$AVB
AVALONBAY COMMUNITIES INC Stock $avb

$avb Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000091591221000004 Filed on February 25, 2021

Income Statement

Concept	2019 Q4	2018 Q4	2018
Revenue	$593.6M	$578.5M	$2.285B
YoY Change	2.6%	4.18%	5.83%
Cost Of Revenue	$190.4M	$192.7M	$770.6M
YoY Change	-1.19%	6.0%	6.25%
Gross Profit	$403.2M	$385.8M	$1.514B
YoY Change	4.51%	3.29%	5.63%
Gross Profit Margin	67.93%	66.69%	66.27%
Selling, General & Admin	$12.60M	$14.40M	$56.40M
YoY Change	-12.5%	21.01%	11.24%
% of Gross Profit	3.13%	3.73%	3.73%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$171.4M	$158.9M	$631.2M
YoY Change	7.87%	1.15%	8.05%
% of Gross Profit	42.51%	41.19%	41.69%
Operating Expenses	$184.0M	$173.3M	$1.700B
YoY Change	6.17%	2.54%	6.64%
Operating Profit	$219.2M	$212.5M	$1.485B
YoY Change	3.15%	3.91%	6.16%
Interest Expense	-$46.30M	-$52.50M	$221.0M
YoY Change	-11.81%	0.77%	10.67%
% of Operating Profit	-21.12%	-24.71%	14.88%
Other Income/Expense, Net
YoY Change
Pretax Income	$169.5M	$385.4M	$974.0M
YoY Change	-56.02%	62.27%	11.09%
Income Tax	$1.800M	-$200.0K	-$160.0K
% Of Pretax Income	1.06%	-0.05%	-0.02%
Net Earnings	$167.7M	$385.6M	$974.5M
YoY Change	-56.52%	62.38%	11.13%
Net Earnings / Revenue	28.25%	66.66%	42.66%
Basic Earnings Per Share	$1.20	$2.79	$7.05
Diluted Earnings Per Share	$1.20	$2.79	$7.05
COMMON SHARES
Basic Shares Outstanding	139.7M shares	138.2M shares	137.8M shares
Diluted Shares Outstanding			138.3M shares

Balance Sheet

Concept	2019 Q4	2018 Q4	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments	$40.00M	$92.00M	$92.00M
YoY Change	-56.52%	37.31%	37.31%
Cash & Equivalents	$39.69M	$91.66M	$92.00M
Short-Term Investments
Other Short-Term Assets	$165.0M	$135.0M	$135.0M
YoY Change	22.22%	-46.64%	-46.64%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$205.0M	$227.0M	$227.0M
YoY Change	-9.69%	-29.06%	-29.06%
LONG-TERM ASSETS
Property, Plant & Equipment	$18.56B	$17.73B	$17.73B
YoY Change	4.66%	0.07%	0.07%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$166.0M	$217.0M	$217.0M
YoY Change	-23.5%	33.13%	33.13%
Other Assets	$158.0M	$174.0M	$174.0M
YoY Change	-9.2%	-3.87%	-3.87%
Total Long-Term Assets	$18.92B	$18.15B	$18.15B
YoY Change	4.2%	0.32%	0.32%
TOTAL ASSETS
Total Short-Term Assets	$205.0M	$227.0M	$227.0M
Total Long-Term Assets	$18.92B	$18.15B	$18.15B
Total Assets	$19.12B	$18.38B	$18.38B
YoY Change	4.03%	-0.19%	-0.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$92.00M	$97.00M	$97.00M
YoY Change	-5.15%	14.12%	14.12%
Accrued Expenses	$441.0M	$344.0M	$344.0M
YoY Change	28.2%	-1.99%	-1.99%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$810.0M	$704.0M	$704.0M
YoY Change	15.06%	1.88%	1.88%
LONG-TERM LIABILITIES
Long-Term Debt	$7.316B	$7.040B	$7.040B
YoY Change	3.92%	-3.94%	-3.94%
Other Long-Term Liabilities	$0.00	$0.00	$0.00
YoY Change
Total Long-Term Liabilities	$7.316B	$7.040B	$7.040B
YoY Change	3.92%	-3.94%	-3.94%
TOTAL LIABILITIES
Total Short-Term Liabilities	$810.0M	$704.0M	$704.0M
Total Long-Term Liabilities	$7.316B	$7.040B	$7.040B
Total Liabilities	$8.128B	$7.744B	$7.748B
YoY Change	4.95%	-3.45%	-3.48%
SHAREHOLDERS EQUITY
Retained Earnings	$282.9M	$350.8M
YoY Change	-19.35%	85.98%
Common Stock	$1.406M	$1.385M
YoY Change	1.52%	0.29%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$10.99B	$10.63B	$10.63B
YoY Change
Total Liabilities & Shareholders Equity	$19.12B	$18.38B	$18.38B
YoY Change	4.03%	-0.19%	-0.19%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018
OPERATING ACTIVITIES
Net Income	$167.7M	$385.6M	$974.5M
YoY Change	-56.52%	62.38%	11.13%
Depreciation, Depletion And Amortization	$171.4M	$158.9M	$631.2M
YoY Change	7.87%	1.15%	8.05%
Cash From Operating Activities	$306.9M	$320.5M	$1.301B
YoY Change	-4.24%	-0.62%	3.57%
INVESTING ACTIVITIES
Capital Expenditures	-$438.0M	-$554.8M	-$1.566B
YoY Change	-21.05%	1462.82%	48.54%
Acquisitions
YoY Change
Other Investing Activities	$1.400M	$453.6M	$968.9M
YoY Change	-99.69%	-248.67%	993.57%
Cash From Investing Activities	-$436.7M	-$101.2M	-$596.7M
YoY Change	331.52%	-70.29%	-38.2%
FINANCING ACTIVITIES
Cash Dividend Paid			$805.2M
YoY Change			4.22%
Common Stock Issuance & Retirement, Net			-$52.26M
YoY Change			-147.04%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-77.40M	-283.1M	-$688.5M
YoY Change	-72.66%	-9536.67%	64.34%
NET CHANGE
Cash From Operating Activities	306.9M	320.5M	$1.301B
Cash From Investing Activities	-436.7M	-101.2M	-$596.7M
Cash From Financing Activities	-77.40M	-283.1M	-$688.5M
Net Change In Cash	-207.2M	-63.80M	$15.96M
YoY Change	224.76%	322.52%	-112.46%
FREE CASH FLOW
Cash From Operating Activities	$306.9M	$320.5M	$1.301B
Capital Expenditures	-$438.0M	-$554.8M	-$1.566B
Free Cash Flow	$744.9M	$875.3M	$2.867B
YoY Change	-14.9%	144.5%	24.09%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000915912
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Entity File Number EntityFileNumber	1-12672
CY2020	dei	Entity Registrant Name EntityRegistrantName	AVALONBAY COMMUNITIES, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	77-0404318
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	4040 Wilson Blvd., Suite 1000
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Arlington
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	VA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	22203
CY2020	dei	City Area Code CityAreaCode	703
CY2020	dei	Local Phone Number LocalPhoneNumber	329-6300
CY2020	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2020	dei	Trading Symbol TradingSymbol	AVB
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
