$EQR
EQUITY RESIDENTIAL Stock $eqr

$eqr Overview Financials Valuation SEC Filings Company Website

2013 Q3 Form 10-Q Financial Statement

#000090610713000034 Filed on November 07, 2013

Income Statement

Concept	2013 Q3	2012 Q3
Revenue	$626.6M	$451.7M
YoY Change	38.73%	6.46%
Cost Of Revenue	$215.1M	$159.3M
YoY Change	35.03%	-11.1%
Gross Profit	$411.5M	$292.4M
YoY Change	40.73%	-7.06%
Gross Profit Margin	65.67%	64.73%
Selling, General & Admin	$14.40M	$10.10M
YoY Change	42.57%	0.0%
% of Gross Profit	3.5%	3.45%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$276.7M	$139.3M
YoY Change	98.59%	-12.75%
% of Gross Profit	67.24%	47.65%
Operating Expenses	$291.1M	$149.5M
YoY Change	94.72%	-12.01%
Operating Profit	$120.4M	$142.0M
YoY Change	-15.23%	17.1%
Interest Expense	-$123.4M	-$46.50M
YoY Change	165.38%	-58.41%
% of Operating Profit	-102.5%	-32.74%
Other Income/Expense, Net	-$4.400M	-$4.000M
YoY Change	10.0%	60.0%
Pretax Income	-$7.327M	$92.41M
YoY Change	-107.93%	202.97%
Income Tax	$492.0K	$222.0K
% Of Pretax Income		0.24%
Net Earnings	$377.2M	$226.1M
YoY Change	66.8%	109.68%
Net Earnings / Revenue	60.19%	50.06%
Basic Earnings Per Share	$1.05	$0.73
Diluted Earnings Per Share	$1.05	$0.72
COMMON SHARES
Basic Shares Outstanding	359.8M shares	301.3M shares
Diluted Shares Outstanding	359.8M shares	318.8M shares

Balance Sheet

Concept	2013 Q3	2012 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$973.0M	$46.00M
YoY Change	2015.22%	0.0%
Cash & Equivalents	$972.8M	$45.62M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$973.0M	$46.00M
YoY Change	2015.22%	0.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$22.09B	$16.27B
YoY Change	35.74%	7.52%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$166.0M	$18.00M
YoY Change	822.22%	63.64%
Other Assets	$207.0M	$170.0M
YoY Change	21.76%	-59.23%
Total Long-Term Assets	$22.84B	$16.62B
YoY Change	37.39%	5.8%
TOTAL ASSETS
Total Short-Term Assets	$973.0M	$46.00M
Total Long-Term Assets	$22.84B	$16.62B
Total Assets	$23.81B	$16.67B
YoY Change	42.85%	5.79%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$167.0M	$106.0M
YoY Change	57.55%	8.16%
Accrued Expenses	$85.00M	$79.00M
YoY Change	7.59%	12.86%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$473.0M	$362.0M
YoY Change	30.66%	7.42%
LONG-TERM LIABILITIES
Long-Term Debt	$11.71B	$9.309B
YoY Change	25.76%	6.06%
Other Long-Term Liabilities	$332.0M	$370.0M
YoY Change	-10.27%	-9.76%
Total Long-Term Liabilities	$12.04B	$9.679B
YoY Change	24.38%	5.36%
TOTAL LIABILITIES
Total Short-Term Liabilities	$473.0M	$362.0M
Total Long-Term Liabilities	$12.04B	$9.679B
Total Liabilities	$12.51B	$10.04B
YoY Change	24.62%	0.19%
SHAREHOLDERS EQUITY
Retained Earnings	$2.172B	$770.7M
YoY Change	181.77%
Common Stock	$3.604M	$3.027M
YoY Change	19.06%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$10.60B	$5.991B
YoY Change
Total Liabilities & Shareholders Equity	$23.81B	$16.67B
YoY Change	42.85%	5.79%

