Investments - Detail of equity method investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Schedule of Investments [Line Items]
Investments accounted for using the equity method	$ 2,326		$ 2,277
Equity in earnings of partnerships and similar investments	13	$ 25
Real estate-related investments
Schedule of Investments [Line Items]
Investments accounted for using the equity method	1,429		1,392
Equity in earnings of partnerships and similar investments	17	(6)
Private equity
Schedule of Investments [Line Items]
Investments accounted for using the equity method	815		804
Equity in earnings of partnerships and similar investments	(6)	30
Private debt
Schedule of Investments [Line Items]
Investments accounted for using the equity method	82		$ 81
Equity in earnings of partnerships and similar investments	$ 2	$ 1