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CY2018	avb	Gain Loss On Sale Of Other Investments Net Of Marketing And Administrative Costs GainLossOnSaleOfOtherInvestmentsNetOfMarketingAndAdministrativeCosts	-1044000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	824459000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	799106000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	974015000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3247000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13003000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-160000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	786103000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	974175000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	76000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	129000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-350000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	827630000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	785974000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	974525000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-17731000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-11930000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	5132000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-8984000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6571000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6143000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	818883000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	780615000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	985800000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.89
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.64
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.05
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.89
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.63
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.05
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10388046000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	974525000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	5132000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6143000	USD
CY2018	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	223000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.88
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	813722000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	40554000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	31705000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10632606000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	785974000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-11930000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6571000	USD
CY2019	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-373000	USD
CY2019	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	649000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	6.08
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	851287000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	393118000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	34870000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10990198000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	827630000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-17731000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-8984000	USD
CY2020	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	210000	USD
CY2020	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-58000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	6.36
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	893152000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-10997000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	183876000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	30966000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10752174000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	827706000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	786103000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	974175000	USD
CY2020	us-gaap	Depreciation Depreciation	707331000	USD
CY2019	us-gaap	Depreciation Depreciation	661578000	USD
CY2018	us-gaap	Depreciation Depreciation	631196000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7454000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7346000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7939000	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1880000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2020	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	8984000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1591000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1701000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9333000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-602000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-17492000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	21603000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	25621000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	20280000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-8673000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-12278000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6583000	USD
CY2020	avb	Casualty Gain And Impairment Loss Net Operating Activities CasualtyGainAndImpairmentLossNetOperatingActivities	0	USD
CY2019	avb	Casualty Gain And Impairment Loss Net Operating Activities CasualtyGainAndImpairmentLossNetOperatingActivities	0	USD
CY2018	avb	Casualty Gain And Impairment Loss Net Operating Activities CasualtyGainAndImpairmentLossNetOperatingActivities	826000	USD
CY2020	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	9262000	USD
CY2019	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	2943000	USD
CY2018	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	501000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	2894000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2019	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	6571000	USD
CY2018	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	6143000	USD
CY2020	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	346041000	USD
CY2019	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	172332000	USD
CY2018	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	385976000	USD
CY2020	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	8213000	USD
CY2019	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	28675000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	19118000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-12583000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3212000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	8621000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	7668000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1219615000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1321804000	USD
