v3.24.2.u1
Fair Value Measurements - Investments in certain other invested assets (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds $ 7,532 $ 7,690
Private Equity Funds and Hedge Funds    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 5,824 5,840
Unfunded Commitments 2,700 2,770
Private equity funds    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 5,595 5,541
Unfunded Commitments 2,700 2,770
Leveraged buyout    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 2,595 2,445
Unfunded Commitments 1,721 1,755
Real estate    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 1,020 1,074
Unfunded Commitments 564 540
Venture capital    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 199 203
Unfunded Commitments 82 91
Growth equity    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 478 485
Unfunded Commitments 103 109
Mezzanine    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 124 152
Unfunded Commitments 30 42
Other    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 1,179 1,182
Unfunded Commitments 200 233
Hedge funds    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 229 299
Unfunded Commitments 0 0
Event-driven    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 5 4
Unfunded Commitments 0 0
Long-short    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 176 161
Unfunded Commitments 0 0
Macro    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 1 69
Unfunded Commitments 0 0
Other    
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE    
Private equity funds/hedge funds 47 65
Unfunded Commitments $ 0 $ 0