XML 83 R39.htm IDEA: XBRL DOCUMENT
v3.25.3

Organization and basis of presentation (Details) ft² in Millions, $ in Billions | Sep. 30, 2025 USD ($) ft² Project
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Market capitalization | $ | $ 27.8
Real Estate Properties |
Number of projects expected to commence in the next year | Project | 1
North America |
Real Estate Properties |
Area of real estate property | 39.1
North America | Operating Properties |
Real Estate Properties |
Area of real estate property | 39.1
North America | Active Development/Redevelopment |
Real Estate Properties |
Area of real estate property | 4.2

X
- Definition Market Capitalization + References No definition available. + Details
Name: | are_MarketCapitalization
Namespace Prefix: | are_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Projects Expected Within The Next Year + References No definition available. + Details
Name: | are_NumberOfProjectsExpectedWithinTheNextYear
Namespace Prefix: | are_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Details
Name: | srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=are_OperatingPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=are_ActiveDevelopmentRedevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |