company leases and fixed base rent due on ground leases for 14 properties/parcels.
	(b)	Estimated payments to the Company's Chairman, Vice Chairman and one former CEO based on actual and planned retirement dates.

Reportable_Segments_Tables

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]	'
Reportable Segments Schedule	'
	The following tables present NOI for each segment from our rental real estate specific to continuing operations for the years ended December 31, 2013, 2012 and 2011, respectively, as well as total assets and capital expenditures at December 31, 2013 and 2012, respectively (amounts in thousands):
			Year Ended December 31, 2013									Year Ended December 31, 2012							Year Ended December 31, 2011
			Rental Income			Operating Expenses			NOI			Rental Income		Operating Expenses		NOI			Rental Income			Operating Expenses			NOI
	Same store (1)
	Boston		$	175,031		$	57,261		$	117,770		$	168,063	$	54,888	$	113,175		$	142,514		$	49,317		$	93,197
	Denver		100,425			30,028			70,397			93,571		28,204		65,367			99,681			32,564			67,117
	New York		286,345			114,587			171,758			274,683		109,667		165,016			254,441			104,492			149,949
	San Francisco		173,011			59,104			113,907			159,535		57,373		102,162			126,951			43,627			83,324
	Seattle		129,283			43,718			85,565			122,267		41,041		81,226			122,494			45,275			77,219
	South Florida		185,361			69,891			115,470			177,675		67,811		109,864			174,417			66,838			107,579
	Southern California		333,917			107,346			226,571			320,749		103,925		216,824			299,508			98,907			200,601
	Washington DC		253,056			76,033			177,023			247,880		75,580		172,300			240,755			75,492			165,263
	Non-core		132,851			49,275			83,576			128,816		48,548		80,268			310,688			122,159			188,529
	Total same store		1,769,280			607,243			1,162,037			1,693,239		587,037		1,106,202			1,771,449			638,671			1,132,778
	Non-same store/other (2) (3)
	Boston		61,139			18,238			42,901			—		—		—			8,115			2,361			5,754
	Denver		2,805			744			2,061			1,325		429		896			—			1			(1		)
	New York		136,182			43,055			93,127			14,611		5,988		8,623			6,794			366			6,428
	San Francisco		119,749			42,851			76,898			7,268		3,022		4,246			3,889			1,796			2,093
	Seattle		19,462			6,284			13,178			4,747		1,510		3,237			6,012			2,149			3,863
	South Florida		2,653			1,031			1,622			—		—		—			14,488			5,165			9,323
	Southern California		74,123			31,599			42,524			3,040		1,179		1,861			30,539			12,144			18,395
	Washington DC		179,077			58,759			120,318			13,124		3,984		9,140			36,657			11,373			25,284
	Other (3)		13,534			17,998			(4,464		)	575		17,666		(17,091		)	(3,477		)	7,326			(10,803		)
	Properties sold in 2013 (4)		—			—			—			—		—		—			(358,272		)	(116,699		)	(241,573		)
	Total non-same store/other		608,724			220,559			388,165			44,690		33,778		10,912			(255,255		)	(74,018		)	(181,237		)
	Total		$	2,378,004		$	827,802		$	1,550,202		$	1,737,929	$	620,815	$	1,117,114		$	1,516,194		$	564,653		$	951,541
	-1	For the years ended December 31, 2013 and 2012, same store primarily includes all properties acquired or completed and stabilized prior to January 1, 2012, less properties subsequently sold, which represented 80,247 apartment units. For the year ended December 31, 2011, same store primarily includes all properties acquired or completed and stabilized prior to January 1, 2011, less properties subsequently sold, which represented 98,577 apartment units.
	-2	For the years ended December 31, 2013 and 2012, non-same store primarily includes properties acquired after January 1, 2012, plus any properties in lease-up and not stabilized as of January 1, 2012 . For the year ended December 31, 2011, non-same store primarily includes properties acquired after January 1, 2011, plus any properties in lease-up and not stabilized as of January 1, 2011.
	-3	Other includes development and other corporate operations.
	-4	Reflects discontinued operations for properties sold during 2013.
			Year Ended December 31, 2013						Year Ended December 31, 2012
			Total Assets			Capital Expenditures			Total Assets			Capital Expenditures
	Same store (1)
	Boston		$	1,087,370		$	15,630		$	1,133,098		$	22,592
	Denver		520,999			5,330			542,243			4,593
	New York		2,678,546			8,982			2,742,346			12,437
	San Francisco		968,840			11,767			999,267			18,010
	Seattle		835,584			6,398			865,068			6,892
	South Florida		1,157,283			14,550			1,193,506			17,338
	Southern California		2,177,336			16,580			2,250,301			17,747
	Washington DC		1,873,897			10,069			1,941,446			15,426
	Non-core		645,418			5,186			674,360			6,989
	Total same store		11,945,273			94,492			12,341,635			122,024
	Non-same store/other (2) (3)
	Boston		946,747			2,097			—			—
	Denver		20,481			54			20,974			5
	New York		2,092,454			3,024			406,013			142
	San Francisco		1,824,550			9,989			178,339			1,176
	Seattle		312,240			1,598			90,205			67
	South Florida		50,414			300			—			—
	Southern California		1,078,038			3,975			70,389			141
	Washington DC		2,664,702			14,877			276,901			1,062
	Other (3)		1,899,646			5,410			3,816,544			28,211
	Total non-same store/other		10,889,272			41,324			4,859,365			30,804
	Total		$	22,834,545		$	135,816		$	17,201,000		$	152,828
	-1	Same store primarily includes all properties acquired or completed and stabilized prior to January 1, 2012, less properties subsequently sold, which represented 80,247 apartment units.
	-2	Non-same store primarily includes properties acquired after January 1, 2012, plus any properties in lease-up and not stabilized as of January 1, 2012.
	-3	Other includes development and other corporate operations.
Reconciliation of NOI	'
	The following table presents a reconciliation of NOI from our rental real estate specific to continuing operations for the years ended December 31, 2013, 2012 and 2011, respectively (amounts in thousands):
			Year Ended December 31,
			2013			2012			2011
	Rental income		$	2,378,004		$	1,737,929		$	1,516,194
	Property and maintenance expense		(449,461		)	(332,190		)	(304,380		)
	Real estate taxes and insurance expense		(293,999		)	(206,723		)	(178,406		)
	Property management expense		(84,342		)	(81,902		)	(81,867		)
	Total operating expenses		(827,802		)	(620,815		)	(564,653		)
	Net operating income		$	1,550,202		$	1,117,114		$	951,541

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Schedule of Quarterly Financial Information [Table Text Block]	'
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2012		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues (2)		$	414,037		$	431,910		$	449,072		$	452,483
	Operating income (2)		102,110			121,745			142,020			148,247
	(Loss) income from continuing operations (2)		(25,394		)	(6,340		)	91,269			100,763
	Discontinued operations, net (2)		177,561			114,655			145,054			283,636
	Net income *		152,167			108,315			236,323			384,399
	Net income available to Common Shares		141,833			99,797			218,603			365,979
	Earnings per share – basic:
	Net income available to Common Shares		$	0.47		$	0.33		$	0.73		$	1.18
	Weighted average Common Shares outstanding		298,805			300,193			301,336			310,398
	Earnings per share – diluted:
	Net income available to Common Shares		$	0.47		$	0.33		$	0.72		$	1.17
	Weighted average Common Shares outstanding		298,805			300,193			318,773			327,108
	-2	The amounts presented for the four quarters of 2012 are not equal to the same amounts previously reported in the Form 8-K filed with the SEC on June 17, 2013 (for the first and fourth quarters of 2012), the second quarter 2013 Form 10-Q filed with the SEC on August 8, 2013 (for the second quarter of 2012) and the third quarter 2013 Form 10-Q filed with the SEC on November 7, 2013 (for the third quarter of 2012) as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013.
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2013		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues (1)		$	504,722		$	617,217		$	626,629		$	639,134
	Operating income (1)		104,246			63,977			120,396			223,669
	(Loss) income from continuing operations (1)		(165,339		)	(58,511		)	(13,465		)	69,141
	Discontinued operations, net (1)		1,226,373			395,243			405,182			46,729
	Net income *		1,061,034			336,732			391,717			115,870
	Net income available to Common Shares		1,016,650			323,723			376,155			109,940
	Earnings per share – basic:
	Net income available to Common Shares		$	3.01		$	0.9		$	1.05		$	0.31
	Weighted average Common Shares outstanding		337,532			359,653			359,811			359,919
	Earnings per share – diluted:
	Net income available to Common Shares		$	3.01		$	0.9		$	1.05		$	0.3
	Weighted average Common Shares outstanding		337,532			359,653			359,811			375,860
	-1	The amounts presented for the first three quarters of 2013 are not equal to the same amounts previously reported in the respective Form 10-Q’s filed with the SEC for each period as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013.
Quarterly of Financial Information Previously Reported Reconciliation [Table Text Block]	'
	Below is a reconciliation to the amounts previously reported:
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2012		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues previously reported in June 2013 Form 8-K/Form 10-Q		$	446,448		$	448,351		$	451,699		$	485,868
	Total revenues subsequently reclassified to discontinued operations		(32,411		)	(16,441		)	(2,627		)	(33,385		)
	Total revenues disclosed in Form 10-K		$	414,037		$	431,910		$	449,072		$	452,483
	Operating income previously reported in June 2013 Form 8-K/Form		$	114,476		$	128,560		$	142,932		$	162,109
	10-Q
	Operating income subsequently reclassified to discontinued		(12,366		)	(6,815		)	(912		)	(13,862		)
	operations
	Operating income disclosed in Form 10-K		$	102,110		$	121,745		$	142,020		$	148,247
	(Loss) income from continuing operations previously reported in		$	(13,426	)	$	474		$	92,181		$	114,239
	June 2013 Form 8-K/Form 10-Q
	Income from continuing operations subsequently reclassified to		(11,968		)	(6,814		)	(912		)	(13,476		)
	discontinued operations
	(Loss) income from continuing operations disclosed in Form 10-K		$	(25,394	)	$	(6,340	)	$	91,269		$	100,763
	Discontinued operations, net previously reported in June 2013		$	165,593		$	107,841		$	144,142		$	270,160
	Form 8-K/Form 10-Q
	Discontinued operations, net from properties sold subsequent to the		11,968			6,814			912			13,476
	respective reporting period
	Discontinued operations, net disclosed in Form 10-K		$	177,561		$	114,655		$	145,054		$	283,636
	* The Company did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2013 and 2012. Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.
	Below is a reconciliation to the amounts previously reported:
			First			Second			Third
			Quarter			Quarter			Quarter
	2013		31-Mar			30-Jun			30-Sep
	Total revenues previously reported in Form 10-Q		$	539,162		$	635,078		$	629,446
	Total revenues subsequently reclassified to discontinued operations		(34,440		)	(17,861		)	(2,817		)
	Total revenues disclosed in Form 10-K		$	504,722		$	617,217		$	626,629
	Operating income previously reported in Form 10-Q		$	117,529		$	71,033		$	121,394
	Operating income subsequently reclassified to discontinued operations		(13,283		)	(7,056		)	(998		)
	Operating income disclosed in Form 10-K		$	104,246		$	63,977		$	120,396
	(Loss) from continuing operations previously reported in Form 10-Q		$	(153,352	)	$	(51,455	)	$	(12,467	)
	(Loss) from continuing operations subsequently reclassified to discontinued		(11,987		)	(7,056		)	(998		)
	operations
	(Loss) from continuing operations disclosed in Form 10-K		$	(165,339	)	$	(58,511	)	$	(13,465	)
	Discontinued operations, net previously reported in Form 10-Q		$	1,214,386		$	388,187		$	404,184
	Discontinued operations, net from properties sold subsequent to the respective		11,987			7,056			998
	reporting period
	Discontinued operations, net disclosed in Form 10-K		$	1,226,373		$	395,243		$	405,182
Operating Partnership [Member]	'
Schedule of Quarterly Financial Information [Table Text Block]	'
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2013		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues (1)		$	504,722		$	617,217		$	626,629		$	639,134
	Operating income (1)		104,246			63,977			120,396			223,669
	(Loss) income from continuing operations (1)		(165,339		)	(58,511		)	(13,465		)	69,141
	Discontinued operations, net (1)		1,226,373			395,243			405,182			46,729
	Net income *		1,061,034			336,732			391,717			115,870
	Net income available to Units		1,059,973			336,511			390,991			114,271
	Earnings per Unit – basic:
	Net income available to Units		$	3.01		$	0.9		$	1.05		$	0.31
	Weighted average Units outstanding		351,255			373,403			373,547			373,643
	Earnings per Unit – diluted:
	Net income available to Units		$	3.01		$	0.9		$	1.05		$	0.3
	Weighted average Units outstanding		351,255			373,403			373,547			375,860
	-1	The amounts presented for the first three quarters of 2013 are not equal to the same amounts previously reported in the respective Form 10-Q’s filed with the SEC for each period as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013.
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2012		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues (2)		$	414,037		$	431,910		$	449,072		$	452,483
	Operating income (2)		102,110			121,745			142,020			148,247
	(Loss) income from continuing operations (2)		(25,394		)	(6,340		)	91,269			100,763
	Discontinued operations, net (2)		177,561			114,655			145,054			283,636
	Net income *		152,167			108,315			236,323			384,399
	Net income available to Units		148,251			104,529			229,099			382,974
	Earnings per Unit – basic:
	Net income available to Units		$	0.47		$	0.33		$	0.73		$	1.18
	Weighted average Units outstanding		312,011			314,255			315,513			324,364
	Earnings per Unit – diluted:
	Net income available to Units		$	0.47		$	0.33		$	0.72		$	1.17
	Weighted average Units outstanding		312,011			314,255			318,773			327,108
	-2	The amounts presented for the four quarters of 2012 are not equal to the same amounts previously reported in the Form 8-K filed with the SEC on June 17, 2013 (for the first and fourth quarters of 2012), the second quarter 2013 Form 10-Q filed with the SEC on August 8, 2013 (for the second quarter of 2012) and the third quarter 2013 Form 10-Q filed with the SEC on November 7, 2013 (for the third quarter of 2012) as a result of changes in discontinued operations due to additional property sales which occurred throughout 2013.
Quarterly of Financial Information Previously Reported Reconciliation [Table Text Block]	'
	Below is a reconciliation to the amounts previously reported:
			First			Second			Third			Fourth
			Quarter			Quarter			Quarter			Quarter
	2012		31-Mar			30-Jun			30-Sep			31-Dec
	Total revenues previously reported in June 2013 Form 8-K/Form		$	446,448		$	448,351		$	451,699		$	485,868
	10-Q
	Total revenues subsequently reclassified to discontinued operations		(32,411		)	(16,441		)	(2,627		)	(33,385		)
	Total revenues disclosed in Form 10-K		$	414,037		$	431,910		$	449,072		$	452,483
	Operating income previously reported in June 2013 Form 8-K/Form		$	114,476		$	128,560		$	142,932		$	162,109
	10-Q
	Operating income subsequently reclassified to discontinued		(12,366		)	(6,815		)	(912		)	(13,862		)
	operations
	Operating income disclosed in Form 10-K		$	102,110		$	121,745		$	142,020		$	148,247
	(Loss) income from continuing operations previously reported in		$	(13,426	)	$	474		$	92,181		$	114,239
	June 2013 Form 8-K/Form 10-Q
	Income from continuing operations subsequently reclassified to		(11,968		)	(6,814		)	(912		)	(13,476		)
	discontinued operations
	(Loss) income from continuing operations disclosed in Form 10-K		$	(25,394	)	$	(6,340	)	$	91,269		$	100,763
	Discontinued operations, net previously reported in June 2013 Form		$	165,593		$	107,841		$	144,142		$	270,160
	8-K/Form 10-Q
	Discontinued operations, net from properties sold subsequent to the		11,968			6,814			912			13,476
	respective reporting period
	Discontinued operations, net disclosed in Form 10-K		$	177,561		$	114,655		$	145,054		$	283,636
	* The Operating Partnership did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2013 and 2012. Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.
	Below is a reconciliation to the amounts previously reported:
			First			Second			Third
			Quarter			Quarter			Quarter
	2013		31-Mar			30-Jun			30-Sep
	Total revenues previously reported in Form 10-Q		$	539,162		$	635,078		$	629,446
	Total revenues subsequently reclassified to discontinued operations		(34,440		)	(17,861		)	(2,817		)
	Total revenues disclosed in Form 10-K		$	504,722		$	617,217		$	626,629
	Operating income previously reported in Form 10-Q		$	117,529		$	71,033		$	121,394
	Operating income subsequently reclassified to discontinued operations		(13,283		)	(7,056		)	(998		)
	Operating income disclosed in Form 10-K		$	104,246		$	63,977		$	120,396
	(Loss) from continuing operations previously reported in Form 10-Q		$	(153,352	)	$	(51,455	)	$	(12,467	)
	(Loss) from continuing operations subsequently reclassified to discontinued		(11,987		)	(7,056		)	(998		)
	operations
	(Loss) from continuing operations disclosed in Form 10-K		$	(165,339	)	$	(58,511	)	$	(13,465	)
	Discontinued operations, net previously reported in Form 10-Q		$	1,214,386		$	388,187		$	404,184
	Discontinued operations, net from properties sold subsequent to the respective		11,987			7,056			998
	reporting period
	Discontinued operations, net disclosed in Form 10-K		$	1,226,373		$	395,243		$	405,182

Business_Details

Business (Details)	Dec. 31, 2013
Property/Unit schedule	'
Wholly Owned Properties	362
Master Leased Properties Acquired	3
Partially Owned Consolidated Properties	19
Partially Owned Unconsolidated Properties	4
Military Housing Properties	2
Wholly Owned Units	98,468
Master Leased Units	853
Partially Owned Consolidated Units	3,752
Partially Owned Unconsolidated Units	1,669
Military Housing Units	5,113
Business (Textuals) [Abstract]	'
Number of operating properties under long-term ground leases	13
Number of land parcels under long-term ground leases	1
Noncontrolling Interest, Ownership Percentage by Parent	96.20%
Number of Real Estate Properties	390
Number of Units in Real Estate Property	109,855
Number of States in which Entity Operates	12

Summary_of_Significant_Account3

Summary of Significant Accounting Policies Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common Stock, Par or Stated Value Per Share	$0.01	$0.01	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	26.90%	27.40%	27.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	'5 years 0 months 0 days	'5 years 0 months 0 days	'5 years 0 months 0 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	4.12%	4.35%	4.56%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.84%	0.71%	2.27%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$7.90	$8.54	$8.36
Historical Volatility Period Basis	'10 years	'	'
Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$7.97	$8.55	$8.18

Summary_of_Significant_Account4

Summary of Significant Accounting Policies Tax (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets Gross	$79,600,000	'	'
Income Tax Expense (Benefit)	1,169,000	514,000	706,000
Discontinued Operation, Tax Effect of Discontinued Operation	449,000	34,000	-221,000
Provision for income, franchise and excise taxes	1,618,000	548,000	485,000
Operating Loss Carryforwards	63,100,000	'	'
Tax Treatment Of Dividends And Distributions Ordinary Dividends	$0.66	$1.38	$0.67
Tax Treatment Of Dividends And Distributions Qualified Dividends	$0.05	$0	$0
Tax Treatment Of Dividends And Distributions Long Term Capital Gain	$0.87	$0.25	$0.63
Tax Treatment Of Dividends And Distributions Unrecaptured Section Twelve Hundred And Fifty Gain	$0.27	$0.15	$0.28
Distributions declared per Common Share outstanding	$1.85	$1.78	$1.58
Land And Depreciable Property Net	$15,200,000,000	$11,200,000,000	'
Minimum [Member]	'	'	'
Operating Loss Carryforwards, Expiration Dates	1-Jan-28	'	'
Maximum [Member]	'	'	'
Operating Loss Carryforwards, Expiration Dates	31-Dec-32	'	'

Summary_of_Significant_Account5

Summary of Significant Accounting Policies Text (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 18, 2011	Aug. 23, 2006
Number Of Unconsolidated Projects	3	'	'	'	'
Partially Owned Unconsolidated Properties	4	'	'	'	'
Indirect Ownership Interest Percentage	1.00%	'	'	'	'
Value of furniture and fixtures minimum range	$3,000	'	'	'	'
Value of furniture and fixtures maximum range	13,000	'	'	'	'
Lease Intangibles, Average Term	6	'	'	'	'
Capitalized Costs Development and Renovation	16,500,000	14,300,000	11,600,000	'	'
Accumulated Amortization, Deferred Finance Costs	33,400,000	32,200,000	'	'	'
Partially Owned Consolidated Properties	19	'	'	'	'
Partially Owned Consolidated Units	3,752	'	'	'	'
Noncontrolling Interests - Partially Owned Properties	126,583,000	77,688,000	'	'	'
Noncontrolling Interests Settlement Value	51,200,000	'	'	'	'
Convertible Debt	'	'	'	482,500,000	650,000,000
Debt Instrument, Interest Rate, Stated Percentage	'	'	'	'	3.85%
Debt Instrument, Interest Rate, Effective Percentage	'	'	'	'	5.80%
Expense incurred, net	586,854,000	455,236,000	460,172,000	'	'
Debt Instrument, Convertible, Carrying Amount of Equity Component	44,300,000	'	'	'	44,300,000
Effect Of Change In Accounting Principle On Earnings Net Of Tax	'	'	5,000,000	'	'
Effect of change in accounting Principle On Earnings Per Share Net Of Tax	'	'	$0.02	'	'
Retained Earnings Decrease	27,000,000	'	'	'	'
Cumulative effect On Notes From Adoption Of Accounting Principle	17,300,000	'	'	'	'
Furniture and Fixtures [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'5	'	'	'	'
Furniture and Fixtures Maximum [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'10	'	'	'	'
Building [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'30	'	'	'	'
Building Improvements [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'8	'	'	'	'
Replacements Minimum [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'5	'	'	'	'
Replacements Maximum [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'10	'	'	'	'
Renovations and Improvements Minimum [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'5	'	'	'	'
Renovations and Improvements Maximum [Member]	'	'	'	'	'
Property, Plant and Equipment, Estimated Useful Lives	'15	'	'	'	'
Minimum [Member]	'	'	'	'	'
Retail/Commercial Leases Term	5	'	'	'	'
Maximum [Member]	'	'	'	'	'
Retail/Commercial Leases Term	10	'	'	'	'
Limited Life Partnership Properties [Member]	'	'	'	'	'
Partially Owned Limited Life Partnership Properties	6	'	'	'	'
Noncontrolling Interest Balance Limited Life Partnerships	-9,800,000	'	'	'	'
Convertible Debt [Member]	'	'	'	'	'
Expense incurred, net	'	'	$11,800,000	'	'
Unconsolidated Development Projects Held for and or Under Development [Domain]	'	'	'	'	'
Number Of Unconsolidated Projects	1	'	'	'	'
Unconsolidated Operating [Domain]	'	'	'	'	'
Partially Owned Unconsolidated Properties	4	'	'	'	'

Equity_Capital_and_Other_Inter2

Equity, Capital and Other Interests EQR Common Shares (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common Stock, Shares, Outstanding January 1,	360,479,260	325,054,654	297,508,185	290,197,242
Common Shares Issued:	'	'	'	'
Conversion of OP Units	67,939	675,817	341,594	'
Stock Issued During Period, Shares, New Issues	34,468,085	25,023,919	3,866,666	'
Exercise of share options	586,017	1,608,427	2,945,948	'
Employee Share Purchase Plan (ESPP)	73,468	110,054	113,107	'
Restricted Share Grants Net	229,097	128,252	145,616	'
Common Shares Other:	'	'	'	'
Conversion of restricted shares to LTIP Units	0	0	-101,988	'
Units	'	'	'	'
Common Shares And Units Outstanding	374,659,636	339,023,412	311,000,728	'
Units Ownership Interest in Operating Partnership	3.78%	4.10%	4.30%	'
OP Units Issued:	'	'	'	'
Issue Price Per OP Unit	$0	$61.57	$0	'
Valuation Operating Partnership Unit	'	$66,600,000	'	'
Limited Partner [Member]	'	'	'	'
Common Shares Other:	'	'	'	'
Conversion of restricted shares to LTIP Units	0	0	101,988	'
Units	'	'	'	'
Total Units Outstanding	14,180,376	13,968,758	13,492,543	13,612,037
Issuance Of LTIPs	279,557	70,235	120,112	'
Issuance Of Units	0	1,081,797	0	'
Shares Issued During Period Shares Conversion Of Units To Common Shares	-67,939	-675,817	-341,594	'
OP Units Issued:	'	'	'	'
Valuation Operating Partnership Unit	'	$66,600,000	'	'
ATM Program [Member]	'	'	'	'
Common Shares Issued:	'	'	'	'
Stock Issued During Period, Shares, New Issues	'	3,200,000	'	'