CY2018	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	83607000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1301111000	USD
CY2020	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	843907000	USD
CY2019	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	1052011000	USD
CY2018	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	1139954000	USD
CY2020	us-gaap	Payments To Acquire Other Real Estate PaymentsToAcquireOtherRealEstate	0	USD
CY2019	us-gaap	Payments To Acquire Other Real Estate PaymentsToAcquireOtherRealEstate	420517000	USD
CY2018	us-gaap	Payments To Acquire Other Real Estate PaymentsToAcquireOtherRealEstate	338620000	USD
CY2020	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	108531000	USD
CY2019	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	135626000	USD
CY2020	avb	Payments For Capital Improvements Non Real Estate PaymentsForCapitalImprovementsNonRealEstate	28505000	USD
CY2019	avb	Payments For Capital Improvements Non Real Estate PaymentsForCapitalImprovementsNonRealEstate	5266000	USD
CY2018	avb	Payments For Capital Improvements Non Real Estate PaymentsForCapitalImprovementsNonRealEstate	3325000	USD
CY2020	us-gaap	Increase Decrease In Construction Payables IncreaseDecreaseInConstructionPayables	1474000	USD
CY2019	us-gaap	Increase Decrease In Construction Payables IncreaseDecreaseInConstructionPayables	-4848000	USD
CY2018	us-gaap	Increase Decrease In Construction Payables IncreaseDecreaseInConstructionPayables	11606000	USD
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	619773000	USD
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	422041000	USD
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	883313000	USD
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	202033000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	USD
CY2020	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	258000	USD
CY2019	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	692000	USD
CY2018	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	3699000	USD
CY2020	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	3419000	USD
CY2019	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	2779000	USD
CY2018	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	53136000	USD
CY2020	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	11157000	USD
CY2019	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	10454000	USD
CY2018	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	35516000	USD
CY2020	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	36088000	USD
CY2019	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	10183000	USD
CY2018	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	11017000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-179433000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1193869000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-596651000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3464000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	409725000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	52261000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	183876000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock		USD
CY2020	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	883212000	USD
CY2019	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	839646000	USD
CY2018	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	805239000	USD
CY2020	us-gaap	Proceeds From Secured Notes Payable ProceedsFromSecuredNotesPayable	51000000	USD
CY2019	us-gaap	Proceeds From Secured Notes Payable ProceedsFromSecuredNotesPayable	30250000	USD
CY2018	us-gaap	Proceeds From Secured Notes Payable ProceedsFromSecuredNotesPayable	295939000	USD
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	126712000	USD
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	227570000	USD
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	255452000	USD
CY2020	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	1296581000	USD
CY2019	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	449804000	USD
CY2018	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	299442000	USD
CY2020	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	958680000	USD
CY2019	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
CY2018	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	258579000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	11277000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	10909000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	16258000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	USD
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1070000	USD
CY2020	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	25135000	USD
CY2019	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	12309000	USD
CY2018	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	-12598000	USD
CY2020	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-68000	USD
CY2019	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	456000	USD
CY2018	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	14917000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	16101000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	10556000	USD
CY2020	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	48000	USD
CY2019	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	46000	USD
CY2018	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	44000	USD
CY2020	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	384000	USD
CY2019	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	439000	USD
CY2018	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	424000	USD
CY2020	avb	Payment For Redemption Of Preferred Interest Obligation PaymentForRedemptionOfPreferredInterestObligation	1000000	USD
CY2019	avb	Payment For Redemption Of Preferred Interest Obligation PaymentForRedemptionOfPreferredInterestObligation	1400000	USD
