Real Estate - 2022 Real Estate Investment Acquisitions (Details) $ in Millions	1 Months Ended					12 Months Ended
	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	May 31, 2022 USD ($) property	Mar. 31, 2022 USD ($) property	Jan. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) property
Massachusetts | Lab
Real Estate [Line Items]
Payments to acquire real estate | $	$ 9	$ 18			$ 72	$ 498
Number of properties acquired | property						8
California | Lab
Real Estate [Line Items]
Payments to acquire real estate | $					$ 24	$ 20
Number of properties acquired | property						1
Texas | Outpatient medical
Real Estate [Line Items]
Payments to acquire real estate | $				$ 43
Number of properties acquired | property				2
ARKANSAS | Outpatient medical
Real Estate [Line Items]
Payments to acquire real estate | $			$ 26
Number of properties acquired | property			1