Equity_Capital_and_Other_Inter3

Equity, Capital and Other Interest Redeemable (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Redeemable Noncontrolling Interests - Operating Partnership	$363,144	$398,372	$416,404	$383,540
Change in market value	-79,667	-38,734	22,714	'
Change in carrying value	44,439	20,702	10,150	'
Partnership Interest [Member]	'	'	'	'
Redemption Value Limited Partners	363,144	398,372	416,404	383,540
Limited Partners Change In Redemption Value	-79,667	-38,734	22,714	'
Limited Partners Change In Carrying Value	$44,439	$20,702	$10,150	'

Equity_Capital_and_Other_Inter4

Equity, Capital and Other Interests Preferred (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Class of Stock [Line Items]	'	'	'
Preferred Stock, Shares Authorized	100,000,000	100,000,000	'
Preferred Stock, Par or Stated Value Per Share	$0.01	$0.01	'
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,000,000 shares issued and outstanding as of December 31, 2013 and December 31, 2012	$50,000	$50,000	'
Payments for Repurchase of Preferred Stock and Preference Stock	0	-150,000	0
Series K Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Preferred Stock Preference Units Issued	1,000,000	1,000,000	'
Preferred Stock Preference Units Outstanding	1,000,000	1,000,000	'
Preferred Stock Preference Units Redemption Price Per Share Unit	$50	$50	'
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%	'
Preferred Stocks Preference Units Redemption Date	10-Dec-26	'	'
Annual Dividend Per Preferred Share Preference Unit	$4.14	'	'
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,000,000 shares issued and outstanding as of December 31, 2013 and December 31, 2012	50,000	50,000	'
Operating Partnership [Member] | Series K Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Preferred Stock Preference Units Issued	1,000,000	1,000,000	'
Preferred Stock Preference Units Outstanding	1,000,000	1,000,000	'
Preferred Stock Preference Units Redemption Price Per Share Unit	$50	$50	'
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%	'
Preferred Stocks Preference Units Redemption Date	10-Dec-26	'	'
Annual Dividend Per Preferred Share Preference Unit	$4.14	'	'
Preferred Units Value Outstanding	$50,000	$50,000	'

Equity_Capital_and_Other_Inter5

Equity, Capital and Other Interests ERP Units (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capital Unit [Line Items]	'	'	'	'
Common Shares And Units Outstanding	374,659,636	339,023,412	311,000,728	'
Exercise of EQR share options	586,017	1,608,427	2,945,948	'
EQR's Employee Share Purchase Plan (ESPP)	73,468	110,054	113,107	'
Restricted Share Grants Net	229,097	128,252	145,616	'
Conversion of restricted shares to LTIP Units	0	0	-101,988	'
Units Ownership Interest in Operating Partnership	3.78%	4.10%	4.30%	'
OP Units Issued:	'	'	'	'
Issue Price Per OP Unit	0	61.57	0	'
Valuation Operating Partnership Unit	'	66,600,000	'	'
General And Limited Partner [Member]	'	'	'	'
Capital Unit [Line Items]	'	'	'	'
Common Shares And Units Outstanding	374,659,636	339,023,412	311,000,728	303,809,279
Issuance of OP Units	34,468,085	25,023,919	'	'
Exercise of EQR share options	586,017	1,608,427	2,945,948	'
EQR's Employee Share Purchase Plan (ESPP)	73,468	110,054	113,107	'
Restricted Share Grants Net	229,097	128,252	145,616	'
Issuance Of LTIPs	279,557	70,235	120,112	'
Issuance Of Units	0	1,081,797	0	'
Limited Partner [Member]	'	'	'	'
Capital Unit [Line Items]	'	'	'	'
Issuance Of LTIPs	279,557	70,235	120,112	'
Issuance Of Units	0	1,081,797	0	'
Total Units Outstanding	14,180,376	13,968,758	13,492,543	13,612,037
Conversion of restricted shares to LTIP Units	0	0	101,988	'
Shares Issued During Period Shares Conversion Of Units To Common Shares	-67,939	-675,817	-341,594	'
Units Ownership Interest in Operating Partnership	3.80%	4.10%	4.30%	'
OP Units Issued:	'	'	'	'
Issue Price Per OP Unit	0	61.57	0	'

Equity_Capital_and_Other_Inter6

Equity, Capital and Other Interests Text (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Preferred Stock, Shares Authorized	'	100,000,000	100,000,000	'
Additional Common Shares Authorized	'	13,000,000	'	'
Stock Issued During Period, Shares, New Issues	'	34,468,085	25,023,919	3,866,666
Average Price Per Common Share Issued	'	'	$60.59	$52.23
Stock Issued During Period, Value, New Issues	'	'	$192,300,000	$201,900,000
Payments of Stock Issuance Costs	'	1,047,000	39,359,000	3,596,000
Units Issued During Period New Issues	'	'	3,200,000	3,900,000
Common Stock Capital Shares Reserved For Future Issuance Under Share Offering Program	'	17,000,000	'	'
Common Shares Added To Atm Program	'	5,700,000	'	'
Shares not settled	'	'	'	500,000
Consideration From Shares Not Settled	'	'	'	28,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	'	12,980,741	12,980,741	'
Stock Repurchase Program, Remaining Authorized Repurchase Amount	464,600,000	'	'	'
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	'	13,000,000	'	'
Payments for Repurchase of Preferred Stock and Preference Stock	'	0	150,000,000	0
Issuance Of Units To Noncontrolling Interests	'	'	1,081,797	'
Price Per Unit Issued	'	'	$61.57	'
Properties acquired	'	'	1	'
Proceeds from Issuance of Common Limited Partners Units	'	'	66,600,000	'
Partially Owned Properties Acquired Properties	'	'	1	3
Partially Owned Units Acquired Units	'	'	'	1,351
Change in Paid In Capital	'	'	1,300,000	-4,800,000
Reduction In Partially Owned Properties	'	'	1,300,000	8,000,000
Archstone Transaction [Member]	'	'	'	'
Stock Issued During Period, Shares, New Issues	'	34,468,085	'	'
Average Price Per Common Share Issued	'	$55.99	'	'
Stock Issued During Period, Value, New Issues	'	1,900,000,000	'	'
Units Issued During Period New Issues	'	34,468,085	'	'
Public Offering [Member]	'	'	'	'
Stock Issued During Period, Shares, New Issues	'	'	21,850,000	'
Average Price Per Common Share Issued	'	'	$54.75	'
Stock Issued During Period, Value, New Issues	'	'	1,200,000,000	'
Payments of Stock Issuance Costs	'	'	35,900,000	'
Units Issued During Period New Issues	'	'	21,850,000	'
General And Limited Partner [Member]	'	'	'	'
Stock Issued During Period Shares	'	34,468,085	25,023,919	'
Series N Preferred Stock [Member]	'	'	'	'
Payments for Repurchase of Preferred Stock and Preference Stock	'	150,000,000	'	'
Premium on Redemption of Preferred Shares Preference Units Original Issuance	'	5,100,000	'	'
Partner Buyout [Member]	'	'	'	'
Purchase Price, Business Acquisition, Cost of Acquired Entity	'	'	'	$12,800,000
ATM Program [Member]	'	'	'	'
Stock Issued During Period, Shares, New Issues	'	'	3,200,000	'
ATM Program [Member] | General And Limited Partner [Member]	'	'	'	'
Stock Issued During Period Shares	'	'	'	3,866,666

Real_Estate_Real_Estate_Detail

Real Estate Real Estate (Details) (USD $)	12 Months Ended			48 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Land	$6,192,512,000	$4,554,912,000	'	$6,192,512,000
Property, Plant and Equipment [Abstract]	'	'	'	'
Investment Building and Building Improvements	17,509,609,000	14,135,740,000	'	17,509,609,000
Fixtures and Equipment, Gross	1,214,220,000	1,343,765,000	'	1,214,220,000
Finite-Lived Intangible Assets, Gross	502,218,000	232,439,000	'	502,218,000
Development in Process	988,867,000	387,750,000	'	988,867,000
Land Available for Development	393,522,000	353,823,000	'	393,522,000
Real Estate Investment Property, at Cost	26,800,948,000	21,008,429,000	'	26,800,948,000
Real Estate Investment Property, Accumulated Depreciation	-4,807,709,000	-4,912,221,000	'	-4,807,709,000
Investment in real estate, net	21,993,239,000	16,096,208,000	'	21,993,239,000
Ground Lease Intangibles Below Market	178,251,000	'	'	178,251,000
Retail Lease Intangibles Above Market	1,260,000	'	'	1,260,000
Lease Intangible Assets	179,511,000	'	'	179,511,000
Accumulated Amortization Intangible Assets	-4,364,000	'	'	-4,364,000
Lease Intangible Assets, Net	175,147,000	'	'	175,147,000
Ground Lease Intangibles Above Market	2,400,000	'	'	2,400,000
Retail Lease Intangibles Below Market	5,500,000	'	'	5,500,000
Lease Intangible Liabilities	7,900,000	'	'	7,900,000
Amortization Of Intangible Liabilities	-1,161,000	'	'	-1,161,000
Lease Intangible Liabilities, net	6,739,000	'	'	6,739,000
Ground Lease Amortization	3,600,000	'	'	'
Retail Lease Amortization	2,700,000	'	'	'
Weighted Average Ground Lease Amortization Period	49.8	'	'	49.8
Weighted Average Retail Lease Amortization Period	2.8	'	'	2.8
Properties acquired	'	1	'	'
Master Leased Properties Acquired	3	'	'	3
Acquisition of Archstone, net of cash acquired	4,000,875,000	0	0	'
Mortgage notes payable	5,174,166,000	3,898,369,000	'	5,174,166,000
Stock Issued During Period, Shares, New Issues	34,468,085	25,023,919	3,866,666	'
Stock Issued During Period, Value, New Issues	'	192,300,000	201,900,000	'
Average Price Per Common Share Issued	'	$60.59	$52.23	'
Noncash or Part Noncash Acquisition, Debt Assumed	34,100,000	137,600,000	'	'
Mark-to-Market Debt Premiums	127,900,000	'	'	'
Number Of Operating Properties Under Long Term Ground Leases	13	'	'	13
Business Combination, Acquisition Related Costs	300,000	7,000,000	7,700,000	94,700,000
Payments of Financing Costs	16,526,000	21,209,000	20,421,000	'
Merger Expenses	19,864,000	5,619,000	1,736,000	81,200,000
(Loss) from investments in unconsolidated entities due to merger expenses	-54,004,000	0	0	'
Business Acquisition, Pro Forma Revenue	2,485,438,000	2,317,699,000	'	'
Business Acquisition, Proforma Income Loss From Continuing Operations	203,286,000	-54,940,000	'	'
Business Acquisition, Proforma Income Loss From Discontinued Operations Net Of Tax	2,074,072,000	720,361,000	'	'
Business Acquisition, Pro Forma Net Income (Loss)	2,277,358,000	665,421,000	'	'
Business Acquisition, Proforma Net Income Available to Common Shares	2,183,756,000	622,424,000	'	'
Business Acquisition, Pro Forma Earnings Per Share, Basic	$6.07	$1.74	'	'
Business Acquisition, Proforma Weighted Average Common Shares Basic	359,688,000	356,984,000	'	'
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$6.05	$1.74	'	'
Business Acquisition, Proforma Weighted Average Number Of Shares Diluted	375,861,000	356,984,000	'	'
Consolidated Properties [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Uncompleted Development Properties Acquired	2	'	'	2
Archstone [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Acquisition of Archstone, net of cash acquired	4,000,000,000	'	'	'
Mortgage notes payable	2,000,000,000	'	'	2,000,000,000
Noncash or Part Noncash Acquisition, Debt Assumed	3,100,000,000	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land	2,239,000,000	'	'	2,239,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	304,830,000	'	'	304,830,000
Business Combination Purchase Price Allocation Projects Under Development	36,583,000	'	'	36,583,000
Business Combination Purchase Price Allocation Land Held for Development	244,097,000	'	'	244,097,000
Business Combination Purchase Price Allocation Investments in Unconsolidated Entities	196,615,000	'	'	196,615,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	195,260,000	'	'	195,260,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	-112,107,000	'	'	-112,107,000
Payments of Financing Costs	2,500,000	8,400,000	2,600,000	13,500,000
Severance Costs	54,100,000	'	'	'
2014 [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Ground Lease Intangibles Amortization 5 Year	4,321,000	'	'	4,321,000
Retail Lease Intangibles Amortization 5 Year	-1,010,000	'	'	-1,010,000
Total Above And Below Market Ground Lease Intangibles And Retail Lease Intangibles 5 Year	3,311,000	'	'	3,311,000
2015 [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Ground Lease Intangibles Amortization 5 Year	4,321,000	'	'	4,321,000
Retail Lease Intangibles Amortization 5 Year	-1,016,000	'	'	-1,016,000
Total Above And Below Market Ground Lease Intangibles And Retail Lease Intangibles 5 Year	3,305,000	'	'	3,305,000
2016 [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Ground Lease Intangibles Amortization 5 Year	4,321,000	'	'	4,321,000
Retail Lease Intangibles Amortization 5 Year	-908,000	'	'	-908,000
Total Above And Below Market Ground Lease Intangibles And Retail Lease Intangibles 5 Year	3,413,000	'	'	3,413,000
2017 [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Ground Lease Intangibles Amortization 5 Year	4,321,000	'	'	4,321,000
Retail Lease Intangibles Amortization 5 Year	-540,000	'	'	-540,000
Total Above And Below Market Ground Lease Intangibles And Retail Lease Intangibles 5 Year	3,781,000	'	'	3,781,000
2018 [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Ground Lease Intangibles Amortization 5 Year	4,321,000	'	'	4,321,000
Retail Lease Intangibles Amortization 5 Year	-71,000	'	'	-71,000
Total Above And Below Market Ground Lease Intangibles And Retail Lease Intangibles 5 Year	4,250,000	'	'	4,250,000
Building and Building Improvements [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	5,805,467,000	'	'	5,805,467,000
Furniture and Fixtures [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	61,470,000	'	'	61,470,000
Archstone Transaction [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Ground Lease Intangibles Below Market	178,251,000	'	'	178,251,000
Retail Lease Intangibles Above Market	1,260,000	'	'	1,260,000
Ground Lease Intangibles Above Market	2,400,000	'	'	2,400,000
Retail Lease Intangibles Below Market	8,040,000	'	'	8,040,000
Business Acquisition, Percentage of Voting Interests Acquired	60.00%	'	'	60.00%
Properties acquired	71	'	'	'
Partially Owned Consolidated Properties Acquired	1	'	'	1
Partially Owned Consolidated Units Acquired	432	'	'	432
Partially Owned Unconsolidated Properties Acquired	1	'	'	1
Partially Owned Unconsolidated Units Acquired	336	'	'	336
Master Leased Properties Acquired	3	'	'	3
Master Leased Units Acquired	853	'	'	853
Uncompleted Development Properties Acquired	4	'	'	4
Uncompleted Development Units Acquired	964	'	'	964
Land parcels acquired	14	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	8,971,215,000	'	'	8,971,215,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	514,700,000	'	'	'
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual	352,800,000	'	'	'
Number Of Operating Properties Under Long Term Ground Leases	9	'	'	9
Unconsolidated Properties [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Uncompleted Development Properties Acquired	2	'	'	2
Projects under development [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Land Under Development	353,574,000	210,632,000	'	353,574,000
Development in Process	635,293,000	177,118,000	'	635,293,000
Land held for development [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Development in Process	52,133,000	58,955,000	'	52,133,000
Land Available for Development	341,389,000	294,868,000	'	341,389,000
Archstone Transaction [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Property Units Acquired	20,160	'	'	'
OPERATING PARTNERSHIP	'	'	'	'
Land	6,192,512,000	4,554,912,000	'	6,192,512,000
Property, Plant and Equipment [Abstract]	'	'	'	'
Development in Process	988,867,000	387,750,000	'	988,867,000
Land Available for Development	393,522,000	353,823,000	'	393,522,000
Real Estate Investment Property, at Cost	26,800,948,000	21,008,429,000	'	26,800,948,000
Real Estate Investment Property, Accumulated Depreciation	-4,807,709,000	-4,912,221,000	'	-4,807,709,000
Investment in real estate, net	21,993,239,000	16,096,208,000	'	21,993,239,000
Acquisition of Archstone, net of cash acquired	4,000,875,000	0	0	'
Mortgage notes payable	5,174,166,000	3,898,369,000	'	5,174,166,000
Payments of Financing Costs	16,526,000	21,209,000	20,421,000	'
Merger Expenses	19,864,000	5,619,000	1,736,000	'
(Loss) from investments in unconsolidated entities due to merger expenses	-54,004,000	0	0	'
Business Acquisition, Pro Forma Revenue	2,485,438,000	2,317,699,000	'	'
Business Acquisition, Proforma Income Loss From Continuing Operations	203,286,000	-54,940,000	'	'
Business Acquisition, Proforma Income Loss From Discontinued Operations Net Of Tax	2,074,072,000	720,361,000	'	'
Business Acquisition, Pro Forma Net Income (Loss)	2,277,358,000	665,421,000	'	'
Business Acquisition, Proforma Net Income Available to Units	2,273,798,000	651,548,000	'	'
Business Acquisition, Pro Forma Earnings Per Share, Basic	$6.07	$1.74	'	'
Business Acquisition, Proforma Weighted Average Limited Partnership And General Partnership Units Outstanding Basic	373,421,000	370,837,000	'	'
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$6.05	$1.74	'	'
Business Acquisition, Proforma Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Diluted	375,861,000	370,837,000	'	'
Archstone Transaction [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Stock Issued During Period, Shares, New Issues	34,468,085	'	'	'
Stock Issued During Period, Value, New Issues	1,900,000,000	'	'	'
Average Price Per Common Share Issued	$55.99	'	'	'
DelayedDrawTermLoan [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Term Loan Principal Amount	$750,000,000	'	'	$750,000,000
Consolidated Rental Properties [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Properties acquired	1	9	'	'
Property Units Acquired	322	1,896	'	'
Land [Member]	'	'	'	'
Property, Plant and Equipment [Abstract]	'	'	'	'
Property Units Acquired	0	0	'	'
Land parcels acquired	1	6	'	'

Real_Estate_Real_Estate_Detail1

Real Estate Real Estate (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Properties acquired	'	1	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$108,000,000	$1,047,545,000	'
Disposed Properties	94	35	'
Disposed Units	29,180	9,012	'
Proceeds From Sale Of Property	4,616,073,000	1,061,334,000	'
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	2,036,505,000	548,278,000	826,489,000
Net gain on sales of land parcels	12,227,000	0	4,217,000
Consolidated Rental Properties [Member]	'	'	'
Properties acquired	1	9	'
Property Units Acquired	322	1,896	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	91,500,000	906,305,000	'
Disposed Properties	94	35	'
Disposed Units	29,180	9,012	'
Proceeds From Sale Of Property	4,459,339,000	1,061,334,000	'
Land [Member]	'	'	'
Property Units Acquired	0	0	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	16,500,000	141,240,000	'
Proceeds From Sale Of Property	99,650,000	'	'
Land parcels acquired	1	6	'
Disposed Land Parcels	7	'	'
Unconsolidated Land Parcel Disposition	1	'	'
Commercial Real Estate [Member]	'	'	'
Proceeds From Sale Of Property	30,734,000	'	'
Commercial Properties Disposed	1	'	'
Unconsolidated Institutional Joint Ventures [Member]	'	'	'
Proceeds From Sale Of Property	$26,350,000	'	'

Commitments_to_AcquireDispose_2

Commitments to Acquire/Dispose of Real Estate (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Land Parcel [Member]	'
Commitments to Acquire Real Estate	'
Purchase Price For Commitments To Acquire	$10,290
Land Parcel [Member]	'
Commitments to Acquire Real Estate	'
Land Parcels Contracted to be Acquired	1
Commitments to Dispose of Real Estate	'
Land Parcels Contracted to be Disposed	1
Sales price-Rental Properties	$40,300

Investments_in_Partially_Owned2

Investments in Partially Owned Entities (Details) (USD $)

3 Months Ended

12 Months Ended

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Aug. 23, 2006

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Joint Venture Partner Ownership Percentage

'

'

'

'

'

'

'

80.00%

'

'

'

'

Disposed Properties

'

'

'

'

'

'

'

94

35

'

'

'

Disposed Units

'

'

'

'

'

'

'

29,180

9,012

'

'

'

Variable Interest Entity, Consolidated, Carrying Amount, Assets

'

'

'

'

'

'

'

$5,000,000

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

20.00%

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

'

'

'

'

'

'

'

3.85%

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

1-Sep-14

'

'

'

'

Preferred Interests

'

'

'

'

'

'

'

65,000,000

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets

'

'

'

1,047,545,000

'

'

'

108,000,000

1,047,545,000

'

'

'

Investment in Joint Venture

'

'

'

'

'

'

'

292,600,000

'

'

'

'

Number of Joint Ventures

'

'

'

'

'

'

'

2

'

'

'

'

Partners Payments To Acquire Equity Method Investments

'

'

'

'

'

'

'

40,100,000

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Consolidated Properties

'

'

'

'

'

'

'

19

'

'

'

'

Partially Owned Unconsolidated Properties

'

'

'

'

'

'

'

4

'

'

'

'

Partially Owned Consolidated Units

'

'

'

'

'

'

'

3,752

'

'

'

'

Partially Owned Unconsolidated Units

'

'

'

'

'

'

'

1,669

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

21,008,429,000

'

'

'

26,800,948,000

21,008,429,000

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

-4,912,221,000

'

'

'

-4,807,709,000

-4,912,221,000

'

'

'

Investment in real estate, net

'

'

'

16,096,208,000

'

'

'

21,993,239,000

16,096,208,000

'

'

'

Cash and cash equivalents

'

'

'

612,590,000

'

'

'

53,534,000

612,590,000

383,921,000

431,408,000

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

17,877,000

'

'

'

178,526,000

17,877,000

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

250,442,000

'

'

'

103,567,000

250,442,000

'

'

'

Deferred financing costs, net

'

'

'

44,382,000

'

'

'

58,486,000

44,382,000

'

'

'

Other assets

'

'

'

170,372,000

'

'

'

404,557,000

170,372,000

'

'

'

Total assets

'

'

'

17,201,000,000

'

'

'

22,834,545,000

17,201,000,000

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

3,898,369,000

'

'

'

5,174,166,000

3,898,369,000

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

38,372,000

'

'

'

118,791,000

38,372,000

'

'

'

Accrued interest payable

'

'

'

76,223,000

'

'

'

78,309,000

76,223,000

'

'

'

Other liabilities

'

'

'

304,518,000

'

'

'

347,748,000

304,518,000

'

'

'

Security Deposit Liability

'

'

'

66,988,000

'

'

'

71,592,000

66,988,000

'

'

'

Total liabilities

'

'

'

9,275,521,000

'

'

'

11,626,205,000

9,275,521,000

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

77,688,000

'

'

'

126,583,000

77,688,000

'

'

'

Total liabilities and equity

'

'

'

17,201,000,000

'

'

'

22,834,545,000

17,201,000,000

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

2,387,702,000

1,747,502,000

1,525,220,000

'

'

Depreciation

'

'

'

'

'

'

'

978,973,000

560,669,000

506,175,000

'

'

General and Administrative Expense

'

'

'

'

'

'

'

62,179,000

47,233,000

43,604,000

'

'

Operating income

120,396,000

63,977,000

104,246,000

148,247,000

142,020,000

121,745,000

102,110,000

512,288,000

514,122,000

406,509,000

'

'

Interest and Other Income

'

'

'

'

'

'

'

4,656,000

150,546,000

7,963,000

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-586,854,000

-455,236,000

-460,172,000

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

-22,197,000

-21,295,000

-16,616,000

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

-121,076,000

160,826,000

-76,452,000

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

-1,169,000

-514,000

-706,000

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

-4,159,000

-14,000

0

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

12,227,000

0

4,217,000

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

2,036,505,000

548,278,000

826,489,000

'

'

Net income

'

'

'

'

'

'

'

1,905,353,000

881,204,000

935,197,000

'

'

Consolidated Development Projects Held for and or Under Development [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Consolidated Properties

'

'

'

'

'

'

'

0

'

'

'

'

Partially Owned Consolidated Units

'

'

'

'

'

'

'

0

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

342,222,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

0

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

342,222,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

4,704,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

0

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

43,654,000

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

0

'

'

'

'

Other assets

'

'

'

'

'

'

'

5,841,000

'

'

'

'

Total assets

'

'

'

'

'

'

'

396,421,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

0

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

21,569,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

0

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

1,157,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

10,000

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

22,736,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

114,245,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

259,440,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

373,685,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

396,421,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

231,000

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

741,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

-510,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

0

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

882,000

'

'

'

'

Operating income

'

'

'

'

'

'

'

-1,392,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

2,000

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

-503,000

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-2,000

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

-1,895,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

-11,000

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

0

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

-17,000

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

0

'

'

'

'

Net income

'

'

'

'

'

'

'

-1,923,000

'

'

'

'

Consolidated Operating [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Consolidated Properties

'

'

'

'

'

'

'

19

'

'

'

'

Partially Owned Consolidated Units

'

'

'

'

'

'

'

3,752

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

673,957,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

-172,802,000

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

501,155,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

22,792,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

54,439,000

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

220,000

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

2,496,000

'

'

'

'

Other assets

'

'

'

'

'

'

'

