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Investment Information - Equity method investments (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method $ 3,896 $ 3,774
Credit related funds    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 1,156 1,136
Private equity    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 944 917
Real estate    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 574 535
Lending    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 533 531
Infrastructure    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 271 245
Equity securities    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 173 169
Fixed income    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method 135 130
Energy    
Schedule of Equity Method Investments [Line Items]    
Investments accounted for using the equity method $ 110 $ 111