$EQR
EQUITY RESIDENTIAL Stock $eqr

$eqr Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-Q Financial Statement

#000090610713000016 Filed on May 09, 2013

Income Statement

Concept	2013 Q1	2012 Q1
Revenue	$504.7M	$446.4M
YoY Change	13.05%	14.56%
Cost Of Revenue	$187.8M	$163.9M
YoY Change	14.58%	-8.28%
Gross Profit	$317.0M	$266.4M
YoY Change	18.99%	-6.13%
Gross Profit Margin	62.81%	59.67%
Selling, General & Admin	$16.50M	$13.70M
YoY Change	20.44%	20.18%
% of Gross Profit	5.21%	5.14%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$196.2M	$148.2M
YoY Change	32.36%	-6.44%
% of Gross Profit	61.9%	55.65%
Operating Expenses	$212.7M	$157.5M
YoY Change	35.05%	-6.75%
Operating Profit	$104.2M	$102.1M
YoY Change	2.09%	12.45%
Interest Expense	-$201.1M	-$120.4M
YoY Change	67.03%	-1.63%
% of Operating Profit	-192.91%	-117.91%
Other Income/Expense, Net	-$21.70M	$2.600M
YoY Change	-934.62%	18.18%
Pretax Income	-$118.6M	-$13.26M
YoY Change	794.45%	51.86%
Income Tax	$405.0K	$170.0K
% Of Pretax Income
Net Earnings	$1.018B	$145.3M
YoY Change	600.41%	14.11%
Net Earnings / Revenue	201.63%	32.55%
Basic Earnings Per Share	$3.01	$0.47
Diluted Earnings Per Share	$3.01	$0.47
COMMON SHARES
Basic Shares Outstanding	337.5M shares	298.8M shares
Diluted Shares Outstanding	337.5M shares	298.8M shares

Balance Sheet

Concept	2013 Q1	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$56.00M	$220.0M
YoY Change	-74.55%	-28.1%
Cash & Equivalents	$56.09M	$219.6M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$56.00M	$220.0M
YoY Change	-74.55%	-28.1%
LONG-TERM ASSETS
Property, Plant & Equipment	$22.93B	$15.88B
YoY Change	44.41%	3.97%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$193.0M	$15.00M
YoY Change	1186.67%	275.0%
Other Assets	$258.0M	$239.0M
YoY Change	7.95%	-33.8%
Total Long-Term Assets	$23.74B	$16.26B
YoY Change	45.99%	3.12%
TOTAL ASSETS
Total Short-Term Assets	$56.00M	$220.0M
Total Long-Term Assets	$23.74B	$16.26B
Total Assets	$23.80B	$16.48B
YoY Change	44.38%	2.53%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$105.0M	$77.00M
YoY Change	36.36%	-3.75%
Accrued Expenses	$89.00M	$79.00M
YoY Change	12.66%	9.72%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$417.0M	$331.0M
YoY Change	25.98%	3.76%
LONG-TERM LIABILITIES
Long-Term Debt	$12.16B	$9.413B
YoY Change	29.13%	-2.73%
Other Long-Term Liabilities	$401.0M	$261.0M
YoY Change	53.64%	0.0%
Total Long-Term Liabilities	$12.56B	$9.674B
YoY Change	29.79%	-2.66%
TOTAL LIABILITIES
Total Short-Term Liabilities	$417.0M	$331.0M
Total Long-Term Liabilities	$12.56B	$9.674B
Total Liabilities	$12.97B	$10.01B
YoY Change	29.67%	-7.33%
SHAREHOLDERS EQUITY
Retained Earnings	$1.760B	$656.0M
YoY Change	168.29%
Common Stock	$3.601M	$3.005M
YoY Change	19.83%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$10.12B	$5.822B
YoY Change
Total Liabilities & Shareholders Equity	$23.80B	$16.48B
YoY Change	44.38%	2.53%

Cashflow Statement

Concept	2013 Q1	2012 Q1
OPERATING ACTIVITIES
Net Income	$1.018B	$145.3M
YoY Change	600.41%	14.11%
Depreciation, Depletion And Amortization	$196.2M	$148.2M
YoY Change	32.36%	-6.44%
Cash From Operating Activities	$193.5M	$234.2M
YoY Change	-17.39%	24.91%
INVESTING ACTIVITIES
Capital Expenditures	-$93.80M	-$251.4M
YoY Change	-62.69%	34.94%
Acquisitions	$4.001B	$0.00
YoY Change
Other Investing Activities	-$947.8M	$169.6M
YoY Change	-658.84%	14.36%
Cash From Investing Activities	-$1.042B	-$81.87M
YoY Change	1172.31%	115.4%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00	$152.1M
YoY Change	-100.0%	-1.59%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$291.6M	-$316.7M
YoY Change	-192.07%	15.21%
NET CHANGE
Cash From Operating Activities	$193.5M	$234.2M
Cash From Investing Activities	-$1.042B	-$81.87M
Cash From Financing Activities	$291.6M	-$316.7M
Net Change In Cash	-$556.5M	-$164.3M
YoY Change	238.73%	31.08%
FREE CASH FLOW
Cash From Operating Activities	$193.5M	$234.2M
Capital Expenditures	-$93.80M	-$251.4M
Free Cash Flow	$287.3M	$485.6M
YoY Change	-40.84%	29.91%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-193148000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-182508000	USD
CY2013Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	8492845000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	6542355000	USD
CY2013Q1	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	26599000	USD
CY2012Q1	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-1567000	USD
CY2013Q1	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-7071000	USD
CY2012Q1	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	3429000	USD
CY2013Q1	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	8139000	USD
CY2013Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7023000	USD
CY2012Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2934000	USD
CY2013Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	292000	USD
CY2012Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	USD
CY2013Q1	us-gaap	Assets Assets	23795158000	USD
CY2012Q4	us-gaap	Assets Assets	17201000000	USD
CY2013Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	73719000	USD
CY2012Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	74393000	USD
CY2013Q1	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	675000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	675000	USD
CY2013Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2640000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2214000	USD
CY2013Q1	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	0	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	0	USD
CY2013Q1	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	1965000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	1539000	USD
CY2013Q1	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	3.15
CY2012Q1	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.04
CY2012Q1	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.04
CY2013Q1	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	3.15
CY2013Q1	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1179142000	USD
CY2012Q1	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	16366000	USD
CY2012Q1	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	586173000	USD
CY2013Q1	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	638499000	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	86000000	USD
CY2012Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	500000	USD
CY2013Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	100000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	56087000	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
CY2012Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	219628000	USD
CY2012Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-164293000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-556503000	USD
CY2013Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2012Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.3375
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2013Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	360063675	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	325054654	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	325054654	shares
CY2013Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	360063675	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	3251000	USD
