v3.26.1
Investments - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended
Feb. 11, 2026
USD ($)
Mar. 31, 2026
USD ($)
state
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
Percent of total debt securities carrying value          
Investment management arrangement, term 10 years        
Investment management arrangement, automatic renewal term 1 year        
Investment management arrangement, automatic renewal, permissible period 15 years        
Debt securities, rated by investment advisor   $ 839     $ 606
Securities on deposit with regulatory authorities   56     57
Accrued interest written off   1 $ 0    
Aggregate fair value of securities sold at a loss   $ 288 $ 669    
Aggregate fair value of securities sold at a loss, percentage of book value   94.00% 95.00%    
Proceeds from sales of available-for-sale debt securities   $ 636 $ 934    
Unconsolidated VIEs, exposure to loss   2,784     2,709
Equity securities   243     172
Stressed loans   24 29    
Policy loans, fair value under fair value option   3,556     3,537
Policy loans not held as collateral for reinsurance   900     900
Other invested assets   3,246     3,185
Securities loaned   $ 52     34
Securities loaned, minimum percent of fair value required as collateral   102.00%      
Securities loaned, cash collateral   $ 54     35
Outstanding repurchase agreement balance   451     1,001
Corporate securities   500     1,000
Interest expense   25 25    
Collateral upgrade transactions   $ 1,482     1,498
TPG, Inc.          
Percent of total debt securities carrying value          
Payments to acquire equity stake $ 500        
Sale of stock, consideration received $ 150        
Commercial mortgage loans          
Percent of total debt securities carrying value          
Financing receivables, collateralized by properties, number of states | state   36      
Residential mortgage loans          
Percent of total debt securities carrying value          
Financing receivables, collateralized by properties, number of states | state   49      
Unfunded Loan Commitment          
Percent of total debt securities carrying value          
Modified loans, unfunded commitment   $ 8      
Unconsolidated VIEs          
Percent of total debt securities carrying value          
Equity securities   $ 18     $ 21
Corporate debt securities, healthcare          
Percent of total debt securities carrying value          
Unrealized losses   12.00%      
Corporate securities, utilities          
Percent of total debt securities carrying value          
Unrealized losses   19.00%     18.00%
Corporate debt securities, financial services          
Percent of total debt securities carrying value          
Unrealized losses         13.00%
Corporate securities | Single corporate obligor          
Percent of total debt securities carrying value          
Largest unrealized loss   $ 58     $ 55
Equity securities          
Percent of total debt securities carrying value          
Unrealized losses   (64) (2)    
Federal Home Loan Bank capital stock          
Percent of total debt securities carrying value          
Other invested assets   119     119
Real estate          
Percent of total debt securities carrying value          
Other invested assets   231     230
Real estate, foreclosed properties          
Percent of total debt securities carrying value          
Other invested assets   22     20
Limited partnerships          
Percent of total debt securities carrying value          
Other invested assets   2,900     2,800
Repurchase agreements          
Percent of total debt securities carrying value          
Interest expense   2 12    
Collateral upgrade transactions          
Percent of total debt securities carrying value          
Corporate securities   14 16    
Interest expense   16 $ 19    
Collateral upgrade transactions       $ 1,500  
Period of notice prior to termination       150 days  
Corporate securities, collateral upgrade   $ 1,600     $ 1,600
Below investment grade or not rated          
Percent of total debt securities carrying value          
Unrealized losses   18.00%     19.00%