Cashflow Statement

Concept	2013 Q3	2012 Q3
OPERATING ACTIVITIES
Net Income	$377.2M	$226.1M
YoY Change	66.8%	109.68%
Depreciation, Depletion And Amortization	$276.7M	$139.3M
YoY Change	98.59%	-12.75%
Cash From Operating Activities	$349.3M	$277.2M
YoY Change	26.01%	25.09%
INVESTING ACTIVITIES
Capital Expenditures	-$142.6M	-$330.8M
YoY Change	-56.89%	42.89%
Acquisitions
YoY Change
Other Investing Activities	$762.9M	$343.0M
YoY Change	122.42%	75.36%
Cash From Investing Activities	$620.3M	$12.20M
YoY Change	4984.43%	-133.98%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-149.5M	-288.2M
YoY Change	-48.13%	-61.29%
NET CHANGE
Cash From Operating Activities	349.3M	277.2M
Cash From Investing Activities	620.3M	12.20M
Cash From Financing Activities	-149.5M	-288.2M
Net Change In Cash	820.1M	1.200M
YoY Change	68241.67%	-100.21%
FREE CASH FLOW
Cash From Operating Activities	$349.3M	$277.2M
Capital Expenditures	-$142.6M	-$330.8M
Free Cash Flow	$491.9M	$608.0M
YoY Change	-19.1%	34.19%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	10265000	USD
CY2012Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	74393000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	675000	USD
CY2012Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3320000	USD
CY2013Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4335000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2214000	USD
CY2013Q3	us-gaap	Assets Assets	23811431000	USD
CY2012Q4	us-gaap	Assets Assets	17201000000	USD
CY2013Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	92436000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-193148000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-169392000	USD
CY2013Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	8542822000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	6542355000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-37612000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-5795000	USD
	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	15683000	USD
	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	10506000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	15636000	USD
CY2013Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	412000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2214000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1675000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	1539000	USD
	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	1263000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	0	USD
	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	0	USD
CY2013Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.30
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.65
CY2012Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.66
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	5.76
CY2013Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.30
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.65
CY2012Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.66
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	5.74
CY2012Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	252169000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	254679000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	2156938000	USD
CY2013Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	488159000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1726304000	USD
CY2013Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	629446000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1854509000	USD
CY2012Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	596734000	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	95400000	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	200000	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	6900000	USD
CY2013Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	108000000	USD
CY2013Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	972761000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	612590000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	383921000	USD
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45623000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-338298000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	360171000	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.3375
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2013Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.0125
CY2013Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	325054654	shares
CY2013Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	360395959	shares
CY2013Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	360395959	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	325054654	shares
CY2013Q3	us-gaap	Common Stock Value CommonStockValue	3604000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	3251000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	374644000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	473666000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1743393000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	226460000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	14525000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	10184000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	22103000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	69846000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1813239000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	389169000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	495769000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	236644000	USD
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	333202000	USD
	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	254009000	USD
CY2013Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	119632000	USD
CY2012Q3	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	86682000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	934316000	USD
CY2012Q3	us-gaap	Costs And Expenses CostsAndExpenses	308767000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1465252000	USD
CY2013Q3	us-gaap	Costs And Expenses CostsAndExpenses	508052000	USD
	us-gaap	Debt Instrument Interest Rate Effective Percentage Rate Range Maximum DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum	0.03998
CY2013Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.0588
	us-gaap	Debt Instrument Interest Rate Stated Percentage Rate Range Maximum DebtInstrumentInterestRateStatedPercentageRateRangeMaximum	0.0725
	us-gaap	Debt Instrument Interest Rate Stated Percentage Rate Range Minimum DebtInstrumentInterestRateStatedPercentageRateRangeMinimum	0.0005
	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2014-09-01
CY2013Q4	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2014-11-01
	us-gaap	Debt Instrument Maturity Date Range End1 DebtInstrumentMaturityDateRangeEnd1	2026-12-31
CY2013Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	66775000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	44382000	USD
	us-gaap	Depreciation Depreciation	798121000	USD
CY2013Q3	us-gaap	Depreciation Depreciation	277336000	USD
	us-gaap	Depreciation Depreciation	422148000	USD
CY2012Q3	us-gaap	Depreciation Depreciation	139337000	USD
CY2013Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	12132000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1524000	USD
CY2013Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	3456000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	44050000	USD
	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	0	USD
	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	0	USD
	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	-12337000	USD
	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	8737000	USD
	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	-10907000	USD
	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	-16084000	USD
CY2012Q4	us-gaap	Development In Process DevelopmentInProcess	387750000	USD
CY2013Q3	us-gaap	Development In Process DevelopmentInProcess	779053000	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	1990577000	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	307447000	USD
CY2013Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	401703000	USD
CY2012Q3	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	103394000	USD
CY2013Q3	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	40000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	503000	USD
CY2012Q3	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	1000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-23000	USD
	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	3357000	USD
	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	1276000	USD
CY2012Q3	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	995000	USD
CY2013Q3	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	18000	USD
	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	75812000	USD
	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	204171000	USD
CY2013Q3	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	5944000	USD
CY2012Q3	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	66699000	USD
	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	130797000	USD
CY2012Q3	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	41760000	USD
CY2013Q3	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	2474000	USD
	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	35174000	USD
CY2012Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment Net DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNet	1964677220	USD
CY2013Q3	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	8418000	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	110986000	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	334968000	USD
CY2012Q3	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	108459000	USD
CY2013Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	149836000	USD
CY2012Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	260176000	USD
CY2013Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	1037000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3109000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	9319000	USD
CY2012Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2386000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.534
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.871
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.045
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.725
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.045
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.871
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.519
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.719
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1519000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	454000	USD
CY2013Q3	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.20
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	232439000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	503159000	USD
CY2013Q3	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	1196410000	USD
CY2012Q4	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	1343765000	USD
CY2013Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-830000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
CY2012Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-830000	USD
CY2013Q4	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-1300000	USD
CY2012Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	10083000	USD
CY2013Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14438000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	47018000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	37162000	USD
	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	2128000	USD