CY2013Q1	us-gaap	Common Stock Value CommonStockValue	3601000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	152044000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1028326000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	43348000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6868000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	158912000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1071674000	USD
CY2012Q1	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	92952000	USD
CY2013Q1	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	107083000	USD
CY2012Q1	us-gaap	Costs And Expenses CostsAndExpenses	331972000	USD
CY2013Q1	us-gaap	Costs And Expenses CostsAndExpenses	421633000	USD
CY2013Q1	us-gaap	Debt Instrument Description Of Variable Rate Basis DebtInstrumentDescriptionOfVariableRateBasis	LIBOR plus 1.75%
CY2013Q2	us-gaap	Debt Instrument Interest Rate Effective Percentage Rate Range Maximum DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum	0.03998
CY2013Q1	us-gaap	Debt Instrument Interest Rate Stated Percentage Rate Range Maximum DebtInstrumentInterestRateStatedPercentageRateRangeMaximum	0.1125
CY2013Q1	us-gaap	Debt Instrument Interest Rate Stated Percentage Rate Range Minimum DebtInstrumentInterestRateStatedPercentageRateRangeMinimum	0.0010
CY2013Q1	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2014-09-01
CY2013Q1	us-gaap	Debt Instrument Maturity Date Range End1 DebtInstrumentMaturityDateRangeEnd1	2026-12-31
CY2012Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	44382000	USD
CY2013Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	71229000	USD
CY2013Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	36100000	USD
CY2013Q1	us-gaap	Depreciation Depreciation	205272000	USD
CY2012Q1	us-gaap	Depreciation Depreciation	148246000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	53000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1524000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	41236000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	44050000	USD
CY2012Q1	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	0	USD
CY2013Q1	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	0	USD
CY2012Q1	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	3218000	USD
CY2013Q1	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	2814000	USD
CY2012Q1	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	-3563000	USD
CY2013Q1	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	-8272000	USD
CY2012Q4	us-gaap	Development In Process DevelopmentInProcess	387750000	USD
CY2013Q1	us-gaap	Development In Process DevelopmentInProcess	500829000	USD
CY2012Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	132956000	USD
CY2013Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	1198922000	USD
CY2013Q1	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	56000	USD
CY2012Q1	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	101000	USD
CY2012Q1	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	699000	USD
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Interest Expense DisposalGroupIncludingDiscontinuedOperationInterestExpense	34000	USD
CY2012Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	50582000	USD
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	31686000	USD
CY2012Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	33560000	USD
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	15656000	USD
CY2012Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment Net DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNet	1446500000	USD
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	47342000	USD
CY2012Q1	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	84142000	USD
CY2013Q1	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	150751000	USD
CY2012Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	260176000	USD
CY2013Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	1036000	USD
CY2012Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3466000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.475
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.012
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.012
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.475
CY2012Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	89000	USD
CY2013Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	257000	USD
CY2013Q1	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.20
CY2013Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	508951000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	232439000	USD
CY2013Q1	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	1234836000	USD
CY2012Q4	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	1343765000	USD
CY2013Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	16496000	USD
CY2012Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13688000	USD
CY2012Q1	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	-752000	USD
CY2013Q1	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	-6345000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-16590000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-148068000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-106579000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-13256000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-153352000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-13426000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.439
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.055
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.439
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.055
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	1214386000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	165593000	USD
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1164718000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	158423000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.530
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	3.451
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	3.451
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.530
CY2012Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2013Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-355000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	407000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	170000	USD
CY2012Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	560000	USD
CY2013Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	483000	USD
CY2013Q1	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	47498000	USD
CY2012Q1	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	41616000	USD
CY2012Q1	us-gaap	Increase Decrease In Fair Value Of Hedged Item In Interest Rate Fair Value Hedge1 IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1	1300000	USD
CY2013Q1	us-gaap	Increase Decrease In Fair Value Of Hedged Item In Interest Rate Fair Value Hedge1 IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1	1471000	USD
CY2012Q1	us-gaap	Increase Decrease In Fair Value Of Interest Rate Fair Value Hedging Instruments1 IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1	-1300000	USD
CY2013Q1	us-gaap	Increase Decrease In Fair Value Of Interest Rate Fair Value Hedging Instruments1 IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1	-1471000	USD
CY2012Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-8632000	USD