CY2018	avb	Payment For Redemption Of Preferred Interest Obligation PaymentForRedemptionOfPreferredInterestObligation	1120000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-854264000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-218185000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-688502000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	185918000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-90250000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	15958000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	127614000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	217864000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	201906000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	313532000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	127614000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	217864000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	196848000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	187570000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	201659000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	216976000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	39687000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	91659000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	96556000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	87927000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	126205000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	313532000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	127614000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	217864000	USD
CY2020	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	2747	shares
CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	458000	USD
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	74173	shares
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	14919000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	1240000	USD
CY2020Q4	avb	Dividends Declared But Not Yet Paid DividendsDeclaredButNotYetPaid	223262000	USD
CY2020	us-gaap	Increase Decrease In Derivative Assets IncreaseDecreaseInDerivativeAssets	4308000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease Adjustments After Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax	1413000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-8984000	USD
CY2019	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	2069	shares
CY2019	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	418000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	16101000	USD
CY2019	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	84710	shares
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	399000	USD
CY2019Q4	avb	Dividends Declared But Not Yet Paid DividendsDeclaredButNotYetPaid	214832000	USD
CY2019	us-gaap	Increase Decrease In Derivative Liabilities IncreaseDecreaseInDerivativeLiabilities	6379000	USD
CY2019	us-gaap	Increase Decrease In Derivative Assets IncreaseDecreaseInDerivativeAssets	388000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6571000	USD
CY2018	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	2272	shares
CY2018	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	387000	USD
CY2018	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	68565	shares
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	10556000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	717000	USD
CY2018Q4	avb	Dividends Declared But Not Yet Paid DividendsDeclaredButNotYetPaid	204191000	USD
CY2018	us-gaap	Increase Decrease In Derivative Liabilities IncreaseDecreaseInDerivativeLiabilities	6366000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6143000	USD
CY2020Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	273	community
CY2020Q4	us-gaap	Number Of Units In Real Estate Property NumberOfUnitsInRealEstateProperty	80094	home
CY2020Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	11	state
CY2020Q4	avb	Number Of Owned Communities Under Construction NumberOfOwnedCommunitiesUnderConstruction	18	community
CY2020Q4	avb	Expected Aggregate Number Of Apartment Homes To Be Constructed ExpectedAggregateNumberOfApartmentHomesToBeConstructed	5931	home
CY2020	avb	Numberof Residential Condominium Units Sold NumberofResidentialCondominiumUnitsSold	70	residential_condominium
CY2020Q4	avb	Additional Numberof Communities Expected To Be Developed AdditionalNumberofCommunitiesExpectedToBeDeveloped	24	community
CY2020Q4	avb	Estimated Number Of Apartment Homes In Communities Expected To Be Developed EstimatedNumberOfApartmentHomesInCommunitiesExpectedToBeDeveloped	7853	home
CY2020	avb	Minimum Percentage Of Distribution Of Adjusted Taxable Income For Deducting Dividends From Federally Taxable Income MinimumPercentageOfDistributionOfAdjustedTaxableIncomeForDeductingDividendsFromFederallyTaxableIncome	0.90
CY2020	avb	Minimum Percentage Of Distribution Of Reit Taxable Income For Federal Income Tax Exemption MinimumPercentageOfDistributionOfREITTaxableIncomeForFederalIncomeTaxExemption	1
CY2020Q4	avb	Excise Tax Refund ExciseTaxRefund	0	USD
CY2020	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	0	USD
CY2018	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	0	USD
CY2019Q4	avb	Excise Tax Refund ExciseTaxRefund	0	USD
CY2019	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	0	USD
CY2018Q4	avb	Excise Tax Refund ExciseTaxRefund	0	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3247000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13003000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-160000	USD
CY2019	avb	Number Of Communities Sold With Deferred Tax Obligations NumberOfCommunitiesSoldWithDeferredTaxObligations	2	community
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020	avb	Common Stock Dividends Ordinary Taxable Distribution Percentage CommonStockDividendsOrdinaryTaxableDistributionPercentage	0.66
CY2019	avb	Common Stock Dividends Ordinary Taxable Distribution Percentage CommonStockDividendsOrdinaryTaxableDistributionPercentage	0.96
CY2018	avb	Common Stock Dividends Ordinary Taxable Distribution Percentage CommonStockDividendsOrdinaryTaxableDistributionPercentage	0.76
CY2020	avb	Capital Gain Tax Rate CapitalGainTaxRate	0.20
CY2018	avb	Capital Gain Tax Rate CapitalGainTaxRate	0.20
CY2019	avb	Capital Gain Tax Rate CapitalGainTaxRate	0.20
CY2020	avb	Common Stock Dividends Long Term Capital Gain Percentage CommonStockDividendsLongTermCapitalGainPercentage	0.24
CY2019	avb	Common Stock Dividends Long Term Capital Gain Percentage CommonStockDividendsLongTermCapitalGainPercentage	0.03