26,899,000

'

'

'

'

Total assets

'

'

'

'

'

'

'

608,001,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

360,130,000

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

1,113,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

1,283,000

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

1,487,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

1,828,000

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

365,841,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

12,338,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

229,822,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

242,160,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

608,001,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

80,968,000

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

24,888,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

56,080,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

31,824,000

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

93,000

'

'

'

'

Operating income

'

'

'

'

'

'

'

24,163,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

3,000

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

-5,000

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-14,561,000

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

-301,000

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

9,299,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

-56,000

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

-1,387,000

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

0

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

26,673,000

'

'

'

'

Net income

'

'

'

'

'

'

'

34,529,000

'

'

'

'

Consolidated Total [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Consolidated Properties

'

'

'

'

'

'

'

19

'

'

'

'

Partially Owned Consolidated Units

'

'

'

'

'

'

'

3,752

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

1,016,179,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

-172,802,000

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

843,377,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

27,496,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

54,439,000

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

43,874,000

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

2,496,000

'

'

'

'

Other assets

'

'

'

'

'

'

'

32,740,000

'

'

'

'

Total assets

'

'

'

'

'

'

'

1,004,422,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

360,130,000

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

22,682,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

1,283,000

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

2,644,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

1,838,000

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

388,577,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

126,583,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

489,262,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

615,845,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

1,004,422,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

81,199,000

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

25,629,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

55,570,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

31,824,000

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

975,000

'

'

'

'

Operating income

'

'

'

'

'

'

'

22,771,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

5,000

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

-508,000

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-14,563,000

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

-301,000

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

7,404,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

-67,000

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

-1,387,000

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

-17,000

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

26,673,000

'

'

'

'

Net income

'

'

'

'

'

'

'

32,606,000

'

'

'

'

Unconsolidated Development Projects Held for and or Under Development [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Unconsolidated Properties

'

'

'

'

'

'

'

0

'

'

'

'

Partially Owned Unconsolidated Units

'

'

'

'

'

'

'

0

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

45,123,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

0

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

45,123,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

262,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

0

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

0

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

77,000

'

'

'

'

Other assets

'

'

'

'

'

'

'

0

'

'

'

'

Total assets

'

'

'

'

'

'

'

45,462,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

11,379,000

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

4,433,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

23,000

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

339,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

0

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

16,174,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

27,858,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

1,430,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

29,288,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

45,462,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

0

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

135,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

-135,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

0

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

0

'

'

'

'

Operating income

'

'

'

'

'

'

'

-135,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

0

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

0

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

0

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

-135,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

0

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

0

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

0

'

'

'

'

Net income

'

'

'

'

'

'

'

-135,000

'

'

'

'

Unconsolidated Completed, Not Stabilized [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Unconsolidated Properties

'

'

'

'

'

'

'

3

'

'

'

'

Partially Owned Unconsolidated Units

'

'

'

'

'

'

'

1,333

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

284,264,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

-1,887,000

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

282,377,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

1,505,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

0

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

95,000

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

129,000

'

'

'

'

Other assets

'

'

'

'

'

'

'

355,000

'

'

'

'

Total assets

'

'

'

'

'

'

'

284,461,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

172,279,000

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

3,844,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

693,000

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

572,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

222,000

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

177,610,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

73,902,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

32,949,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

106,851,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

284,461,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

6,629,000

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

3,554,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

3,075,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

1,887,000

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

53,000

'

'

'

'

Operating income

'

'

'

'

'

'

'

1,135,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

0

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

0

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-1,886,000

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

-751,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

0

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

0

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

0

'

'

'

'

Net income

'

'

'

'

'

'

'

-751,000

'

'

'

'

Unconsolidated Operating [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Unconsolidated Properties

'

'

'

'

'

'

'

1

'

'

'

'

Partially Owned Unconsolidated Units

'

'

'

'

'

'

'

336

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

55,545,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

-4,605,000

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

50,940,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

1,377,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

0

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

47,000

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

4,000

'

'

'

'

Other assets

'

'

'

'

'

'

'

871,000

'

'

'

'

Total assets

'

'

'

'

'

'

'

53,239,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

30,550,000

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

164,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

0

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

768,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

105,000

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

31,587,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

20,450,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

1,202,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

21,652,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

53,239,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

4,597,000

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

1,949,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

2,648,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

4,605,000

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

201,000

'

'

'

'

Operating income

'

'

'

'

'

'

'

-2,158,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

10,000

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

0

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-941,000

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

-1,000

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

-3,090,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

0

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

0

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

0

'

'

'

'

Net income

'

'

'

'

'

'

'

-3,090,000

'

'

'

'

Unconsolidated Total [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Unconsolidated Properties

'

'

'

'

'

'

'

4

'

'

'

'

Partially Owned Unconsolidated Units

'

'

'

'

'

'

'

1,669

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate Investment Property, at Cost

'

'

'

'

'

'

'

384,932,000

'

'

'

'

Real Estate Investment Property, Accumulated Depreciation

'

'

'

'

'

'

'

-6,492,000

'

'

'

'

Investment in real estate, net

'

'

'

'

'

'

'

378,440,000

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

3,144,000

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

0

'

'

'

'

Restricted Cash and Cash Equivalents

'

'

'

'

'

'

'

142,000

'

'

'

'

Deferred financing costs, net

'

'

'

'

'

'

'

210,000

'

'

'

'

Other assets

'

'

'

'

'

'

'

1,226,000

'

'

'

'

Total assets

'

'

'

'

'

'

'

383,162,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

214,208,000

'

'

'

'

Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable

'

'

'

'

'

'

'

8,441,000

'

'

'

'

Accrued interest payable

'

'

'

'

'

'

'

716,000

'

'

'

'

Other liabilities

'

'

'

'

'

'

'

1,679,000

'

'

'

'

Security Deposit Liability

'

'

'

'

'

'

'

327,000

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

225,371,000

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

122,210,000

'

'

'

'

Parent Equity Interest

'

'

'

'

'

'

'

35,581,000

'

'

'

'

Total Equity Interest

'

'

'

'

'

'

'

157,791,000

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

383,162,000

'

'

'

'

Partially Owned Property Income Statement Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Operating revenue

'

'

'

'

'

'

'

11,226,000

'

'

'

'

Operating Expenses

'

'

'

'

'

'

'

5,638,000

'

'

'

'

Gross Profit

'

'

'

'

'

'

'

5,588,000

'

'

'

'

Depreciation

'

'

'

'

'

'

'

6,492,000

'

'

'

'

General and Administrative Expense

'

'

'

'

'

'

'

254,000

'

'

'

'

Operating income

'

'

'

'

'

'

'

-1,158,000

'

'

'

'

Interest and Other Income

'

'

'

'

'

'

'

10,000

'

'

'

'

Other Nonoperating Income (Expense)

'

'

'

'

'

'

'

0

'

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Expense incurred, net

'

'

'

'

'

'

'

-2,827,000

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

-1,000

'

'

'

'

(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations

'

'

'

'

'

'

'

-3,976,000

'

'

'

'

Income and other tax (expense) benefit

'

'

'

'

'

'

'

0

'

'

'

'

(Loss) from investments in unconsolidated entities due to operations

'

'

'

'

'

'

'

0

'

'

'

'

Net gain on sales of land parcels

'

'

'

'

'

'

'

0

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

0

'

'

'

'

Net income

'

'

'

'

'

'

'

-3,976,000

'

'

'

'

Residual JV [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Initial Basis of Real Estate, Unconsolidated

'

'

'

'

'

'

'

-113,600,000

'

'

'

'

Joint Venture Partner [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Land purchase price

'

'

'

'

'

'

'

57,900,000

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets

'

'

'

'

'

'

'

75,700,000

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interests - Partially Owned Properties

'

'

'

'

'

'

'

111,700,000

'

'

'

'

Company's Portion [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Land purchase price

'

'

'

'

'

'

'

76,100,000

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets

'

'

'

'

'

'

'

102,500,000

'

'

'

'

Nexus Sawgrass [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Project Cost

'

'

'

'

'

'

'

80,000,000

'

'

'

'

Maximum Debt Commitment

'

'

'

'

'

'

'

48,700,000

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

'

'

'

5.60%

'

'

'

'

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

1-Jan-21

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

47,600,000

'

'

'

'

Domain [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Project Cost

'

'

'

'

'

'

'

154,600,000

'

'

'

'

Maximum Debt Commitment

'

'

'

'

'

'

'

98,600,000

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

'

'

'

5.75%

'

'

'

'

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

1-Jan-22

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

91,600,000

'

'

'

'

Archstone Transaction [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Liquidation Value Preferred Interests

'

'

'

'

'

'

'

89,000,000

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

60.00%

'

'

'

'

Joint Venture Partner Ownership Percentage

'

'

'

'

'

'

'

40.00%

'

'

'

'

Company's Portion [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Interests

'

'

'

'

'

'

'

39,000,000

'

'

'

'

Enclave at Wellington [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

95.00%

'

'

'

'

Initial Basis of Real Estate, Consolidated

'

'

'

'

'

'

'

26,200,000

'

'

'

'

Partially Owned Consolidated Units To Be Developed

'

'

'

'

'

'

'

268

'

'

'

'

Project Cost

'

'

'

'

'

'

'

50,000,000

'

'

'

'

East Palmetto Park [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

90.00%

'

'

'

'

Initial Basis of Real Estate, Consolidated

'

'

'

'

'

'

'

20,200,000

'

'

'

'

Partially Owned Consolidated Units To Be Developed

'

'

'

'

'

'

'

377

'

'

'

'

Wisconsin Place [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

75.00%

'

'

'

'

Initial Basis of Real Estate, Consolidated

'

'

'

'

'

'

'

198,500,000

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Consolidated Units

'

'

'

'

'

'

'

432

'

'

'

'

ASSETS

'

'

'

'

'

'

'

'

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

'

'

'

'

'

'

'

56,500,000

'

'

'

'

San Norterra [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Project Cost

'

'

'

'

'

'

'

56,300,000

'

'

'

'

Partially Owned Unconsolidated Units To Be Developed

'

'

'

'

'

'

'

388

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

85.00%

'

'

'

'

Initial Basis of Real Estate, Unconsolidated

'

'

'

'

'

'

'

16,900,000

'

'

'

'

Maximum Debt Commitment

'

'

'

'

'

'

'

34,800,000

'

'

'

'

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

6-Jan-15

'

'

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'LIBOR plus 2.00%

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

33,000,000

'

'

'

'

Waterton Tenside [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

20.00%

'

'

'

'

Initial Basis of Real Estate, Unconsolidated

'

'

'

'

'

'

'

5,100,000

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

'

'

'

3.66%

'

'

'

'

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

1-Dec-18

'

'

'

'

Partially Owned Property Balance Sheet Schedule

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Unconsolidated Units

'

'

'

'

'

'

'

336

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

30,600,000

'

'

'

'

Parkside at Emeryville [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Project Cost

'

'

'

'

'

'

'

75,000,000

'

'

'

'

Partially Owned Unconsolidated Units To Be Developed

'

'

'

'

'

'

'

176

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

5.00%

'

'

'

'

Initial Basis of Real Estate, Unconsolidated

'

'

'

'

'

'

'

-2,100,000

'

'

'

'

Maximum Debt Commitment

'

'

'

'

'

'

'

39,500,000

'

'

'

'

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

14-Aug-15

'

'

'

'

Unconsolidated Project Under Development Commitment Fund

'

'

'

'

'

'

'

19,700,000

'

'

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'LIBOR plus 2.25%

'

'

'

'

LIABILITIES AND EQUITY

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

11,400,000

'

'

'

'

Joint Venture Partner [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Disposed Properties

'

'

'

'

'

'

'

'

2

'

'

'

Disposed Units

'

'

'

'

'

'

'

'

441

'

'

'

Interest:

'

'

'

'

'

'

'

'

'

'

'

'

Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax

'

'

'

'

'

'

'

'

$21,300,000

'

'

'

London Interbank Offered Rate (LIBOR) [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'LIBOR plus 1.75%

'LIBOR plus 0.50%

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

1.75%

'

'

'

'

London Interbank Offered Rate (LIBOR) [Member] | San Norterra [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

2.00%

'

'

'

'

London Interbank Offered Rate (LIBOR) [Member] | Parkside at Emeryville [Domain]

'

'

'

'

'

'

'

'

'

'

'

'

Investments In Partially Owned Entities (Textuals) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

2.25%

'

'

'

'

Deposits_Restricted_Details

Deposits - Restricted (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Restricted Cash and Cash Equivalents Items [Line Items]	'	'
Tax Deferred Exchange Proceeds	$0	$152,182
Earnest Money On Acquisitions	4,514	5,613
Restricted deposits on real estate investments	53,771	44,209
Resident security and utility deposits	44,777	44,199
Other Restricted Cash	505	4,239
Restricted Cash and Cash Equivalents	$103,567	$250,442

Debt_Mortgage_Notes_Payable_De

Debt Mortgage Notes Payable (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 23, 2006
Debt Instrument [Line Items]	'	'	'	'
Mortgage notes payable	$5,174,166,000	$3,898,369,000	'	'
Repayments Of Mortgage Notes Payable	12,658,000	14,088,000	16,726,000	'
Debt Instrument, Interest Rate, Stated Percentage	'	'	'	3.85%
Assumed mortgage debt	34,100,000	137,600,000	'	'
Debt Instrument, Maturity Date	1-Sep-14	'	'	'
Properties Collateralized	1	'	'	'
Mark-to-Market Debt Premiums	127,900,000	'	'	'
Proceeds from Issuance of Long-term Debt	902,886,000	26,495,000	190,905,000	'
Prepayment Penalty Charges	222,400,000	300,000	'	'
Write-off of unamortized deferred financing costs	7,400,000	1,600,000	'	'
Write off unamortized (premium) discount	-110,500,000	'	'	'
Various period of outstanding mortgage indebtedness	'	'June 15, 2051	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.03%	0.11%	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	7.25%	11.25%	'	'
Weighted Average Mortgage Debt Interest Rate	4.23%	4.96%	'	'
Historical cost, net of accumulated depreciation, of encumbered properties	7,300,000,000	4,400,000,000	'	'
Properties acquired	'	1	'	'
New York Life Loan [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	4.21%	'	'	'
Debt Instrument, Maturity Date	10-Nov-23	'	'	'
Proceeds from Issuance of Long-term Debt	800,000,000	'	'	'
Properties Acquired with Debt [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Properties acquired	'	2	'	'
London Interbank Offered Rate (LIBOR) [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Description of Variable Rate Basis	'LIBOR plus 1.75%	'LIBOR plus 0.50%	'	'
Debt Instrument, Basis Spread on Variable Rate	1.75%	'	'	'
Credit enhanced debt [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Mortgage notes payable	700,500,000	362,200,000	'	'
Secured Debt [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Repayments Of Mortgage Notes Payable	2,500,000,000	364,300,000	'	'
Other Debt Obligations [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Assumed mortgage debt	339,000,000	'	'	'
Debt Instrument, Maturity Date	1-May-61	'	'	'
Properties Collateralized	3	'	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.10%	'	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	5.24%	'	'	'
Fannie Mae Pool 3 And 4 [Domain]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Assumed mortgage debt	2,200,000,000	'	'	'
Write off unamortized (premium) discount	113,600,000	'	'	'
Fannie Mae Pool 3 [Domain]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	6.26%	'	'	'
Assumed mortgage debt	1,200,000,000	'	'	'
Debt Instrument, Maturity Date	1-Nov-17	'	'	'
Properties Collateralized	16	'	'	'
Fannie Mae Pool 3 [Domain] | Secured Debt [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Repayments Of Mortgage Notes Payable	825,000,000	'	'	'
Fannie Mae Pool 4 [Domain]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	5.88%	'	'	'
Assumed mortgage debt	963,500,000	'	'	'
Debt Instrument, Maturity Date	1-Nov-14	'	'	'
Properties Collateralized	15	'	'	'
Fannie Mae Pool 4 [Domain] | Secured Debt [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Repayments Of Mortgage Notes Payable	963,500,000	'	'	'
Nontaxable Municipal Bonds [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Assumed mortgage debt	$346,600,000	'	'	'
Debt Instrument, Maturity Date	15-Nov-36	'	'	'
Properties Collateralized	4	'	'	'
Nontaxable Municipal Bonds [Member] | Minimum [Member] | SIFMA [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Description of Variable Rate Basis	'SIFMA plus 0.860%	'	'	'
Debt Instrument, Basis Spread on Variable Rate	0.86%	'	'	'
Nontaxable Municipal Bonds [Member] | Maximum [Member] | SIFMA [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Description of Variable Rate Basis	'SIFMA plus 1.402%	'	'	'
Debt Instrument, Basis Spread on Variable Rate	1.40%	'	'	'

Debt_Notes_Details

Debt Notes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 23, 2006
Debt Instrument [Line Items]	'	'	'	'
Interest Rate Derivatives, at Fair Value, Net	'	$300,000,000	'	'
Debt Instrument, Interest Rate, Stated Percentage	'	'	'	3.85%
Debt Instrument, Maturity Date	1-Sep-14	'	'	'
Repayments of Notes Payable	400,000,000	975,991,000	575,641,000	'
Term Loan Facility Spread	1.20%	'	'	'
Summary of Company's unsecured note balances and certain interest rate and maturity date information	'	'	'	'
Notes, net	5,477,088,000	4,630,875,000	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.03%	0.11%	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	7.25%	11.25%	'	'
Fixed Rate Public or Private Notes [Member]	'	'	'	'
Summary of Company's unsecured note balances and certain interest rate and maturity date information	'	'	'	'
Notes, net	4,727,088,000	4,329,352,000	'	'
Weighted Average Interest Rate	5.55%	5.70%	'	'
Floating Rate Public or Private Notes [Member]	'	'	'	'
Summary of Company's unsecured note balances and certain interest rate and maturity date information	'	'	'	'
Notes, net	750,000,000	301,523,000	'	'
Weighted Average Interest Rate	1.58%	1.83%	'	'
Five Point Two Zero Percentage Fixed Rate Tax Exempt Notes [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Face Amount	'	400,000,000	'	'
Debt Instrument, Interest Rate, Stated Percentage	'	5.20%	'	'
Debt Instrument, Maturity Date	'	1-Apr-13	'	'
5.200% Notes [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	5.20%	'	'	'
Repayments of Notes Payable	400,000,000	'	'	'
DelayedDrawTermLoan [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Term Loan Principal Amount	$750,000,000	'	'	'
Floating Rate Public or Private Notes [Member]	'	'	'	'
Summary of Company's unsecured note balances and certain interest rate and maturity date information	'	'	'	'
Debt Instrument, Maturity Date Range, Start	1-Jan-15	1-Jan-13	'	'
Debt Instrument, Maturity Date Range, End	31-Dec-15	31-Dec-13	'	'
Fixed Rate Public or Private Notes [Member]	'	'	'	'
Summary of Company's unsecured note balances and certain interest rate and maturity date information	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	3.00%	4.63%	'	'
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	7.57%	7.57%	'	'
Debt Instrument, Maturity Date Range, Start	1-Jan-14	1-Jan-13	'	'
Debt Instrument, Maturity Date Range, End	31-Dec-26	31-Dec-26	'	'

Debt_Notes_Details_Textuals

Debt Notes (Details) [Textuals] (USD $)

12 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Aug. 18, 2011

Aug. 23, 2006

Dec. 31, 2013

Dec. 31, 2013

Aug. 17, 2006

Aug. 18, 2011

Aug. 23, 2006

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

3.00% Notes [Member]

5.200% Notes [Member]

Convertible Debt [Member]

Convertible Debt [Member]

Convertible Debt [Member]

Term Loan [Member]

Term Loan [Member]

Bridge Loan [Member]

DelayedDrawTermLoan [Member]

6.625% Notes [Member]

5.500% Notes [Member]

Bridge Loan [Member]

Nontaxable Municipal Bonds [Member]

SIFMA [Member]

SIFMA [Member]

London Interbank Offered Rate (LIBOR) [Member]

London Interbank Offered Rate (LIBOR) [Member]

Term Loan [Member]

Nontaxable Municipal Bonds [Member]

Nontaxable Municipal Bonds [Member]

London Interbank Offered Rate (LIBOR) [Member]

Minimum [Member]

Maximum [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'SIFMA plus 0.860%

'SIFMA plus 1.402%

'LIBOR plus 1.75%

'LIBOR plus 0.50%

'LIBOR plus 1.20%

Repayments of Notes Payable

$400,000,000

$975,991,000

$575,641,000

'

'

'

$400,000,000

'

'

'

'

'

'

'

$253,900,000

$222,100,000

'

'

'

'

'

'

'

Stated interest rate

'

'

'

'

3.85%

3.00%

5.20%

'

'

3.85%

'

'

'

'

6.63%

5.50%

'

'

'

'

'

'

'

Unsecured Notes, face amount

'

'

'

'

'

'

'

'

'

'

500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Maturity period of interest rate notes

1-Sep-14

'

'

'

'

'

'

15-Aug-26

'

'

'

5-Oct-12

'

'

'

'

'

15-Nov-36

'

'

'

'

'

Convertible Debt

'

'

'

482,500,000

650,000,000

'

'

'

482,500,000

650,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds

1,245,550,000

0

996,190,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Bridge Loan Principal Amount

'

2,500,000,000

1,000,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Fee Amount

'

10,900,000

2,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

8,400,000

'

'

'

'

'

'

Convertible senior subordinated notes conversion ratio

'

'

'

'

'

'

'

16.3934

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible senior subordinated notes, base conversion price

'

'

'

'

'

'

'

'

'

1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument convertible conversion price per share

'

'

'

'

'

'

'

'

'

$61

'

'

'

'

'

'

'

'

'

'

'

'

'

Term Loan Facility Spread

1.20%

'

'

'

'

'

'

'

'

'

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

Write-off of unamortized deferred financing costs

7,400,000

1,600,000

'

'

'

'

'

'

'

'

1,000,000

'

0

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Unsecured Debt

500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Debt, Net of Issuance Costs

495,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum

4.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Term Loan Principal Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

$750,000,000

'

'

'

'

'

'

'

'

'

Debt_Lines_of_Credit_Details

Debt Lines of Credit (Details) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

A 175 billion LOC [Member]

A 175 billion LOC [Member]

A 250 billion LOC [Member] [Domain]

$1.25 billion LOC [Member]

$1.25 billion LOC [Member]

$1.425 Billion LOC [Member]

$1.425 Billion LOC [Member]

Revolving Credit Facility [Member]

London Interbank Offered Rate (LIBOR) [Member]

London Interbank Offered Rate (LIBOR) [Member]

Line of Credit [Member]

Line of Credit [Member]

London Interbank Offered Rate (LIBOR) [Member]

London Interbank Offered Rate (LIBOR) [Member]

Line of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unsecured revolving credit facility

'

'

'

$1,750,000,000

$2,500,000,000

$1,750,000,000

$1,250,000,000

'

$1,425,000,000

'

'

'

'

'

Debt Instrument, Maturity Date

1-Sep-14

'

'

'

1-Apr-18

'

'

'

'

'

'

'

'

'

500.0 million ability to increase

500,000,000

'

'

'

'

'

500,000,000

'

'

'

'

'

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'

'

'

'LIBOR plus 1.75%

'LIBOR plus 0.50%

'LIBOR plus 1.05%

'LIBOR plus 1.15%

Line Of Credit Facility Commitment Fee

'

'

'

'

'

'

'

'

'

'

'

'

'15 Basis Points

'

Advances under credit facility, rate plus spread

'

'

'

'

'

1.15%

'

'

'

1.05%

'

'

'

'

Line of Credit Maturity

'

'

'

'

'

'

13-Jul-14

'

1-Feb-12

'

'

'

'

'

Increase to Line of Credit

'

'

'

'

'

500,000,000

'

'

'

'

'

'

'

'

Line of Credit Facility, Commitment Fee Percentage

'

'

'

'

'

0.20%

'

'

'

'

'

'

'

'

Write Off Of Unamortized Deferred Financing Costs

'

'

'

'

'

'

'

200,000

'

'

'

'

'

'

Remaining borrowing capacity

'

'

1,720,000,000

'

2,350,000,000

'

'

'

'

'

'

'

'

'

Amount restricted/dedicated to support letters of credit

'

'

30,200,000

'

34,900,000

'

'

'

'

'

'

'

'

'

Long-term Line of Credit

$115,000,000

$0

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average interest rate on revolving letter of credit

'

'

1.35%

'

1.26%

'

'

'

'

'

'

'

'

'

Debt_Other_Details

Debt Other (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$561,084
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,170,448
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,193,251
Long-term Debt, Maturities, Repayments of Principal in Year Four	1,347,191
Long-term Debt, Maturities, Repayments of Principal in Year Five	297,016
Long-term Debt, Maturities, Repayments of Principal after Year Five	6,209,697
Debt Instrument, Unamortized Discount	-12,433
Total Secured and Unsecured Debt	$10,766,254

