Fair Value Fair Value (Details 2)	Sep. 30, 2019 USD ($)
Not Designated as Hedging Instrument \| Interest Rate Cap
Derivative instruments and Hedging Activities
Derivative, Notional Amount	$ 445,015,000
Derivative weighted average interest rate	3.20%
Derivative, average cap interest rate	6.50%
Cash Flow Hedges \| Interest Rate Swap
Derivative instruments and Hedging Activities
Derivative, Notional Amount	$ 350,000,000
Derivative, average cap interest rate	2.10%

Reflects the calculation as of the balance sheet date of the average interest rate weighted by interest rate caps and interest rate swaps at that time.

No definition available.

+ Details

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Namespace Prefix:	avb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Average cap rate on a group of interest rate derivatives, such as interest rate caps or collars. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

+ Details

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- Details

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- Details

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- Details

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- Details

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