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Organization and basis of presentation (Details) ft² in Millions, $ in Billions	9 Months Ended
	Sep. 30, 2023 USD ($) ft² property
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Tenants | property	800
Market capitalization | $	$ 28.3
Area of real estate property | ft²	75.1

X

- Definition

Market Capitalization

+ References

No definition available.

+ Details

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Namespace Prefix:	are_
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Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the number of tenants.

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No definition available.

+ Details

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Namespace Prefix:	are_
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X

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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