Derivative_and_Other_Fair_Valu2

Derivative and Other Fair Value Instruments (Details) (Forward Starting Swaps [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Forward Starting Swaps [Member]	'
Derivative [Line Items]	'
Current Notional Balance	$400,000
Lowest Possible Notional	400,000
Highest Possible Notional	$400,000
Lowest Interest Rate	2.13%
Highest Interest Rate	3.23%
Earliest Maturity Date	'2024
Latest Maturity Date	'2024

Derivative_and_Other_Fair_Valu3

Derivative and Other Fair Value Instruments (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, fair value	$18,712	$1,523
Fair Value Of Serp Investments	83,845	70,655
Other Assets, Fair Value Disclosure	'	2,214
Assets, Fair Value Disclosure	102,557	74,392
Derivative liability, fair value	'	44,050
Other Liabilities, Fair Value Disclosure	83,845	70,655
Liabilities, Fair Value Disclosure	83,845	114,705
Redeemable Noncontrolling Interest Operating Partnership Liability Fair Value Disclosure	363,144	398,372
Fair Value, Inputs, Level 1 [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, fair value	0	0
Fair Value Of Serp Investments	83,845	70,655
Other Assets, Fair Value Disclosure	'	2,214
Assets, Fair Value Disclosure	83,845	72,869
Derivative liability, fair value	'	0
Other Liabilities, Fair Value Disclosure	83,845	70,655
Liabilities, Fair Value Disclosure	83,845	70,655
Redeemable Noncontrolling Interest Operating Partnership Liability Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, fair value	18,712	1,523
Fair Value Of Serp Investments	0	0
Other Assets, Fair Value Disclosure	'	0
Assets, Fair Value Disclosure	18,712	1,523
Derivative liability, fair value	'	44,050
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	44,050
Redeemable Noncontrolling Interest Operating Partnership Liability Fair Value Disclosure	363,144	398,372
Fair Value, Inputs, Level 3 [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, fair value	0	0
Fair Value Of Serp Investments	0	0
Other Assets, Fair Value Disclosure	'	0
Assets, Fair Value Disclosure	0	0
Derivative liability, fair value	'	0
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Redeemable Noncontrolling Interest Operating Partnership Liability Fair Value Disclosure	$0	$0

Derivative_and_Other_Fair_Valu4

Derivative and Other Fair Value Instruments (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	($1,523)	($7,448)	($3,549)
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	1,523	7,448	3,549
Effective Portion - Amount of Gain/ (Loss) Recognized in OCI on Derivative	18,771	-11,772	-143,768
Effective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income	-20,141	-14,678	-4,343
Ineffective Portion - Amount of Gain/ (Loss) Reclassifed from Accumulated OCI into Income	0	0	-170
Interest Rate Swap [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	-1,523	-7,448	-3,549
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	1,523	7,448	3,549
Derivative, Description of Hedged Item	'Fixed rate debt	'Fixed rate debt	'Fixed rate debt
Forward Starting Swaps/Treasury Locks [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Effective Portion - Amount of Gain/ (Loss) Recognized in OCI on Derivative	18,771	-11,772	-145,090
Effective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income	-20,141	-14,678	-4,343
Ineffective Portion - Amount of Gain/ (Loss) Reclassifed from Accumulated OCI into Income	0	0	-170
Development Interest Rate Swaps/Caps [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Effective Portion - Amount of Gain/ (Loss) Recognized in OCI on Derivative	'	'	1,322
Effective Portion - Amount of Gain/ (Loss) Reclassified from Accumulated OCI into Income	'	'	0
Ineffective Portion - Amount of Gain/ (Loss) Reclassifed from Accumulated OCI into Income	'	'	$0

Derivative_and_Other_Fair_Valu5

Derivative and Other Fair Value Instruments (Details 4) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Available for Sale	'	'	'
Other assets, amortized cost	$0	$675	'
Other assets, Unrealized Gains	0	1,539	'
Other assets, Unrealized Losses	0	0	'
Other assets, Book/Fair value	0	2,214	'
Interest and Other income	2,122	0	'
Proceeds from Sale of Available-for-sale Securities	4,878	0	4,537
Gain on Sale of Securities, Net	-2,122	0	0
Available-for-sale Securities [Member]	'	'	'
Available for Sale	'	'	'
Other assets, amortized cost	0	675	'
Other assets, Unrealized Gains	0	1,539	'
Other assets, Unrealized Losses	0	0	'
Other assets, Book/Fair value	0	2,214	'
Interest and Other income	2,122	0	'
Available-for-sale Securities [Member]	'	'	'
Available for Sale	'	'	'
Gain on Sale of Securities, Net	2,100	'	'
Available-for-sale Securities [Member]	'	'	'
Available for Sale	'	'	'
Proceeds from Sale of Available-for-sale Securities	$2,800	'	'

Derivative_and_Other_Fair_Valu6

Derivative and Other Fair Value Instruments (Details Textuals) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
			Four Point Six Two Five Fixed Rate Public Notes [Member]	Total Note Payable and Long-Term Line of Credit [Member]
Derivative [Line Items]	'	'	'	'
Mortgage notes payable	$5,174,166,000	$3,898,369,000	'	'
Notes, net	5,477,088,000	4,630,875,000	'	5,592,088,000
Fair value of mortgage notes payable	5,100,000,000	4,300,000,000	'	'
Fair value of unsecured notes payable including line of credit	5,900,000,000	5,200,000,000	'	'
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	-155,800,000	-194,700,000	'	'
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	21,800,000	'	'	'
Payments for (Proceeds from) Hedge, Investing Activities	44,700,000	'	153,200,000	'
Debt Instrument, Face Amount	'	'	1,000,000,000	'
Proceeds from Issuance of Unsecured Debt	500,000,000	'	'	'
Interest Expense	700,000	'	5,900,000	'
Charges Hedge Termination Activities	44,000,000	'	147,100,000	'
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	'	'	$200,000	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
(Loss) income from continuing operations	'	($13,465)	($58,511)	($165,339)	$100,763	$91,269	($6,340)	($25,394)	($168,174)	$160,298	($72,941)
Income (Loss) Attributable to Noncontrolling Interest	'	'	'	'	'	'	'	'	6,834	-6,417	3,880
Net loss (income) attributable to Noncontrolling Interests - Partially Owned Properties	'	'	'	'	'	'	'	'	538	-844	-832
Dividends, Preferred Stock	'	'	'	'	'	'	'	'	-4,145	-10,355	-13,865
Redemption Premium	'	'	'	'	'	'	'	'	0	-5,152	0
Income From Continuing Operations Available To Common Shares	'	'	'	'	'	'	'	'	'	143,947	'
Income (Loss) from Continuing Operations Attributable to Parent	'	'	'	'	'	'	'	'	-164,947	137,530	-83,758
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	'	'	'	'	'	'	'	'	1,991,415	688,682	963,478
Net Income Loss Available To Common Stockholder Basic	'	'	'	'	'	'	'	'	1,826,468	826,212	879,720
Discontinued operations, net	'	405,182	395,243	1,226,373	283,636	145,054	114,655	177,561	2,073,527	720,906	1,008,138
Net Income (Loss) Available to Common Stockholders, Diluted	'	'	'	'	'	'	'	'	1,826,468	864,853	879,720
Weighted Average Number of Shares Outstanding, Basic	359,919	359,811	359,653	337,532	310,398	301,336	300,193	298,805	354,305	302,701	294,856
Dilutive Op Units	'	'	'	'	'	'	'	'	'	13,853	'
Dilutive Securities Options	'	'	'	'	'	'	'	'	'	3,212	'
Weighted average Common Shares outstanding	375,860	359,811	359,653	337,532	327,108	318,773	300,193	298,805	354,305	319,766	294,856
Earnings Per Share, Basic	$0.31	$1.05	$0.90	$3.01	$1.18	$0.73	$0.33	$0.47	$5.16	$2.73	$2.98
Earnings Per Share, Diluted	$0.30	$1.05	$0.90	$3.01	$1.17	$0.72	$0.33	$0.47	$5.16	$2.71	$2.98
(Loss) income from continuing operations available to Common Shares	'	'	'	'	'	'	'	'	($0.47)	$0.45	($0.28)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	'	'	'	'	'	'	'	'	$5.62	$2.27	$3.27
(Loss) income from Continuing Operations, Per Diluted Share	'	'	'	'	'	'	'	'	($0.47)	$0.45	($0.28)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	'	'	'	'	'	'	'	'	$5.62	$2.25	$3.27
Common Stock, Dividends, Per Share, Declared	'	'	'	'	'	'	'	'	$1.85	$1.78	$1.58
OPERATING PARTNERSHIP	'	'	'	'	'	'	'	'	'	'	'
(Loss) income from continuing operations	'	'	'	'	'	'	'	'	-168,174	160,298	-72,941
Net loss (income) attributable to Noncontrolling Interests - Partially Owned Properties	'	'	'	'	'	'	'	'	538	-844	-832
Redemption Premium	'	'	'	'	'	'	'	'	0	-5,152	0
Discontinued operations, net	'	'	'	'	'	'	'	'	2,073,527	720,906	1,008,138
Dilutive Securities Options	'	'	'	'	'	'	'	'	'	3,212	'
Earnings Per Share, Basic	'	'	'	'	'	'	'	'	$5.16	$2.73	$2.98
Earnings Per Share, Diluted	'	'	'	'	'	'	'	'	$5.16	$2.71	$2.98
(Loss) income from continuing operations available to Common Shares	'	'	'	'	'	'	'	'	($0.47)	$0.45	($0.28)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	'	'	'	'	'	'	'	'	$5.62	$2.27	$3.27
(Loss) income from Continuing Operations, Per Diluted Share	'	'	'	'	'	'	'	'	($0.47)	$0.45	($0.28)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	'	'	'	'	'	'	'	'	$5.62	$2.25	$3.27
Dividend preference units	'	'	'	'	'	'	'	'	-4,145	-10,355	-13,865
Income Loss From Continuing Operations Available To Units	'	'	'	'	'	'	'	'	-171,781	143,947	-87,638
Net Income loss available to Op unitholders basic diluted numerator	'	'	'	'	'	'	'	'	$1,901,746	$864,853	$920,500
Weighted Average Limited Partnership and General Partnership Units Outstanding, Basic	'	'	'	'	'	'	'	'	368,038	316,554	308,062
Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Diluted	'	'	'	'	'	'	'	'	368,038	319,766	308,062
Distributions Per Limited Partnership and General Partnership Unit, Outstanding, Basic	'	'	'	'	'	'	'	'	$1.85	$1.78	$1.58

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended							12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES	'	'	'	'	'	'	'	'	'	'
Disposal Group Including Discontinued Operation Rental Revenue	'	'	'	'	'	'	'	$121,942,000	$445,832,000	$560,399,000
Disposal Group, Including Discontinued Operation, Revenue	'	'	'	'	'	'	'	121,942,000	445,832,000	560,399,000
EXPENSES	'	'	'	'	'	'	'	'	'	'
Disposal Group Including Discontinued Operation Property And Maintenance	'	'	'	'	'	'	'	36,792,000	103,371,000	160,315,000
Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance	'	'	'	'	'	'	'	11,903,000	41,208,000	50,173,000
Disposal Group Including Discontinued Operations Property Management	'	'	'	'	'	'	'	1,000	211,000	266,000
Disposal Group Including Discontinued Operation Depreciation	'	'	'	'	'	'	'	34,380,000	124,323,000	157,441,000
Disposal Group Including Discontinued Operation General And Administrative	'	'	'	'	'	'	'	85,000	92,000	55,000
Disposal Group, Including Discontinued Operation, Operating Expense	'	'	'	'	'	'	'	83,161,000	269,205,000	368,250,000
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	'	'	'	'	'	'	'	38,781,000	176,627,000	192,149,000
Disposal Group Including Discontinued Operation Interest And Other Income	'	'	'	'	'	'	'	217,000	156,000	198,000
Disposal Group Including Discontinued Operation Other Expenses	'	'	'	'	'	'	'	-3,000	-170,000	-421,000
Interest:	'	'	'	'	'	'	'	'	'	'
Expense incurred, net	'	'	'	'	'	'	'	-1,296,000	-3,811,000	-9,268,000
Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs	'	'	'	'	'	'	'	-228,000	-140,000	-1,230,000
Discontinued Operation, Tax Effect of Discontinued Operation	'	'	'	'	'	'	'	-449,000	-34,000	221,000
Income Loss From Discontinued Operations	'	'	'	'	'	'	'	37,022,000	172,628,000	181,649,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	'	'	'	'	'	'	'	2,036,505,000	548,278,000	826,489,000
Discontinued operations, net	405,182,000	395,243,000	1,226,373,000	283,636,000	145,054,000	114,655,000	177,561,000	2,073,527,000	720,906,000	1,008,138,000
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net	'	'	'	'	'	'	'	2,000,000,000	'	'
Disposal Group Including Discontinued Operation Mortgage Notes Payable	'	'	'	$34,400,000	'	'	'	'	$34,400,000	'

Share_Incentive_Plans_Details

Share Incentive Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation information	'	'	'
Compensation Expense	$35,474	$24,832	$21,177
Compensation Capitalized	2,545	2,128	2,305
Compensation Equity	38,019	26,960	23,482
Dividends Incurred	1,487	1,183	1,320
Restricted shares [Member]	'	'	'
Compensation information	'	'	'
Compensation Expense	12,185	8,014	8,041
Compensation Capitalized	1,079	922	1,061
Compensation Equity	13,264	8,936	9,102
Dividends Incurred	967	949	1,121
Long Term Incentive Plan Units [Member]	'	'	'
Compensation information	'	'	'
Compensation Expense	13,108	5,004	3,344
Compensation Capitalized	501	303	297
Compensation Equity	13,609	5,307	3,641
Dividends Incurred	520	234	199
Employee Stock Option [Member]	'	'	'
Compensation information	'	'	'
Compensation Expense	9,569	10,970	8,711
Compensation Capitalized	945	782	834
Compensation Equity	10,514	11,752	9,545
Dividends Incurred	0	0	0
Employee Share Purchase Plan Discount [Member]	'	'	'
Compensation information	'	'	'
Compensation Expense	612	844	1,081
Compensation Capitalized	20	121	113
Compensation Equity	632	965	1,194
Dividends Incurred	$0	$0	$0

Share_Incentive_Plans_Details_

Share Incentive Plans (Details 1) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]	'	'	'
Common Shares Subject to Options, Beginning Balance	8,115,255	8,594,020	10,106,488
Common Shares Subject to Options, Awards granted	1,006,444	1,164,484	1,491,311
Stock Options Exercised	-586,017	-1,608,425	-2,945,950
Common Shares Subject to Options, Awards forfeited	-47,819	-23,795	-41,559
Common Shares Subject to Options, Awards expired	-17,331	-11,029	-16,270
Common Shares Subject to Options, Ending Balance	8,470,532	8,115,255	8,594,020
Weighted Average Exercise Price per option, Beginning Balance	$41.31	$36.81	$33
Weighted Average Exercise Price per option, Awards granted	$55.07	$60.22	$53.70
Weighted Average Exercise Price per option, Awards exercised/vested	$29.34	$30.87	$32.27
Weighted Average Exercise Price per option, Awards forfeited	$56.16	$51.55	$35.14
Weighted Average Exercise Price per option, Awards expired	$47.51	$35.53	$44.13
Weighted Average Exercise Price per option, Ending Balance	$43.67	$41.31	$36.81
Restricted Shares, Beginning Balance	524,953	697,510	911,950
Restricted Shares, Awards granted	246,731	140,980	170,588
Restricted share grants vested	253,816	300,809	-258,068
Restricted Shares, Awards forfeited	-17,634	-12,728	-126,960
Restricted Shares, Awards Expired	0	0	0
Restricted Shares, Ending Balance	500,234	524,953	697,510
Weighted Average Fair Value per Restricted Share, Beginning Balance	$46.81	$34.17	$32.05
Weighted Average Fair Value per Restricted Share, Awards granted	$55.37	$60.20	$53.99
Weighted Average Fair Value per Restricted Share, Awards exercised/vested	$36.81	$23.79	$38.32
Weighted Average Fair Value per Restricted Share, Awards forfeited	$55.74	$46.25	$37.19
Weighted Average Fair Value per Restricted Share, Awards Expired	$0	$0	$0
Weighted Average Fair Value per Restricted Share, Ending Balance	$55.79	$46.81	$34.17
LTIP Unit, Beginning Balance	285,034	367,620	247,508
LTIP Units, Awards Granted	281,931	70,235	223,452
LTIP Unit, Awards exercised/vested	-93,335	-152,821	-101,988
LTIP Unit, Awards forfeited	-2,374	0	-1,352
LTIP unit, Awards Expired	0	0	0
LTIP Unit, Ending Balance	471,256	285,034	367,620
Weighted Average Fair Value per LTIP Unit, Beginning Balance	$48.41	$34.80	$25.62
Weighted Average Fair Value per LTIP Unit, Awards granted	$52.73	$57.24	$46.64
Weighted Average Fair Value per LTIP Unit, Awards exercised/vested	$32.97	$21.11	$38.57
Weighted Average Fair Value per LTIP Unit, Awards forfeited	$56.72	$0	$27.79
Weighted Average Fair Value per LTIP Unit, Awards Expired	$0	$0	$0
Weighted Average Fair Value per LTIP Unit, Ending Balance	$55.67	$48.41	$34.80
Weighted average grant date fair value for Options	$7.90	$8.54	$8.36
Intrinsic value of options exercised	$16.70	$46.70	$74.80
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	13.9	18	14
Stock Option [Member]	'	'	'
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]	'	'	'
Weighted average grant date fair value for Options	$7.97	$8.55	$8.18
Long Term Incentive Plan Units [Member]	'	'	'
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	$5.10	$9.10	$5.50

Share_Incentive_Plans_Details_1

Share Incentive Plans (Details 2) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	8,470,532
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'5 years 7 months 5 days
Options Outstanding, Weighted Average Exercise Price	$43.67
Options Exercisable, Options	6,046,489
Options Exercisable, Weighted Average Exercise Price	$38.76
Options, Vested and expected to vest	8,293,422
Options, Weighted Average Remaining Contractual Life in Years	'5 years 6 months 20 days
Options, Weighted Average Exercise Price	$43.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	$85.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$85.50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	'4 years 6 months 15 days
Exercise Price Range One [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	1,235,980
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'5 years 0 months 30 days
Options Outstanding, Weighted Average Exercise Price	$23.07
Options Exercisable, Options	1,235,980
Options Exercisable, Weighted Average Exercise Price	$23.07
Exercise Price Range Two [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	386,723
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'0 years 28 days
Options Outstanding, Weighted Average Exercise Price	$29.25
Options Exercisable, Options	386,723
Options Exercisable, Weighted Average Exercise Price	$29.25
Exercise Price Range Three [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	1,332,280
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'4 years 6 months 28 days
Options Outstanding, Weighted Average Exercise Price	$32.61
Options Exercisable, Options	1,332,280
Options Exercisable, Weighted Average Exercise Price	$32.61
Exercise Price Range Four [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	1,347,487
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$40.46
Options Exercisable, Options	1,347,487
Options Exercisable, Weighted Average Exercise Price	$40.46
Exercise Price Range Five [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	61,187
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'6 years 6 months 18 days
Options Outstanding, Weighted Average Exercise Price	$48.41
Options Exercisable, Options	23,059
Options Exercisable, Weighted Average Exercise Price	$48.06
Exercise Price Range Six [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	2,774,770
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'6 years 11 months 25 days
Options Outstanding, Weighted Average Exercise Price	$53.91
Options Exercisable, Options	1,226,038
Options Exercisable, Weighted Average Exercise Price	$53.64
Exercise Price Range Seven [Member]	'
Information regarding options outstanding and exercisable	'
Options Outstanding, Options	1,332,105
Options Outstanding, Weighted Average Remaining Contractual Life in Years	'8 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$59.76
Options Exercisable, Options	494,922
Options Exercisable, Weighted Average Exercise Price	$59.98

Share_Incentive_Plans_Details_2

Share Incentive Plans (Details Textuals) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$18.70	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$62.32	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	8,470,532	'	'
Share Incentive Plans (Textuals) [Abstract]	'	'	'
Maximum aggregate number of awards under Share Incentive Plan	12,980,741	12,980,741	'
Shares available for future issuance	9,562,775	'	'
Total compensation expense not yet vested	$16.50	'	'
Weighted average term for recognition of compensation expense not yet recognized (years)	'1 year 5 months 12 days	'	'
Market value of shares	$51.87	'	'
Options Exercisable	'	5,385,907	5,415,550
Weighted Average Exercise Price of Options Exercisable	'	$35.40	$34.64
Exercise Price Range One [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$18.70	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$24.93	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	1,235,980	'	'
Exercise Price Range Two [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$24.94	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$31.16	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	386,723	'	'
Exercise Price Range Three [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$31.17	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$37.39	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	1,332,280	'	'
Exercise Price Range Four [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$37.40	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$43.62	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	1,347,487	'	'
Exercise Price Range Five [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$43.63	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$49.86	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	61,187	'	'
Exercise Price Range Six [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$49.87	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$56.09	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	2,774,770	'	'
Exercise Price Range Seven [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$56.10	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$62.32	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	1,332,105	'	'

Employee_Plans_Details

Employee Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of information regarding the Common Shares issued under the ESPP	'	'	'
Shares issued	73,468	110,054	113,107
Employee Share Purchase Plan Issuance Price Minimum	$44.26	$46.33	$44.04
Employee Share Purchase Plan Issuance Price Maximum	$48.17	$51.78	$51.19
Issuance proceeds	$3,401,000	$5,399,000	$5,262,000
Value of common shares that can be acquired by the employee and trustees under employees share purchase plan	100,000	'	'
Number of common shares authorized after amendment	7,000,000	'	'
Number of common shares authorized before amendment	2,000,000	'	'
Common Shares available for purchase under the ESPP	3,107,341	'	'
Purchase price of common stock	85.00%	'	'
Minimum eligible compensation percentage for the defined contribution plan (the "401(k) Plan")	3.00%	'	'
Defined contribution plan vesting period	5	'	'
Defined contribution plan, compensation expense	$4,200,000	$4,400,000	$3,700,000

Distribution_Reinvestment_and_1

Distribution Reinvestment and Share Purchase Plan (Details)	12 Months Ended
	Dec. 31, 2013
Common Shares registered with Distribution Reinvestment and Share Purchase Plan (the "DRIP Plan")	4,850,000
Number of shares available for issuance	4,814,608
Discount range at which common shares can be purchased on a monthly basis with optional cash	0.00%
ShareBasedCompensationArrangementByShareBasedPaymentMaximumDiscountFromMarketPrice	5.00%
Original DRIP Plan [Member]	'
Common Shares registered with Distribution Reinvestment and Share Purchase Plan (the "DRIP Plan")	5,000,000

Transactions_With_Related_Part1

Transactions With Related Parties (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]	'	'	'
Indirect Ownership Interest Percentage	1.00%	'	'
Amount Incurred For leased office space	$1.70	$1.30	$2.20

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
300 properties designed and built in violation of accessibility requirements	300	'	'
Projects in various stages of development	14	'	'
Units in various stages of development	4,017	'	'
Consolidated Project Under Development Commitment Fund	$768,100,000	'	'
Various stages of development with estimated completion dates ranging through June 30, 2016	30-Jun-16	'	'
Number Of Unconsolidated Projects	3	'	'
Number Of Apartments Units Under Development Unconsolidated Projects	176	'	'
Estimated completion period of project	31-Dec-14	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	108,000,000	1,047,545,000	'
Investment in Joint Venture	292,600,000	'	'
Noncontrolling Interests - Partially Owned Properties	126,583,000	77,688,000	'
Number Of Operating Properties Under Long Term Ground Leases	13	'	'
Total operating lease payments	13,200,000	8,100,000	7,100,000
Compensation expense, Recognized	500,000	1,000,000	1,000,000
Number Of Operating Properties and Land Parcels Under Long Term Ground Leases	14	'	'
Operating Leases:	'	'	'
Minimum Rent Payments Due, Year 1	14,518,000	'	'
Minimum Rent Payments Due, Year 2	14,935,000	'	'
Minimum Rent Payments Due, Year 3	15,084,000	'	'
Minimum Rent Payments Due, Year 4	14,961,000	'	'
Minimum Rent Payments Due, Year 5	14,830,000	'	'
Minimum Rent Payments Due, Thereafter	869,687,000	'	'
Minimum Rent Payments Due, Total	944,015,000	'	'
Other Long-Term Liabilities:	'	'	'
Deferred Compensation Due, Year 1	1,378,000	'	'
Deferred Compensation Due, Year 2	1,705,000	'	'
Deferred Compensation Due, Year 3	1,705,000	'	'
Deferred Compensation Due, Year 4	1,705,000	'	'
Deferred Compensation Due, Year 5	1,705,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	5,596,000	'	'
Deferred Compensation Due, Total	13,794,000	'	'
Company's Portion [Member]	'	'	'
Land purchase price	76,100,000	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	102,500,000	'	'
Joint Venture Partner [Member]	'	'	'
Land purchase price	57,900,000	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	75,700,000	'	'
Noncontrolling Interests - Partially Owned Properties	111,700,000	'	'
Unconsolidated Development Projects Held for and or Under Development [Domain]	'	'	'
Number Of Unconsolidated Projects	1	'	'
Enclave at Wellington [Domain]	'	'	'
Business Acquisition, Percentage of Voting Interests Acquired	95.00%	'	'
Parkside at Emeryville [Domain]	'	'	'
Unconsolidated Project Under Development Commitment Fund	$19,700,000	'	'