CY2012Q3	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	3895000	USD
	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	-9402000	USD
CY2013Q3	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	-483000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-12710000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	45049000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-227020000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	81062000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	62708000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-6328000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-187518000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	92406000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-12467000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	62103000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	92181000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-234414000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.269
CY2013Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.035
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.150
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.644
CY2013Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.035
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.644
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.149
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.267
CY2013Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	404184000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	434702000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2023897000	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	144142000	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	137541000	USD
CY2013Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	388865000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	415184000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1943548000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	1.384
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	5.515
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.456
CY2013Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	1.080
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.452
CY2013Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.080
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	5.515
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.370
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2984000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-3000	USD
CY2013Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1454000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1326000	USD
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	493000	USD
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	222000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	602000	USD
CY2012Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-3000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1064000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	573000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	67479000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	65001000	USD
	us-gaap	Increase Decrease In Fair Value Of Hedged Item In Interest Rate Fair Value Hedge1 IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1	5934000	USD
	us-gaap	Increase Decrease In Fair Value Of Hedged Item In Interest Rate Fair Value Hedge1 IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1	1524000	USD
	us-gaap	Increase Decrease In Fair Value Of Interest Rate Fair Value Hedging Instruments1 IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1	-5934000	USD
	us-gaap	Increase Decrease In Fair Value Of Interest Rate Fair Value Hedging Instruments1 IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1	-1524000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-2175000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-9252000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7315000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-14039000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-5427000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	68492000	USD
	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	-2250000	USD
	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	4152000	USD
	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	3472000	USD
	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	-6475000	USD
CY2012	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	0	USD
	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	830000	USD
CY2012Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	70087000	USD
CY2013Q3	us-gaap	Interest And Other Income InterestAndOtherIncome	816000	USD
	us-gaap	Interest And Other Income InterestAndOtherIncome	1320000	USD
	us-gaap	Interest And Other Income InterestAndOtherIncome	70514000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	-32946000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	-15776000	USD
	us-gaap	Interest Expense InterestExpense	700000	USD
CY2013Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	120035000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	437452000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	345476000	USD
CY2012Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	113222000	USD
	us-gaap	Interest Paid Net InterestPaidNet	353329000	USD
	us-gaap	Interest Paid Net InterestPaidNet	451495000	USD
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	76223000	USD
CY2013Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	85353000	USD
CY2013Q3	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	21700000	USD
CY2013Q3	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	17555388000	USD
CY2012Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	14135740000	USD
CY2013Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	165898000	USD
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	17877000	USD
CY2013Q3	us-gaap	Land Land	6201333000	USD
CY2012Q4	us-gaap	Land Land	4554912000	USD
CY2012Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	353823000	USD
CY2013Q3	us-gaap	Land Available For Development LandAvailableForDevelopment	505494000	USD
CY2013Q3	us-gaap	Liabilities Liabilities	12512584000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	9275521000	USD
CY2013Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	23811431000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	17201000000	USD
CY2013Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	82085000	USD
CY2012Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	114705000	USD
CY2013Q3	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2012Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
	us-gaap	Loans Assumed1 LoansAssumed1	137644000	USD
	us-gaap	Loans Assumed1 LoansAssumed1	0	USD
CY2012Q3	us-gaap	Management Fees Revenue ManagementFeesRevenue	3052000	USD
	us-gaap	Management Fees Revenue ManagementFeesRevenue	7328000	USD
CY2013Q3	us-gaap	Management Fees Revenue ManagementFeesRevenue	2566000	USD
	us-gaap	Management Fees Revenue ManagementFeesRevenue	7399000	USD
CY2013Q3	us-gaap	Minority Interest MinorityInterest	324153000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	237294000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-69344000	USD
CY2012Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	159606000	USD
CY2013Q3	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	213518000	USD
CY2013Q3	us-gaap	Minority Interest Ownership Percentage By Parent MinorityInterestOwnershipPercentageByParent	0.962
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-819539000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-464760000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-380625000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	57838000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	861866000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	767093000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	377192000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1719637000	USD
	us-gaap	Net Income Loss NetIncomeLoss	474702000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	226139000	USD
CY2013Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14836000	USD
CY2012Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10496000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	70947000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	21646000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	218603000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	460233000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1716528000	USD
CY2013Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	376155000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	481879000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	229099000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1716528000	USD
CY2013Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	376155000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	34100000	USD
	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	3969000	USD
	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	6141000	USD
CY2012Q4	us-gaap	Notes Payable NotesPayable	4630875000	USD
CY2013Q3	us-gaap	Notes Payable NotesPayable	5476522000	USD
CY2013Q3	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	389
CY2013Q3	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	12
CY2013Q3	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	109795
	us-gaap	Operating Income Loss OperatingIncomeLoss	368443000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	142932000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	121394000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	291521000	USD
CY2012Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	448647000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	1749374000	USD
CY2013Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	626880000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	1295431000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	170372000	USD
CY2013Q3	us-gaap	Other Assets OtherAssets	379979000	USD
CY2013Q3	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	1675000	USD
CY2012Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	2214000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-789000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	0	USD
CY2013Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-1730000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	321000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1036000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2548000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	23756000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-3704000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-3986000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-10907000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-16084000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-12337000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-3695000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-3600000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	8737000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	394000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	312000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-374000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	5423000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	59363000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	96866000	USD
	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	108308000	USD
	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	764859000	USD