CY2013Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	1039000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	12262000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	15220000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-18437000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-16878000	USD
CY2012Q1	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	-2768000	USD
CY2013Q1	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	1733000	USD
CY2013Q1	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	-5268000	USD
CY2012Q1	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	182000	USD
CY2013Q1	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	0	USD
CY2012	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	0	USD
CY2012Q1	us-gaap	Interest And Other Income InterestAndOtherIncome	169000	USD
CY2013Q1	us-gaap	Interest And Other Income InterestAndOtherIncome	256000	USD
CY2013Q1	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	-8413000	USD
CY2012Q1	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	-4996000	USD
CY2012Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	118011000	USD
CY2013Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	195685000	USD
CY2012Q1	us-gaap	Interest Paid Net InterestPaidNet	125435000	USD
CY2013Q1	us-gaap	Interest Paid Net InterestPaidNet	182356000	USD
CY2013Q1	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	88518000	USD
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	76223000	USD
CY2013Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	16900000	USD
CY2012Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	14135740000	USD
CY2013Q1	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	18222448000	USD
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	17877000	USD
CY2013Q1	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	193338000	USD
CY2012Q4	us-gaap	Land Land	4554912000	USD
CY2013Q1	us-gaap	Land Land	6319353000	USD
CY2013Q1	us-gaap	Land Available For Development LandAvailableForDevelopment	577676000	USD
CY2012Q4	us-gaap	Land Available For Development LandAvailableForDevelopment	353823000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	9275521000	USD
CY2013Q1	us-gaap	Liabilities Liabilities	12973313000	USD
CY2013Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	23795158000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	17201000000	USD
CY2013Q1	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	112262000	USD
CY2012Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	114705000	USD
CY2013Q1	us-gaap	Line Of Credit LineOfCredit	395000000	USD
CY2012Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2012Q1	us-gaap	Management Fees Revenue ManagementFeesRevenue	2064000	USD
CY2013Q1	us-gaap	Management Fees Revenue ManagementFeesRevenue	2160000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	237294000	USD
CY2013Q1	us-gaap	Minority Interest MinorityInterest	311160000	USD
CY2013Q1	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-50109000	USD
CY2013Q1	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	43323000	USD
CY2012Q1	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	6418000	USD
CY2013Q1	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	205230000	USD
CY2012Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	159606000	USD
CY2013Q1	us-gaap	Minority Interest Ownership Percentage By Parent MinorityInterestOwnershipPercentageByParent	0.962
CY2012Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-316673000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	291556000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1041573000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-81865000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	234245000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	193514000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	1017686000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	145299000	USD
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1016650000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	141833000	USD
CY2013Q1	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	34100000	USD
CY2012Q1	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	1034000	USD
CY2013Q1	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	2533000	USD
CY2013Q1	us-gaap	Notes Payable NotesPayable	5379890000	USD
CY2012Q4	us-gaap	Notes Payable NotesPayable	4630875000	USD
CY2013Q2	us-gaap	Notional Amount Of Interest Rate Derivatives NotionalAmountOfInterestRateDerivatives	150000000	USD
CY2013Q1	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	416
CY2013Q1	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	13
CY2013Q1	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	118778
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	114476000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	117529000	USD
CY2013Q1	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	537002000	USD
CY2012Q1	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	444384000	USD
CY2013Q1	us-gaap	Other Assets OtherAssets	358136000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	170372000	USD
CY2013Q1	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	2640000	USD
CY2012Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	2214000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-873000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10640000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6745000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	3563000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	8272000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	3218000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	2814000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	427000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-36000	USD
CY2013Q1	us-gaap	Other Liabilities OtherLiabilities	401225000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	304518000	USD
CY2013Q1	us-gaap	Other Liabilities Fair Value Disclosure OtherLiabilitiesFairValueDisclosure	71026000	USD
CY2012Q4	us-gaap	Other Liabilities Fair Value Disclosure OtherLiabilitiesFairValueDisclosure	70655000	USD
CY2012Q1	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	5807000	USD
CY2013Q1	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	2564000	USD
CY2013Q1	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	22489000	USD
CY2012Q1	us-gaap	Owned Property Management Costs OwnedPropertyManagementCosts	23339000	USD
CY2012Q1	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	30225000	USD
CY2013Q1	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	26599000	USD
CY2013Q1	us-gaap	Payments For Proceeds From Deposits On Real Estate Acquisitions PaymentsForProceedsFromDepositsOnRealEstateAcquisitions	-101668000	USD
CY2012Q1	us-gaap	Payments For Proceeds From Deposits On Real Estate Acquisitions PaymentsForProceedsFromDepositsOnRealEstateAcquisitions	27386000	USD
CY2013Q2	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	44700000	USD
CY2013Q1	us-gaap	Payments For Proceeds From Mortgage Deposits PaymentsForProceedsFromMortgageDeposits	0	USD
CY2012Q1	us-gaap	Payments For Proceeds From Mortgage Deposits PaymentsForProceedsFromMortgageDeposits	-209000	USD
CY2013Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	249330000	USD
