Investments - Detail of equity method investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Schedule of Investments [Line Items]
Investments accounted for using the equity method	$ 1,733		$ 1,700
Equity in earnings of partnerships and similar investments	57	$ 133
Real estate-related investments
Schedule of Investments [Line Items]
Investments accounted for using the equity method	1,297		1,229
Equity in earnings of partnerships and similar investments	47	100
Private equity
Schedule of Investments [Line Items]
Investments accounted for using the equity method	401		438
Equity in earnings of partnerships and similar investments	8	33
Private debt
Schedule of Investments [Line Items]
Investments accounted for using the equity method	35		$ 33
Equity in earnings of partnerships and similar investments	$ 2	$ 0