	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	116715000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	554000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	304518000	USD
CY2013Q3	us-gaap	Other Liabilities OtherLiabilities	331797000	USD
CY2013Q3	us-gaap	Other Liabilities Fair Value Disclosure OtherLiabilitiesFairValueDisclosure	78629000	USD
CY2012Q4	us-gaap	Other Liabilities Fair Value Disclosure OtherLiabilitiesFairValueDisclosure	70655000	USD
CY2012Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	3984000	USD
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	18587000	USD
CY2013Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	3986000	USD
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	7530000	USD
	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	63395000	USD
	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	62769000	USD
CY2013Q3	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	18875000	USD
CY2012Q3	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	18493000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	96866000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	114535000	USD
	us-gaap	Payments For Proceeds From Deposits On Real Estate Acquisitions PaymentsForProceedsFromDepositsOnRealEstateAcquisitions	-147890000	USD
	us-gaap	Payments For Proceeds From Deposits On Real Estate Acquisitions PaymentsForProceedsFromDepositsOnRealEstateAcquisitions	-31677000	USD
	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	44013000	USD
	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	0	USD
	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	44700000	USD
	us-gaap	Payments For Proceeds From Mortgage Deposits PaymentsForProceedsFromMortgageDeposits	0	USD
	us-gaap	Payments For Proceeds From Mortgage Deposits PaymentsForProceedsFromMortgageDeposits	-2370000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	371319000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	537464000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	22216000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17053000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	11344000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3109000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	18254000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4599000	USD
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	2860000	USD
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	954000	USD
	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	87000	USD
	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	0	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	4000875000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	256965000	USD
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2013Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2013Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	1000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	1000000	shares
CY2013Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	1000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	1000000	shares
CY2012Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	50000000	USD
CY2013Q3	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	50000000	USD
	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	495600000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	220753000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	5951000	USD
CY2013Q4	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	896900000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	500000000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	11520000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	5992000	USD
	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	1245550000	USD
	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	0	USD
	us-gaap	Proceeds From Partnership Contribution ProceedsFromPartnershipContribution	5000	USD
	us-gaap	Proceeds From Partnership Contribution ProceedsFromPartnershipContribution	5000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-33000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-33000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	828000	USD
CY2013Q4	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	300000	USD
CY2013Q4	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	-1700000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	610127000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	4434708000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	46781000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16044000	USD
CY2013Q3	us-gaap	Profit Loss ProfitLoss	391717000	USD
	us-gaap	Profit Loss ProfitLoss	496805000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	236323000	USD
	us-gaap	Profit Loss ProfitLoss	1789483000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	15711944000	USD
CY2013Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	19254957000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	4912221000	USD
CY2013Q3	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	4654594000	USD
CY2012Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	21008429000	USD
CY2013Q3	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	26740837000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	16096208000	USD
CY2013Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	22086243000	USD
CY2012Q3	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	53064000	USD
	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	218777000	USD
	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	154633000	USD
CY2013Q3	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	76255000	USD
CY2012Q3	us-gaap	Redemption Premium RedemptionPremium	5150000	USD
	us-gaap	Redemption Premium RedemptionPremium	5150000	USD
CY2013Q3	us-gaap	Redemption Premium RedemptionPremium	0	USD
	us-gaap	Redemption Premium RedemptionPremium	0	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	385000000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	8413000000	USD
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	400000000	USD
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	253858000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	250442000	USD
CY2013Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	98874000	USD
CY2013Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2171603000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	887355000	USD
	us-gaap	Revenues Revenues	1756773000	USD
	us-gaap	Revenues Revenues	1302759000	USD
CY2012Q3	us-gaap	Revenues Revenues	451699000	USD
CY2013Q3	us-gaap	Revenues Revenues	629446000	USD
	us-gaap	Service Management Costs ServiceManagementCosts	3595000	USD
CY2013Q3	us-gaap	Secured Debt SecuredDebt	6230675000	USD
CY2012Q4	us-gaap	Secured Debt SecuredDebt	3898369000	USD
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	66988000	USD
CY2013Q3	us-gaap	Security Deposit Liability SecurityDepositLiability	71462000	USD
	eqr	Acquisition Of Archstone Deferred Financing Costs AcquisitionOfArchstoneDeferredFinancingCosts	0	USD
	eqr	Acquisition Of Archstone Investment In Real Estate Net AcquisitionOfArchstoneInvestmentInRealEstateNet	0	USD
	us-gaap	Service Management Costs ServiceManagementCosts	4739000	USD
CY2012Q3	us-gaap	Service Management Costs ServiceManagementCosts	1108000	USD
CY2013Q3	us-gaap	Service Management Costs ServiceManagementCosts	1516000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	29019000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	20836000	USD
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	47939	shares
	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	63788	shares
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	34468085	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	530847	shares
CY2013Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	13000000	shares
	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	464600000	USD
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	0	shares
CY2013Q3	us-gaap	Stockholders Equity StockholdersEquity	10598637000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	7289813000	USD
CY2013Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10922790000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7527107000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	32000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-1000	USD
	us-gaap	Unrealized Gain Loss On Interest Rate Cash Flow Hedges Pretax Accumulated Other Comprehensive Income Loss UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss	169866106	USD
CY2012	us-gaap	Unrealized Gain Loss On Interest Rate Cash Flow Hedges Pretax Accumulated Other Comprehensive Income Loss UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss	194700000	USD
CY2013Q3	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	5000000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	352414000	shares
CY2013Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	359811000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	317265000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	318773000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	300116000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	301336000	shares
CY2013Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	359811000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	352414000	shares
	eqr	Ability To Increase Line Of Credit AbilityToIncreaseLineOfCredit	500000000	USD
CY2012Q4	eqr	Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrentOtherThanInterestAndDividendPayable	38372000	USD
CY2013Q3	eqr	Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrentOtherThanInterestAndDividendPayable	166939000	USD
	eqr	Acquisition Of Archstone Accounts Payable And Accrued Liabilities AcquisitionOfArchstoneAccountsPayableAndAccruedLiabilities	0	USD
	eqr	Acquisition Of Archstone Accounts Payable And Accrued Liabilities AcquisitionOfArchstoneAccountsPayableAndAccruedLiabilities	17576000	USD
	eqr	Acquisition Of Archstone Common Shares Issued AcquisitionOfArchstoneCommonSharesIssued	0	USD
	eqr	Acquisition Of Archstone Common Shares Issued AcquisitionOfArchstoneCommonSharesIssued	1929868000	USD
	eqr	Acquisition Of Archstone Deferred Financing Costs AcquisitionOfArchstoneDeferredFinancingCosts	-25780000	USD
	eqr	Acquisition Of Archstone Deposits Restricted AcquisitionOfArchstoneDepositsRestricted	-474000	USD
	eqr	Acquisition Of Archstone Deposits Restricted AcquisitionOfArchstoneDepositsRestricted	0	USD
	eqr	Acquisition Of Archstone Escrow Deposits Mortgage AcquisitionOfArchstoneEscrowDepositsMortgage	-35897000	USD
	eqr	Acquisition Of Archstone Escrow Deposits Mortgage AcquisitionOfArchstoneEscrowDepositsMortgage	0	USD
	eqr	Acquisition Of Archstone Investment In Real Estate Net AcquisitionOfArchstoneInvestmentInRealEstateNet	-8710242000	USD
	eqr	Acquisition Of Archstone Investments In Unconsolidated Entities AcquisitionOfArchstoneInvestmentsInUnconsolidatedEntities	-217092000	USD
	eqr	Acquisition Of Archstone Investments In Unconsolidated Entities AcquisitionOfArchstoneInvestmentsInUnconsolidatedEntities	0	USD
	eqr	Acquisition Of Archstone Mortgage Notes Payable AcquisitionOfArchstoneMortgageNotesPayable	0	USD
	eqr	Acquisition Of Archstone Mortgage Notes Payable AcquisitionOfArchstoneMortgageNotesPayable	3076876000	USD
	eqr	Acquisition Of Archstone Noncontrolling Interests Partially Owned Properties AcquisitionOfArchstoneNoncontrollingInterestsPartiallyOwnedProperties	0	USD
	eqr	Acquisition Of Archstone Noncontrolling Interests Partially Owned Properties AcquisitionOfArchstoneNoncontrollingInterestsPartiallyOwnedProperties	28263000	USD
	eqr	Acquisition Of Archstone Other Assets AcquisitionOfArchstoneOtherAssets	-203295000	USD
	eqr	Acquisition Of Archstone Other Assets AcquisitionOfArchstoneOtherAssets	0	USD