CY2012Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	168350000	USD
CY2013Q1	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	10837000	USD
CY2012Q1	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	7657000	USD
CY2013Q1	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	USD
CY2012Q1	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3466000	USD
CY2012Q1	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4227000	USD
CY2013Q1	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	13869000	USD
CY2013Q1	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	406000	USD
CY2012Q1	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	1887000	USD
CY2012Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2013Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	4000643000	USD
CY2012Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2396000	USD
CY2013Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	283000	USD
CY2012Q1	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	183112000	USD
CY2013Q1	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	0	USD
CY2013Q1	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	65232000	USD
CY2012Q1	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	35876000	USD
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2013Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2013Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	1000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	1000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	1000000	shares
CY2013Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	1000000	shares
CY2013Q1	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	50000000	USD
CY2012Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	50000000	USD
CY2013Q2	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	495600000	USD
CY2012Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	152058000	USD
CY2013Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2013Q2	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	500000000	USD
CY2012Q1	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	921000	USD
CY2013Q1	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	3299000	USD
CY2012Q1	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	0	USD
CY2013Q1	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	750000000	USD
CY2013Q1	us-gaap	Proceeds From Partnership Contribution ProceedsFromPartnershipContribution	3000	USD
CY2012Q1	us-gaap	Proceeds From Partnership Contribution ProceedsFromPartnershipContribution	5000	USD
CY2012Q1	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	204272000	USD
CY2013Q1	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	2955398000	USD
CY2012Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	18938000	USD
CY2013Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	7174000	USD
CY2013Q1	us-gaap	Profit Loss ProfitLoss	1061034000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	152167000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	15711944000	USD
CY2013Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	19966235000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	4912221000	USD
CY2013Q1	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	4434775000	USD
CY2012Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	21008429000	USD
CY2013Q1	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	27364093000	USD
CY2013Q1	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	22929318000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	16096208000	USD
CY2012Q1	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	52440000	USD
CY2013Q1	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	68647000	USD
CY2012Q1	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2013Q1	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	5455000000	USD
CY2013Q1	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
CY2012Q1	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	253858000	USD
CY2013Q2	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	400000000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	250442000	USD
CY2013Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	147515000	USD
CY2013Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1759990000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	887355000	USD
CY2013Q1	us-gaap	Revenues Revenues	539162000	USD
CY2012Q1	us-gaap	Revenues Revenues	446448000	USD
CY2013Q1	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	23964	shares
CY2013Q1	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	37704	shares
CY2013Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	34468085	shares
CY2013Q1	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	268547	shares
CY2013Q1	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	464600000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	7289813000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	10123928000	USD
CY2013Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10435088000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7527107000	USD
CY2012Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-1000	USD
CY2013Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2013Q1	us-gaap	Unrealized Gain Loss On Interest Rate Cash Flow Hedges Pretax Accumulated Other Comprehensive Income Loss UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss	183600000	USD
CY2012	us-gaap	Unrealized Gain Loss On Interest Rate Cash Flow Hedges Pretax Accumulated Other Comprehensive Income Loss UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss	194700000	USD
CY2013Q1	us-gaap	Unsecured Debt UnsecuredDebt	5800000000	USD
CY2013Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	5000000	USD
CY2012Q4	us-gaap	Secured Debt SecuredDebt	3898369000	USD
CY2013Q1	us-gaap	Secured Debt SecuredDebt	6380424000	USD
CY2013Q1	us-gaap	Security Deposit Liability SecurityDepositLiability	72669000	USD
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	66988000	USD
CY2012Q1	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	444384000	USD
CY2013Q1	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	537002000	USD
CY2012Q1	us-gaap	Service Management Costs ServiceManagementCosts	1307000	USD
CY2013Q1	us-gaap	Service Management Costs ServiceManagementCosts	1646000	USD
CY2013Q1	us-gaap	Share Based Compensation ShareBasedCompensation	10236000	USD
CY2012Q1	us-gaap	Share Based Compensation ShareBasedCompensation	8968000	USD
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	337532000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	298805000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	298805000	shares
CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	337532000	shares
CY2013Q1	eqr	Ability To Increase Line Of Credit AbilityToIncreaseLineOfCredit	500000000	USD
CY2013Q1	eqr	Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrentOtherThanInterestAndDividendPayable	104836000	USD
CY2012Q4	eqr	Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrentOtherThanInterestAndDividendPayable	38372000	USD
CY2012Q1	eqr	Acquisition Of Archstone Accounts Payable And Accrued Liabilities AcquisitionOfArchstoneAccountsPayableAndAccruedLiabilities	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Accounts Payable And Accrued Liabilities AcquisitionOfArchstoneAccountsPayableAndAccruedLiabilities	17593000	USD