Reportable_Segments_Details

Reportable Segments (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Rental income:	'	'	'
Same store	$1,769,280	$1,693,239	$1,771,449
Segment Reporting Segment Non Same Store Rental Income	608,724	44,690	-255,255
Segment Reporting Information Revenues	2,378,004	1,737,929	1,516,194
Operating expenses:	'	'	'
Same store	607,243	587,037	638,671
Non-same store/other	220,559	33,778	-74,018
Segment Reporting Segment Operating Expenses	827,802	620,815	564,653
NOI:	'	'	'
Same store	1,162,037	1,106,202	1,132,778
Non-same store/other	388,165	10,912	-181,237
Total NOI	1,550,202	1,117,114	951,541
Assets	22,834,545	17,201,000	'
Payments to Acquire Other Property, Plant, and Equipment	135,816	152,828	'
Reportable Segments (Textuals) [Abstract]	'	'	'
Units in same store properties	80,247	98,577	'
Rental income	2,378,004	1,737,929	1,516,194
Property and maintenance expense	-449,461	-332,190	-304,380
Real estate taxes and insurance expense	-293,999	-206,723	-178,406
Property management expense	-84,342	-81,902	-81,867
Total operating expenses	-827,802	-620,815	-564,653
Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	11,945,273	12,341,635	'
Payments to Acquire Other Property, Plant, and Equipment	94,492	122,024	'
Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	10,889,272	4,859,365	'
Payments to Acquire Other Property, Plant, and Equipment	41,324	30,804	'
Boston [Domain]	'	'	'
Rental income:	'	'	'
Same store	175,031	168,063	142,514
Segment Reporting Segment Non Same Store Rental Income	61,139	0	8,115
Operating expenses:	'	'	'
Same store	57,261	54,888	49,317
Non-same store/other	18,238	0	2,361
NOI:	'	'	'
Same store	117,770	113,175	93,197
Non-same store/other	42,901	0	5,754
Boston [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	1,087,370	1,133,098	'
Payments to Acquire Other Property, Plant, and Equipment	15,630	22,592	'
Boston [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	946,747	0	'
Payments to Acquire Other Property, Plant, and Equipment	2,097	0	'
Denver [Domain]	'	'	'
Rental income:	'	'	'
Same store	100,425	93,571	99,681
Segment Reporting Segment Non Same Store Rental Income	2,805	1,325	0
Operating expenses:	'	'	'
Same store	30,028	28,204	32,564
Non-same store/other	744	429	1
NOI:	'	'	'
Same store	70,397	65,367	67,117
Non-same store/other	2,061	896	-1
Denver [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	520,999	542,243	'
Payments to Acquire Other Property, Plant, and Equipment	5,330	4,593	'
Denver [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	20,481	20,974	'
Payments to Acquire Other Property, Plant, and Equipment	54	5	'
New York Domain]	'	'	'
Rental income:	'	'	'
Same store	286,345	274,683	254,441
Segment Reporting Segment Non Same Store Rental Income	136,182	14,611	6,794
Operating expenses:	'	'	'
Same store	114,587	109,667	104,492
Non-same store/other	43,055	5,988	366
NOI:	'	'	'
Same store	171,758	165,016	149,949
Non-same store/other	93,127	8,623	6,428
New York Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	2,678,546	2,742,346	'
Payments to Acquire Other Property, Plant, and Equipment	8,982	12,437	'
New York Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	2,092,454	406,013	'
Payments to Acquire Other Property, Plant, and Equipment	3,024	142	'
San Francisco [Domain]	'	'	'
Rental income:	'	'	'
Same store	173,011	159,535	126,951
Segment Reporting Segment Non Same Store Rental Income	119,749	7,268	3,889
Operating expenses:	'	'	'
Same store	59,104	57,373	43,627
Non-same store/other	42,851	3,022	1,796
NOI:	'	'	'
Same store	113,907	102,162	83,324
Non-same store/other	76,898	4,246	2,093
San Francisco [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	968,840	999,267	'
Payments to Acquire Other Property, Plant, and Equipment	11,767	18,010	'
San Francisco [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	1,824,550	178,339	'
Payments to Acquire Other Property, Plant, and Equipment	9,989	1,176	'
Seattle [Domain]	'	'	'
Rental income:	'	'	'
Same store	129,283	122,267	122,494
Segment Reporting Segment Non Same Store Rental Income	19,462	4,747	6,012
Operating expenses:	'	'	'
Same store	43,718	41,041	45,275
Non-same store/other	6,284	1,510	2,149
NOI:	'	'	'
Same store	85,565	81,226	77,219
Non-same store/other	13,178	3,237	3,863
Seattle [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	835,584	865,068	'
Payments to Acquire Other Property, Plant, and Equipment	6,398	6,892	'
Seattle [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	312,240	90,205	'
Payments to Acquire Other Property, Plant, and Equipment	1,598	67	'
South Florida [Domain]	'	'	'
Rental income:	'	'	'
Same store	185,361	177,675	174,417
Segment Reporting Segment Non Same Store Rental Income	2,653	0	14,488
Operating expenses:	'	'	'
Same store	69,891	67,811	66,838
Non-same store/other	1,031	0	5,165
NOI:	'	'	'
Same store	115,470	109,864	107,579
Non-same store/other	1,622	0	9,323
South Florida [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	1,157,283	1,193,506	'
Payments to Acquire Other Property, Plant, and Equipment	14,550	17,338	'
South Florida [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	50,414	0	'
Payments to Acquire Other Property, Plant, and Equipment	300	0	'
Southern California [Domain]	'	'	'
Rental income:	'	'	'
Same store	333,917	320,749	299,508
Segment Reporting Segment Non Same Store Rental Income	74,123	3,040	30,539
Operating expenses:	'	'	'
Same store	107,346	103,925	98,907
Non-same store/other	31,599	1,179	12,144
NOI:	'	'	'
Same store	226,571	216,824	200,601
Non-same store/other	42,524	1,861	18,395
Southern California [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	2,177,336	2,250,301	'
Payments to Acquire Other Property, Plant, and Equipment	16,580	17,747	'
Southern California [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	1,078,038	70,389	'
Payments to Acquire Other Property, Plant, and Equipment	3,975	141	'
Washington DC [Domain]	'	'	'
Rental income:	'	'	'
Same store	253,056	247,880	240,755
Segment Reporting Segment Non Same Store Rental Income	179,077	13,124	36,657
Operating expenses:	'	'	'
Same store	76,033	75,580	75,492
Non-same store/other	58,759	3,984	11,373
NOI:	'	'	'
Same store	177,023	172,300	165,263
Non-same store/other	120,318	9,140	25,284
Washington DC [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	1,873,897	1,941,446	'
Payments to Acquire Other Property, Plant, and Equipment	10,069	15,426	'
Washington DC [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	2,664,702	276,901	'
Payments to Acquire Other Property, Plant, and Equipment	14,877	1,062	'
Non-Core [Domain]	'	'	'
Rental income:	'	'	'
Same store	132,851	128,816	310,688
Operating expenses:	'	'	'
Same store	49,275	48,548	122,159
NOI:	'	'	'
Same store	83,576	80,268	188,529
Non-Core [Domain] | Same Store [Domain]	'	'	'
NOI:	'	'	'
Assets	645,418	674,360	'
Payments to Acquire Other Property, Plant, and Equipment	5,186	6,989	'
Other [Domain]	'	'	'
Rental income:	'	'	'
Segment Reporting Segment Non Same Store Rental Income	13,534	575	-3,477
Operating expenses:	'	'	'
Non-same store/other	17,998	17,666	7,326
NOI:	'	'	'
Non-same store/other	-4,464	-17,091	-10,803
Payments to Acquire Other Property, Plant, and Equipment	5,410	28,211	'
Other [Domain] | Non-same store [Domain]	'	'	'
NOI:	'	'	'
Assets	1,899,646	3,816,544	'
Properties sold in 2013 [Domain]	'	'	'
Rental income:	'	'	'
Segment Reporting Segment Non Same Store Rental Income	0	0	-358,272
Operating expenses:	'	'	'
Non-same store/other	0	0	-116,699
NOI:	'	'	'
Non-same store/other	$0	$0	($241,573)

Subsequent_EventsOther_Details

Subsequent Events/Other (Details) (USD $)	2 Months Ended	3 Months Ended		12 Months Ended			36 Months Ended	48 Months Ended
	Feb. 21, 2014	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013
Subsequent Events/Other (Textuals) [Abstract]	'	'	'	'	'	'	'	'
Properties Contracted To Be Acquired	1	'	'	'	'	'	'	'
Units Contracted To Be Acquired	430	'	'	'	'	'	'	'
Purchase Price For Commitments To Acquire	$143,000,000	'	'	'	'	'	'	'
Business Combination, Acquisition Related Costs	'	'	'	300,000	7,000,000	7,700,000	'	94,700,000
Noncash Project Abandonment Costs	'	'	'	5,184,000	9,056,000	5,075,000	'	'
Other Expenses	'	'	'	5,500,000	16,000,000	12,800,000	'	'
Litigation Settlement, Expense	'	'	'	'	4,200,000	'	'	'
BreakUpFee	'	80,000,000	70,000,000	'	150,000,000	'	'	'
Gain on Sale of Securities, Net	'	'	'	-2,122,000	0	0	'	'
Proceeds From Royalty Termination	'	'	'	'	'	4,500,000	'	'
Insurance Litigation Settlement proceeds	'	'	'	'	'	800,000	'	'
Disposal Group Corporate Housing Business Sale	'	'	'	'	'	4,000,000	'	'
Seller Provided Financing	'	'	'	'	'	2,000,000	'	'
Proceeds Received From Seller Provided Finanacing	'	'	'	1,500,000	300,000	200,000	'	'
Discontinued Operation Corporate Housing Business Gain Loss On Disposal Of Discontinued Operation Net Of Tax	'	'	'	'	'	'	2,900,000	'
Available-for-sale Securities [Member]	'	'	'	'	'	'	'	'
Subsequent Events/Other (Textuals) [Abstract]	'	'	'	'	'	'	'	'
Gain on Sale of Securities, Net	'	'	'	$2,100,000	'	'	'	'

Quarterly_Financial_Data_Unaud2

Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unaudited Quarterly Financial Data [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	'	$626,629	$617,217	$504,722	$452,483	$449,072	$431,910	$414,037	'	'	'
Total revenues subsequently reclassified to discontinued operations	'	-2,817	-17,861	-34,440	-33,385	-2,627	-16,441	-32,411	'	'	'
Operating income	'	120,396	63,977	104,246	148,247	142,020	121,745	102,110	512,288	514,122	406,509
Operating income subsequently reclassified to discontinued operations	'	-998	-7,056	-13,283	-13,862	-912	-6,815	-12,366	'	'	'
(Loss) income from continuing operations	'	-13,465	-58,511	-165,339	100,763	91,269	-6,340	-25,394	-168,174	160,298	-72,941
Income from continuing operations subsequently reclassified to discontinued operations	'	-998	-7,056	-11,987	-13,476	-912	-6,814	-11,968	'	'	'
Discontinued operations, net	'	405,182	395,243	1,226,373	283,636	145,054	114,655	177,561	2,073,527	720,906	1,008,138
Discontinued operations, net from properties sold subsequent to the respective reporting period	'	998	7,056	11,987	13,476	912	6,814	11,968	'	'	'
Net income	'	'	'	'	'	'	'	'	1,905,353	881,204	935,197
Net income available to Common Shares	109,940	376,155	323,723	1,016,650	365,979	218,603	99,797	141,833	1,826,468	826,212	879,720
Net Income per share - basis	$0.31	$1.05	$0.90	$3.01	$1.18	$0.73	$0.33	$0.47	$5.16	$2.73	$2.98
Weighted Average Number of Shares Outstanding, Basic	359,919	359,811	359,653	337,532	310,398	301,336	300,193	298,805	354,305	302,701	294,856
Net income per share - diluted	$0.30	$1.05	$0.90	$3.01	$1.17	$0.72	$0.33	$0.47	$5.16	$2.71	$2.98
Weighted average Common Shares outstanding	375,860	359,811	359,653	337,532	327,108	318,773	300,193	298,805	354,305	319,766	294,856
Operating Partnership [Member]	'	'	'	'	'	'	'	'	'	'	'
Unaudited Quarterly Financial Data [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	639,134	626,629	617,217	504,722	452,483	449,072	431,910	414,037	'	'	'
Total revenues subsequently reclassified to discontinued operations	'	-2,817	-17,861	-34,440	-33,385	-2,627	-16,441	-32,411	'	'	'
Operating income	223,669	120,396	63,977	104,246	148,247	142,020	121,745	102,110	'	'	'
Operating income subsequently reclassified to discontinued operations	'	-998	-7,056	-13,283	-13,862	-912	-6,815	-12,366	'	'	'
(Loss) income from continuing operations	69,141	-13,465	-58,511	-165,339	100,763	91,269	-6,340	-25,394	'	'	'
Income from continuing operations subsequently reclassified to discontinued operations	'	-998	-7,056	-11,987	-13,476	-912	-6,814	-11,968	'	'	'
Discontinued operations, net	46,729	405,182	395,243	1,226,373	283,636	145,054	114,655	177,561	'	'	'
Discontinued operations, net from properties sold subsequent to the respective reporting period	'	998	7,056	11,987	13,476	912	6,814	11,968	'	'	'
Net income	115,870	391,717	336,732	1,061,034	384,399	236,323	108,315	152,167	'	'	'
Net income available to Units	114,271	390,991	336,511	1,059,973	382,974	229,099	104,529	148,251	'	'	'
Net Income per share - basis	$0.31	$1.05	$0.90	$3.01	$1.18	$0.73	$0.33	$0.47	'	'	'
Net income per share - diluted	$0.30	$1.05	$0.90	$3.01	$1.17	$0.72	$0.33	$0.47	'	'	'
Weighted average Units outstanding	373,643	373,547	373,403	351,255	324,364	315,513	314,255	312,011	'	'	'
Weighted average Units outstanding	375,860	373,547	373,403	351,255	327,108	318,773	314,255	312,011	'	'	'
Scenario, Previously Reported [Member]	'	'	'	'	'	'	'	'	'	'	'
Unaudited Quarterly Financial Data [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	'	629,446	635,078	539,162	485,868	451,699	448,351	446,448	'	'	'
Operating income	'	121,394	71,033	117,529	162,109	142,932	128,560	114,476	'	'	'
(Loss) income from continuing operations	'	-12,467	-51,455	-153,352	114,239	92,181	474	-13,426	'	'	'
Discontinued operations, net	'	404,184	388,187	1,214,386	270,160	144,142	107,841	165,593	'	'	'
Scenario, Previously Reported [Member] | Operating Partnership [Member]	'	'	'	'	'	'	'	'	'	'	'
Unaudited Quarterly Financial Data [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	'	629,446	635,078	539,162	485,868	451,699	448,351	446,448	'	'	'
Operating income	'	121,394	71,033	117,529	162,109	142,932	128,560	114,476	'	'	'
(Loss) income from continuing operations	'	-12,467	-51,455	-153,352	114,239	92,181	474	-13,426	'	'	'
Discontinued operations, net	'	$404,184	$388,187	$1,214,386	$270,160	$144,142	$107,841	$165,593	'	'	'

Real_Estate_and_Accumulated_De1

Real Estate and Accumulated Depreciation - Overall Summary and Encumbrances Reconciliation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]	'	'	'
Number Of Unconsolidated Projects	3	'	'
Land And Depreciable Property Net	$15,200,000,000	$11,200,000,000	'
Overall summary of real estate and accumulated depreciation	'	'	'
Accumulated Depreciation	-4,807,709,000	-4,912,221,000	-4,539,583,000
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]	'	'	'
Number of Properties Encumbered	38	'	'
Changes in total real estate	'	'	'
Balance, beginning of year	21,008,429,000	20,407,946,000	19,702,371,000
Acquisitions and development	9,273,492,000	1,250,633,000	1,721,895,000
Improvements	139,950,000	161,460,000	151,476,000
Dispositions and other	-3,620,923,000	-811,610,000	-1,167,796,000
Balance, end of year	26,800,948,000	21,008,429,000	20,407,946,000
Changes in accumulated depreciation	'	'	'
Balance, beginning of year	-4,912,221,000	-4,539,583,000	-4,337,357,000
Depreciation	1,013,353,000	684,992,000	663,616,000
Dispositions and other	-1,117,865,000	-312,354,000	-461,390,000
Balance, end of year	-4,807,709,000	-4,912,221,000	-4,539,583,000
Partially Owned Unconsolidated Units	1,669	'	'
EQR-Fanwell 2007 LP [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Encumbrances	300,000,000	'	'
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]	'	'	'
Number of Properties Encumbered	6	'	'
EQR-Wellfan 2008 LP [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Encumbrances	550,000,000	'	'
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]	'	'	'
Number of Properties Encumbered	14	'	'
Fannie Mae Pool 3 [Domain]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Encumbrances	485,958,561	'	'
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]	'	'	'
Number of Properties Encumbered	5	'	'
Archstone Master Property [Domain]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Encumbrances	800,000,000	'	'
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]	'	'	'
Number of Properties Encumbered	13	'	'
Individual Property Encumbrances [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Encumbrances	3,038,206,859	'	'
EQR-Wholly Owned Unencumbered [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	253	'	'
Units	67,220	'	'
Investment in Real Estate, Gross	17,386,901,834	'	'
Accumulated Depreciation	-3,177,396,618	'	'
Investment in Real Estate Net	14,209,505,216	'	'
Encumbrances	0	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-3,177,396,618	'	'
EQR-Wholly Owned Encumbered [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	112	'	'
Units	32,101	'	'
Investment in Real Estate, Gross	8,397,867,526	'	'
Accumulated Depreciation	-1,457,510,357	'	'
Investment in Real Estate Net	6,940,357,169	'	'
Encumbrances	2,703,534,549	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-1,457,510,357	'	'
Portfolio Entity Encumbrances [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	0	'	'
Units	0	'	'
Investment in Real Estate, Gross	0	'	'
Accumulated Depreciation	0	'	'
Investment in Real Estate Net	0	'	'
Encumbrances	2,135,958,561	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	0	'	'
Wholly Owned Properties [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	365	'	'
Units	99,321	'	'
Investment in Real Estate, Gross	25,784,769,360	'	'
Accumulated Depreciation	-4,634,906,975	'	'
Investment in Real Estate Net	21,149,862,385	'	'
Encumbrances	4,839,493,110	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-4,634,906,975	'	'
EQR-Partially Owned Unencumbered [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	8	'	'
Units	1,505	'	'
Investment in Real Estate, Gross	573,312,560	'	'
Accumulated Depreciation	-69,955,775	'	'
Investment in Real Estate Net	503,356,785	'	'
Encumbrances	0	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-69,955,775	'	'
EQR-Partially Owned Encumbered [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	11	'	'
Units	2,247	'	'
Investment in Real Estate, Gross	442,866,480	'	'
Accumulated Depreciation	-102,846,572	'	'
Investment in Real Estate Net	340,019,908	'	'
Encumbrances	334,672,310	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-102,846,572	'	'
Partially Owned Properties [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	19	'	'
Units	3,752	'	'
Investment in Real Estate, Gross	1,016,179,040	'	'
Accumulated Depreciation	-172,802,347	'	'
Investment in Real Estate Net	843,376,693	'	'
Encumbrances	334,672,310	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-172,802,347	'	'
Unencumbered Properties [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	261	'	'
Units	68,725	'	'
Investment in Real Estate, Gross	17,960,214,394	'	'
Accumulated Depreciation	-3,247,352,393	'	'
Investment in Real Estate Net	14,712,862,001	'	'
Encumbrances	0	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-3,247,352,393	'	'
Encumbered Properties [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	123	'	'
Units	34,348	'	'
Investment in Real Estate, Gross	8,840,734,006	'	'
Accumulated Depreciation	-1,560,356,929	'	'
Investment in Real Estate Net	7,280,377,077	'	'
Encumbrances	5,174,165,420	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	-1,560,356,929	'	'
Total Consolidated Investment in Real Estate [Member]	'	'	'
Overall summary of real estate and accumulated depreciation	'	'	'
Properties	384	'	'
Units	103,073	'	'
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land	6,887,475,376	'	'
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,679,961,107	'	'
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,233,511,917	'	'
SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Land	6,887,475,376	'	'
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,913,473,024	'	'
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,800,948,400	'	'
Investment in Real Estate, Gross	26,800,948,400	'	'
Accumulated Depreciation	-4,807,709,322	'	'
Investment in Real Estate Net	21,993,239,078	'	'
Encumbrances	5,174,165,420	'	'
Changes in accumulated depreciation	'	'	'
Balance, end of year	($4,807,709,322)	'	'

Real_Estate_and_Accumulated_De2

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100 K Street [Member]

1111 Belle Pre (fka The Madison) [Member]

Mass 1210 [Member]

1500 Mass Ave [Member]

170 Amsterdam [Member]

175 Kent [Member]

200 N Lemon Street [Member]

A204-206 Pine Street/1610 2nd Avenue [Member]

2201 Pershing Drive [Member]

2201 Wilson [Member]

M St 2400 [Member]

Four Hundred And Twenty East 80th Street [Member]

425 Mass [Member]

Washington 600 [Member]

Greene 70 [Member]

Broadway 71 [Member]

77 Bluxome [Domain]

777 Sixth [Member]

801 Brannan [Member]

88 Hillside [Member]

Abington Glen [Member]

Agoura Hills [Member]

Alban Towers [Member]

Arbor Terrace [Member]

Arboretum (MA) [Member]

Arden Villas [Member]

Artisan on Second [Member]

Ashton, The [Member]

Auvers Village [Member]

Avenue Two [Member]

Azure (fka Mission Bay-Block 13) [Member]

Ball Park Lofts [Member]

Barrington Place [Member]

Bay Hill [Member]

Beatrice, The [Domain]

Belle Terra I [Member]

Belle Arts Condominium Homes, LLC [Member]

Bella Fontaine [Member]

Bellevue [Member]

Berkeley Land [Member]

Boston Common [Member]

Bradford Apartments [Member]

Briar Knoll Apts [Member]

Briarwood CA [Member]

Bridford Lakes Two [Member]

Brooklyn Heights [Member]

The Brooklyner (fka 111 Lawrence) [Member]

Brookside (CO) [Member]

Cambridge Park [Member]

Carlyle Mill [Member]

Cascade [Domain]

Cascade Two [Domain]

Centennial (fka Centennial Court & Centennial Tower) [Member]

Centre Club [Member]

Centre Club II [Member]

Cierra Crest [Member]

Cleo, The [Member]

Coconut Palm Club [Member]

Courthouse Plaza [Member]

Cove at Boynton Beach I [Member]

Cove at Boynton Beach II [Member]

Creekside (San Mateo) [Member]

Cronins Landing [Member]

Crowntree Lakes [Member]

Crystal Place [Member]

Cupertino [Member]

Cypress Lake at Waterford [Member]

Dartmouth Woods [Member]

Dean Estates [Member]

Deerwood (Corona) [Member]

Del Mar Heights [Member]

DuPont Circle [Member]

Eagle Canyon [Member]

Edgemont at Bethesda Metro [Member]

Emerald Park [Member]

Emerson Place [Member]

Emeryville [Member]

Encinitas [Member]

Enclave at Waterways [Member]

Enclave at Winston Park [Member]

The Encore at Sherman Oaks [Member]

Estates at Wellington Green [Member]

Eye Street [Member]

Fox Hill Apartments [Member]

Fremont Center [Member]

Gables Grand Plaza [Member]

Gallery, The [Member]

Gatehouse at Pine Lake [Member]

Gatehouse on the Green [Member]

Gates of Redmond [Member]

Geary Court Yard [Member]

Glen Meadow [Member]

Glendale [Member]

Governors Green [Member]

Greenfield Village [Member]

Greenwood Park [Member]

Greenwood Plaza [Member]

Hacienda [Member]

Hamilton Villas [Member]

Hammocks Place [Member]

Hampshire Place [Member]

Harbor Steps [Member]

Heritage Ridge [Member]

Heron Pointe [Member]

High Meadow [Member]

Highland Glen [Member]

Highland Glen Two [Member]

Highlands at Cherry Hill [Member]

Highlands At South Plainfield [Member]

Hikari [Member]

Hudson Crossing [Member]

Hudson Pointe [Member]

Hunt Club Two [Member]

Huntington Park [Member]

Jia [Member]

Kendall Square [Member]

Kenwood Mews [Member]

Kings Colony (FL) [Member]

Lake Buena Vista Combined [Member]

Landings at Pembroke Lakes [Member]

Landings at Port Imperial [Member]

Legacy at Highlands Ranch [Member]

Lincoln Heights [Member]

Loft 590 [Member]

Longacre House [Member]

Longfellow Place [Member]

Mantena [Domain]

Marina Del Rey [Member]

Marquessa [Member]

