Real Estate and Other Activities - Investments in Unconsolidated Real Estate Joint Ventures - Additional Information (Details) - Investments in Unconsolidated Real Estate Joint Ventures [Member] $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Business Acquisition [Line Items]
Percentage of equity investment	100.00%
Dividend income	$ 66
Switzerland [Member]
Business Acquisition [Line Items]
Dividend income	$ 27
Maximum [Member]
Business Acquisition [Line Items]
Percentage of equity investment	100.00%