CY2012Q1	eqr	Acquisition Of Archstone Common Shares Issued AcquisitionOfArchstoneCommonSharesIssued	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Common Shares Issued AcquisitionOfArchstoneCommonSharesIssued	1929868000	USD
CY2013Q1	eqr	Acquisition Of Archstone Deferred Financing Costs AcquisitionOfArchstoneDeferredFinancingCosts	-25780000	USD
CY2012Q1	eqr	Acquisition Of Archstone Deferred Financing Costs AcquisitionOfArchstoneDeferredFinancingCosts	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Deposits Restricted AcquisitionOfArchstoneDepositsRestricted	-474000	USD
CY2012Q1	eqr	Acquisition Of Archstone Deposits Restricted AcquisitionOfArchstoneDepositsRestricted	0	USD
CY2012Q1	eqr	Acquisition Of Archstone Escrow Deposits Mortgage AcquisitionOfArchstoneEscrowDepositsMortgage	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Escrow Deposits Mortgage AcquisitionOfArchstoneEscrowDepositsMortgage	-35898000	USD
CY2013Q1	eqr	Acquisition Of Archstone Income Loss From Discontinued Operations Net Of Tax AcquisitionOfArchstoneIncomeLossFromDiscontinuedOperationsNetOfTax	1213615000	USD
CY2012Q1	eqr	Acquisition Of Archstone Income Loss From Discontinued Operations Net Of Tax AcquisitionOfArchstoneIncomeLossFromDiscontinuedOperationsNetOfTax	166364000	USD
CY2012Q1	eqr	Acquisition Of Archstone Income Loss Including Portion Attributable To Noncontrolling Interest AcquisitionOfArchstoneIncomeLossIncludingPortionAttributableToNoncontrollingInterest	13068000	USD
CY2013Q1	eqr	Acquisition Of Archstone Income Loss Including Portion Attributable To Noncontrolling Interest AcquisitionOfArchstoneIncomeLossIncludingPortionAttributableToNoncontrollingInterest	1130671000	USD
CY2012Q1	eqr	Acquisition Of Archstone Investment In Real Estate Net AcquisitionOfArchstoneInvestmentInRealEstateNet	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Investment In Real Estate Net AcquisitionOfArchstoneInvestmentInRealEstateNet	-8707967000	USD
CY2013Q1	eqr	Acquisition Of Archstone Investments In Unconsolidated Entities AcquisitionOfArchstoneInvestmentsInUnconsolidatedEntities	-218197000	USD
CY2012Q1	eqr	Acquisition Of Archstone Investments In Unconsolidated Entities AcquisitionOfArchstoneInvestmentsInUnconsolidatedEntities	0	USD
CY2012Q1	eqr	Acquisition Of Archstone Mortgage Notes Payable AcquisitionOfArchstoneMortgageNotesPayable	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Mortgage Notes Payable AcquisitionOfArchstoneMortgageNotesPayable	3076876000	USD
CY2013Q1	eqr	Acquisition Of Archstone Noncontrolling Interests Partially Owned Properties AcquisitionOfArchstoneNoncontrollingInterestsPartiallyOwnedProperties	28263000	USD
CY2012Q1	eqr	Acquisition Of Archstone Noncontrolling Interests Partially Owned Properties AcquisitionOfArchstoneNoncontrollingInterestsPartiallyOwnedProperties	0	USD
CY2012Q1	eqr	Acquisition Of Archstone Other Assets AcquisitionOfArchstoneOtherAssets	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Other Assets AcquisitionOfArchstoneOtherAssets	-204523000	USD
CY2013Q1	eqr	Acquisition Of Archstone Other Liabilities AcquisitionOfArchstoneOtherLiabilities	117391000	USD
CY2012Q1	eqr	Acquisition Of Archstone Other Liabilities AcquisitionOfArchstoneOtherLiabilities	0	USD
CY2012Q1	eqr	Acquisition Of Archstone Security Deposits AcquisitionOfArchstoneSecurityDeposits	0	USD
CY2013Q1	eqr	Acquisition Of Archstone Security Deposits AcquisitionOfArchstoneSecurityDeposits	10949000	USD
CY2012Q1	eqr	Acqusition Of Archstone Interest Payable AcqusitionOfArchstoneInterestPayable	0	USD
CY2013Q1	eqr	Acqusition Of Archstone Interest Payable AcqusitionOfArchstoneInterestPayable	11256000	USD
CY2013Q1	eqr	Adjustment Depreciation AdjustmentDepreciation	220038000	USD
CY2012Q1	eqr	Adjustment Depreciation AdjustmentDepreciation	175108000	USD
CY2012Q1	eqr	Allocation Of Net Income Loss To Noncontrolling Interests Partially Owned Properties AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties	450000	USD
CY2013Q1	eqr	Allocation Of Net Income Loss To Noncontrolling Interests Partially Owned Properties AllocationOfNetIncomeLossToNoncontrollingInterestsPartiallyOwnedProperties	25000	USD
CY2012Q1	eqr	Amortization Of Deferred Financing Costs AmortizationOfDeferredFinancingCosts	2974000	USD
CY2013Q1	eqr	Amortization Of Deferred Financing Costs AmortizationOfDeferredFinancingCosts	7176000	USD
CY2013Q1	eqr	Amortization Of Deferred Financing Costs Deferred Financing Costs Net AmortizationOfDeferredFinancingCostsDeferredFinancingCostsNet	7177000	USD
CY2012Q1	eqr	Amortization Of Deferred Financing Costs Deferred Financing Costs Net AmortizationOfDeferredFinancingCostsDeferredFinancingCostsNet	2974000	USD
CY2013Q1	eqr	Amortization Of Deferred Financing Costs Investment In Real Estate Net AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet	-1000	USD
CY2012Q1	eqr	Amortization Of Deferred Financing Costs Investment In Real Estate Net AmortizationOfDeferredFinancingCostsInvestmentInRealEstateNet	0	USD
CY2013Q1	eqr	Amortization Of Deferred Settlements On Derivative Instruments Other Liabilities AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities	-133000	USD
CY2012Q1	eqr	Amortization Of Deferred Settlements On Derivative Instruments Other Liabilities AmortizationOfDeferredSettlementsOnDerivativeInstrumentsOtherLiabilities	-134000	USD
CY2013Q1	eqr	Amortization Of Discounts And Premiums On Debt Mortgage Notes Payable AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable	-7557000	USD
CY2012Q1	eqr	Amortization Of Discounts And Premiums On Debt Mortgage Notes Payable AmortizationOfDiscountsAndPremiumsOnDebtMortgageNotesPayable	-2153000	USD
CY2012Q1	eqr	Amortization Of Discounts And Premiums On Debt Notes Net AmortizationOfDiscountsAndPremiumsOnDebtNotesNet	586000	USD
CY2013Q1	eqr	Amortization Of Discounts And Premiums On Debt Notes Net AmortizationOfDiscountsAndPremiumsOnDebtNotesNet	486000	USD
CY2013Q1	eqr	Amortization Of Intangible Liabilities AmortizationOfIntangibleLiabilities	-168000	USD
CY2013Q1	eqr	Bridge Loan Principal Amount BridgeLoanPrincipalAmount	2500000000	USD
CY2013Q1	eqr	Business Acquisition Proforma Income Loss From Continuing Operations BusinessAcquisitionProformaIncomeLossFromContinuingOperations	-34473000	USD
CY2012Q1	eqr	Business Acquisition Proforma Income Loss From Continuing Operations BusinessAcquisitionProformaIncomeLossFromContinuingOperations	-149998000	USD
CY2013Q1	eqr	Business Acquisition Proforma Weighted Average Common Shares Basic BusinessAcquisitionProformaWeightedAverageCommonSharesBasic	359362000	shares
CY2012Q1	eqr	Business Acquisition Proforma Weighted Average Common Shares Basic BusinessAcquisitionProformaWeightedAverageCommonSharesBasic	355123000	shares
CY2012Q1	eqr	Business Acquisition Proforma Weighted Average Number Of Shares Diluted BusinessAcquisitionProformaWeightedAverageNumberOfSharesDiluted	355123000	shares
CY2013Q1	eqr	Business Acquisition Proforma Weighted Average Number Of Shares Diluted BusinessAcquisitionProformaWeightedAverageNumberOfSharesDiluted	359362000	shares
CY2013Q1	eqr	Common Shares Added To Atm Program CommonSharesAddedToAtmProgram	5700000	shares
CY2013Q1	eqr	Common Shares And Units Outstanding CommonSharesAndUnitsOutstanding	374290400	shares
CY2013Q1	eqr	Common Stock Capital Shares Reserved For Future Issuance Under Share Offering Program CommonStockCapitalSharesReservedForFutureIssuanceUnderShareOfferingProgram	17000000	shares