	eqr	Acquisition Of Archstone Other Liabilities AcquisitionOfArchstoneOtherLiabilities	117068000	USD
	eqr	Acquisition Of Archstone Other Liabilities AcquisitionOfArchstoneOtherLiabilities	0	USD
	eqr	Acquisition Of Archstone Security Deposits AcquisitionOfArchstoneSecurityDeposits	0	USD
	eqr	Acquisition Of Archstone Security Deposits AcquisitionOfArchstoneSecurityDeposits	10949000	USD
	eqr	Acqusition Of Archstone Interest Payable AcqusitionOfArchstoneInterestPayable	0	USD
	eqr	Acqusition Of Archstone Interest Payable AcqusitionOfArchstoneInterestPayable	11305000	USD
CY2013Q3	eqr	Additional Common Shares Authorized AdditionalCommonSharesAuthorized	13000000	shares
	eqr	Adjustment Depreciation AdjustmentDepreciation	516940000	USD
	eqr	Adjustment Depreciation AdjustmentDepreciation	830097000	USD
	eqr	Allocation Of Net Income Loss To Noncontrolling Interests Partially Owned Properties AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties	457000	USD
	eqr	Allocation Of Net Income Loss To Noncontrolling Interests Partially Owned Properties AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties	-1101000	USD
CY2012Q3	eqr	Allocation Of Net Income Loss To Noncontrolling Interests Partially Owned Properties AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties	-312000	USD
CY2013Q3	eqr	Allocation Of Net Income Loss To Noncontrolling Interests Partially Owned Properties AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties	-311000	USD
	eqr	Amortization Of Deferred Financing Costs AmortizationOfDeferredFinancingCosts	10384000	USD
	eqr	Amortization Of Deferred Financing Costs AmortizationOfDeferredFinancingCosts	15864000	USD
	eqr	Amortization Of Deferred Financing Costs Deferred Financing Costs Net AmortizationOfDeferredFinancingCostsDeferredFinancingCostsNet	16016000	USD
	eqr	Amortization Of Deferred Financing Costs Deferred Financing Costs Net AmortizationOfDeferredFinancingCostsDeferredFinancingCostsNet	10384000	USD
	eqr	Amortization Of Deferred Financing Costs Investment In Real Estate Net AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet	-152000	USD
	eqr	Amortization Of Deferred Financing Costs Investment In Real Estate Net AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet	0	USD
	eqr	Amortization Of Deferred Settlements On Derivative Instruments Other Liabilities AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities	-401000	USD
	eqr	Amortization Of Deferred Settlements On Derivative Instruments Other Liabilities AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities	-401000	USD
	eqr	Amortization Of Discounts And Premiums On Debt Mortgage Notes Payable AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable	-7462000	USD
	eqr	Amortization Of Discounts And Premiums On Debt Mortgage Notes Payable AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable	-39232000	USD
	eqr	Amortization Of Discounts And Premiums On Debt Notes Net AmortizationOfDiscountsAndPremiumsOnDebtNotesNet	1620000	USD
	eqr	Amortization Of Discounts And Premiums On Debt Notes Net AmortizationOfDiscountsAndPremiumsOnDebtNotesNet	1667000	USD
CY2013Q3	eqr	Amortization Of Intangible Liabilities AmortizationOfIntangibleLiabilities	-993000	USD
CY2012Q3	eqr	Break Up Fee BreakUpFee	70000000	USD
CY2012Q4	eqr	Break Up Fee BreakUpFee	80000000	USD
CY2012	eqr	Break Up Fee BreakUpFee	150000000	USD
CY2012Q4	eqr	Bridge Loan Principal Amount BridgeLoanPrincipalAmount	2500000000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Depreciation DisposalGroupIncludingDiscontinuedOperationDepreciation	29497000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Depreciation DisposalGroupIncludingDiscontinuedOperationDepreciation	2273000	USD
CY2012Q3	eqr	Business Acquisition Proforma Income Loss From Continuing Operations BusinessAcquisitionProformaIncomeLossFromContinuingOperations	107024000	USD
CY2013Q3	eqr	Business Acquisition Proforma Income Loss From Continuing Operations BusinessAcquisitionProformaIncomeLossFromContinuingOperations	84978000	USD
	eqr	Business Acquisition Proforma Income Loss From Continuing Operations BusinessAcquisitionProformaIncomeLossFromContinuingOperations	-179574000	USD
	eqr	Business Acquisition Proforma Income Loss From Continuing Operations BusinessAcquisitionProformaIncomeLossFromContinuingOperations	132592000	USD
	eqr	Business Acquisition Proforma Income Loss From Discontinued Operations Net Of Tax BusinessAcquisitionProformaIncomeLossFromDiscontinuedOperationsNetOfTax	2024346000	USD
CY2012Q3	eqr	Business Acquisition Proforma Income Loss From Discontinued Operations Net Of Tax BusinessAcquisitionProformaIncomeLossFromDiscontinuedOperationsNetOfTax	145145000	USD
CY2013Q3	eqr	Business Acquisition Proforma Income Loss From Discontinued Operations Net Of Tax BusinessAcquisitionProformaIncomeLossFromDiscontinuedOperationsNetOfTax	403181000	USD
	eqr	Business Acquisition Proforma Income Loss From Discontinued Operations Net Of Tax BusinessAcquisitionProformaIncomeLossFromDiscontinuedOperationsNetOfTax	434253000	USD
CY2013Q3	eqr	Business Acquisition Proforma Net Income Available To Common Shares BusinessAcquisitionProformaNetIncomeAvailableToCommonShares	468959000	USD
	eqr	Business Acquisition Proforma Net Income Available To Common Shares BusinessAcquisitionProformaNetIncomeAvailableToCommonShares	2070153000	USD
	eqr	Business Acquisition Proforma Net Income Available To Common Shares BusinessAcquisitionProformaNetIncomeAvailableToCommonShares	232053000	USD
CY2012Q3	eqr	Business Acquisition Proforma Net Income Available To Common Shares BusinessAcquisitionProformaNetIncomeAvailableToCommonShares	234471000	USD
CY2013Q3	eqr	Business Acquisition Proforma Weighted Average Common Shares Basic BusinessAcquisitionProformaWeightedAverageCommonSharesBasic	359811000	shares
CY2012Q3	eqr	Business Acquisition Proforma Weighted Average Common Shares Basic BusinessAcquisitionProformaWeightedAverageCommonSharesBasic	357654000	shares
	eqr	Business Acquisition Proforma Weighted Average Common Shares Basic BusinessAcquisitionProformaWeightedAverageCommonSharesBasic	356434000	shares
	eqr	Business Acquisition Proforma Weighted Average Common Shares Basic BusinessAcquisitionProformaWeightedAverageCommonSharesBasic	359611000	shares
CY2013Q3	eqr	Business Acquisition Proforma Weighted Average Number Of Shares Diluted BusinessAcquisitionProformaWeightedAverageNumberOfSharesDiluted	375883000	shares
	eqr	Business Acquisition Proforma Weighted Average Number Of Shares Diluted BusinessAcquisitionProformaWeightedAverageNumberOfSharesDiluted	375808000	shares
	eqr	Business Acquisition Proforma Weighted Average Number Of Shares Diluted BusinessAcquisitionProformaWeightedAverageNumberOfSharesDiluted	356434000	shares
CY2012Q3	eqr	Business Acquisition Proforma Weighted Average Number Of Shares Diluted BusinessAcquisitionProformaWeightedAverageNumberOfSharesDiluted	375091000	shares
	eqr	Charges Hedge Termination Activities ChargesHedgeTerminationActivities	44000000	USD
CY2013Q3	eqr	Common Shares Added To Atm Program CommonSharesAddedToAtmProgram	5687478	shares
CY2013Q3	eqr	Common Shares And Units Outstanding CommonSharesAndUnitsOutstanding	374596335	shares
CY2013Q3	eqr	Common Stock Capital Shares Reserved For Future Issuance Under Share Offering Program CommonStockCapitalSharesReservedForFutureIssuanceUnderShareOfferingProgram	17000000	shares
CY2013Q3	eqr	Consolidated Project Under Development Commitment Fund ConsolidatedProjectUnderDevelopmentCommitmentFund	608741000	USD
CY2012Q3	eqr	Dilutive Op Units DilutiveOpUnits	14177000	shares
	eqr	Dilutive Op Units DilutiveOpUnits	13816000	shares
	eqr	Dilutive Securities Options DilutiveSecuritiesOptions	3333000	shares
CY2012Q3	eqr	Dilutive Securities Options DilutiveSecuritiesOptions	3260000	shares
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs DisposalGroupIncludingDiscontinuedOperationAmortizationOfDeferredFinancingCosts	27000	USD
	eqr	Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs DisposalGroupIncludingDiscontinuedOperationAmortizationOfDeferredFinancingCosts	119000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs DisposalGroupIncludingDiscontinuedOperationAmortizationOfDeferredFinancingCosts	0	USD
	eqr	Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs DisposalGroupIncludingDiscontinuedOperationAmortizationOfDeferredFinancingCosts	228000	USD
	eqr	Disposal Group Including Discontinued Operation Depreciation DisposalGroupIncludingDiscontinuedOperationDepreciation	31976000	USD
	eqr	Disposal Group Including Discontinued Operation Depreciation DisposalGroupIncludingDiscontinuedOperationDepreciation	94792000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation General And Administrative DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrative	3000	USD
	eqr	Disposal Group Including Discontinued Operation General And Administrative DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrative	76000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation General And Administrative DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrative	44000	USD
	eqr	Disposal Group Including Discontinued Operation General And Administrative DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrative	87000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Interest And Other Income DisposalGroupIncludingDiscontinuedOperationInterestAndOtherIncome	34000	USD
	eqr	Disposal Group Including Discontinued Operation Interest And Other Income DisposalGroupIncludingDiscontinuedOperationInterestAndOtherIncome	156000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Interest And Other Income DisposalGroupIncludingDiscontinuedOperationInterestAndOtherIncome	65000	USD
	eqr	Disposal Group Including Discontinued Operation Interest And Other Income DisposalGroupIncludingDiscontinuedOperationInterestAndOtherIncome	81000	USD
CY2012Q4	eqr	Disposal Group Including Discontinued Operation Mortgage Notes Payable DisposalGroupIncludingDiscontinuedOperationMortgageNotesPayable	34386391	USD
	eqr	Disposal Group Including Discontinued Operation Other Expenses DisposalGroupIncludingDiscontinuedOperationOtherExpenses	3000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Other Expenses DisposalGroupIncludingDiscontinuedOperationOtherExpenses	0	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Other Expenses DisposalGroupIncludingDiscontinuedOperationOtherExpenses	23000	USD
	eqr	Disposal Group Including Discontinued Operation Other Expenses DisposalGroupIncludingDiscontinuedOperationOtherExpenses	170000	USD
	eqr	Disposal Group Including Discontinued Operation Property And Maintenance DisposalGroupIncludingDiscontinuedOperationPropertyAndMaintenance	79482000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Property And Maintenance DisposalGroupIncludingDiscontinuedOperationPropertyAndMaintenance	25608000	USD
	eqr	Disposal Group Including Discontinued Operation Property And Maintenance DisposalGroupIncludingDiscontinuedOperationPropertyAndMaintenance	33181000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Property And Maintenance DisposalGroupIncludingDiscontinuedOperationPropertyAndMaintenance	3272000	USD
	eqr	Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance DisposalGroupIncludingDiscontinuedOperationRealEstateTaxesAndInsurance	10578000	USD
	eqr	Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance DisposalGroupIncludingDiscontinuedOperationRealEstateTaxesAndInsurance	29599000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance DisposalGroupIncludingDiscontinuedOperationRealEstateTaxesAndInsurance	11480000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance DisposalGroupIncludingDiscontinuedOperationRealEstateTaxesAndInsurance	396000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operation Rental Revenue DisposalGroupIncludingDiscontinuedOperationRentalRevenue	8418000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operation Rental Revenue DisposalGroupIncludingDiscontinuedOperationRentalRevenue	108459000	USD