CY2018	avb	Common Stock Dividends Long Term Capital Gain Percentage CommonStockDividendsLongTermCapitalGainPercentage	0.11
CY2020	avb	Common Stock Dividends Unrecaptured Section1250 Gain Percentage CommonStockDividendsUnrecapturedSection1250GainPercentage	0.10
CY2019	avb	Common Stock Dividends Unrecaptured Section1250 Gain Percentage CommonStockDividendsUnrecapturedSection1250GainPercentage	0.01
CY2018	avb	Common Stock Dividends Unrecaptured Section1250 Gain Percentage CommonStockDividendsUnrecapturedSection1250GainPercentage	0.13
CY2020	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Interest Rate Contracts</span></div><div style="text-align:justify"><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company utilizes derivative financial instruments to manage interest rate risk. See Note 11, “Fair Value,” for further discussion of derivative financial instruments.</span></div>
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	140094722	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	139054191	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	137844755	shares
CY2020	us-gaap	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted	7500	shares
CY2019	us-gaap	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted	7500	shares
CY2018	us-gaap	Weighted Average Number Of Limited Partnership And General Partnership Unit Outstanding Basic And Diluted WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted	7500	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	332973	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	509859	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	436986	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	140435195	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	139571550	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	138289241	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	827630000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	785974000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	974525000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	1955000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	2063000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	2839000	USD
CY2020	us-gaap	Undistributed Earnings UndistributedEarnings	825675000	USD
CY2019	us-gaap	Undistributed Earnings UndistributedEarnings	783911000	USD
CY2018	us-gaap	Undistributed Earnings UndistributedEarnings	971686000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	140094722	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	139054191	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	137844755	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.89
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.64
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.05
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	827630000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	785974000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	974525000	USD
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-48000	USD
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-46000	USD
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-44000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	827678000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	786020000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	974569000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	140435195	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	139571550	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	138289241	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.89
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.63
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.05
CY2020	avb	Business Combination Acquisition Related Costs Abandoned Pursuit Costs BusinessCombinationAcquisitionRelatedCostsAbandonedPursuitCosts	12317000	USD
CY2019	avb	Business Combination Acquisition Related Costs Abandoned Pursuit Costs BusinessCombinationAcquisitionRelatedCostsAbandonedPursuitCosts	4896000	USD
CY2018	avb	Business Combination Acquisition Related Costs Abandoned Pursuit Costs BusinessCombinationAcquisitionRelatedCostsAbandonedPursuitCosts	4388000	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2020Q4	avb	Number Of Communities Held For Sale NumberOfCommunitiesHeldForSale	1	community
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Use of Estimates</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.</span></div>
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Reclassifications</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain reclassifications have been made to amounts in prior years' notes to financial statements to conform to current year presentations as a result of changes in held for sale classification, disposition activity and segment classification.</span></div>
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	14072000	USD
CY2020	us-gaap	Revenue Recognition Leases RevenueRecognitionLeases	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Lease Revenue Reserves </span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assesses the collectability of its lease revenue and receivables on an on-going basis. Under ASC 842, Lease Accounting, the Company assesses the probability of receiving all remaining lease amounts due on a lease by lease basis, reserving for revenue and the related receivables for those leases where collection of substantially all of the remaining lease payments is not probable. Subsequently, the Company will only recognize revenue to the extent cash is received. If the Company determines that collection of the remaining lease payments becomes probable at a future date, the Company will recognize the cumulative revenue that would have been recorded under the original lease agreement. </span></div>In addition to the specific reserves recognized under ASC 842, the Company also evaluates its lease receivables for collectability at a portfolio level under ASC 450, Contingencies – Loss Contingencies. The Company recognizes a reserve under ASC 450 when the uncollectible revenue is probable and reasonably estimable. The Company applies this reserve to the population of the Company’s revenue and receivables not specifically addressed as part of the specific ASC 842 reserve.
