v3.26.1
Investments - Schedule of Changes in Unrealized Appreciation (Depreciation) of Available for Sale Securities and Other Investments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]        
Net gains (losses) recognized during the period on equity securities and other investments $ 179 $ 526 $ (62) $ 768
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period (49) 22 (43) 34
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date 228 504 (19) 734
Continuing Operations, Excluding Held-For-Sale        
Debt Securities, Available-for-sale [Line Items]        
Increase (decrease) in unrealized appreciation (depreciation) of investments 167 505 (538) 827
Fixed maturity securities | Continuing Operations, Excluding Held-For-Sale        
Debt Securities, Available-for-sale [Line Items]        
Increase (decrease) in unrealized appreciation (depreciation) of investments 167 505 (500) 827
Other investments | Continuing Operations, Excluding Held-For-Sale        
Debt Securities, Available-for-sale [Line Items]        
Increase (decrease) in unrealized appreciation (depreciation) of investments 0 0 (38) 0
Equities        
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]        
Net gains (losses) recognized during the period on equity securities and other investments 174 14 91 23
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period 102 (12) 119 1
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date 72 26 (28) 22
Other invested assets        
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]        
Net gains (losses) recognized during the period on equity securities and other investments 5 512 (153) 745
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period (151) 34 (162) 33
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date $ 156 $ 478 $ 9 $ 712