Business Combination, Acquisition Related Costs, Abandoned Pursuit Costs

No definition available.

Name:	avb_BusinessCombinationAcquisitionRelatedCostsAbandonedPursuitCosts
Namespace Prefix:	avb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of unconsolidated real estate entities in which the entity had investments as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	avb_EquityMethodInvestmentNumberOfUnconsolidatedRealEstateEntities
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loan Potential Term Extension Period

+ References

No definition available.

+ Details

Name:	avb_LoanPotentialTermExtensionPeriod
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Long-Term Debt, Cap Interest Rate

+ References

No definition available.

+ Details

Name:	avb_LongTermDebtCapInterestRate
Namespace Prefix:	avb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long-Term Loan Guarantee, Payment Reimbursement By Partner, Percentage

+ References

No definition available.

+ Details

Name:	avb_LongTermLoanGuaranteePaymentReimbursementByPartnerPercentage
Namespace Prefix:	avb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long-Term Loan, Maximum Borrowing Capacity, Guarantee, Percentage

+ References

No definition available.

+ Details

Name:	avb_LongTermLoanMaximumBorrowingCapacityGuaranteePercentage
Namespace Prefix:	avb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long-term Loan, Number Of Extension Options

+ References

No definition available.

+ Details

Name:	avb_LongTermLoanNumberOfExtensionOptions
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Apartment Homes Acquired

+ References

No definition available.

+ Details

Name:	avb_NumberOfApartmentHomesAcquired
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Apartment Homes in Communities Owned

+ References

No definition available.

+ Details

Name:	avb_NumberOfApartmentHomesInCommunitiesOwned
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Communities Acquired

+ References

No definition available.

+ Details

Name:	avb_NumberOfCommunitiesAcquired
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Development Rights, No Longer Probable

+ References

No definition available.

+ Details

Name:	avb_NumberOfDevelopmentRightsNoLongerProbable
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Limited Partnership Units Issued

+ References

No definition available.

+ Details

Name:	avb_NumberOfLimitedPartnershipUnitsIssued
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Other Commitment, New

+ References

No definition available.

+ Details

Name:	avb_OtherCommitmentNew
Namespace Prefix:	avb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Other Commitment, Outstanding Funding

+ References

No definition available.

+ Details

Name:	avb_OtherCommitmentOutstandingFunding
Namespace Prefix:	avb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Other Commitments, Number of New SIP Commitments

+ References

No definition available.

+ Details

Name:	avb_OtherCommitmentsNumberOfNewSIPCommitments
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Other Commitments, Number of SIP Commitments

+ References

No definition available.

+ Details

Name:	avb_OtherCommitmentsNumberOfSIPCommitments
Namespace Prefix:	avb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Other Commitments, Weighted Average Rate Of Return

+ References

No definition available.

+ Details

Name:	avb_OtherCommitmentsWeightedAverageRateOfReturn
Namespace Prefix:	avb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-4

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-2

+ Details

Name:	us-gaap_ImpairmentOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income earned from interest bearing assets classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476153/220-40-55-21

+ Details

Name:	us-gaap_InterestIncomeOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the purchase of other real estate investments held by the entity for investment purposes not otherwise defined in the taxonomy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireOtherRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from borrowings to finance the cost of construction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromConstructionLoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a borrowing supported by a written promise to pay an obligation.

+ References

+ Details

Name:	us-gaap_ProceedsFromNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

+ Details

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

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=avb_DownREITPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=avb_AvalonAlderwoodPlaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OtherCommitmentsAxis=avb_StructuredInvestmentProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=avb_NewEnglandRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=avb_EmergencyResponseAndPipeBurstImpairmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=avb_CaliforniaAndMetroNYNJRegionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=avb_SevereWeatherAndFireMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=avb_UnconsolidatedRealEstateEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=avb_AVAArtsDistrictMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=avb_AvalonAlderwoodPlaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=avb_JointVenturePartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Investments - Narrative (Details) $ in Thousands	1 Months Ended		3 Months Ended			9 Months Ended
Investments - Narrative (Details) $ in Thousands	Sep. 30, 2025 USD ($) home commitment extensionOption entity	Apr. 30, 2025 USD ($) home community limitedPartnershipUnit	Sep. 30, 2025 USD ($) home commitment extensionOption entity	Jun. 30, 2025 community	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) commitment yr home developmentRight entity extensionOption	Sep. 30, 2024 USD ($) developmentRight	Dec. 31, 2024 USD ($)
Equity method investment
Payments to acquire other real estate						$ 643,975	$ 278,363
Number of new SIP commitments \| home						2
Other commitment, new						$ 48,000
Other commitments, number of SIP commitments \| commitment	9		9			9
Other commitment	$ 239,585		$ 239,585			$ 239,585
Weighted average rate of return on other commitments	11.70%		11.70%			11.70%
Other commitment, outstanding funding	$ 206,876		$ 206,876			$ 206,876
Total principal outstanding	$ 8,784,124		$ 8,784,124			$ 8,784,124		$ 8,134,429
Long-term construction loan, maximum borrowing capacity, guarantee, percentage	25.00%		25.00%			25.00%
Loan guarantee, payment reimbursement by partner, percentage	75.00%		75.00%			75.00%
Nonoperating expense related to development pursuits			$ (1,392)		$ (1,573)	$ (8,629)	(7,235)
Abandoned pursuit costs						$ 3,668	$ 1,600
Number of development rights, no longer probable \| developmentRight						1	1
Casualty and impairment loss			$ 0		0	$ 858	$ 2,935
DownREIT Partnership
Equity method investment
Number of communities acquired \| community		6		6
Apartment homes acquired \| home		1,844
Payments to acquire other real estate		$ 193,000
Number of limited partnership units issued \| limitedPartnershipUnit		1,060,000
Avalon Alderwood Place
Equity method investment
Payments to acquire other real estate	$ 71,250
Number of apartment homes in communities owned \| home	328		328			328
Structured Investment Program
Equity method investment
Interest income, other			$ 7,068		$ 4,657	$ 19,888	11,773
New England region \| Emergency Response
Equity method investment
Casualty and impairment loss						$ 858
California and Metro NY/NJ regions \| Severe Weather and Fire
Equity method investment
Casualty and impairment loss							$ 2,935
Unconsolidated real estate entities
Equity method investment
Number of unconsolidated real estate entities \| entity	4		4			4
AVA Arts District
Equity method investment
Ownership percentage	25.00%		25.00%			25.00%
Total principal outstanding	$ 173,000		$ 173,000			$ 173,000
Interest rate cap	8.20%		8.20%			8.20%
Number of extension options \| extensionOption	2		2			2
Loan potential term extension period \| yr						1
Proceeds from construction loans						$ 158,735
Proceeds from notes payable						$ 161,567
Avalon Alderwood Place \| Joint Venture Partner
Equity method investment
Ownership percentage	50.00%		50.00%			50.00%
Minimum \| Unconsolidated real estate entities
Equity method investment
Ownership percentage	20.00%		20.00%			20.00%
Maximum \| Unconsolidated real estate entities
Equity method investment
Ownership percentage	28.60%		28.60%			28.60%