Investment Information - Equity method investments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	$ 4,251	$ 3,774
Credit related funds
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	1,165	1,136
Private equity
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	1,083	917
Real estate
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	620	535
Lending
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	555	531
Infrastructure
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	298	245
Fixed income
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	258	130
Equity securities
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	171	169
Energy
Schedule of Equity Method Investments [Line Items]
Investments accounted for using the equity method	$ 101	$ 111