Martine, The [Member]

Milano Lofts [Domain]

Millikan [Member]

Mission Verde, LLC [Member]

Mosaic at Largo Station [Member]

Mountain View [Member]

Mozaic at Union Station [Member]

Murray Hill [Member]

Northglen [Member]

Northlake (MD) [Member]

Northridge [Member]

Oak Mill One [Member]

Oak Park North [Member]

Oak Park South [Member]

Oaks at Falls Church [Member]

Oakwood Boston [Member]

Oakwood Crystal City [Member]

Oakwood Marina Del Rey [Member]

Oasis at Delray Beach I [Member]

Oasis at Delray Beach II [Member]

Ocean Crest [Member]

Ocean Walk [Member]

Olde Redmond Place [Member]

One Henry Adams [Member]

Orchard Ridge [Member]

Palm Trace Landings [Member]

Parc 77 [Member]

Parc Cameron [Member]

Parc Coliseum [Member]

Parc East Towers [Member]

Park at Turtle Run The [Member]

Park Connecticut [Member]

Park West C A [Member]

Parkfield [Member]

Parkside [Member]

Pegasus [Member]

Pentagon City [Member]

Phillips Park [Member]

Playa Del Rey [Member]

Playa Pacifica [Member]

Portofino [Member]

Portofino Val [Member]

Portside Towers [Member]

Potrero [Member]

Preserve at Deer Creek [Member]

Prime, The [Member]

Promenade at Aventura [Member]

Promenade at Town Center I [Member]

Promenade at Tower Center II [Member]

Promenade at Wyndham Lakes [Member]

Promenade Terrace [Member]

Quarry Hills [Member]

Red 160 [Member]

Red Road Commons [Member]

Redmond Court [Member]

Regency Palms [Member]

Renaissance Villas [Member]

Reserve at Ashley Lake [Member]

Reserve At Town Center II WA Member

Reserve at Town Center III [Member]

Residences at Bayview [Member]

Residences at Westgate II (fka Westage II) [Member]

Residences at Westgate III (fka Westgage III) [Member]

Reunion at Redmond Ridge [Member]

Rianna I [Member]

Ridgewood Village I And I I [Member]

Rincon Hill [Member]

Riva Terra I [Member]

Riva Terra II [Member]

River Tower [Member]

Riverpark [Member]

Rivers Bend C T [Member]

Riverview Condominiums [Member]

Rolling Green (Amherst) [Member]

Rolling Green (Milford) [Member]

Rosecliff II [Member]

Rosslyn [Member]

Sabal Palm at Lake Buena Vista [Member]

Sabal Pointe [Member]

Sage Condominium Homes, LLC [Member]

Sakura Crossing [Member]

Sausalito [Member]

Savoy at Dayton Station I & II [Member]

Savoy at Dayton Station III (fka Savoy III) [Member]

Scarborough Square [Member]

Seventh & James [Member]

Shadow Creek [Member]

Sheffield Court [Member]

Sheridan Lake Club [Member]

Sheridan Ocean Club Combined [Member]

Skycrest [Member]

Skylark [Member]

Skyline Terrace [Member]

Skyline Towers [Member]

Sonterra at Foothill Ranch [Domain]

South San Francisco [Member]

Southwood [Member]

Springbrook Estates [Member]

St. Andrews at Winston Park [Member]

Summerset Village [Member]

Summit And Birch Hill [Member]

Summit at Lake Union [Member]

Tallman [Member]

Tasman (fka Vista Montana - Residential) [Member]

Ten23 (fka 500 West 23rd Street) [Member]

Terraces, The [Member]

Third Square [Member]

Tortuga Bay [Member]

Town Center South Commercial [Member]

town square at mark center phase II [Member]

Trump Place 140 Riverside [Member]

Trump Place 160 Riverside [Member]

Trump place 180 Riverside [Member]

Urbana (fka Market Street Landing) [Member]

Uwajimaya Village [Member]

Vantage Pointe [Member]

Veloce [Member]

Veridian (fka Silver Spring) [Member]

Villa Solana [Member]

Village at Bear Creek [Member]

Village at Howard Hughes (Lots 1&2, 3&4) [Member]

Virginia Square [Member]

Vista Del Lago [Member]

Walden Park [Member]

Waterford Place C O [Member]

Watertown Square [Member]

Webster Green [Member]

Welleby Lake Club [Member]

West 95th [Member]

West End Apartments [Member]

West Seattle [Member]

Westchester at Pavilions [Member]

Westchester at Rockville [Member]

Westmont [Member]

Westside [Member]

Westside Villas I [Member]

Westside Villas II [Member]

Westside Villas III [Member]

Westside Villas IV [Member]

Westside Villas V [Member]

Westside Villas VI [Member]

Westside Villas VII [Member]

Westwood Glen [Member]

Windridge CA [Member]

Winston F L [Member]

Wood Creek CA [Member]

Woodbridge C T [Member]

Woodlake WA [Member]

Woodland Park [Member]

Management [Member]

Operating Partnership [Member]

Wholly Owned Unencumbered [Member]

101 West End [Member]

Joyce On Pentagon Row 1401 [Member]

2501 Porter [Member]

4701 Willard Ave [Member]

55 West Fifth I & II [Member]

House 929 [Member]

Academy Village [Member]

Acappella [Member]

Acton Courtyard [Member]

Alborada [Member]

The Arches [Member]

Artech Building [Member]

Artisan Square [Member]

Avanti [Member]

Avenir [Member]

Bachenheimer Building [Member]

Bella Vista Apartments at Boca Del Mar [Member]

Berkeleyan [Member]

Breakwater at Marina Del Rey [Member]

Broadway [Member]

Calvert Woodley [Member]

Camargue [Member]

Canterbury [Member]

Carmel Terrace [Member]

Chelsea [Member]

Chelsea Square [Member]

Church Corner [Member]

Citrus Suites [Member]

city pointe [Member]

CityView at Longwood [Member]

Clarendon, The [Member]

Cleveland House [Member]

Colorado Pointe [Member]

Columbia Crossing [Member]

Connecticut Heights [Member]

Copper Canyon [Member]

Deerwood (SD) [Member]

DelMarRidge [Member]

East 39th [Member]

Estates at Tanglewood [Member]

Fairchase [Member]

Fairfield [Member]

Fine Arts Building [Member]

Flats at DuPont Circle [Member]

Gaia Building [Member]

Gaithersburg Station [Member]

Gateway at Malden Center [Member]

Glo [Member]

Hathaway [Member]

Heights on Capitol Hill [Member]

Heritage at Stone Ridge [Member]

Heronfield [Member]

Hoboken [Member]

Ivory Wood [Member]

Kelvin Court [Member]

La Terrazza at Colma Station [Member]

Laguna Clara [Member]

Liberty Park [Member]

Liberty Tower [Member]

Lindley [Member]

Longview Place [Member]

Market Street Village [Member]

Marks [Member]

Metro on First [Member]

Midtown 24 [Member]

Mill Creek [Member]

Miramar Lakes [Member]

Moda [Member]

Monte Viejo [Member]

Montierra [Member]

Mosaic at Metro [Member]

New River Cove [Member]

North Pier at Harborside [Member]

Northpark [Member]

Oak Mill Two [Member]

Oaks [Member]

Olympus Towers [Member]

Promenade [Member]

Providence [Member]

Reserve at Clarendon Centre, The [Member]

Reserve at Eisenhower, The [Member]

Reserve at Empire Lakes [Member]

Reserve at Fairfax Corners [Member]

Reserve at Potomac Yard [Member]

Reserve at Town Center (WA) [Member]

Rianna II [Member]

Rockingham Glen [Member]

San Mateo [Member]

Santa Clara [Member]

Siena Terrace [Member]

Skyview [Member]

South Market [Member]

South Winds [Member]

Stonegate C O [Member]

Stoney Ridge [Member]

Summerset Village [Member]

Talleyrand [Member]

Teresina [Member]

Toscana [Member]

Touriel Building [Member]

Town Square at Mark Center I [Member]

Uptown Square [Member]

Van Ness [Member]

Versailles [Member]

Versailles (K-Town) [Member]

Victor on Venice [Member]

Vintage [Member]

Vista on Courthouse [Member]

Water Park Towers [Member]

West 54th [Member]

Westgate (fka Westgate I) [Member]

Woodleaf [Member]

Wholly Owned Encumbered [Member]

Elliott 2300 [Member]

400 Park Aveue South (EQR) [Member]

400 Park Aveue South (Toll) [Member] [Member]

Canyon Ridge [Member]

Country Oaks [Member]

East Palmetto Park [Member]

Fox Ridge [Member]

Hudson Crossing Two [Member]

Monterra in Mill Creek [Member]

Park Aire [Member]

Strayhorse at Arrowhead Ranch [Member]

Ventura [Member]

Wood Creek II (fka Willow Brook)

Partially Owned Unencumbered [Member]

Bellevue Meadows [Member]

Canyon Creek C [Member]

Elliot Bay [Domain]

Isle at Arrowhead Ranch [Member]

Lantern Cove [Member]

Rosecliff [Member]

Schooner Bay One [Member]

Schooner Bay Two [Member]

Surrey Downs [Member]

Virgil Square [Member]

Wisconsin Place [Domain]

Partially Owned Encumbered [Member]

Portfolio Entity Encumbrances [Member]

Total Consolidated Investment in Real Estate [Member]

Unconsolidated Operating [Domain]

Depreciable Property [Member]

Building [Member]

Renovations and Improvements Minimum [Member]

Renovations and Improvements Maximum [Member]

Replacements Minimum [Member]

Replacements Maximum [Member]

Management Business Renovations and Improvements Minimum [Member] [Member]

Management Business Renovations and Improvements Maximum [Member] [Member]

Real Estate and Accumulated Depreciation [Line Items]

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Fixtures and Equipment, Gross

$1,214,220,000

$1,343,765,000

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$1,214,220,221

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Land And Depreciable Property Net

15,200,000,000

11,200,000,000

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Real Estates And Accumulated Depreciation Abstract

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Real Estate And Accumulated Depreciation Description Of Location

'

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'

'Washington, D.C.

'Alexandria, VA (G)

'Washington, D.C. (G)

'Washington, D.C. (G)

'New York, NY

'Brooklyn, NY (G)

'Anaheim, CA

'Seattle, WA

'Arlington, VA (G)

'Arlington, VA (G)

'Washington, D.C. (G)

'New York, NY

'Washington, D.C. (G)

'New York, NY (G)

'Jersey City, NJ (G)

'New York, NY (G)

'San Francisco, CA

'New York, NY (G)

'San Francisco, CA

'Daly City, CA (G)

'Abington, MA

'Agoura Hills, CA

'Washington, D.C.

'Sunnyvale, CA

'Canton, MA

'Orlando, FL

'Los Angeles, CA

'Corona Hills, CA

'Orlando, FL

'Redwood City, CA

'San Francisco, CA

'Denver, CO (G)

'Oviedo, FL

'Long Beach, CA

'New York, NY

'Mukilteo, WA (G)

'Bellevue, WA

'Marina Del Ray, CA

'Bellevue, WA (G)

'Berkeley, CA

'Boston, MA (G)

'Newington, CT

'Vernon, CT

'Sunnyvale, CA

'Greensboro, NC

'Brooklyn, NY (G)

'Brooklyn, NY (G)

'Boulder, CO

'Cambridge, MA (G)

'Alexandria, VA

'Seattle, WA

'Seattle, WA

'Seattle, WA (G)

'Ontario, CA

'Ontario, CA

'Denver, CO

'Los Angeles, CA

'Coconut Creek, FL

'Arlington, VA (G)

'Boynton Beach, FL

'Boynton Beach, FL

'San Mateo, CA

'Waltham, MA (G)

'Orlando, FL

'Arlington, VA

'Cupertino, CA

'Orlando, FL

'Lakewood, CO

'Taunton, MA

'Corona, CA

'San Diego, CA

'Washington, D.C. (G)

'Chino Hills, CA

'Bethesda, MD

'Dublin, CA

'Boston, MA (G)

'Emeryville, CA

'Encinitas, CA (G)

'Deerfield Beach, FL

'Coconut Creek, FL

'Sherman Oaks, CA

'Wellington, FL

'Washington, D.C.

'Enfield, CT

'Fremont, CA (G)

'Coral Gables, FL (G)

'Hermosa Beach, CA

'Pembroke Pines, FL

'Plantation, FL

'Redmond, WA

'San Francisco, CA

'Franklin, MA

'Glendale, CA

'Bowie, MD

'Rocky Hill , CT

'Centennial, CO

'Centennial, CO

'Pleasanton, CA

'Beverly Hills, CA

'Miami, FL

'Los Angeles, CA

'Seattle, WA (G)

'Lynwood, WA

'Boynton Beach, FL

'Ellington, CT

'Westwood, MA

'Westwood, MA

'Cherry Hills, NJ

'South Plainfield, NJ

'Los Angeles, CA (G)

'New York, NY (G)

'Jersey City, NJ

'Charlotte, NC

'Everett, WA

'Los Angeles, CA (G)

'Cambridge, MA

'Burbank, CA

'Miami, FL

'Orlando, FL

'Pembroke Pines, FL

'W. New York, NJ

'Highlands Ranch, CO

'Quincy, MA

'Arlington, VA

'New York, NY (G)

'Boston, MA (G)

'New York, NY (G)

'Marina Del Rey, CA

'Corona Hills, CA

'Bellevue, WA

'Los Angeles, CA (G)

'Irvine, CA

'San Jose, CA

'Hyattsville, MD

'Mountain View, CA

'Los Angeles, CA

'New York, NY (G)

'Valencia, CA

'Germantown, MD

'Pleasant Hill, CA

'Germantown, MD

'Agoura Hills, CA

'Agoura Hills, CA

'Falls Church, VA

'Boston, MA (G)

'Arlington, VA

'Marina Del Rey, CA

'Delray Beach, FL

'Delray Beach, FL

'Solana Beach, CA

'Key West, FL

'Redmond, WA

'San Francisco, CA

'Lynnwood, WA

'Davie, FL

'New York, NY (G)

'New York, NY (G)

'New York, NY (G)

'New York, NY (G)

'Coral Springs, FL

'Washington, D.C.

'Los Angeles, CA

'Denver, CO

'Union City, CA

'Los Angeles, CA (G)

'Arlington, VA (G)

'Wellesley, MA

'Playa Del Rey, CA

'Hermosa Beach, CA

'Chino Hills, CA

'Valencia, CA

'Jersey City, NJ (G)

'San Francisco, CA

'Deerfield Beach, FL

'Arlington, VA

'Aventura, FL

'Valencia, CA

'Valencia, CA

'Coral Springs, FL

'Corona, CA

'Quincy, MA

'Redmond , WA (G)

'Miami, FL (G)

'Bellevue, WA

'Huntington Beach, CA

'Berkeley, CA (G)

'Boynton Beach, FL

'Mill Creek, WA

'Mill Creek, WA

'Pompano Beach, FL (G)

'Pasadena, CA

'Pasadena, CA

'Redmond, WA

'Seattle, WA (G)

'San Diego, CA

'San Francisco, CA

'Redwood City, CA

'Redwood City, CA

'New York, NY (G)

'Redmond, WA (G)

'Windsor, CT

'Norwalk, CT

'Amherst, MA

'Milford, MA

'Quincy, MA

'Arlington, VA (G)

'Orlando, FL

'Coral Springs, FL

'Everett, WA

'Los Angeles, CA (G)

'Sausalito, CA

'Aurora, CO

'Aurora, CO

'Rockville, MD

'Seattle, WA

'Winter Springs, FL

'Arlington, VA

'Dania Beach, FL

'Dania Beach, FL

'Valencia, CA

'Union City, CA

'Burlingame, CA

'Falls Church, VA (G)

'Foothill Ranch, CA

'San Francisco, CA (G)

'Palo Alto, CA

'Riverside, CA

'Coconut Creek, FL

'Chatsworth, CA

'Farmington, CT

'Seattle, WA

'Seattle, WA

'San Jose, CA

'New York, NY (G)

'San Francisco, CA (G)

'Cambridge, MA (G)

'Orlando, FL

'St. Charles, MD

'Alexandria, VA

'New York, NY (G)

'New York, NY (G)

'New York, NY (G)

'Seattle, WA (G)

'Seattle, WA

'San Diego, CA (G)

'Redmond, WA (G)

'Silver Spring, MD (G)

'Laguna Hills, CA

'Lakewood, CO

'Los Angeles, CA

'Arlington, VA (G)

'Mission Viejo, CA

'Cambridge, MA

'Thornton, CO

'Watertown, MA (G)

'Needham, MA

'Sunrise, FL

'New York, NY (G)

'Boston, MA (G)

'Seattle, WA

'Waldorf, MD (G)

'Rockville, MD

'New York, NY (G)

'Los Angeles, CA

'Los Angeles, CA

'Los Angeles, CA

'Los Angeles, CA

'Los Angeles, CA

'Los Angeles, CA

'Los Angeles, CA

'Los Angeles, CA

'Westwood, MA

'Laguna Niguel, CA

'Pembroke Pines, FL

'Pleasant Hill, CA

'Newington, CT

'Kirkland, WA

'East Palo Alto, CA (G)

'Chicago, IL

'Chicago, IL

'

'New York, NY (G)

'Arlington, VA

'Washington, D.C.

'Chevy Chase, MD (G)

'San Mateo, CA

'Cambridge, MA (G)

'North Hollywood, CA

'Pasadena, CA

'Berkeley, CA (G)

'Fremont, CA

'Sunnyvale, CA

'Berkeley, CA (G)

'Northridge, CA

'Anaheim, CA

'Boston, MA (G)

'Berkeley, CA (G)

'Woodland Hills, CA

'Berkeley, CA (G)

'Marina Del Rey, CA

'Santa Monica, CA (G)

'Washington, D.C.

'New York, NY (G)

'Germantown, MD

'San Diego, CA

'New York, NY (G)

'Redmond, WA

'Cambridge, MA (G)

'Santa Monica, CA

'Fullerton, CA (G)

'Boston, MA (G)

'Arlington, VA (G)

'Washington, D.C.

'Denver, CO

'Arlington, VA

'Washington, D.C.

'Highlands Ranch, CO

'San Diego, CA

'San Diego, CA

'New York, NY (G)

'Westminster, CO

'Fairfax, VA

'Stamford, CT (G)

'Berkeley, CA (G)

'Washington, D.C.

'Berkeley, CA (G)

'Gaithersburg, MD (G)

'Malden, MA (G)

'Los Angeles, CA (G)

'Long Beach, CA

'Seattle, WA (G)

'Burlington, MA

'Kirkland, WA

'Hoboken, NJ

'Bothell, WA

'Irvine, CA

'Colma, CA (G)

'Santa Clara, CA

'Brain Tree, MA

'Arlington, VA (G)

'Encino, CA

'Waltham, MA

'San Diego, CA

'Englewood, CO (G)

'Seattle, WA (G)

'Plantation, FL (G)

'Milpitas, CA

'Miramar, FL

'Seattle, WA (G)

'Phoenix, AZ

'San Diego, CA

'Hyattsville, MD

'Davie, FL

'Jersey City, NJ

'Burlingame, CA

'Germantown, MD

'Santa Clarita, CA

'Seattle, WA (G)

'Santa Monica, CA (G)

'Bothell, WA

'Arlington, VA (G)

'Alexandria, VA

'Rancho Cucamonga, CA

'Fairfax, VA

'Alexandria, VA

'Mill Creek, WA

'Seattle, WA (G)

'West Roxbury, MA

'San Mateo, CA (G)

'Santa Clara, CA

'Lake Forest, CA

'Rancho Santa Margarita, CA

'San Francisco, CA (G)

'Fall River, MA

'Broomfield, CO

'Dale City, VA

'Chatsworth, CA

'Tarrytown, NY

'Chula Vista, CA

'Irvine, CA

'Berkeley, CA (G)

'Alexandria, VA

'Denver, CO (G)

'Washington, D.C.

'Woodland Hills, CA

'Los Angeles, CA

'Los Angeles, CA (G)

'Ontario, CA

'Arlington, VA

'Arlington, VA

'New York, NY (G)

'Pasadena, CA

'Campbell, CA

'

'Seattle, WA

'New York, NY

'New York, NY

'San Diego, CA

'Agoura Hills, CA

'Boca Raton, FL

'Englewood, CO

'New York, NY

'Mill Creek, WA

'Wellington, FL

'Glendale, AZ

'Ventura, CA

'Pleasant Hill, CA

'

'Bellevue, WA

'San Ramon, CA

'Seattle, WA (G)

'Glendale, AZ

'Foster City, CA

'Quincy, MA

'Foster City, CA

'Foster City, CA

'Bellevue, WA

'Los Angeles, CA

'Chevy Chase, MD

'

'

'

'

'

'

'

'

'

'

'

'

Real Estate And Accumulated Depreciation Units

'

'

'

'

0

0

144

556

0

113

0

0

188

219

359

155

559

135

480

238

102

294

0

95

90

178

229

175

156

336

118

492

480

123

0

354

233

160

302

235

1

102

191

0

420

64

150

192

0

193

490

144

312

317

0

0

408

312

100

480

92

301

396

252

296

192

281

352

181

311

316

201

58

316

168

120

252

122

324

444

261

120

300

278

174

400

0

168

322

195

169

296

312

180

164

288

264

478

151

291

266

540

35

296

259

758

197

192

100

180

102

170

252

128

259

182

0

381

0

186

141

480

672

358

276

422

336

212

293

710

98

623

336

67

99

0

108

242

180

272

270

234

304

221

208

220

224

176

94

162

597

196

128

146

297

192

0

104

768

137

166

177

324

257

142

444

476

208

322

298

49

354

285

176

216

527

0

540

256

296

294

270

332

330

316

250

404

206

310

34

440

100

0

225

0

0

321

78

408

0

304

149

323

319

373

92

204

304

130

314

400

275

123

230

198

444

168

121

96

280

597

240

648

264

174

138

939

300

360

100

0

284

0

186

150

0

0

111

117

471

314

0

272

354

455

516

0

176

679

322

457

272

472

0

231

608

232

336

134

77

304

207

310

0

491

192

163

204

21

23

36

36

60

18

53

156

344

464

256

73

288

1,811

0

0

67,220

506

326

202

513

241

127

248

143

71

442

410

21

140

162

241

44

579

56

224

101

136

261

544

384

266

113

85

70

183

295

292

214

193

247

518

222

316

181

254

504

392

263

100

306

91

389

203

201

385

104

180

202

301

144

132

153

264

202

235

129

348

229

616

102

247

516

344

251

480

272

260

316

297

510

192

520

328

58

200

252

226

467

652

588

389

78

143

575

450

356

260

410

404

350

264

280

300

440

563

35

406

696

625

253

225

115

300

220

362

222

480

178

32,101

92

0

0

162

256

0

300

0

139

0

136

192

228

1,505

180

268

147

256

232

156

168

144

122

142

432

2,247

0

103,073

'

'

'

'

'

'

'

'

'

Initial Cost to Company, Land

'

'

'

'