	eqr	Disposal Group Including Discontinued Operation Rental Revenue DisposalGroupIncludingDiscontinuedOperationRentalRevenue	110986000	USD
	eqr	Disposal Group Including Discontinued Operation Rental Revenue DisposalGroupIncludingDiscontinuedOperationRentalRevenue	334968000	USD
CY2012Q3	eqr	Disposal Group Including Discontinued Operations Property Management DisposalGroupIncludingDiscontinuedOperationsPropertyManagement	70000	USD
CY2013Q3	eqr	Disposal Group Including Discontinued Operations Property Management DisposalGroupIncludingDiscontinuedOperationsPropertyManagement	0	USD
	eqr	Disposal Group Including Discontinued Operations Property Management DisposalGroupIncludingDiscontinuedOperationsPropertyManagement	211000	USD
	eqr	Disposal Group Including Discontinued Operations Property Management DisposalGroupIncludingDiscontinuedOperationsPropertyManagement	1000	USD
	eqr	Disposed Properties DisposedProperties	92
	eqr	Disposed Units DisposedUnits	28328
	eqr	Distributions Minority Interests Partially Owned Properties DistributionsMinorityInterestsPartiallyOwnedProperties	5702000	USD
	eqr	Distributions Minority Interests Partially Owned Properties DistributionsMinorityInterestsPartiallyOwnedProperties	4742000	USD
CY2013Q3	eqr	Earnest Money On Acquisitions EarnestMoneyOnAcquisitions	350000	USD
CY2012Q4	eqr	Earnest Money On Acquisitions EarnestMoneyOnAcquisitions	5613000	USD
CY2012Q4	eqr	Escrow Deposits For Mortgage And Replacement Reserves EscrowDepositsForMortgageAndReplacementReserves	9129000	USD
CY2013Q3	eqr	Escrow Deposits For Mortgage And Replacement Reserves EscrowDepositsForMortgageAndReplacementReserves	40901000	USD
CY2013Q3	eqr	Fair Value Of Serp Investments FairValueOfSerpInvestments	78629000	USD
CY2012Q4	eqr	Fair Value Of Serp Investments FairValueOfSerpInvestments	70655000	USD
	eqr	Gain Loss On Sale Of Land Parcels GainLossOnSaleOfLandParcels	0	USD
CY2012Q3	eqr	Gain Loss On Sale Of Land Parcels GainLossOnSaleOfLandParcels	0	USD
CY2013Q3	eqr	Gain Loss On Sale Of Land Parcels GainLossOnSaleOfLandParcels	-2437000	USD
	eqr	Gain Loss On Sale Of Land Parcels GainLossOnSaleOfLandParcels	12179000	USD
	eqr	Gain Loss On Sales Of Land Parcels GainLossOnSalesOfLandParcels	12179000	USD
	eqr	Gain Loss On Sales Of Land Parcels GainLossOnSalesOfLandParcels	0	USD
	eqr	Gain Losson Salesof Unconsolidated Entities GainLossonSalesofUnconsolidatedEntities	0	USD
CY2013Q3	eqr	Gain Losson Salesof Unconsolidated Entities GainLossonSalesofUnconsolidatedEntities	16000	USD
CY2012Q3	eqr	Gain Losson Salesof Unconsolidated Entities GainLossonSalesofUnconsolidatedEntities	0	USD
	eqr	Gain Losson Salesof Unconsolidated Entities GainLossonSalesofUnconsolidatedEntities	16000	USD
	eqr	Ground Lease Amortization GroundLeaseAmortization	2500000	USD
CY2013Q3	eqr	Ground Lease Amortization GroundLeaseAmortization	1100000	USD
CY2013Q3	eqr	Ground Lease Intangibles Above Market GroundLeaseIntangiblesAboveMarket	2400000	USD
CY2013Q3	eqr	Ground Lease Intangibles Below Market GroundLeaseIntangiblesBelowMarket	178251000	USD
	eqr	Income From Continuing Operations Available To Common Shares IncomeFromContinuingOperationsAvailableToCommonShares	47177000	USD
CY2012Q3	eqr	Income From Continuing Operations Available To Common Shares IncomeFromContinuingOperationsAvailableToCommonShares	84957000	USD
CY2013Q3	eqr	Income Loss From Discontinued Operations IncomeLossFromDiscontinuedOperations	2481000	USD
	eqr	Income Loss From Discontinued Operations IncomeLossFromDiscontinuedOperations	33320000	USD
	eqr	Income Loss From Discontinued Operations IncomeLossFromDiscontinuedOperations	127255000	USD
CY2012Q3	eqr	Income Loss From Discontinued Operations IncomeLossFromDiscontinuedOperations	40748000	USD
	eqr	Income Loss From Equity Method Investments Merger IncomeLossFromEquityMethodInvestmentsMerger	51923000	USD
	eqr	Income Loss From Equity Method Investments Merger IncomeLossFromEquityMethodInvestmentsMerger	3000	USD
	eqr	Income Loss From Equity Method Investments Merger Expenses IncomeLossFromEquityMethodInvestmentsMergerExpenses	0	USD
CY2013Q3	eqr	Income Loss From Equity Method Investments Merger Expenses IncomeLossFromEquityMethodInvestmentsMergerExpenses	-1771000	USD
	eqr	Income Loss From Equity Method Investments Merger Expenses IncomeLossFromEquityMethodInvestmentsMergerExpenses	-54781000	USD
CY2012Q3	eqr	Income Loss From Equity Method Investments Merger Expenses IncomeLossFromEquityMethodInvestmentsMergerExpenses	0	USD
	eqr	Income Loss From Investments In Unconsolidated Entities Adjustment IncomeLossFromInvestmentsInUnconsolidatedEntitiesAdjustment	57765000	USD
	eqr	Income Loss From Investments In Unconsolidated Entities Adjustment IncomeLossFromInvestmentsInUnconsolidatedEntitiesAdjustment	3000	USD
	eqr	Increase Decrease In Mortgage Deposits IncreaseDecreaseInMortgageDeposits	-862000	USD
	eqr	Increase Decrease In Mortgage Deposits IncreaseDecreaseInMortgageDeposits	271000	USD
	eqr	Interest Capitalized For Real Estate Under Development InterestCapitalizedForRealEstateUnderDevelopment	-31648000	USD
	eqr	Interest Capitalized For Real Estate Under Development InterestCapitalizedForRealEstateUnderDevelopment	-15163000	USD
	eqr	Interest Capitalized For Unconsolidated Entities Under Development InterestCapitalizedForUnconsolidatedEntitiesUnderDevelopment	-1298000	USD
	eqr	Interest Capitalized For Unconsolidated Entities Under Development InterestCapitalizedForUnconsolidatedEntitiesUnderDevelopment	-613000	USD
CY2013Q3	eqr	Investment In Joint Venture InvestmentInJointVenture	259138385	USD
	eqr	Investmentsinunconsolidatedentities Investmentsinunconsolidatedentities	-9317000	USD
	eqr	Investmentsinunconsolidatedentities Investmentsinunconsolidatedentities	-5423000	USD
	eqr	Investmentsinunconsolidatedentitiesotherliabilities Investmentsinunconsolidatedentitiesotherliabilities	0	USD
	eqr	Investmentsinunconsolidatedentitiesotherliabilities Investmentsinunconsolidatedentitiesotherliabilities	-50046000	USD
CY2013Q3	eqr	Joint Venture Partner Ownership Percentage JointVenturePartnerOwnershipPercentage	0.80
CY2013Q3	eqr	Lease Intangible Assets LeaseIntangibleAssets	180561000	USD
CY2013Q3	eqr	Lease Intangible Assets Net LeaseIntangibleAssetsNet	177340000	USD
CY2013Q3	eqr	Lease Intangible Liabilities LeaseIntangibleLiabilities	10190000	USD
CY2013Q3	eqr	Lease Intangible Liabilities Net LeaseIntangibleLiabilitiesNet	9197000	USD
	eqr	Lease Intangibles Average Term LeaseIntangiblesAverageTerm	6
	eqr	Limited Partners Change In Carrying Value LimitedPartnersChangeInCarryingValue	47029000	USD
	eqr	Limited Partners Change In Redemption Value LimitedPartnersChangeInRedemptionValue	-69344000	USD
	eqr	Line Of Credit Facility Commitment Fee LineOfCreditFacilityCommitmentFee	15 Basis Points
	eqr	Mark To Market Debt Premiums MarkToMarketDebtPremiums	127900000	USD
CY2013Q3	eqr	Master Leased Properties Acquired MasterLeasedPropertiesAcquired	3
CY2013Q3	eqr	Master Leased Units MasterLeasedUnits	853
CY2013Q3	eqr	Merger Expenses MergerExpenses	182000	USD
	eqr	Merger Expenses MergerExpenses	19741000	USD
CY2012Q3	eqr	Merger Expenses MergerExpenses	87000	USD
	eqr	Merger Expenses MergerExpenses	1921000	USD
	eqr	Merger Expenses MergerExpenses	81900000	USD
CY2013Q3	eqr	Military Housing Properties MilitaryHousingProperties	2
CY2013Q3	eqr	Military Housing Units MilitaryHousingUnits	5161
	eqr	Minority Interest Change In Carrying Value MinorityInterestChangeInCarryingValue	47029000	USD
	eqr	Mortgage Deposits Financing Activities MortgageDepositsFinancingActivities	3769000	USD
	eqr	Mortgage Deposits Financing Activities MortgageDepositsFinancingActivities	590000	USD
	eqr	Mortgage Deposits Investing Activities MortgageDepositsInvestingActivities	-1682000	USD
	eqr	Mortgage Deposits Investing Activities MortgageDepositsInvestingActivities	-7623000	USD
	eqr	Mortgage Notes Payable Lump Sum Pay Offs MortgageNotesPayableLumpSumPayOffs	279943000	USD
	eqr	Mortgage Notes Payable Lump Sum Pay Offs MortgageNotesPayableLumpSumPayOffs	701762000	USD
	eqr	Net Income Loss Available To Common Stockholder Basic NetIncomeLossAvailableToCommonStockholderBasic	460233000	USD
CY2012Q3	eqr	Net Income Loss Available To Common Stockholder Basic NetIncomeLossAvailableToCommonStockholderBasic	218603000	USD
CY2013Q3	eqr	Net Income Loss Available To Common Stockholder Basic NetIncomeLossAvailableToCommonStockholderBasic	376155000	USD
	eqr	Net Income Loss Available To Common Stockholder Basic NetIncomeLossAvailableToCommonStockholderBasic	1716528000	USD
CY2013Q3	eqr	Noncontrolling Interest Balance Limited Life Partnerships NoncontrollingInterestBalanceLimitedLifePartnerships	8500000	USD
CY2012Q4	eqr	Noncontrolling Interests Partially Owned Properties NoncontrollingInterestsPartiallyOwnedProperties	77688000	USD
CY2013Q3	eqr	Noncontrolling Interests Partially Owned Properties NoncontrollingInterestsPartiallyOwnedProperties	110635000	USD
CY2013Q3	eqr	Noncontrolling Interests Settlement Value NoncontrollingInterestsSettlementValue	46761561	USD
CY2013Q3	eqr	Number Of Apartments Units Under Development Unconsolidated Projects NumberOfApartmentsUnitsUnderDevelopmentUnconsolidatedProjects	1012
CY2013Q3	eqr	Number Of Joint Ventures NumberOfJointVentures	2
CY2013Q3	eqr	Number Of Operating Properties Under Long Term Ground Leases NumberOfOperatingPropertiesUnderLongTermGroundLeases	9
CY2013Q3	eqr	Number Of Projects In Various Stages Of Development NumberOfProjectsInVariousStagesOfDevelopment	13
CY2013Q3	eqr	Number Of Unconsolidated Projects NumberOfUnconsolidatedProjects	3
CY2013Q3	eqr	Number Of Units In Same Store Properties NumberOfUnitsInSameStoreProperties	82553
	eqr	Number Of Units In Same Store Properties NumberOfUnitsInSameStoreProperties	81099
CY2013Q3	eqr	Number Of Units In Various Stages Of Development NumberOfUnitsInVariousStagesOfDevelopment	3327
	eqr	Other Liabilities Loss From Investments In Unconsolidated Entities Merger OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger	5842000	USD
	eqr	Other Liabilities Loss From Investments In Unconsolidated Entities Merger OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger	0	USD
CY2012Q4	eqr	Other Restricted Cash OtherRestrictedCash	4239000	USD
CY2013Q3	eqr	Other Restricted Cash OtherRestrictedCash	505000	USD
CY2013Q3	eqr	Partially Owned Consolidated Properties PartiallyOwnedConsolidatedProperties	19
CY2013Q3	eqr	Partially Owned Consolidated Units PartiallyOwnedConsolidatedUnits	3752
CY2013Q3	eqr	Partially Owned Limited Life Partnership Properties PartiallyOwnedLimitedLifePartnershipProperties	6
CY2013Q3	eqr	Partially Owned Unconsolidated Properties PartiallyOwnedUnconsolidatedProperties	2
CY2013Q3	eqr	Partially Owned Unconsolidated Units PartiallyOwnedUnconsolidatedUnits	837
	eqr	Partners Payments To Acquire Equity Method Investments PartnersPaymentsToAcquireEquityMethodInvestments	40100000	USD
	eqr	Payments To Acquire Other Capital Assets PaymentsToAcquireOtherCapitalAssets	6716000	USD
	eqr	Payments To Acquire Other Capital Assets PaymentsToAcquireOtherCapitalAssets	3359000	USD
	eqr	Preferred Interests PreferredInterests	65000000	USD
	eqr	Premium On Redemption Of Preferred Shares Cash PremiumOnRedemptionOfPreferredSharesCash	0	USD
	eqr	Premium On Redemption Of Preferred Shares Cash PremiumOnRedemptionOfPreferredSharesCash	-21000	USD
	eqr	Prepayment Penalty Charges PrepaymentPenaltyCharges	71443173	USD
	eqr	Proceeds From Distributions Received From Unconsolidated Subsidiaries ProceedsFromDistributionsReceivedFromUnconsolidatedSubsidiaries	0	USD
	eqr	Proceeds From Distributions Received From Unconsolidated Subsidiaries ProceedsFromDistributionsReceivedFromUnconsolidatedSubsidiaries	25471000	USD