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	66763000	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	44157000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	62823000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	60331000	USD
CY2020Q4	us-gaap	Notes Payable NotesPayable	7629814000	USD
CY2019Q4	us-gaap	Notes Payable NotesPayable	7355371000	USD
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	7629814000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	7355371000	USD
CY2020Q4	us-gaap	Pledged Assets Not Separately Reported Real Estate PledgedAssetsNotSeparatelyReportedRealEstate	1448551000	USD
CY2020	us-gaap	Debt Instrument Redemption Price Percentage DebtInstrumentRedemptionPricePercentage	1
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	280000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	280000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1902	shares
CY2020	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	2747	shares
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	74173	shares
CY2020	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	20161	shares
CY2020	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	7683	shares
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1225790	shares
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1225790	shares
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	149.99
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	316148000	USD
CY2020	avb	Payment For Redemption Of Preferred Interest Obligation PaymentForRedemptionOfPreferredInterestObligation	1000000	USD
CY2019	avb	Payment For Redemption Of Preferred Interest Obligation PaymentForRedemptionOfPreferredInterestObligation	1400000	USD
CY2018	avb	Payment For Redemption Of Preferred Interest Obligation PaymentForRedemptionOfPreferredInterestObligation	1120000	USD
CY2020	avb	Equity Method Investment Net Income Loss Portion Attributable To Parent EquityMethodInvestmentNetIncomeLossPortionAttributableToParent	8538000	USD
CY2019	avb	Equity Method Investment Net Income Loss Portion Attributable To Parent EquityMethodInvestmentNetIncomeLossPortionAttributableToParent	10779000	USD
CY2018	avb	Equity Method Investment Net Income Loss Portion Attributable To Parent EquityMethodInvestmentNetIncomeLossPortionAttributableToParent	17519000	USD
CY2020	avb	Equity Method Investments Amortization Of Excess Investment And Other EquityMethodInvestmentsAmortizationOfExcessInvestmentAndOther	-2116000	USD
CY2019	avb	Equity Method Investments Amortization Of Excess Investment And Other EquityMethodInvestmentsAmortizationOfExcessInvestmentAndOther	-2127000	USD
CY2018	avb	Equity Method Investments Amortization Of Excess Investment And Other EquityMethodInvestmentsAmortizationOfExcessInvestmentAndOther	-2249000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6422000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8652000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15270000	USD
CY2020	avb	Number Of Communities Acquired NumberOfCommunitiesAcquired	0	community
CY2019	avb	Number Of Communities Acquired NumberOfCommunitiesAcquired	5	community
CY2019	avb	Number Of Apartment Homes Acquired NumberOfApartmentHomesAcquired	1175	home
CY2018	avb	Number Of Communities Acquired NumberOfCommunitiesAcquired	4	community
CY2018	avb	Number Of Apartment Homes Acquired NumberOfApartmentHomesAcquired	1096	home
CY2020Q4	avb	Number Of Communities Held For Sale NumberOfCommunitiesHeldForSale	1	community
CY2020	avb	Numberof Residential Condominium Units Sold NumberofResidentialCondominiumUnitsSold	70	residential_condominium
CY2020Q4	avb	Number Of Residential Condominiums Remaining To Be Sold NumberOfResidentialCondominiumsRemainingToBeSold	102	residential_condominium
CY2020	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	5662000	USD
CY2019	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	3812000	USD
CY2018	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	1044000	USD
CY2020Q4	us-gaap	Inventory Real Estate InventoryRealEstate	267219000	USD
CY2019Q4	us-gaap	Inventory Real Estate InventoryRealEstate	457809000	USD
CY2019	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	6292000	USD
CY2018	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	946000	USD
CY2020Q4	avb	Number Of Office Leases NumberOfOfficeLeases	14	Lease
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	133581000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	20207000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	21685000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	21898000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	20166000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	103063000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	161313000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	120261000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	16011000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	14371000	USD
CY2018	us-gaap	Operating Lease Expense OperatingLeaseExpense	21788000	USD
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P25Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P42Y
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0463
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0474
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	14270000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	13950000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	13469000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	13316000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	13526000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	350440000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	1080000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1082000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1084000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1087000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1089000	USD
CY2018	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	215000	USD
CY2020	avb	Gain On Sale Of Real Estate Assets In Continuing Operations GainOnSaleOfRealEstateAssetsInContinuingOperations	340444000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	39044000	USD
CY2020Q4	avb	Lease Liability Payments Remainder Of Fiscal Year LeaseLiabilityPaymentsRemainderOfFiscalYear	15350000	USD
CY2020Q4	avb	Lease Liability Payments Due Year Two LeaseLiabilityPaymentsDueYearTwo	15032000	USD
