v3.25.3
Investments - Schedule of Activity in Allowance for Credit Losses (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance $ 761 $ 671 $ 709 $ 591
Initial credit losses 4 20 49 111
Securities sold during the period (25) (18) (38) (37)
Additions (reductions) to previously impaired securities 43 5 63 13
Ending balance 783 678 783 678
Nonrelated Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance 760 670 708 590
Initial credit losses 4 20 49 111
Securities sold during the period (25) (18) (38) (37)
Additions (reductions) to previously impaired securities 43 5 63 13
Ending balance 782 677 782 677
Related Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance     1  
Ending balance 1   1  
Corporate | Nonrelated Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance 174 168 175 129
Initial credit losses 0 0 0 48
Securities sold during the period (22) 0 (22) (8)
Additions (reductions) to previously impaired securities (1) 0 (2) (1)
Ending balance 151 168 151 168
Corporate | Related Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance     0  
Ending balance 0   0  
CLO | Nonrelated Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance   0 0 2
Initial credit losses   1   1
Securities sold during the period   0   0
Additions (reductions) to previously impaired securities   0   (2)
Ending balance 0 1 0 1
CLO | Related Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance     0  
Ending balance 0   0  
ABS | Nonrelated Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance 130 67 76 49
Initial credit losses 0 13 40 25
Securities sold during the period 0 (14) (3) (15)
Additions (reductions) to previously impaired securities 30 8 47 15
Ending balance 160 74 160 74
ABS | Related Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance 1 1 1 1
Initial credit losses 0 0 0 0
Securities sold during the period 0 0 0 0
Additions (reductions) to previously impaired securities 0 0 0 0
Ending balance 1 1 1 1
CMBS | Nonrelated Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance 62 57 60 29
Initial credit losses 2 1 2 27
Securities sold during the period 0 0 0 0
Additions (reductions) to previously impaired securities 3 (1) 5 1
Ending balance 67 57 67 57
CMBS | Related Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Ending balance 0   0  
RMBS | Nonrelated Party        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Beginning balance 394 378 397 381
Initial credit losses 2 5 7 10
Securities sold during the period (3) (4) (13) (14)
Additions (reductions) to previously impaired securities 11 (2) 13 0
Ending balance $ 404 $ 377 $ 404 $ 377