15,600,000

18,937,702

9,213,512

54,638,298

0

22,037,831

5,865,235

22,106,464

11,321,198

21,900,000

30,006,593

39,277,000

28,150,000

32,852,000

28,108,899

22,611,600

5,249,124

65,352,706

42,367,171

7,786,800

553,105

16,700,000

18,900,000

9,057,300

4,685,900

5,500,000

8,000,400

2,594,264

3,808,823

7,995,000

32,855,115

5,481,556

6,990,000

7,600,000

114,351,405

5,686,861

63,158

9,098,808

15,100,000

13,908,910

106,100,000

401,091

928,972

9,991,500

1,100,564

32,400,000

40,099,922

3,600,400

31,200,000

10,000,000

12,198,278

11,553,286

9,700,000

5,616,000

1,820,000

4,803,100

6,615,467

3,001,700

0

12,600,000

14,800,000

9,606,600

32,300,000

12,009,630

17,200,000

40,400,000

7,000,000

1,609,800

498,080

4,742,200

15,100,000

13,500,000

1,808,900

13,092,552

25,900,000

14,855,000

12,300,000

12,000,000

15,000,000

5,560,000

8,700,000

20,000,000

11,771,446

1,129,018

25,800,000

0

18,144,000

1,896,600

2,228,200

2,306,100

1,722,400

2,339,330

0

19,845,000

911,534

4,365,000

3,990,000

43,200,000

7,772,000

319,180

10,806,000

59,390,179

6,895,000

1,546,700

583,679

2,229,095

0

6,800,000

10,080,000

9,435,760

23,420,000

5,350,000

100,000

1,597,500

14,791,831

23,300,000

14,100,000

19,200,000

23,520,000

17,900,000

27,246,045

6,330,000

5,928,400

20,100,000

73,170,045

53,164,160

22,346,513

0

6,888,500

3,200,000

8,125,216

10,743,027

5,190,700

4,120,800

27,000,000

8,500,000

75,800,000

9,360,000

15,000,000

5,527,800

10,000,000

1,706,900

1,683,800

20,240,000

22,200,000

15,400,000

0

5,900,000

3,840,000

5,111,200

2,838,749

4,807,100

30,952,393

480,600

38,400,000

40,504,000

37,600,000

52,654,000

102,163,000

15,420,000

13,700,000

3,033,500

8,330,000

6,246,700

18,094,052

28,300,000

816,922

60,900,000

35,100,000

3,572,400

8,640,000

22,487,006

40,830,011

13,500,000

32,000,000

13,320,000

14,700,000

13,500,000

6,640,000

2,272,800

26,900,000

15,546,376

27,383,547

10,300,000

1,857,400

2,458,000

3,520,400

4,310,417

2,089,388

5,783,545

17,859,785

12,118,061

6,975,705

2,268,160

11,809,500

42,000,000

34,963,355

17,136,645

118,669,441

14,355,000

3,325,517

2,300,000

1,340,702

2,012,350

4,922,840

31,400,000

2,800,000

1,951,600

2,500,000

14,641,990

26,000,000

5,450,295

659,165

1,815,000

663,800

6,000,000

3,342,381

12,000,000

18,313,414

10,560,000

1,781,600

16,836,000

78,278,200

7,503,400

68,900,000

6,936,600

18,200,000

5,680,000

260,646

1,757,438

1,424,700

16,807,519

27,679,638

0

14,087,610

26,767,171

6,280,000

1,500,000

15,568,464

103,539,100

139,933,500

144,968,250

12,542,418

8,800,000

9,403,960

15,322,724

18,539,817

1,665,100

4,519,700

79,175,802

0

4,525,800

12,448,888

5,040,000

16,800,000

1,418,893

3,648,000

84,800,000

469,546

11,726,305

11,900,000

10,600,000

64,900,000

34,200,000

1,785,000

1,955,000

3,060,000

3,060,000

5,100,000

1,530,000

4,505,000

1,616,505

2,662,900

18,561,000

9,729,900

498,377

6,631,400

72,627,418

0

0

4,699,200,739

190,600,000

9,780,000

13,000,000

76,921,130

21,041,710

3,252,993

25,000,000

5,839,548

5,550,000

24,310,000

26,650,000

1,642,000

7,000,000

12,960,000

0

3,439,000

31,682,754

4,377,000

0

12,600,000

12,600,000

79,400,000

2,781,300

2,288,300

59,900,000

3,397,100

5,220,000

9,000,000

6,863,792

14,704,898

30,400,340

18,300,000

5,790,000

23,500,000

27,600,000

1,442,212

2,082,095

7,801,824

48,900,000

7,560,000

23,500,000

6,510,200

7,817,000

35,200,000

7,113,000

17,500,000

9,209,780

16,047,022

2,512,500

5,425,000

10,800,000

9,245,000

27,900,000

2,732,800

10,752,145

0

13,642,420

5,977,504

16,382,822

5,805,000

20,880,000

13,740,000

4,928,500

8,540,000

10,129,900

12,858,693

17,200,000

12,649,228

12,700,000

8,160,000

0

15,800,000

4,000,159

38,607,000

854,133

23,400,000

14,752,034

9,000,000

3,573,621

10,500,000

6,500,000

16,345,000

15,804,057

11,918,917

10,369,400

2,161,840

1,124,217

71,900,000

0

8,900,000

3,380,000

79,900,000

2,481,821

8,750,000

8,000,000

2,629,804

12,000,000

28,600,000

39,410,000

2,736,000

24,360,000

17,492,000

56,300,000

12,650,000

10,590,975

10,350,000

7,059,230

15,550,260

34,400,000

60,900,000

22,898,848

8,550,600

1,935,536,426

796,800

76,292,169

58,090,357

4,869,448

6,105,000

20,200,000

2,490,000

5,000,000

2,800,000

8,000,000

4,400,000

8,600,000

5,055,000

202,698,774

4,507,100

5,425,000

7,600,000

1,650,237

6,945,000

5,460,000

5,345,000

4,550,000

3,057,100

5,500,000

0

50,039,437

'

6,887,475,376

'

'

'

'

'

'

'

'

'

Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements

'

'

'

'

912,267

83,371,939

36,559,189

40,361,702

44,799,315

53,962,169

1,823,393

4,717,126

49,615,688

79,242,161

114,013,785

23,026,984

138,600,000

43,140,551

236,965,215

77,492,171

18,609,876

65,747,294

3,280,863

31,587,325

3,697,396

30,344,413

90,351,467

18,483,642

10,992,751

28,600,796

36,074,600

33,042,398

29,322,243

18,005,000

33,412,715

51,658,741

15,740,825

27,437,239

165,648,595

26,070,540

248,929

28,701,192

42,169,280

5,082,581

167,711,384

2,681,210

6,209,988

22,247,278

792,508

93,317,261

221,435,831

10,211,159

106,752,364

51,367,913

4,063,175

2,711,440

70,080,378

23,485,891

9,528,898

34,894,898

14,829,335

17,678,928

87,821,045

31,469,651

37,874,719

21,193,232

85,723,236

44,407,977

48,253,858

96,638,206

27,654,816

10,832,754

3,329,560

20,272,892

41,147,185

27,120,388

16,274,361

43,907,448

84,551,331

57,566,636

61,845,626

29,419,415

33,194,576

19,939,324

25,446,003

64,790,850

6,095,393

7,547,256

79,290,493

44,601,000

46,567,941

17,070,795

20,056,270

12,064,015

15,471,429

16,133,588

68,325,277

73,335,916

6,093,418

38,372,440

35,846,708

129,637,659

16,864,269

12,513,467

30,335,330

158,829,432

18,983,597

7,774,676

3,901,774

16,828,153

19,875,857

21,459,108

37,526,912

32,564,240

69,977,699

41,114,074

0

14,367,864

71,969,127

78,968,911

24,662,883

48,379,586

75,068,206

24,460,989

37,741,050

37,557,013

33,595,262

68,361,638

53,962,510

185,928,608

61,501,158

169,967,439

21,604,584

9,616,264

27,378,784

6,214,141

9,679,109

42,477,297

33,338,325

52,529,446

103,623,712

20,778,553

23,142,302

14,691,705

13,155,522

15,362,666

15,154,608

20,152,616

28,934,606

35,735,963

121,554,078

25,310,444

17,490,066

11,910,438

25,545,009

14,126,038

3,124,964

4,372,033

105,693,432

18,025,679

9,855,597

23,045,751

108,989,402

36,064,629

59,460,861

27,302,383

28,667,618

11,827,453

81,905,948

79,387,601

5,460,955

90,085,898

33,473,822

14,660,994

21,487,126

96,842,913

2,683,265

60,011,208

64,436,539

30,353,748

35,390,279

34,405,636

26,743,760

20,546,289

84,983,599

65,320,010

99,656,440

33,713,933

16,713,254

4,542,000

23,332,494

17,165,142

16,339,822

39,334,455

83,708,925

19,127,918

46,175,001

14,864,482

34,004,048

7,574,181

85,202,482

40,832,170

98,880,559

80,894,049

22,573,826

7,406,730

8,962,317

13,452,150

30,202,160

109,727,825

23,687,893

17,570,508

12,021,256

42,858,010

28,714,965

38,765,670

21,271,331

7,608,126

5,974,803

21,719,768

31,337,332

23,170,580

47,091,594

25,574,457

16,731,916

35,414,000

91,485,591

24,048,507

80,240,812

14,324,069

0

19,812,090

0

11,748,112

12,852,461

6,589,411

21,699,903

58,794,517

16,314,151

218,770,581

32,121,779

3,896

55,029,607

94,082,725

190,964,745

138,346,681

64,979,196

22,188,288

190,596,040

76,176,594

130,407,365

14,985,678

40,676,390

7,944,921

86,431,862

40,736,293

52,044,448

29,946,419

34,335,683

9,485,006

17,620,879

67,824,685

163,123,022

6,992,695

90,134,491

44,416,692

61,792,095

57,431,465

3,233,254

3,541,435

5,538,871

5,539,390

9,224,485

3,023,523

10,758,900

10,806,004

23,985,497

49,527,569

23,009,768

3,331,548

16,735,484

57,608,771

0

680,439

11,787,198,737

133,101,447

89,668,165

75,723,794

153,947,682

71,931,323

21,745,595

23,593,194

29,360,452

15,785,509

59,214,129

62,850,000

9,152,518

20,537,359

18,497,683

115,095,512

13,866,379

121,095,786

16,022,110

72,690,403

34,635,854

43,815,169

79,936,285

32,942,531

20,596,281

156,987,648

9,289,074

16,744,643

17,083,391

36,476,208

79,195,102

103,824,660

66,826,715

28,815,607

53,437,514

114,728,311

16,251,114

18,739,815

36,948,176

96,938,591

51,256,538

88,292,669

39,690,120

26,462,772

109,508,602

25,623,826

74,677,374

25,722,666

48,650,963

22,611,912

21,138,028

31,808,335

27,017,749

170,002,320

13,888,282

34,649,929

41,251,044

29,707,475

26,749,111

83,817,078

25,705,000

90,255,509

40,757,301

44,622,314

12,209,981

58,770,100

57,168,503

51,487,235

36,842,012

45,926,784

29,360,938

59,580,898

46,142,895

94,290,590

77,477,449

10,233,947

61,020,438

73,335,425

14,079,234

19,055,505

52,812,935

34,585,060

73,080,670

63,129,050

68,862,641

41,172,081

14,433,614

7,515,160

213,372,253

124,542,070

24,083,024

21,952,863

178,635,578

16,780,359

32,950,375

24,147,091

23,670,889

49,838,160

61,916,670

50,806,072

7,810,027

86,178,714

100,696,541

142,204,077

33,656,292

44,409,025

35,433,437

47,677,762

69,449,740

109,218,415

48,772,556

133,553,242

16,988,182

6,183,275,205

7,173,725

96,230,632

38,681,373

11,955,063

29,561,865

281,641

17,522,114

0

13,255,122

39,445,363

12,968,002

44,580,294

38,388,672

350,043,866

12,574,814

18,812,120

36,066,728

19,593,123

23,064,976

15,721,570

20,390,618

18,064,764

7,848,618

15,216,613

172,089,355

359,443,299

'

18,679,961,107

'

'

'

'

'

'

'

'

'

Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures

'

'

'

'

0

0

403,220

12,040,625

0

755,257

0

0

338,120

490,601

1,705,104

3,504,909

2,871,585

286,906

471,854

10,684,866

81,627

1,095,560

0

1,295,347

2,493,689

118,825

116,906

2,487,094

2,600,866

3,810,685

168,636

6,733,646

7,105,642

956,348

0

4,340,240

2,889,445

913,982

124,512

942,474

-5,320

162,958

761,135

0

190,386

813,895

1,655,316

2,873,885

0

79,289

375,977

2,563,906

739,806

4,358,788

0

0

5,479,205

3,045,795

689,904

5,106,249

3,750,349

3,775,228

1,017,095

4,284,433

0

3,381,227

203,018

394,460

132,258

128,241

2,156,145

2,301,254

759,777

4,232,556

141,192

244,693

7,191,652

261,029

128,390

16,265,605

419,601

82,422

1,855,969

4,248,969

684,532

2,259,739

0

1,859,467

240,019

7,018,667

2,098,129

6,124,047

7,677,923

4,903,326

2,672,731

3,870,079

267,514

1,157,259

723,069

1,900,765

2,296,465

203,048

1,372,560

4,353,249

3,107,298

12,492,799

750,513

2,385,724

1,148,051

2,709,281

144,851

804,080

929,736

153,706

1,630,936

2,100,163

0

4,786,996

0

579,275

2,620,056

4,274,318

4,640,640

5,339,378

7,207,921

2,438,295

11,206,707

44,726

1,179,807

77,215,801

168,161

1,355,945

3,037,350

2,722,147

268,483

0

3,349,695

490,649

164,351

1,325,352

579,164

1,969,605

10,244,672

9,851,592

7,562,822

4,040,864

4,089,342

3,779,190

102,228

63,451

597,665

298,806

1,190

2,435,992

3,993,374

4,373,660

0

1,533,264

4,031,375

4,828,502

5,764,055

7,619,769

6,956,519

1,229,572

93,329

7,330,685

3,057,365

3,833,813

2,015,760

145,906

1,038,416

407,504

8,011,904

3,352,092

2,646,783

18,435,833

0

9,643,309

965,087

6,552,908

2,206,279

1,985,501

5,005,200

5,691,127

140,458

504,378

1,497,545

294,313

5,247,158

105,946

6,605,628

64,229

0

894,691

0

0

224,446

266,542

4,287,842

0

628,146

650,300

4,123,564

129,922

3,026,927

2,346,640

3,899,396

5,371,687

376,039

67,784

6,932,172

6,418,274

567,364

280,897

169,663

3,156,829

59,151

2,828,563

3,562,306

2,122,402

12,888,683

1,772,157

17,044,266

2,239,072

1,914,660

3,846,309

30,593,973

1,897,617

413,552

2,992,190

0

4,291,946

0

3,297,807

4,247,599

0

0

84,180

602,473

2,768,015

1,291,995

0

493,433

3,132,394

8,737,813

7,605,676

0

394,029

4,923,730

55,022

840,456

8,837,465

5,372,025

0

782,084

15,232,854

2,469,745

1,737,955

47,280

1,182,355

5,771,885

556,573

660,903

0

225,033

113,249

212,358

363,066

305,913

194,242

288,802

297,249

510,334

274,577

486,606

2,100,152

8,186,273

2,587,408

6,379,038

1,162,730

3,227,436

6,957,995

97,861,963

0

900,502,358

561,190

469,955

580,537

6,804,185

4,270,861

5,251,116

6,920,021

336,928

159,258

2,849,892

696,941

114,811

977,155

1,248,387

94,558

115,944

2,565,629

305,173

49,738

128,778

110,763

238,142

14,871,303

10,356,205

54,996

1,706,006

1,561,158

34,231

654,735

8,167,305

1,754,620

171,023

552,283

547,130

303,660

1,604,884

13,788,977

3,033,539

208,601

2,577,858

75,367

6,195,719

199,005

182,015

208,640

37,618

9,753,016

221,243

7,390,659

181,923

909,763

1,544,319

166,997

679,844

163,968

615,479

4,094,793

2,759,086

858,516

599,231

3,174,207

884,586

11,262,819

415,057

1,225,984

3,728,226

2,023,326

687,636

1,259,854

7,185,662

318,502

1,517,594

2,379,299

10,317,077

6,491,391

3,457,727

3,951,724

25,302

719,661

3,634,286

1,325,152

1,922,681

4,057,506

5,233,629

2,154,112

73,166

2,012,885

662,020

239,471

5,585,518

2,131,723

1,278,976

4,774,276

3,114,108

5,705,255

6,252,474

4,046,367

2,255,817

7,547,102

170,436

2,852,824

3,261,624

1,315,370

4,979,374

291,622

261,071

367,174

643,404

1,853,467

134,368

278,435

3,978,891

279,055,895

6,169,587

0

0

1,979,252

3,477,905

0

4,304,324

0

554,347

0

377,633

121,646

3,585,226

20,569,920

4,287,572

6,335,761

424,904

1,988,568

5,303,293

2,387,533

4,467,622

4,093,294

2,309,004

1,659,199

126,994

33,383,744

'

1,233,511,917

'

'

'

'

'

'

'

'

'

Gross Amount Carried at close of period 12/31/2013, Land

'

'

'

'

15,600,000

18,937,702

9,213,512

54,638,298

0

22,037,831

5,865,235

22,106,464

11,321,198

21,900,000

30,006,593

39,277,000

28,150,000

32,852,000

28,108,899

22,611,600

5,249,124

65,352,706

42,367,171

7,786,800

553,105

16,700,000

18,900,000

9,057,300

4,685,900

5,500,000

8,000,400

2,594,264

3,808,823

7,995,000

32,855,115

5,481,556

6,990,000

7,600,000

114,351,405

5,686,861

63,158

9,098,808

15,100,000

13,908,910

106,100,000

401,091

928,972

9,991,500

1,100,564

32,400,000

40,099,922

3,600,400

31,200,000

10,000,000

12,198,278

11,553,286

9,700,000

5,616,000

1,820,000

4,803,100

6,615,467

3,001,700

0

12,600,000

14,800,000

9,606,600

32,300,000

12,009,630

17,200,000

40,400,000

7,000,000

1,609,800

498,080

4,742,200

15,100,000

13,500,000

1,808,900

13,092,552

25,900,000

14,855,000

12,300,000

12,000,000

15,000,000

5,560,000

8,700,000

20,000,000

11,771,446

1,129,018

25,800,000

0

18,144,000

1,896,600

2,228,200

2,306,100

1,722,400

2,339,330

0

19,845,000

911,534

4,365,000

3,990,000

43,200,000

7,772,000

319,180

10,806,000

59,390,179

6,895,000

1,546,700

583,679

2,229,095

0

6,800,000

10,080,000

9,435,760

23,420,000

5,350,000

100,000

1,597,500

14,791,831

23,300,000

14,100,000

19,200,000

23,520,000

17,900,000

27,246,045

6,330,000

5,928,400

20,100,000

73,170,045

53,164,160

22,346,513

0

6,888,500

3,200,000

8,125,216

10,743,027

5,190,700

4,120,800

27,000,000

8,500,000

75,800,000

9,360,000

15,000,000

5,527,800

10,000,000

1,706,900

1,683,800

20,240,000

22,200,000

15,400,000

0

5,900,000

3,840,000

5,111,200

2,838,749

4,807,100

30,952,393

480,600

38,400,000

40,504,000

37,600,000

52,654,000

102,163,000

15,420,000

13,700,000

3,033,500

8,330,000

6,246,700

18,094,052

28,300,000

816,922

60,900,000

35,100,000

3,572,400

8,640,000

22,487,006

40,830,011

13,500,000

32,000,000

13,320,000

14,700,000

13,500,000

6,640,000

2,272,800

26,900,000

15,546,376

27,383,547

10,300,000

1,857,400

2,458,000

3,520,400

4,310,417

2,089,388

5,783,545

17,859,785

12,118,061

6,975,705

2,268,160

11,809,500

42,000,000

34,963,355

17,136,645

118,669,441

14,355,000

3,325,517

2,300,000

1,340,702

2,012,350

4,922,840

31,400,000

2,800,000

1,951,600

2,500,000

14,641,990

26,000,000

5,450,295

659,165

1,815,000

663,800

6,000,000

3,342,381

12,000,000

18,313,414

10,560,000

1,781,600

16,836,000

78,278,200

7,503,400

68,900,000

6,936,600

18,200,000

5,680,000

260,646

1,757,438

1,424,700

16,807,519

27,679,638

0

14,087,610

26,767,171

6,280,000

1,500,000

15,568,464

103,539,100

139,933,500

144,968,250

12,542,418

8,800,000

9,403,960

15,322,724

18,539,817

1,665,100

4,519,700

79,175,802

0

4,525,800

12,448,888

5,040,000

16,800,000

1,418,893

3,648,000

84,800,000

469,546

11,726,305

11,900,000

10,600,000

64,900,000

34,200,000

1,785,000

1,955,000

3,060,000

3,060,000

5,100,000

1,530,000

4,505,000

1,616,505

2,662,900

18,561,000

9,729,900

498,377

6,631,400

72,627,418

0

0

4,699,200,739

190,600,000

9,780,000

13,000,000

76,921,130

21,041,710

3,252,993

25,000,000

5,839,548

5,550,000

24,310,000

26,650,000

1,642,000

7,000,000

12,960,000

0

3,439,000

31,682,754

4,377,000

0

12,600,000

12,600,000

79,400,000

2,781,300

2,288,300

59,900,000

3,397,100

5,220,000

9,000,000

6,863,792

14,704,898

30,400,340

18,300,000

5,790,000

23,500,000

27,600,000

1,442,212

2,082,095

7,801,824

48,900,000

7,560,000

23,500,000

6,510,200

7,817,000

35,200,000

7,113,000

17,500,000

9,209,780

16,047,022

2,512,500

5,425,000

10,800,000

9,245,000

27,900,000

2,732,800

10,752,145

0

13,642,420

5,977,504

16,382,822

5,805,000

20,880,000

13,740,000

4,928,500

8,540,000

10,129,900

12,858,693

17,200,000

12,649,228

12,700,000

8,160,000

0

15,800,000

4,000,159

38,607,000

854,133

23,400,000

14,752,034

9,000,000

3,573,621

10,500,000

6,500,000

16,345,000

15,804,057

11,918,917

10,369,400

2,161,840

1,124,217

71,900,000

0

8,900,000

3,380,000

79,900,000

2,481,821

8,750,000

8,000,000

2,629,804

12,000,000

28,600,000

39,410,000

2,736,000

24,360,000

17,492,000

56,300,000

12,650,000

10,590,975

10,350,000

7,059,230

15,550,260

34,400,000

60,900,000

22,898,848

8,550,600

1,935,536,426

796,800

76,292,169

58,090,357

4,869,448

6,105,000

20,200,000

2,490,000

5,000,000

2,800,000

8,000,000

4,400,000

8,600,000

5,055,000

202,698,774

4,507,100

5,425,000

7,600,000

1,650,237

6,945,000

5,460,000

5,345,000

4,550,000

3,057,100

5,500,000

0

50,039,437

'

6,887,475,376

'

'

'

'

'

'

'

'

'

Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures

'

'

'

'

912,267

83,371,939

36,962,409

52,402,327

44,799,315

54,717,426

1,823,393

4,717,126

49,953,808

79,732,762

115,718,889

26,531,893

141,471,585

43,427,457

237,437,069

88,177,037

18,691,503

66,842,854

3,280,863

32,882,672

6,191,085

30,463,238

90,468,373

20,970,736

13,593,617

32,411,481

36,243,236

39,776,044

36,427,885

18,961,348

33,412,715

55,998,981

18,630,270

28,351,221

165,773,107

27,013,014

243,609

28,864,150

42,930,415

5,082,581

167,901,770

3,495,105

7,865,304

25,121,163

792,508

93,396,550

221,811,808

12,775,065

107,492,170

55,726,701

4,063,175

2,711,440

75,559,583

26,531,686

10,218,802

40,001,147

18,579,684

21,454,156

88,838,140

35,754,084

37,874,719

24,574,459

85,926,254

44,802,437

48,386,116

96,766,447

29,810,961

13,134,008

4,089,337

24,505,448

41,288,377

27,365,081

23,466,013

44,168,477

84,679,721

73,832,241

62,265,227

29,501,837

35,050,545

24,188,293

26,130,535

67,050,589

6,095,393

9,406,723

79,530,512

51,619,667

48,666,070

23,194,842

27,734,193

16,967,341

18,144,160

20,003,667

68,592,791

74,493,175

6,816,487

40,273,205

38,143,173

129,840,707

18,236,829

16,866,716

33,442,628

171,322,231

19,734,110

10,160,400

5,049,825

19,537,434

20,020,708

22,263,188

38,456,648

32,717,946

71,608,635

43,214,237

0

19,154,860

71,969,127

79,548,186

27,282,939

52,653,904

79,708,846

29,800,367

44,948,971

39,995,308

44,801,969

68,406,364

55,142,317

263,144,409

61,669,319

171,323,384

24,641,934

12,338,411

27,647,267

6,214,141

13,028,804

42,967,946

33,502,676

53,854,798

104,202,876

22,748,158

33,386,974

24,543,297

20,718,344

19,403,530

19,243,950

23,931,806

29,036,834

35,799,414

122,151,743

25,609,250

17,491,256

14,346,430

29,538,383

18,499,698

3,124,964

5,905,297

109,724,807

22,854,181

15,619,652

30,665,520

115,945,921

37,294,201

59,554,190

34,633,068

31,724,983

15,661,266

83,921,708

79,533,507

6,499,371

90,493,402

41,485,726

18,013,086

24,133,909

115,278,746

2,683,265

69,654,517

65,401,626

36,906,656

37,596,558

36,391,137

31,748,960

26,237,416

85,124,057

65,824,388

101,153,985

34,008,246

21,960,412

4,647,946

29,938,122

17,229,371

16,339,822

40,229,146

83,708,925

19,127,918

46,399,447

15,131,024

38,291,890

7,574,181

85,830,628

41,482,470

103,004,123

81,023,971

25,600,753

9,753,370

12,861,713

18,823,837

30,578,199

109,795,609

30,620,065

23,988,782

12,588,620

43,138,907

28,884,628

41,922,499

21,330,482

10,436,689

9,537,109

23,842,170

44,226,015

24,942,737

64,135,860

27,813,529

18,646,576

39,260,309

122,079,564

25,946,124

80,654,364

17,316,259

0

24,104,036

0

15,045,919

17,100,060

6,589,411

21,699,903

58,878,697

16,916,624

221,538,596

33,413,774

3,896

55,523,040

97,215,119

199,702,558

145,952,357

64,979,196

22,582,317

195,519,770

76,231,616

131,247,821

23,823,143

46,048,415

7,944,921

87,213,946

55,969,147

54,514,193

31,684,374

34,382,963

10,667,361

23,392,764

68,381,258

163,783,925

6,992,695

90,359,524

44,529,941

62,004,453

57,794,531

3,539,167

3,735,677

5,827,673

5,836,639

9,734,819

3,298,100

11,245,506

12,906,156

32,171,770

52,114,977

29,388,806

4,494,278

19,962,920

64,566,766

97,861,963

680,439

12,687,701,095

133,662,637

90,138,120

76,304,331

160,751,867

76,202,184

26,996,711

30,513,215

29,697,380

15,944,767

62,064,021

63,546,941

9,267,329

21,514,514

19,746,070

115,190,070

13,982,323

123,661,415

16,327,283

72,740,141

34,764,632

43,925,932

80,174,427

47,813,834

30,952,486

157,042,644

10,995,080

18,305,801

17,117,622

37,130,943

87,362,407

105,579,280

66,997,738

29,367,890

53,984,644

115,031,971

17,855,998

32,528,792

39,981,715

97,147,192

53,834,396

88,368,036

45,885,839

26,661,777

109,690,617

25,832,466

74,714,992

35,475,682

48,872,206

30,002,571

21,319,951

32,718,098

28,562,068

170,169,317

14,568,126

34,813,897

41,866,523

33,802,268

29,508,197

84,675,594

26,304,231

93,429,716

41,641,887

55,885,133

12,625,038

59,996,084

60,896,729

53,510,561

37,529,648

47,186,638

36,546,600

59,899,400

47,660,489

96,669,889

87,794,526

16,725,338

64,478,165

77,287,149

14,104,536

19,775,166

56,447,221

35,910,212

75,003,351

67,186,556

74,096,270

43,326,193

14,506,780

9,528,045

214,034,273

124,781,541

29,668,542

24,084,586

179,914,554

21,554,635

36,064,483

29,852,346

29,923,363

53,884,527

64,172,487

58,353,174

7,980,463

89,031,538

103,958,165

143,519,447

38,635,666

44,700,647

35,694,508

48,044,936

70,093,144

111,071,882

48,906,924

133,831,677

20,967,073

6,462,331,100

13,343,312

96,230,632

38,681,373

13,934,315

33,039,770

281,641

21,826,438

0

13,809,469

39,445,363

13,345,635

44,701,940

41,973,898

370,613,786

16,862,386

25,147,881

36,491,632

21,581,691

28,368,269

18,109,103

24,858,240

22,158,058

10,157,622

16,875,812

172,216,349

392,827,043

'