CY2020Q4	avb	Lease Liability Payments Due Year Three LeaseLiabilityPaymentsDueYearThree	14553000	USD
CY2020Q4	avb	Lease Liability Payments Due Year Four LeaseLiabilityPaymentsDueYearFour	14403000	USD
CY2020Q4	avb	Lease Liability Payments Due Year Five LeaseLiabilityPaymentsDueYearFive	14615000	USD
CY2020Q4	avb	Lease Liability Payments Due After Year Five LeaseLiabilityPaymentsDueAfterYearFive	389484000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	418971000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	161313000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	257658000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	44466000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	20166000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	24300000	USD
CY2020Q4	avb	Lease Liability Payments Due LeaseLiabilityPaymentsDue	463437000	USD
CY2020Q4	avb	Lease Liability LeaseLiability	181479000	USD
CY2020Q4	avb	Lease Liability Undiscounted Excess Amount LeaseLiabilityUndiscountedExcessAmount	281958000	USD
CY2020	avb	Attainment Percentage Of Physical Occupancy AttainmentPercentageOfPhysicalOccupancy	0.90
CY2020	avb	Anniversary Of Completion Of Development Or Redevelopment AnniversaryOfCompletionOfDevelopmentOrRedevelopment	P1Y
CY2020	us-gaap	Profit Loss ProfitLoss	827706000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	786103000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	974175000	USD
CY2020	avb	Indirect Operating Expenses Net Of Corporate Income IndirectOperatingExpensesNetOfCorporateIncome	97443000	USD
CY2019	avb	Indirect Operating Expenses Net Of Corporate Income IndirectOperatingExpensesNetOfCorporateIncome	83008000	USD
CY2018	avb	Indirect Operating Expenses Net Of Corporate Income IndirectOperatingExpensesNetOfCorporateIncome	80227000	USD
CY2020	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	12399000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	4991000	USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	3265000	USD
CY2020	us-gaap	Interest Expense InterestExpense	214151000	USD
CY2019	us-gaap	Interest Expense InterestExpense	203585000	USD
CY2018	us-gaap	Interest Expense InterestExpense	220974000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9333000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-602000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-17492000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	60343000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	58042000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	60369000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6422000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8652000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15270000	USD
CY2020	us-gaap	Depreciation Depreciation	707331000	USD
CY2019	us-gaap	Depreciation Depreciation	661578000	USD
CY2018	us-gaap	Depreciation Depreciation	631196000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3247000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13003000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-160000	USD
CY2020	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2019	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2019	avb	Gain Loss On Sale Of Other Investments Net Of Marketing And Administrative Costs GainLossOnSaleOfOtherInvestmentsNetOfMarketingAndAdministrativeCosts	-3812000	USD
CY2018	avb	Gain Loss On Sale Of Other Investments Net Of Marketing And Administrative Costs GainLossOnSaleOfOtherInvestmentsNetOfMarketingAndAdministrativeCosts	-1044000	USD
CY2019	avb	Gain On Sale Of Real Estate Assets In Continuing Operations GainOnSaleOfRealEstateAssetsInContinuingOperations	166105000	USD
CY2018	avb	Gain On Sale Of Real Estate Assets In Continuing Operations GainOnSaleOfRealEstateAssetsInContinuingOperations	374976000	USD
CY2020	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	440000	USD
CY2019	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	439000	USD
CY2018	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	345000	USD
CY2020	avb	Gain Loss On Sale Of Other Investments Net Of Marketing And Administrative Costs GainLossOnSaleOfOtherInvestmentsNetOfMarketingAndAdministrativeCosts	2551000	USD
CY2020	avb	Disposal Group Not Discontinued Operation Net Operating Income From Assets Held For Sale Not Classified As Discontinued Operations DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	28412000	USD
CY2019	avb	Disposal Group Not Discontinued Operation Net Operating Income From Assets Held For Sale Not Classified As Discontinued Operations DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	45354000	USD
CY2018	avb	Disposal Group Not Discontinued Operation Net Operating Income From Assets Held For Sale Not Classified As Discontinued Operations DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	113074000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	1547190000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1594174000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1485132000	USD
CY2020	avb	Revenue From Assets Heldfor Sale Not Classified As Discontinued Operations RevenueFromAssetsHeldforSaleNotClassifiedAsDiscontinuedOperations	44951000	USD
CY2019	avb	Revenue From Assets Heldfor Sale Not Classified As Discontinued Operations RevenueFromAssetsHeldforSaleNotClassifiedAsDiscontinuedOperations	73168000	USD
CY2018	avb	Revenue From Assets Heldfor Sale Not Classified As Discontinued Operations RevenueFromAssetsHeldforSaleNotClassifiedAsDiscontinuedOperations	175915000	USD
CY2020	avb	Operating Expenses From Assets Held For Sale Not Classified As Discontinued Operations OperatingExpensesFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	16539000	USD
CY2019	avb	Operating Expenses From Assets Held For Sale Not Classified As Discontinued Operations OperatingExpensesFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	27814000	USD
CY2018	avb	Operating Expenses From Assets Held For Sale Not Classified As Discontinued Operations OperatingExpensesFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	62841000	USD
CY2020	avb	Disposal Group Not Discontinued Operation Net Operating Income From Assets Held For Sale Not Classified As Discontinued Operations DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	28412000	USD
CY2019	avb	Disposal Group Not Discontinued Operation Net Operating Income From Assets Held For Sale Not Classified As Discontinued Operations DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	45354000	USD
