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Investments in real estate - Dispositions (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2024 USD ($) ft²	Jun. 30, 2024 USD ($) ft²	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) ft²	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Real Estate Properties
Proceeds from sales of real estate				$ 229,790	$ 761,321
Gain on sales of real estate	$ 27,114		$ 0	27,506	214,810
Impairment of real estate	$ 5,741	$ 30,800	$ 20,649	$ 36,504	$ 189,224
Potential Asset Acquisition, Area of Real Estate | ft²		1,400,000
Potential Acquisition, Payments to Acquire Real Estate		$ 366,800
North America
Real Estate Properties
Area of real estate property | ft²	41,800,000			41,800,000
Proceeds from sales of real estate				$ 238,709
Gain on sales of real estate				27,506
Gross investments in real estate	$ 38,576,419			$ 38,576,419		$ 36,614,318
Canada
Real Estate Properties
Impairment of real estate	$ 5,700
99 A Street
Real Estate Properties
Real Estate Property, Ownership Interest Sold	100.00%			100.00%
Area of real estate property | ft²	235,000			235,000
Proceeds from sales of real estate				$ 13,350
Gain on sales of real estate				$ 0
1165 Eastlake Avenue East
Real Estate Properties
Real Estate Property, Ownership Interest Sold	100.00%			100.00%
Area of real estate property | ft²	100,086			100,086
Proceeds from sales of real estate				$ 149,985
Gain on sales of real estate				$ 21,535
219 East 42nd Street
Real Estate Properties
Real Estate Property, Ownership Interest Sold	100.00%			100.00%
Area of real estate property | ft²	349,947			349,947
Proceeds from sales of real estate				$ 60,000
Gain on sales of real estate				0
Alexandria Center for Life Science - New York City
Real Estate Properties
Gross investments in real estate	$ 165,100			165,100
Other markets
Real Estate Properties
Proceeds from sales of real estate				15,374
Gain on sales of real estate				$ 5,971

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Area of a real estate property.

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The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
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-Name Accounting Standards Codification
-Section 45
-Paragraph 28
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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

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Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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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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