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Mortgage Notes Payable, Unsecured Notes and Credit Facility (Details 2) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Other Letter of Credit [Member] |  |
Mortgage Notes Payable, Unsecured Notes and Credit Facility |  |
Outstanding balance of letters of credit | $ 32,079 | $ 24,939

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_DebtInstrumentAxis=avb_OtherLetterofCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |