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Investments - Carrying Amounts of Other Invested Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Investments [Line Items]    
Alternative investments $ 3,227 $ 3,456
All other investments 1,633 1,728
Total 7,015 6,696
Accumulated depreciation on investment in real estate 143 142
Hedge Funds    
Investments [Line Items]    
Total 130 175
Private equity funds    
Investments [Line Items]    
Alternative investments 2,945 3,090
Total 2,900 3,000
Alternative equity security    
Investments [Line Items]    
All other investments 254 300
Corebridge Financial Inc    
Investments [Line Items]    
Equity method investments 0 1,512
Convex Group Limited    
Investments [Line Items]    
Equity method investments $ 2,155 $ 0