CY2018	avb	Disposal Group Not Discontinued Operation Net Operating Income From Assets Held For Sale Not Classified As Discontinued Operations DisposalGroupNotDiscontinuedOperationNetOperatingIncomeFromAssetsHeldForSaleNotClassifiedAsDiscontinuedOperations	113074000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	14072000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	1547190000	USD
CY2020Q4	avb	Real Estate Gross At Carrying Value Excluding Gross Real Estate Assets Held For Sale RealEstateGrossAtCarryingValueExcludingGrossRealEstateAssetsHeldForSale	23917282000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1594174000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	9974000	USD
CY2020Q2	avb	Derivative Notional Amounts Settled During Period DerivativeNotionalAmountsSettledDuringPeriod	250000000	USD
CY2020Q2	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	4821000	USD
CY2019Q4	avb	Real Estate Gross At Carrying Value Excluding Gross Real Estate Assets Held For Sale RealEstateGrossAtCarryingValueExcludingGrossRealEstateAssetsHeldForSale	23157308000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1485132000	USD
CY2018Q4	avb	Real Estate Gross At Carrying Value Excluding Gross Real Estate Assets Held For Sale RealEstateGrossAtCarryingValueExcludingGrossRealEstateAssetsHeldForSale	21544772000	USD
CY2020Q4	avb	Real Estate Held For Sale Gross RealEstateHeldForSaleGross	44940000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3819000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4960000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3572000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	21110000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	24885000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	19707000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	9396000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	10208000	USD
CY2020	avb	Derivative Notional Amounts Settled During Period DerivativeNotionalAmountsSettledDuringPeriod	600000000	USD
CY2020	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	25135000	USD
CY2020Q2	avb	Derivative Notional Amounts Settled During Period DerivativeNotionalAmountsSettledDuringPeriod	250000000	USD
CY2020Q1	avb	Derivative Notional Amounts Settled During Period DerivativeNotionalAmountsSettledDuringPeriod	350000000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	20314000	USD
CY2020Q4	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	2894000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-17731000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6143000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-8984000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6571000	USD
CY2020Q4	avb	Number Of Apartment Homes In Communities Owned NumberOfApartmentHomesInCommunitiesOwned	82103	home
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	4642330000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	16221983000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	3097909000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	4642330000	USD
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	19319892000	USD
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	23962222000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	5728440000	USD
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	22342576000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	5173883000	USD
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4611646000	USD
CY2020Q4	avb	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements Net RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet	18233782000	USD
CY2019Q4	avb	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements Net RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet	18432989000	USD
CY2020Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	7629814000	USD
CY2020	avb	Numberof Residential Condominium Units Sold NumberofResidentialCondominiumUnitsSold	70	residential_condominium
CY2020Q4	srt	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	22969235000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	23606872000	USD
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	22342576000	USD
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	21935936000	USD
CY2020	avb	Real Estate Acquisitions Construction Costs And Improvements RealEstateAcquisitionsConstructionCostsAndImprovements	860594000	USD
CY2019	avb	Real Estate Acquisitions Construction Costs And Improvements RealEstateAcquisitionsConstructionCostsAndImprovements	1615949000	USD
CY2018	avb	Real Estate Acquisitions Construction Costs And Improvements RealEstateAcquisitionsConstructionCostsAndImprovements	1568878000	USD
CY2020	avb	Real Estate Dispositions Including Impairment Loss On Planned Dispositions RealEstateDispositionsIncludingImpairmentLossOnPlannedDispositions	505244000	USD
CY2019	avb	Real Estate Dispositions Including Impairment Loss On Planned Dispositions RealEstateDispositionsIncludingImpairmentLossOnPlannedDispositions	351653000	USD
CY2018	avb	Real Estate Dispositions Including Impairment Loss On Planned Dispositions RealEstateDispositionsIncludingImpairmentLossOnPlannedDispositions	1162238000	USD
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	23962222000	USD
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	23606872000	USD
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4218379000	USD
CY2020	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	707331000	USD
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	661578000	USD
CY2018	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	631196000	USD
CY2020	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	152774000	USD
CY2019	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	99341000	USD
CY2018	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	237929000	USD
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	5728440000	USD
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	5173883000	USD
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	4611646000	USD

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2019 Q4 Form 10-K Financial Statement

#000091591221000004 Filed on February 25, 2021

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$AVB AVALONBAY COMMUNITIES INC Stock $avb

2019 Q4 Form 10-K Financial Statement

#000091591221000004 Filed on February 25, 2021

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