CY2013Q1	eqr	Consolidated Project Under Development Commitment Fund ConsolidatedProjectUnderDevelopmentCommitmentFund	507700000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs DisposalGroupIncludingDiscontinuedOperationAmortizationOfDeferredFinancingCosts	153000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs DisposalGroupIncludingDiscontinuedOperationAmortizationOfDeferredFinancingCosts	40000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Depreciation DisposalGroupIncludingDiscontinuedOperationDepreciation	14766000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Depreciation DisposalGroupIncludingDiscontinuedOperationDepreciation	26862000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation General And Administrative DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrative	7000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation General And Administrative DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrative	4000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Interest And Other Income DisposalGroupIncludingDiscontinuedOperationInterestAndOtherIncome	28000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Interest And Other Income DisposalGroupIncludingDiscontinuedOperationInterestAndOtherIncome	52000	USD
CY2012Q4	eqr	Disposal Group Including Discontinued Operation Mortgage Notes Payable DisposalGroupIncludingDiscontinuedOperationMortgageNotesPayable	8400000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Other Expenses DisposalGroupIncludingDiscontinuedOperationOtherExpenses	111000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Other Expenses DisposalGroupIncludingDiscontinuedOperationOtherExpenses	1000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Property And Maintenance DisposalGroupIncludingDiscontinuedOperationPropertyAndMaintenance	19849000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Property And Maintenance DisposalGroupIncludingDiscontinuedOperationPropertyAndMaintenance	11870000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance DisposalGroupIncludingDiscontinuedOperationRealEstateTaxesAndInsurance	5042000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance DisposalGroupIncludingDiscontinuedOperationRealEstateTaxesAndInsurance	3797000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operation Rental Revenue DisposalGroupIncludingDiscontinuedOperationRentalRevenue	47342000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operation Rental Revenue DisposalGroupIncludingDiscontinuedOperationRentalRevenue	84142000	USD
CY2013Q1	eqr	Disposal Group Including Discontinued Operations Property Management DisposalGroupIncludingDiscontinuedOperationsPropertyManagement	1000	USD
CY2012Q1	eqr	Disposal Group Including Discontinued Operations Property Management DisposalGroupIncludingDiscontinuedOperationsPropertyManagement	70000	USD
CY2013Q1	eqr	Disposed Properties DisposedProperties	63
CY2013Q1	eqr	Disposed Units DisposedUnits	18452
CY2012Q1	eqr	Distributions Minority Interests Partially Owned Properties DistributionsMinorityInterestsPartiallyOwnedProperties	1762000	USD
CY2013Q1	eqr	Distributions Minority Interests Partially Owned Properties DistributionsMinorityInterestsPartiallyOwnedProperties	3345000	USD
CY2013Q1	eqr	Earnest Money On Acquisitions EarnestMoneyOnAcquisitions	3850000	USD
CY2012Q4	eqr	Earnest Money On Acquisitions EarnestMoneyOnAcquisitions	5613000	USD
CY2012Q4	eqr	Escrow Deposits For Mortgage And Replacement Reserves EscrowDepositsForMortgageAndReplacementReserves	9129000	USD
CY2013Q1	eqr	Escrow Deposits For Mortgage And Replacement Reserves EscrowDepositsForMortgageAndReplacementReserves	39535000	USD
CY2013Q1	eqr	Fair Value Of Serp Investments FairValueOfSerpInvestments	71026000	USD
CY2012Q4	eqr	Fair Value Of Serp Investments FairValueOfSerpInvestments	70655000	USD
CY2013Q1	eqr	Ground Lease Amortization GroundLeaseAmortization	400000	USD
CY2013Q1	eqr	Ground Lease Intangibles Above Market GroundLeaseIntangiblesAboveMarket	2400000	USD
CY2013Q1	eqr	Ground Lease Intangibles Below Market GroundLeaseIntangiblesBelowMarket	178251000	USD
CY2013Q1	eqr	Income Loss From Discontinued Operations IncomeLossFromDiscontinuedOperations	15464000	USD
CY2012Q1	eqr	Income Loss From Discontinued Operations IncomeLossFromDiscontinuedOperations	32637000	USD
CY2013Q1	eqr	Income Loss From Equity Method Investments Merger IncomeLossFromEquityMethodInvestmentsMerger	42213000	USD
CY2012Q1	eqr	Income Loss From Equity Method Investments Merger IncomeLossFromEquityMethodInvestmentsMerger	0	USD
CY2013Q1	eqr	Income Loss From Equity Method Investments Merger Expenses IncomeLossFromEquityMethodInvestmentsMergerExpenses	-46011000	USD
CY2012Q1	eqr	Income Loss From Equity Method Investments Merger Expenses IncomeLossFromEquityMethodInvestmentsMergerExpenses	0	USD
CY2013Q1	eqr	Income Loss From Investments In Unconsolidated Entities Adjustment IncomeLossFromInvestmentsInUnconsolidatedEntitiesAdjustment	46366000	USD
CY2012Q1	eqr	Income Loss From Investments In Unconsolidated Entities Adjustment IncomeLossFromInvestmentsInUnconsolidatedEntitiesAdjustment	0	USD
CY2012Q1	eqr	Increase Decrease In Mortgage Deposits IncreaseDecreaseInMortgageDeposits	-782000	USD
CY2013Q1	eqr	Increase Decrease In Mortgage Deposits IncreaseDecreaseInMortgageDeposits	1651000	USD
CY2013Q1	eqr	Interest Capitalized For Real Estate Under Development InterestCapitalizedForRealEstateUnderDevelopment	-8089000	USD
CY2012Q1	eqr	Interest Capitalized For Real Estate Under Development InterestCapitalizedForRealEstateUnderDevelopment	-4827000	USD
CY2012Q1	eqr	Interest Capitalized For Unconsolidated Entities Under Development InterestCapitalizedForUnconsolidatedEntitiesUnderDevelopment	-169000	USD
CY2013Q1	eqr	Interest Capitalized For Unconsolidated Entities Under Development InterestCapitalizedForUnconsolidatedEntitiesUnderDevelopment	-324000	USD
CY2013Q1	eqr	Investment In Joint Venture InvestmentInJointVenture	212700000	USD
CY2013Q1	eqr	Joint Venture Partner Ownership Percentage JointVenturePartnerOwnershipPercentage	0.80
CY2013Q1	eqr	Land Purchase Price LandPurchasePrice	76100000	USD
CY2013Q2	eqr	Landparcelsacquiredsubsequentevents Landparcelsacquiredsubsequentevents	1
CY2013Q1	eqr	Lease Intangible Assets LeaseIntangibleAssets	180561000	USD
CY2013Q1	eqr	Lease Intangible Assets Net LeaseIntangibleAssetsNet	180101000	USD
CY2013Q1	eqr	Lease Intangible Liabilities LeaseIntangibleLiabilities	10440000	USD
CY2013Q1	eqr	Lease Intangible Liabilities Net LeaseIntangibleLiabilitiesNet	10272000	USD
CY2013Q1	eqr	Limited Partners Change In Carrying Value LimitedPartnersChangeInCarryingValue	38494000	USD
CY2013Q1	eqr	Limited Partners Change In Redemption Value LimitedPartnersChangeInRedemptionValue	-50109000	USD
CY2013Q2	eqr	Liquidation Value Preferred Interests LiquidationValuePreferredInterests	65000000.00	USD
CY2013Q1	eqr	Mark To Market Debt Premiums MarkToMarketDebtPremiums	127900000	USD
CY2013Q1	eqr	Master Leased Properties Acquired MasterLeasedPropertiesAcquired	3
CY2013Q1	eqr	Master Leased Units MasterLeasedUnits	853
CY2013Q1	eqr	Merger Expenses MergerExpenses	19092000	USD
CY2012Q1	eqr	Merger Expenses MergerExpenses	1149000	USD
	eqr	Merger Expenses MergerExpenses	72500000	USD
CY2013Q1	eqr	Military Housing Properties MilitaryHousingProperties	2
