Investments - Detail of equity method investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Investments accounted for using the equity method	$ 1,700	$ 1,517
Equity in earnings of partnerships and similar investments	267	321	$ 99
Equity Method Investments, Real Estate-related Investments
Schedule of Investments [Line Items]
Investments accounted for using the equity method	1,229	1,130
Equity in earnings of partnerships and similar investments	233	226	92
Equity Method Investments, Private Equity Funds
Schedule of Investments [Line Items]
Investments accounted for using the equity method	438	352
Equity in earnings of partnerships and similar investments	32	100	18
Equity Method Investments, Private Debt Funds
Schedule of Investments [Line Items]
Investments accounted for using the equity method	33	35
Equity in earnings of partnerships and similar investments	$ 2	$ (5)	$ (11)