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Business Combination Exchange Ratio

No definition available.

Name:	avb_BusinessCombinationExchangeRatio
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Business Combination, Merger Termination Fee Maximum Exposure

No definition available.

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Business Combination, Post Merger Ownership Percent

No definition available.

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Estimated number of apartment homes in communities awaiting development.

No definition available.

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Number of owned communities (or where a direct or indirect interest is owned) that are under construction.

No definition available.

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The number of real estate properties owned as of the balance sheet date.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2

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The number of states the entity operates in as of the balance sheet date.

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The number of units in a real estate property owned as of the balance sheet date.

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Data Type:	xbrli:integerItemType
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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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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.

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Name:	srt_OwnershipAxis=avb_LegacyEquityResidentialShareholdersMember
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Data Type:	na
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Name:	srt_OwnershipAxis=avb_FormerAvalonBayStockholdersMember
Namespace Prefix:
Data Type:	na
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Namespace Prefix:
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