CY2013Q1	eqr	Military Housing Units MilitaryHousingUnits	5093
CY2013Q1	eqr	Minority Interest Change In Carrying Value MinorityInterestChangeInCarryingValue	38494000	USD
CY2012Q1	eqr	Mortgage Deposits Financing Activities MortgageDepositsFinancingActivities	37000	USD
CY2013Q1	eqr	Mortgage Deposits Financing Activities MortgageDepositsFinancingActivities	632000	USD
CY2012Q1	eqr	Mortgage Deposits Investing Activities MortgageDepositsInvestingActivities	-83000	USD
CY2013Q1	eqr	Mortgage Deposits Investing Activities MortgageDepositsInvestingActivities	-4473000	USD
CY2013Q1	eqr	Mortgage Notes Payable Lump Sum Pay Offs MortgageNotesPayableLumpSumPayOffs	584020000	USD
CY2012Q1	eqr	Mortgage Notes Payable Lump Sum Pay Offs MortgageNotesPayableLumpSumPayOffs	47800000	USD
CY2013Q1	eqr	Net Income Loss Available To Common Stockholder Basic NetIncomeLossAvailableToCommonStockholderBasic	1016650000	USD
CY2012Q1	eqr	Net Income Loss Available To Common Stockholder Basic NetIncomeLossAvailableToCommonStockholderBasic	141833000	USD
CY2013Q1	eqr	Noncontrolling Interest Balance Limited Life Partnerships NoncontrollingInterestBalanceLimitedLifePartnerships	-8000000	USD
CY2012Q4	eqr	Noncontrolling Interests Partially Owned Properties NoncontrollingInterestsPartiallyOwnedProperties	77688000	USD
CY2013Q1	eqr	Noncontrolling Interests Partially Owned Properties NoncontrollingInterestsPartiallyOwnedProperties	105930000	USD
CY2013Q1	eqr	Noncontrolling Interests Settlement Value NoncontrollingInterestsSettlementValue	35500000	USD
CY2013Q1	eqr	Number Of Apartments Units Under Development Unconsolidated Projects NumberOfApartmentsUnitsUnderDevelopmentUnconsolidatedProjects	1513
CY2013Q2	eqr	Number Of Consolidated Apartment Units Acquired NumberOfConsolidatedApartmentUnitsAcquired	322
CY2013Q2	eqr	Number Of Consolidated Apartment Units Disposed NumberOfConsolidatedApartmentUnitsDisposed	3924
CY2013Q1	eqr	Number Of Joint Venture Loans NumberOfJointVentureLoans	2
CY2013Q1	eqr	Number Of Joint Ventures NumberOfJointVentures	2
CY2013Q1	eqr	Number Of Operating Properties Under Long Term Ground Leases NumberOfOperatingPropertiesUnderLongTermGroundLeases	9
CY2013Q1	eqr	Number Of Projects In Various Stages Of Development NumberOfProjectsInVariousStagesOfDevelopment	11
CY2013Q1	eqr	Number Of Unconsolidated Projects NumberOfUnconsolidatedProjects	4
CY2013Q1	eqr	Number Of Units In Same Store Properties NumberOfUnitsInSameStoreProperties	90350
CY2013Q1	eqr	Number Of Units In Various Stages Of Development NumberOfUnitsInVariousStagesOfDevelopment	2488
CY2012Q1	eqr	Other Liabilities Loss From Investments In Unconsolidated Entities Merger OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger	0	USD
CY2013Q1	eqr	Other Liabilities Loss From Investments In Unconsolidated Entities Merger OtherLiabilitiesLossFromInvestmentsInUnconsolidatedEntitiesMerger	4153000	USD
CY2012Q4	eqr	Other Restricted Cash OtherRestrictedCash	4239000	USD
CY2013Q1	eqr	Other Restricted Cash OtherRestrictedCash	1309000	USD
CY2013Q1	eqr	Partially Owned Consolidated Properties PartiallyOwnedConsolidatedProperties	20
CY2013Q1	eqr	Partially Owned Consolidated Units PartiallyOwnedConsolidatedUnits	3917
CY2013Q1	eqr	Partially Owned Unconsolidated Properties PartiallyOwnedUnconsolidatedProperties	1
CY2013Q1	eqr	Partially Owned Limited Life Partnership Properties PartiallyOwnedLimitedLifePartnershipProperties	6
CY2013Q1	eqr	Partially Owned Unconsolidated Units PartiallyOwnedUnconsolidatedUnits	336
CY2013Q1	eqr	Partners Payments To Acquire Equity Method Investments PartnersPaymentsToAcquireEquityMethodInvestments	40100000	USD
CY2012Q1	eqr	Payments To Acquire Other Capital Assets PaymentsToAcquireOtherCapitalAssets	2229000	USD
CY2013Q1	eqr	Payments To Acquire Other Capital Assets PaymentsToAcquireOtherCapitalAssets	1942000	USD
CY2013Q1	eqr	Prepayment Penalty Charges PrepaymentPenaltyCharges	71400000	USD
CY2013Q1	eqr	Proceeds From Employee Stock Purchase Plan ProceedsFromEmployeeStockPurchasePlan	1763000	USD
CY2012Q1	eqr	Proceeds From Employee Stock Purchase Plan ProceedsFromEmployeeStockPurchasePlan	4210000	USD
CY2013Q1	eqr	Proceeds From Sale Of Property ProceedsFromSaleOfProperty	2975187000	USD
CY2013Q1	eqr	Proceeds From Unsecured Line Of Credit ProceedsFromUnsecuredLineOfCredit	5850000000	USD
CY2012Q1	eqr	Proceeds From Unsecured Line Of Credit ProceedsFromUnsecuredLineOfCredit	0	USD
CY2013Q1	eqr	Project Cost ProjectCost	232800000	USD
CY2013Q2	eqr	Properties Acquired Subsequent PropertiesAcquiredSubsequent	1
CY2013Q1	eqr	Properties Collateralized PropertiesCollateralized	1
CY2013Q1	eqr	Properties Contracted To Be Acquired PropertiesContractedToBeAcquired	0
CY2013Q1	eqr	Properties Contracted To Be Disposed PropertiesContractedToBeDisposed	7
CY2013Q1	eqr	Properties Designed And Built In Violation Of Accessibility Requirements PropertiesDesignedAndBuiltInViolationOfAccessibilityRequirements	300
CY2013Q2	eqr	Properties Sold Subsequent PropertiesSoldSubsequent	12
CY2013Q1	eqr	Purchase Price For Commitments To Acquire PurchasePriceForCommitmentsToAcquire	12500000	USD
CY2012Q1	eqr	Receivable For Common Shares Op Units Issued ReceivableForCommonSharesOpUnitsIssued	28457000	USD
CY2013Q1	eqr	Receivable For Common Shares Op Units Issued ReceivableForCommonSharesOpUnitsIssued	0	USD
CY2013Q1	eqr	Redeemable Noncontrolling Interest Operating Partnership Fair Value Disclosure RedeemableNoncontrollingInterestOperatingPartnershipFairValueDisclosure	386757000	USD
CY2012Q4	eqr	Redeemable Noncontrolling Interests Operating Partnership RedeemableNoncontrollingInterestsOperatingPartnership	398372000	USD
CY2012Q4	eqr	Redeemable Noncontrolling Interest Operating Partnership Fair Value Disclosure RedeemableNoncontrollingInterestOperatingPartnershipFairValueDisclosure	398372000	USD
CY2013Q1	eqr	Redeemable Noncontrolling Interests Operating Partnership RedeemableNoncontrollingInterestsOperatingPartnership	386757000	USD
CY2013Q1	eqr	Redemption Value Limited Partners RedemptionValueLimitedPartners	386757000	USD
CY2012Q4	eqr	Redemption Value Limited Partners RedemptionValueLimitedPartners	398372000	USD
CY2012Q1	eqr	Repayments Of Mortgage Notes Payable RepaymentsOfMortgageNotesPayable	3970000	USD
CY2013Q1	eqr	Repayments Of Mortgage Notes Payable RepaymentsOfMortgageNotesPayable	3244000	USD
CY2013Q1	eqr	Resident Security And Utility Deposits ResidentSecurityAndUtilityDeposits	45870000	USD
CY2012Q4	eqr	Resident Security And Utility Deposits ResidentSecurityAndUtilityDeposits	44199000	USD
CY2013Q1	eqr	Restricted Deposits On Real Estate Investments RestrictedDepositsOnRealEstateInvestments	58604000	USD
CY2012Q4	eqr	Restricted Deposits On Real Estate Investments RestrictedDepositsOnRealEstateInvestments	44209000	USD
CY2013Q1	eqr	Restricted Share Grants Net RestrictedShareGrantsNet	210721	shares
CY2013Q1	eqr	Retail Lease Amortization RetailLeaseAmortization	100000	USD
CY2013Q1	eqr	Retail Lease Intangibles Above Market RetailLeaseIntangiblesAboveMarket	2310000	USD
CY2013Q1	eqr	Retail Lease Intangibles Below Market RetailLeaseIntangiblesBelowMarket	8040000	USD
CY2013Q1	eqr	Sales Price For Commitments To Dispose SalesPriceForCommitmentsToDispose	247115000	USD
CY2012Q4	eqr	Secured Debt Instrument Fair Value SecuredDebtInstrumentFairValue	4300000000	USD
CY2013Q1	eqr	Secured Debt Instrument Fair Value SecuredDebtInstrumentFairValue	6700000000	USD
