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Segment Reporting Segment Reporting (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting [Abstract] |  |  |
Rental income from real estate assets sold or held for sale | $ 44,951 | $ 73,168 | $ 175,915
Operating expenses from real estate assets sold or held for sale | (16,539) | (27,814) | (62,841)
Net operating income from real estate assets sold or held for sale | $ 28,412 | $ 45,354 | $ 113,074

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- Definition Disposal Group, Not Discontinued Operation, Net Operating Income From Assets Held For Sale, Not Classified As Discontinued Operations + References No definition available. + Details
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Period Type: | duration

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- Definition Operating Expenses From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
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Namespace Prefix: | avb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Revenue From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
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Namespace Prefix: | avb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration