Investments - Detail of equity method investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Investments accounted for using the equity method	$ 2,277	$ 1,814
Equity in earnings of partnerships and similar investments	46	99	$ 267
Real estate-related investments
Schedule of Investments [Line Items]
Investments accounted for using the equity method	1,392	1,320
Equity in earnings of partnerships and similar investments	8	85	233
Private equity funds
Schedule of Investments [Line Items]
Investments accounted for using the equity method	804	457
Equity in earnings of partnerships and similar investments	32	9	32
Private debt funds
Schedule of Investments [Line Items]
Investments accounted for using the equity method	81	37
Equity in earnings of partnerships and similar investments	$ 6	$ 5	$ 2