CY2012Q1	eqr	Segment Reporting Information Net Operating Income SegmentReportingInformationNetOperatingIncome	275653000	USD
CY2013Q1	eqr	Segment Reporting Information Net Operating Income SegmentReportingInformationNetOperatingIncome	338783000	USD
CY2012Q1	eqr	Segment Reporting Information Non Same Store Net Operating Income SegmentReportingInformationNonSameStoreNetOperatingIncome	-5732000	USD
CY2013Q1	eqr	Segment Reporting Information Non Same Store Net Operating Income SegmentReportingInformationNonSameStoreNetOperatingIncome	39586000	USD
CY2012Q1	eqr	Segment Reporting Information Same Store Net Operating Income SegmentReportingInformationSameStoreNetOperatingIncome	281385000	USD
CY2013Q1	eqr	Segment Reporting Information Same Store Net Operating Income SegmentReportingInformationSameStoreNetOperatingIncome	299197000	USD
CY2012Q1	eqr	Segment Reporting Segment Non Same Store Operating Expenses SegmentReportingSegmentNonSameStoreOperatingExpenses	6964000	USD
CY2013Q1	eqr	Segment Reporting Segment Non Same Store Operating Expenses SegmentReportingSegmentNonSameStoreOperatingExpenses	31763000	USD
CY2012Q1	eqr	Segment Reporting Segment Non Same Store Rental Income SegmentReportingSegmentNonSameStoreRentalIncome	1232000	USD
CY2013Q1	eqr	Segment Reporting Segment Non Same Store Rental Income SegmentReportingSegmentNonSameStoreRentalIncome	71349000	USD
CY2012Q1	eqr	Segment Reporting Segment Operating Expenses SegmentReportingSegmentOperatingExpenses	168731000	USD
CY2013Q1	eqr	Segment Reporting Segment Operating Expenses SegmentReportingSegmentOperatingExpenses	198219000	USD
CY2012Q1	eqr	Segment Reporting Segment Same Store Operating Expenses SegmentReportingSegmentSameStoreOperatingExpenses	161767000	USD
CY2013Q1	eqr	Segment Reporting Segment Same Store Operating Expenses SegmentReportingSegmentSameStoreOperatingExpenses	166456000	USD
CY2012Q1	eqr	Segment Reporting Segment Same Store Rental Income SegmentReportingSegmentSameStoreRentalIncome	443152000	USD
CY2013Q1	eqr	Segment Reporting Segment Same Store Rental Income SegmentReportingSegmentSameStoreRentalIncome	465653000	USD
CY2012Q1	eqr	Settlement Expense SettlementExpense	4200000	USD
	eqr	Stock Repurchased And Retired StockRepurchasedAndRetired	0	shares
CY2013Q2	eqr	Subsequent Event Sold Consolidated Property SubsequentEventSoldConsolidatedProperty	552800000	USD
CY2012Q4	eqr	Tax Deferred Exchange Proceeds TaxDeferredExchangeProceeds	152182000	USD
CY2013Q1	eqr	Tax Deferred Exchange Proceeds TaxDeferredExchangeProceeds	37882000	USD
CY2013Q1	eqr	Term Loan Principal Amount TermLoanPrincipalAmount	750000000	USD
CY2013Q1	eqr	Total Operating Expenses TotalOperatingExpenses	198219000	USD
CY2012Q1	eqr	Total Operating Expenses TotalOperatingExpenses	168731000	USD
CY2013Q1	eqr	Unamortized Deferred Financing Costs Written Off UnamortizedDeferredFinancingCostsWrittenOff	1600000	USD
CY2013Q1	eqr	Units Contracted To Be Acquired UnitsContractedToBeAcquired	0
CY2013Q1	eqr	Units Contracted To Be Disposed UnitsContractedToBeDisposed	1566
CY2013Q1	eqr	Units Ownership Interest In Operating Partnership UnitsOwnershipInterestInOperatingPartnership	0.038
CY2012Q1	eqr	Unrealized Gain Loss On Derivative Instruments Mortgage Notes Payable UnrealizedGainLossOnDerivativeInstrumentsMortgageNotesPayable	-588000	USD
CY2013Q1	eqr	Unrealized Gain Loss On Derivative Instruments Mortgage Notes Payable UnrealizedGainLossOnDerivativeInstrumentsMortgageNotesPayable	0	USD
CY2013Q1	eqr	Unrealized Gain Loss On Derivative Instruments Notes Net UnrealizedGainLossOnDerivativeInstrumentsNotesNet	-1471000	USD
CY2012Q1	eqr	Unrealized Gain Loss On Derivative Instruments Notes Net UnrealizedGainLossOnDerivativeInstrumentsNotesNet	-712000	USD
CY2013Q1	eqr	Unrealized Gain Loss On Derivative Instruments Other Assets UnrealizedGainLossOnDerivativeInstrumentsOtherAssets	1471000	USD
CY2012Q1	eqr	Unrealized Gain Loss On Derivative Instruments Other Assets UnrealizedGainLossOnDerivativeInstrumentsOtherAssets	1300000	USD
CY2012Q1	eqr	Unrealized Gain Loss On Derivative Instruments Other Liabilities UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities	-3219000	USD
CY2013Q1	eqr	Unrealized Gain Loss On Derivative Instruments Other Liabilities UnrealizedGainLossOnDerivativeInstrumentsOtherLiabilities	-2814000	USD
CY2013Q1	eqr	Unsecured Debt Instrument Fair Value UnsecuredDebtInstrumentFairValue	6400000000	USD
CY2012Q4	eqr	Unsecured Debt Instrument Fair Value UnsecuredDebtInstrumentFairValue	5200000000	USD
CY2013Q1	eqr	Value Of Furniture And Fixtures Maximum Range ValueOfFurnitureAndFixturesMaximumRange	13000	USD
CY2013Q1	eqr	Value Of Furniture And Fixtures Minimum Range ValueOfFurnitureAndFixturesMinimumRange	3000	USD
CY2013Q2	eqr	Value Of Land Parcels And Rental Properties Acquired Subsequent ValueOfLandParcelsAndRentalPropertiesAcquiredSubsequent	108000000	USD
CY2013Q1	eqr	Various Stages Of Development Date Maturity VariousStagesOfDevelopmentDateMaturity	2015-06-30
CY2013Q1	eqr	Various Stages Of Development Date Maturity Unconsolidated VariousStagesOfDevelopmentDateMaturityUnconsolidated	2014-09-30
CY2013Q1	eqr	Weighted Average Ground Lease Amortization Period WeightedAverageGroundLeaseAmortizationPeriod	49.8
CY2013Q1	eqr	Weighted Average Interest Rate WeightedAverageInterestRate	0.0536
CY2013Q1	eqr	Weighted Average Mortgage Debt Interest Rate WeightedAverageMortgageDebtInterestRate	0.0486
CY2013Q1	eqr	Weighted Average Retail Lease Amortization Period WeightedAverageRetailLeaseAmortizationPeriod	5.3
CY2013Q1	eqr	Wholly Owned Properties WhollyOwnedProperties	390
CY2013Q1	eqr	Wholly Owned Units WhollyOwnedUnits	108579
CY2013Q1	eqr	Write Off Unamortized Premium Discount WriteOffUnamortizedPremiumDiscount	4100000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Period End Date DocumentPeriodEndDate	2013-03-31
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000906107
CY2013Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	360102114	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
0000906107-13-000016-index-headers.html	Edgar Link	pending
0000906107-13-000016-index.html	Edgar Link	pending
0000906107-13-000016.txt	Edgar Link	pending
0000906107-13-000016-xbrl.zip	Edgar Link	pending
eqr-20130331.xml	Edgar Link	completed
eqr-20130331.xsd	Edgar Link	pending
eqr-20130331_cal.xml	Edgar Link	unprocessable
eqr-20130331_def.xml	Edgar Link	unprocessable
eqr-20130331_lab.xml	Edgar Link	unprocessable
eqr-20130331_pre.xml	Edgar Link	unprocessable
eqr-2013331xexhibit311.htm	Edgar Link	pending
eqr-2013331xexhibit312.htm	Edgar Link	pending
eqr-2013331xexhibit321.htm	Edgar Link	pending
eqr-2013331xexhibit322.htm	Edgar Link	pending
erpop-2013331xexhibit313.htm	Edgar Link	pending
erpop-2013331xexhibit314.htm	Edgar Link	pending
erpop-2013331xexhibit323.htm	Edgar Link	pending
erpop-2013331xexhibit324.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
q11310-q.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
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$EQR
EQUITY RESIDENTIAL Stock $eqr

2013 Q1 Form 10-Q Financial Statement

#000090610713000016 Filed on May 09, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EQR EQUITY RESIDENTIAL Stock $eqr

2013 Q1 Form 10-Q Financial Statement

#000090610713000016 Filed on May 09, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EQR
EQUITY RESIDENTIAL Stock $eqr