	eqr	Proceeds From Employee Stock Purchase Plan ProceedsFromEmployeeStockPurchasePlan	2973000	USD
	eqr	Proceeds From Employee Stock Purchase Plan ProceedsFromEmployeeStockPurchasePlan	4944000	USD
	eqr	Proceeds From Sale Of Property ProceedsFromSaleOfProperty	4497423000	USD
	eqr	Proceeds From Unsecured Line Of Credit ProceedsFromUnsecuredLineOfCredit	392000000	USD
	eqr	Proceeds From Unsecured Line Of Credit ProceedsFromUnsecuredLineOfCredit	8413000000	USD
	eqr	Properties Acquired PropertiesAcquired	1
	eqr	Properties Collateralized PropertiesCollateralized	1
CY2013Q3	eqr	Properties Contracted To Be Acquired PropertiesContractedToBeAcquired	0
CY2013Q3	eqr	Properties Contracted To Be Disposed PropertiesContractedToBeDisposed	0
	eqr	Properties Designed And Built In Violation Of Accessibility Requirements PropertiesDesignedAndBuiltInViolationOfAccessibilityRequirements	300
	eqr	Property Units Acquired PropertyUnitsAcquired	322
CY2013Q3	eqr	Purchase Price For Commitments To Acquire PurchasePriceForCommitmentsToAcquire	12500000	USD
	eqr	Receivable For Common Shares Op Units Issued ReceivableForCommonSharesOpUnitsIssued	28457000	USD
	eqr	Receivable For Common Shares Op Units Issued ReceivableForCommonSharesOpUnitsIssued	0	USD
CY2013Q3	eqr	Redeemable Noncontrolling Interest Operating Partnership Fair Value Disclosure RedeemableNoncontrollingInterestOperatingPartnershipFairValueDisclosure	376057000	USD
CY2012Q4	eqr	Redeemable Noncontrolling Interest Operating Partnership Fair Value Disclosure RedeemableNoncontrollingInterestOperatingPartnershipFairValueDisclosure	398372000	USD
CY2013Q3	eqr	Redeemable Noncontrolling Interests Operating Partnership RedeemableNoncontrollingInterestsOperatingPartnership	376057000	USD
CY2012Q4	eqr	Redeemable Noncontrolling Interests Operating Partnership RedeemableNoncontrollingInterestsOperatingPartnership	398372000	USD
	eqr	Redemption Of Preferred Shares RedemptionOfPreferredShares	-150000000	USD
	eqr	Redemption Of Preferred Shares RedemptionOfPreferredShares	0	USD
	eqr	Repayments Of Mortgage Notes Payable RepaymentsOfMortgageNotesPayable	9527000	USD
	eqr	Repayments Of Mortgage Notes Payable RepaymentsOfMortgageNotesPayable	11022000	USD
CY2013Q4	eqr	Repayments Of Mortgage Notes Payable RepaymentsOfMortgageNotesPayable	963500000	USD
CY2012Q4	eqr	Resident Security And Utility Deposits ResidentSecurityAndUtilityDeposits	44199000	USD
CY2013Q3	eqr	Resident Security And Utility Deposits ResidentSecurityAndUtilityDeposits	44255000	USD
CY2012Q4	eqr	Restricted Deposits On Real Estate Investments RestrictedDepositsOnRealEstateInvestments	44209000	USD
CY2013Q3	eqr	Restricted Deposits On Real Estate Investments RestrictedDepositsOnRealEstateInvestments	53764000	USD
	eqr	Restricted Share Grants Net RestrictedShareGrantsNet	230646	shares
	eqr	Retail Lease Amortization RetailLeaseAmortization	300000	USD
CY2013Q3	eqr	Retail Lease Amortization RetailLeaseAmortization	100000	USD
CY2013Q3	eqr	Retail Lease Intangibles Above Market RetailLeaseIntangiblesAboveMarket	2310000	USD
CY2013Q3	eqr	Retail Lease Intangibles Below Market RetailLeaseIntangiblesBelowMarket	7790000	USD
CY2013Q3	eqr	Sales Price For Commitments To Dispose SalesPriceForCommitmentsToDispose	27000000	USD
CY2013Q3	eqr	Secured Debt Instrument Fair Value SecuredDebtInstrumentFairValue	6400000000	USD
CY2012Q4	eqr	Secured Debt Instrument Fair Value SecuredDebtInstrumentFairValue	4300000000	USD
	eqr	Segment Reporting Information Net Operating Income SegmentReportingInformationNetOperatingIncome	824020000	USD
CY2013Q3	eqr	Segment Reporting Information Net Operating Income SegmentReportingInformationNetOperatingIncome	412118000	USD
	eqr	Segment Reporting Information Net Operating Income SegmentReportingInformationNetOperatingIncome	1134000000	USD
CY2012Q3	eqr	Segment Reporting Information Net Operating Income SegmentReportingInformationNetOperatingIncome	290408000	USD
	eqr	Segment Reporting Information Non Same Store Net Operating Income SegmentReportingInformationNonSameStoreNetOperatingIncome	1744000	USD
CY2012Q3	eqr	Segment Reporting Information Non Same Store Net Operating Income SegmentReportingInformationNonSameStoreNetOperatingIncome	-663000	USD
	eqr	Segment Reporting Information Non Same Store Net Operating Income SegmentReportingInformationNonSameStoreNetOperatingIncome	267183000	USD
CY2013Q3	eqr	Segment Reporting Information Non Same Store Net Operating Income SegmentReportingInformationNonSameStoreNetOperatingIncome	107813000	USD
	eqr	Segment Reporting Information Revenues SegmentReportingInformationRevenues	1295431000	USD
CY2012Q3	eqr	Segment Reporting Information Revenues SegmentReportingInformationRevenues	448647000	USD
	eqr	Segment Reporting Information Revenues SegmentReportingInformationRevenues	1749374000	USD
CY2013Q3	eqr	Segment Reporting Information Revenues SegmentReportingInformationRevenues	626880000	USD
	eqr	Segment Reporting Information Same Store Net Operating Income SegmentReportingInformationSameStoreNetOperatingIncome	822276000	USD
CY2012Q3	eqr	Segment Reporting Information Same Store Net Operating Income SegmentReportingInformationSameStoreNetOperatingIncome	291071000	USD
	eqr	Segment Reporting Information Same Store Net Operating Income SegmentReportingInformationSameStoreNetOperatingIncome	866817000	USD
CY2013Q3	eqr	Segment Reporting Information Same Store Net Operating Income SegmentReportingInformationSameStoreNetOperatingIncome	304305000	USD
	eqr	Segment Reporting Segment Non Same Store Operating Expenses SegmentReportingSegmentNonSameStoreOperatingExpenses	23811000	USD
CY2012Q3	eqr	Segment Reporting Segment Non Same Store Operating Expenses SegmentReportingSegmentNonSameStoreOperatingExpenses	3789000	USD
	eqr	Segment Reporting Segment Non Same Store Operating Expenses SegmentReportingSegmentNonSameStoreOperatingExpenses	152865000	USD
CY2013Q3	eqr	Segment Reporting Segment Non Same Store Operating Expenses SegmentReportingSegmentNonSameStoreOperatingExpenses	55460000	USD
	eqr	Segment Reporting Segment Non Same Store Rental Income SegmentReportingSegmentNonSameStoreRentalIncome	25555000	USD
CY2012Q3	eqr	Segment Reporting Segment Non Same Store Rental Income SegmentReportingSegmentNonSameStoreRentalIncome	3126000	USD
	eqr	Segment Reporting Segment Non Same Store Rental Income SegmentReportingSegmentNonSameStoreRentalIncome	420048000	USD
CY2013Q3	eqr	Segment Reporting Segment Non Same Store Rental Income SegmentReportingSegmentNonSameStoreRentalIncome	163273000	USD
	eqr	Segment Reporting Segment Operating Expenses SegmentReportingSegmentOperatingExpenses	471411000	USD
CY2012Q3	eqr	Segment Reporting Segment Operating Expenses SegmentReportingSegmentOperatingExpenses	158239000	USD
	eqr	Segment Reporting Segment Operating Expenses SegmentReportingSegmentOperatingExpenses	615374000	USD
CY2013Q3	eqr	Segment Reporting Segment Operating Expenses SegmentReportingSegmentOperatingExpenses	214762000	USD
	eqr	Segment Reporting Segment Same Store Operating Expenses SegmentReportingSegmentSameStoreOperatingExpenses	447600000	USD
CY2012Q3	eqr	Segment Reporting Segment Same Store Operating Expenses SegmentReportingSegmentSameStoreOperatingExpenses	154450000	USD
	eqr	Segment Reporting Segment Same Store Operating Expenses SegmentReportingSegmentSameStoreOperatingExpenses	462509000	USD
CY2013Q3	eqr	Segment Reporting Segment Same Store Operating Expenses SegmentReportingSegmentSameStoreOperatingExpenses	159302000	USD
	eqr	Segment Reporting Segment Same Store Rental Income SegmentReportingSegmentSameStoreRentalIncome	1269876000	USD
CY2012Q3	eqr	Segment Reporting Segment Same Store Rental Income SegmentReportingSegmentSameStoreRentalIncome	445521000	USD
	eqr	Segment Reporting Segment Same Store Rental Income SegmentReportingSegmentSameStoreRentalIncome	1329326000	USD
CY2013Q3	eqr	Segment Reporting Segment Same Store Rental Income SegmentReportingSegmentSameStoreRentalIncome	463607000	USD
	eqr	Settlement Expense SettlementExpense	4200000	USD
CY2012Q4	eqr	Tax Deferred Exchange Proceeds TaxDeferredExchangeProceeds	152182000	USD
CY2013Q3	eqr	Tax Deferred Exchange Proceeds TaxDeferredExchangeProceeds	0	USD
	eqr	Term Loan Facility Spread TermLoanFacilitySpread	0.012
	eqr	Total Operating Expenses TotalOperatingExpenses	471411000	USD
CY2013Q3	eqr	Total Operating Expenses TotalOperatingExpenses	214762000	USD
	eqr	Total Operating Expenses TotalOperatingExpenses	615374000	USD
CY2012Q3	eqr	Total Operating Expenses TotalOperatingExpenses	158239000	USD
	eqr	Unamortized Deferred Financing Costs Written Off UnamortizedDeferredFinancingCostsWrittenOff	1647148	USD
CY2013Q3	eqr	Units Contracted To Be Acquired UnitsContractedToBeAcquired	0
CY2013Q3	eqr	Units Contracted To Be Disposed UnitsContractedToBeDisposed	0
CY2013Q3	eqr	Units Ownership Interest In Operating Partnership UnitsOwnershipInterestInOperatingPartnership	0.038
	eqr	Unrealized Gain Loss On Derivative Instruments Mortgage Notes Payable UnrealizedGainLossOnDerivativeInstrumentsMortgageNotesPayable	-2589000	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Mortgage Notes Payable UnrealizedGainLossOnDerivativeInstrumentsMortgageNotesPayable	0	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Notes Net UnrealizedGainLossOnDerivativeInstrumentsNotesNet	-1523000	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Notes Net UnrealizedGainLossOnDerivativeInstrumentsNotesNet	-3345000	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Other Assets UnrealizedGainLossOnDerivativeInstrumentsOtherAssets	-10609000	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Other Assets UnrealizedGainLossOnDerivativeInstrumentsOtherAssets	5934000	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Other Liabilities UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities	3427000	USD
	eqr	Unrealized Gain Loss On Derivative Instruments Other Liabilities UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities	12336000	USD
CY2012Q4	eqr	Unsecured Debt Instrument Fair Value UnsecuredDebtInstrumentFairValue	5200000000	USD
CY2013Q3	eqr	Unsecured Debt Instrument Fair Value UnsecuredDebtInstrumentFairValue	5800000000	USD
	eqr	Valuation Of Op Units Issued ValuationOfOPUnitsIssued	0	USD
	eqr	Valuation Of Op Units Issued ValuationOfOPUnitsIssued	66606000	USD
	eqr	Value Of Furniture And Fixtures Maximum Range ValueOfFurnitureAndFixturesMaximumRange	13000	USD
	eqr	Value Of Furniture And Fixtures Minimum Range ValueOfFurnitureAndFixturesMinimumRange	3000	USD
	eqr	Various Stages Of Development Date Maturity VariousStagesOfDevelopmentDateMaturity	2016-06-30
	eqr	Various Stages Of Development Date Maturity Unconsolidated VariousStagesOfDevelopmentDateMaturityUnconsolidated	2014-09-30
CY2013Q3	eqr	Weighted Average Ground Lease Amortization Period WeightedAverageGroundLeaseAmortizationPeriod	49.8
	eqr	Weighted Average Interest Rate WeightedAverageInterestRate	0.0506
	eqr	Weighted Average Mortgage Debt Interest Rate WeightedAverageMortgageDebtInterestRate	0.0425
CY2013Q3	eqr	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingDiluted	359811000	shares
	eqr	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingDiluted	352414000	shares
CY2013Q3	eqr	Weighted Average Retail Lease Amortization Period WeightedAverageRetailLeaseAmortizationPeriod	5.3
CY2013Q3	eqr	Wholly Owned Properties WhollyOwnedProperties	363
CY2013Q3	eqr	Wholly Owned Units WhollyOwnedUnits	99192
	eqr	Write Off Unamortized Premium Discount WriteOffUnamortizedPremiumDiscount	3250553	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Period End Date DocumentPeriodEndDate	2013-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000906107
CY2013Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	360410752	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	EQUITY RESIDENTIAL
	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes

