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Investments in and Advances to Unconsolidated Joint Ventures - Narrative (Details) $ in Millions		1 Months Ended	12 Months Ended
	Aug. 01, 2022 USD ($) property	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Difference between carrying amount and underlying equity		$ 49	$ 41
Gain (loss) on deconsolidation			$ 311
Lab
Schedule of Equity Method Investments [Line Items]
Property count \| property		2
Life Science Joint Venture In San Francisco, California \| Lab
Schedule of Equity Method Investments [Line Items]
Investment ownership percentage	70.00%
Property count \| property	7
Callan Ridge Joint Venture
Schedule of Equity Method Investments [Line Items]
Proceeds from nonrefundable deposit		$ 8
Callan Ridge Joint Venture \| Lab
Schedule of Equity Method Investments [Line Items]
Property count \| property		2
Life Science Joint Venture In San Francisco, California \| Life Science Joint Venture In San Francisco, California \| Lab
Schedule of Equity Method Investments [Line Items]
Investment ownership percentage	30.00%
Cash proceeds	$ 126
Callan Ridge Joint Venture \| Callan Ridge Joint Venture \| Lab
Schedule of Equity Method Investments [Line Items]
Investment ownership percentage		65.00%
Cash proceeds		$ 128
Equity method investments		$ 110