19,913,473,024

'

'

'

'

'

'

'

'

'

Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures

'

'

'

'

16,512,267

102,309,641

46,175,921

107,040,625

44,799,315

76,755,257

7,688,628

26,823,590

61,275,006

101,632,762

145,725,482

65,808,893

169,621,585

76,279,457

265,545,968

110,788,637

23,940,627

132,195,560

45,648,034

40,669,472

6,744,190

47,163,238

109,368,373

30,028,036

18,279,517

37,911,481

44,243,636

42,370,308

40,236,708

26,956,348

66,267,830

61,480,537

25,620,270

35,951,221

280,124,512

32,699,875

306,767

37,962,958

58,030,415

18,991,491

274,001,770

3,896,196

8,794,276

35,112,663

1,893,072

125,796,550

261,911,730

16,375,465

138,692,170

65,726,701

16,261,453

14,264,726

85,259,583

32,147,686

12,038,802

44,804,247

25,195,151

24,455,856

88,838,140

48,354,084

52,674,719

34,181,059

118,226,254

56,812,067

65,586,116

137,166,447

36,810,961

14,743,808

4,587,417

29,247,648

56,388,377

40,865,081

25,274,913

57,261,029

110,579,721

88,687,241

74,565,227

41,501,837

50,050,545

29,748,293

34,830,535

87,050,589

17,866,839

10,535,741

105,330,512

51,619,667

66,810,070

25,091,442

29,962,393

19,273,441

19,866,560

22,342,997

68,592,791

94,338,175

7,728,021

44,638,205

42,133,173

173,040,707

26,008,829

17,185,896

44,248,628

230,712,410

26,629,110

11,707,100

5,633,504

21,766,529

20,020,708

29,063,188

48,536,648

42,153,706

95,028,635

48,564,237

100,000

20,752,360

86,760,958

102,848,186

41,382,939

71,853,904

103,228,846

47,700,367

72,195,016

46,325,308

50,730,369

88,506,364

128,312,362

316,308,569

84,015,832

171,323,384

31,530,434

15,538,411

35,772,483

16,957,168

18,219,504

47,088,746

60,502,676

62,354,798

180,002,876

32,108,158

48,386,974

30,071,097

30,718,344

21,110,430

20,927,750

44,171,806

51,236,834

51,199,414

122,151,743

31,509,250

21,331,256

19,457,630

32,377,132

23,306,798

34,077,357

6,385,897

148,124,807

63,358,181

53,219,652

83,319,520

218,108,921

52,714,201

73,254,190

37,666,568

40,054,983

21,907,966

102,015,760

107,833,507

7,316,293

151,393,402

76,585,726

21,585,486

32,773,909

137,765,752

43,513,276

83,154,517

97,401,626

50,226,656

52,296,558

49,891,137

38,388,960

28,510,216

112,024,057

81,370,764

128,537,532

44,308,246

23,817,812

7,105,946

33,458,522

21,539,788

18,429,210

46,012,691

101,568,710

31,245,979

53,375,152

17,399,184

50,101,390

49,574,181

120,793,983

58,619,115

221,673,564

95,378,971

28,926,270

12,053,370

14,202,415

20,836,187

35,501,039

141,195,609

33,420,065

25,940,382

15,088,620

57,780,897

54,884,628

47,372,794

21,989,647

12,251,689

10,200,909

29,842,170

47,568,396

36,942,737

82,449,274

38,373,529

20,428,176

56,096,309

200,357,764

33,449,524

149,554,364

24,252,859

18,200,000

29,784,036

260,646

16,803,357

18,524,760

23,396,930

49,379,541

58,878,697

31,004,234

248,305,767

39,693,774

1,503,896

71,091,504

200,754,219

339,636,058

290,920,607

77,521,614

31,382,317

204,923,730

91,554,340

149,787,638

25,488,243

50,568,115

87,120,723

87,213,946

60,494,947

66,963,081

36,724,374

51,182,963

12,086,254

27,040,764

153,181,258

164,253,471

18,719,000

102,259,524

55,129,941

126,904,453

91,994,531

5,324,167

5,690,677

8,887,673

8,896,639

14,834,819

4,828,100

15,750,506

14,522,661

34,834,670

70,675,977

39,118,706

4,992,655

26,594,320

137,194,184

97,861,963

680,439

17,386,901,834

324,262,637

99,918,120

89,304,331

237,672,997

97,243,894

30,249,704

55,513,215

35,536,928

21,494,767

86,374,021

90,196,941

10,909,329

28,514,514

32,706,070

115,190,070

17,421,323

155,344,169

20,704,283

72,740,141

47,364,632

56,525,932

159,574,427

50,595,134

33,240,786

216,942,644

14,392,180

23,525,801

26,117,622

43,994,735

102,067,305

135,979,620

85,297,738

35,157,890

77,484,644

142,631,971

19,298,210

34,610,887

47,783,539

146,047,192

61,394,396

111,868,036

52,396,039

34,478,777

144,890,617

32,945,466

92,214,992

44,685,462

64,919,228

32,515,071

26,744,951

43,518,098

37,807,068

198,069,317

17,300,926

45,566,042

41,866,523

47,444,688

35,485,701

101,058,416

32,109,231

114,309,716

55,381,887

60,813,633

21,165,038

70,125,984

73,755,422

70,710,561

50,178,876

59,886,638

44,706,600

59,899,400

63,460,489

100,670,048

126,401,526

17,579,471

87,878,165

92,039,183

23,104,536

23,348,787

66,947,221

42,410,212

91,348,351

82,990,613

86,015,187

53,695,593

16,668,620

10,652,262

285,934,273

124,781,541

38,568,542

27,464,586

259,814,554

24,036,456

44,814,483

37,852,346

32,553,167

65,884,527

92,772,487

97,763,174

10,716,463

113,391,538

121,450,165

199,819,447

51,285,666

55,291,622

46,044,508

55,104,166

85,643,404

145,471,882

109,806,924

156,730,525

29,517,673

8,397,867,526

14,140,112

172,522,801

96,771,730

18,803,763

39,144,770

20,481,641

24,316,438

5,000,000

16,609,469

47,445,363

17,745,635

53,301,940

47,028,898

573,312,560

21,369,486

30,572,881

44,091,632

23,231,928

35,313,269

23,569,103

30,203,240

26,708,058

13,214,722

22,375,812

172,216,349

442,866,480

'

26,800,948,400

'

'

'

'

'

'

'

'

'

Accumulated Depreciation

-4,807,709,000

-4,912,221,000

-4,539,583,000

-4,337,357,000

0

0

-11,445,278

-11,057,165

0

-6,257,548

0

0

-2,490,905

-5,494,624

-33,461,838

-9,519,405

-23,372,279

-13,659,850

-33,100,960

-28,276,895

-1,887,319

-16,931,741

0

-3,123,822

-3,841,681

-2,804,190

-6,685,386

-11,579,687

-7,595,468

-11,965,280

-4,986,340

-23,448,187

-20,581,844

-2,387,293

0

-19,343,578

-8,520,785

-10,003,163

-17,146,544

-10,029,556

0

-3,227,931

-2,840,690

0

-13,060,243

-1,738,035

-4,017,041

-12,928,298

0

-6,989,848

-23,147,254

-6,711,041

-7,705,656

-21,654,122

0

0

-24,644,073

-12,919,164

-4,327,441

-22,917,727

-6,566,783

-11,971,663

-7,919,119

-13,936,676

-13,512,371

-12,799,939

-6,736,216

-10,871,421

-3,700,423

-7,012,730

-11,172,993

-7,965,913

-2,124,869

-14,569,786

-3,080,440

-2,700,714

-14,038,267

-5,082,748

-6,337,254

-44,668,129

-4,686,215

-2,385,500

-12,392,429

-10,417,597

-3,889,921

-22,638,702

0

-4,655,719

-5,413,886

-18,748,222

-14,889,140

-13,330,823

-16,357,389

-9,870,573

-10,311,127

-10,599,550

-4,938,308

-20,664,462

-3,383,217

-11,821,792

-11,411,269

-10,178,767

-4,434,046

-11,895,336

-11,716,751

-53,500,328

-7,407,674

-6,263,951

-2,437,167

-9,457,763

-5,078,255

-7,214,459

-11,862,100

-4,101,964

-23,456,649

-15,065,373

0

-13,271,353

0

-5,491,559

-8,366,151

-18,372,874

-25,931,634

-11,826,369

-21,242,906

-14,087,855

-25,653,015

-4,729,574

-14,874,367

-131,267,364

-4,731,391

-14,625,920

-14,418,836

-4,098,923

-2,394,637

0

-7,779,026

-9,970,232

-3,080,868

-14,841,048

-10,741,983

-10,747,805

-15,031,335

-13,695,958

-9,644,381

-11,981,703

-11,943,140

-8,672,588

-1,901,519

-2,172,022

-8,733,929

-2,359,051

0

-8,131,799

-16,842,336

-11,043,147

0

-3,964,230

-36,189,802

-8,404,862

-7,133,172

-11,481,750

-31,853,462

-13,204,540

-3,914,535

-21,889,796

-14,820,148

-9,486,679

-12,457,511

-6,012,255

-3,280,138

-7,145,468

-16,371,788

-9,926,077

-11,529,488

-61,617,346

0

-24,599,996

-19,038,929

-16,970,116

-14,095,067

-13,530,181

-14,987,283

-16,670,485

-6,865,171

-6,551,308

-14,269,702

-2,592,517

-14,160,070

-1,193,952

-17,387,775

-2,513,872

0

-7,182,488

0

0

-9,881,175

-3,207,605

-18,480,854

0

-6,684,339

-3,089,614

-24,034,599

-8,357,613

-12,625,301

-5,182,720

-7,180,118

-9,832,847

-3,928,769

-7,664,303

-16,048,657

-14,670,174

-4,281,852

-6,186,384

-3,138,534

-15,725,082

-1,512,605

-6,175,785

-5,910,718

-9,008,244

-27,676,964

-8,564,889

-30,116,438

-13,059,276

-10,171,464

-6,410,921

-49,094,497

-14,258,820

-7,124,507

-9,441,621

0

-10,414,453

0

-7,782,721

-9,836,580

0

0

-3,920,806

-2,524,529

-39,901,393

-11,379,630

0

-10,475,335

-30,036,069

-59,965,660

-45,759,852

0

-7,993,609

-28,370,366

-4,774,971

-20,852,761

-15,391,905

-26,558,906

0

-5,921,143

-37,059,350

-7,696,848

-12,866,707

-2,762,709

-5,110,126

-12,645,731

-8,307,241

-33,407,167

0

-5,417,460

-3,504,357

-6,001,580

-4,346,093

-1,688,575

-1,714,567

-2,668,163

-2,674,400

-4,470,041

-1,547,728

-4,563,900

-6,122,453

-20,278,246

-16,723,548

-16,514,665

-2,242,801

-11,285,522

-18,860,924

-74,865,128

0

-3,177,396,618

-15,552,330

-18,835,680

-5,005,664

-17,490,985

-6,417,972

-12,478,794

-12,789,197

-5,125,356

-4,558,047

-29,612,754

-9,829,040

-2,421,777

-8,466,816

-6,504,421

-8,460,359

-3,775,179

-36,751,609

-4,544,908

-5,675,272

-2,310,263

-3,478,526

-8,175,241

-31,347,905

-21,171,170

-11,425,444

-5,903,575

-6,372,695

-1,246,430

-7,526,423

-13,768,517

-14,363,043

-4,962,013

-9,575,767

-4,430,068

-8,350,350

-9,313,767

-22,264,629

-8,503,934

-7,978,821

-18,061,981

-6,417,469

-25,583,560

-7,380,682

-7,612,197

-7,139,073

-4,245,768

-15,740,054

-5,955,017

-19,468,132

-6,240,631

-10,781,687

-8,710,641

-10,444,060

-5,337,998

-7,190,325

-11,499,213

-13,238,970

-11,871,567

-14,112,008

-4,053,076

-28,207,183

-12,253,028

-31,863,973

-4,042,522

-8,339,616

-23,694,689

-17,652,020

-6,097,337

-17,013,895

-18,654,006

-11,320,611

-15,794,393

-32,540,349

-16,582,733

-10,918,229

-24,819,377

-27,657,976

-1,450,445

-7,384,385

-20,344,998

-13,939,522

-23,271,791

-27,294,907

-26,089,157

-15,561,433

-3,061,770

-4,830,794

-14,976,876

-8,966,799

-14,937,859

-12,416,719

-13,042,186

-11,230,606

-12,690,883

-11,944,034

-17,328,409

-23,842,054

-20,981,272

-28,234,404

-2,276,033

-28,837,370

-35,022,638

-11,899,235

-15,459,664

-8,870,160

-10,004,367

-14,167,823

-13,517,115

-8,181,264

-5,718,712

-13,887,631

-10,546,255

-1,457,510,357

-9,199,580

0

0

-8,130,970

-14,454,678

0

-10,802,571

0

-4,616,186

0

-4,432,500

-3,355,103

-14,964,187

-69,955,775

-9,678,161

-11,655,149

-2,384,136

-12,232,711

-12,461,380

-9,071,317

-10,916,753

-9,848,801

-5,582,575

-5,932,912

-13,082,677

-102,846,572

0

-4,807,709,322

'

'

'

'

'

'

'

'

'

Investment in Real Estate Net

'

'

'

'

16,512,267

102,309,641

34,730,643

95,983,460

44,799,315

70,497,709

7,688,628

26,823,590

58,784,101

96,138,138

112,263,644

56,289,488

146,249,306

62,619,607

232,445,008

82,511,742

22,053,308

115,263,819

45,648,034

37,545,650

2,902,509

44,359,048

102,682,987

18,448,349

10,684,049

25,946,201

39,257,296

18,922,121

19,654,864

24,569,055

66,267,830

42,136,959

17,099,485

25,948,058

262,977,968

22,670,319

306,767

34,735,027

55,189,725

18,991,491

260,941,527

2,158,161

4,777,235

22,184,365

1,893,072

118,806,702

238,764,476

9,664,424

130,986,514

44,072,579

16,261,453

14,264,726

60,615,510

19,228,522

7,711,361

21,886,520

18,628,368

12,484,193

80,919,021

34,417,408

39,162,348

21,381,120

111,490,038

45,940,646

61,885,693

130,153,717

25,637,968

6,777,895

2,462,548

14,677,862

53,307,937

38,164,367

11,236,646

52,178,281

104,242,467

44,019,112

69,879,012

39,116,337

37,658,116

19,330,696

30,940,614

64,411,887

17,866,839

5,880,022

99,916,626

32,871,445

51,920,930

11,760,619

13,605,004

9,402,868

9,555,433

11,743,447

63,654,483

73,673,713

4,344,804

32,816,413

30,721,904

162,861,940

21,574,783

5,290,560

32,531,877

177,212,082

19,221,436

5,443,149

3,196,337

12,308,766

14,942,453

21,848,729

36,674,548

38,051,742

71,571,986

33,498,864

100,000

7,481,007

86,760,958

97,356,627

33,016,788

53,481,030

77,297,212

35,873,998

50,952,110

32,237,453

25,077,354

83,776,790

113,437,995

185,041,205

79,284,441

156,697,464

17,111,598

11,439,488

33,377,846

16,957,168

10,440,478

37,118,514

57,421,808

47,513,750

169,260,893

21,360,353

33,355,639

16,375,139

21,073,963

9,128,727

8,984,610

35,499,218

49,335,315

49,027,392

113,417,814

29,150,199

21,331,256

11,325,831

15,534,796

12,263,651

34,077,357

2,421,667

111,935,005

54,953,319

46,086,480

71,837,770

186,255,459

39,509,661

69,339,655

15,776,772

25,234,835

12,421,287

89,558,249

101,821,252

4,036,155

144,247,934

60,213,938

11,659,409

21,244,421

76,148,406

43,513,276

58,554,521

78,362,697

33,256,540

38,201,491

36,360,956

23,401,677

11,839,731

105,158,886

74,819,456

114,267,830

41,715,729

9,657,742

5,911,994

16,070,747

19,025,916

18,429,210

38,830,203

101,568,710

31,245,979

43,493,977

14,191,579

31,620,536

49,574,181

114,109,644

55,529,501

197,638,965

87,021,358

16,300,969

6,870,650

7,022,297

11,003,340

31,572,270

133,531,306

17,371,408

11,270,208

10,806,768

51,594,513

51,746,094

31,647,712

20,477,042

6,075,904

4,290,191

20,833,926

19,891,432

28,377,848

52,332,836

25,314,253

10,256,712

49,685,388

151,263,267

19,190,704

142,429,857

14,811,238

18,200,000

19,369,583

260,646

9,020,636

8,688,180

23,396,930

49,379,541

54,957,891

28,479,705

208,404,374

28,314,144

1,503,896

60,616,169

170,718,150

279,670,398

245,160,755

77,521,614

23,388,708

176,553,364

86,779,369

128,934,877

10,096,338

24,009,209

87,120,723

81,292,803

23,435,597

59,266,233

23,857,667

48,420,254

6,976,128

14,395,033

144,874,017

130,846,304

18,719,000

96,842,064

51,625,584

120,902,873

87,648,438

3,635,592

3,976,110

6,219,510

6,222,239

10,364,778

3,280,372

11,186,606

8,400,208

14,556,424

53,952,429

22,604,041

2,749,854

15,308,798

118,333,260

22,996,835

680,439

14,209,505,216

308,710,307

81,082,440

84,298,667

220,182,012

90,825,922

17,770,910

42,724,018

30,411,572

16,936,720

56,761,267

80,367,901

8,487,552

20,047,698

26,201,649

106,729,711

13,646,144

118,592,560

16,159,375

67,064,869

45,054,369

53,047,406

151,399,186

19,247,229

12,069,616

205,517,200

8,488,605

17,153,106

24,871,192

36,468,312

88,298,788

121,616,577

80,335,725

25,582,123

73,054,576

134,281,621

9,984,443

12,346,258

39,279,605

138,068,371

43,332,415

105,450,567

26,812,479

27,098,095

137,278,420

25,806,393

87,969,224

28,945,408

58,964,211

13,046,939

20,504,320

32,736,411

29,096,427

187,625,257

11,962,928

38,375,717

30,367,310

34,205,718

23,614,134

86,946,408

28,056,155

86,102,533

43,128,859

28,949,660

17,122,516

61,786,368

50,060,733

53,058,541

44,081,539

42,872,743

26,052,594

48,578,789

47,666,096

68,129,699

109,818,793

6,661,242

63,058,788

64,381,207

21,654,091

15,964,402

46,602,223

28,470,690

68,076,560

55,695,706

59,926,030

38,134,160

13,606,850

5,821,468

270,957,397

115,814,742

23,630,683

15,047,867

246,772,368

12,805,850

32,123,600

25,908,312

15,224,758

42,042,473

71,791,215

69,528,770

8,440,430

84,554,168

86,427,527

187,920,212

35,826,002

46,421,462

36,040,141

40,936,343

72,126,289

137,290,618

104,088,212

142,842,894

18,971,418

6,940,357,169

4,940,532

172,522,801

96,771,730

10,672,793

24,690,092

20,481,641

13,513,867

5,000,000

11,993,283

47,445,363

13,313,135

49,946,837

32,064,711

503,356,785

11,691,325

18,917,732

41,707,496

10,999,217

22,851,889

14,497,786

19,286,487

16,859,257

7,632,147

16,442,900

159,133,672

340,019,908

0

21,993,239,078

'

'

'

'

'

'

'

'

'

Real Estate And Accumulated Depreciation, Encumbrances Reference

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

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'

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'

'

'

'

'

'

' (L)

[1]

'

'

'

'

'

'

' (I)

[1]

' (J)

[1]

'

'

'

'

'

'

'

'

' (L)

[1]

' (L)

[1]

' (L)

[1]

'

' (J)

[1]

'

'

'

' (L)

[1]

'

'

'

' (L)

[1]

' (J)

[1]

' (L)

[1]

' (K)

[1]

' (J)

[1]

' (J)

[1]

'

'

' (I)

[1]

' (L)

[1]

'

'

' (L)

[1]

'

'

'

'

'

'

'

' (J)

[1]

' (K)

[1]

'

'

'

' (J)

[1]

'

'

'

'

' (J)

[1]

'

'

' (J)

[1]

'

' (M)

[1]

' (N)

[1]

'

' (J)

[1]

'

' (J)

[1]

' (I)

[1]

'

'

'

'

' (L)

[1]

' (I)

[1]

' (J)

[1]

' (J)

[1]

' (I)

[1]

'

'

'

'

'

' (L)

[1]

' (L)

[1]

'

'

' (L)

[1]

'

' (I)

[1]

'

'

'

'

'

'

'

'

' (K)

[1]

'

'

' (J)

[1]

'

'

' (K)

[1]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

' (K)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Encumbrances

'

'

'

'

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$103,482,569

$57,428,472

'

$101,492,308

$29,964,633

$2,135,579

$20,000,000

$20,122,719

$9,920,000

'

'

$3,200,000

$22,779,715

$18,169,458

$95,993,276

$8,585,000

$58,055,099

$8,290,000

$27,000,000

'

'

'

$31,680,000

'

$75,818,310

$9,270,000

$12,000,000

'

$22,016,556

$24,709,587

$43,026,348

'

'

'

'

'

'

$23,789,381

$58,822,321

'

'

$34,595,000

$16,215,000

'

$14,630,000

$99,939,735

$14,970,000

$31,789,016

$46,517,800

$28,180,585

$27,235,117

'

'

$8,020,000

$26,495,000

$25,175,000

'

$24,980,280

$47,439,130

$21,088,981

$60,073,423

'

$19,195,000

$22,843,410

'

$69,312,259

'

'

$39,539,109

'

$43,807,598

'

'

$64,865,644

$9,600,000

$38,268,889

$49,875,780

'

'

'

'

'

$84,778,876

$66,470,000

$29,160,000

$9,889,090

$927,712

'

'

$38,440,808

$30,889,928

'

$3,092,625

'

$13,886,034

$38,039,912

$35,000,000

$41,956,105

$71,243,194

$5,050,000

$77,353,222

$99,190,116

'

$30,372,953

$29,826,475

'

$33,000,000

$31,380,000

'

$46,390,558

$96,935,000

$17,858,854

$2,703,534,549

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$16,538,000

$28,200,000

'

$17,700,000

$36,455,000

$17,400,000

$28,870,000

$26,175,000

$9,829,000

$9,900,000

$143,605,310

$334,672,310

$2,135,958,561

$5,174,165,420

'

'

'

'

'

'

'

'

'

Property, Plant and Equipment, Estimated Useful Lives

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'30

'5

'15

'5

'10

'3

'7

Partially Owned Unconsolidated Properties

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

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'

'

'

'

'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

'

'

Number Of Unconsolidated Projects

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partially Owned Unconsolidated Units

1,669

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,669

'

'

'

'

'

'

'

'

Military Housing Properties

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Military Housing Units

5,113

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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[1]

(I)through (L)B See Encumbrances Reconciliation schedule.