Files In Submission

Name	View Source	Status
0000906107-13-000034-index-headers.html	Edgar Link	pending
0000906107-13-000034-index.html	Edgar Link	pending
0000906107-13-000034.txt	Edgar Link	pending
0000906107-13-000034-xbrl.zip	Edgar Link	pending
eqr-20130930.xml	Edgar Link	completed
eqr-20130930.xsd	Edgar Link	pending
eqr-20130930_cal.xml	Edgar Link	unprocessable
eqr-20130930_def.xml	Edgar Link	unprocessable
eqr-20130930_lab.xml	Edgar Link	unprocessable
eqr-20130930_pre.xml	Edgar Link	unprocessable
eqr-2013930xexhibit311.htm	Edgar Link	pending
eqr-2013930xexhibit312.htm	Edgar Link	pending
eqr-2013930xexhibit321.htm	Edgar Link	pending
eqr-2013930xexhibit322.htm	Edgar Link	pending
erpop-2013930xexhibit313.htm	Edgar Link	pending
erpop-2013930xexhibit314.htm	Edgar Link	pending
erpop-2013930xexhibit323.htm	Edgar Link	pending
erpop-2013930xexhibit324.htm	Edgar Link	pending
exhibit101.htm	Edgar Link	pending
exhibit102.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
q31310-q.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
reitstructuregraphic3q13.jpg	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$EQR
EQUITY RESIDENTIAL Stock $eqr

2013 Q3 Form 10-Q Financial Statement

#000090610713000034 Filed on November 07, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EQR EQUITY RESIDENTIAL Stock $eqr

2013 Q3 Form 10-Q Financial Statement

#000090610713000034 Filed on November 07, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EQR
EQUITY RESIDENTIAL Stock $eqr