v3.25.2
Reserves for Future Policy Benefits and Contract Owner Account Balances - Contract Owner Account Balances (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Policyholder Account Balance [Roll Forward]          
Beginning Balance     $ 37,104    
Interest credited $ 260 $ 245 516 $ 491  
Ending Balance 40,450   40,450   $ 37,104
Net transfers (from) to separate accounts     (551)   (1,149)
OneAmerica          
Policyholder Account Balance [Roll Forward]          
Deferrals of commissions and expenses     390    
Retirement Deferred Group and Individual Annuity          
Policyholder Account Balance [Roll Forward]          
Beginning Balance     29,624 31,139 31,139
Deposits     1,620   2,505
Fee income     (29)   (50)
Surrenders, withdrawals and benefits     (2,791)   (5,127)
Net transfers (from) to the general account     394   312
Interest credited     453   845
Ending Balance $ 32,729   $ 32,729   $ 29,624
Weighted-average crediting rate 2.80%   2.80%   2.80%
Net amount at risk $ 57   $ 57   $ 90
Cash surrender value 32,296   32,296   29,169
Net transfers (from) to separate accounts     (945)   (1,461)
Retirement Deferred Group and Individual Annuity | OneAmerica          
Policyholder Account Balance [Roll Forward]          
Deferrals of commissions and expenses     3,458   0
Businesses Exited          
Policyholder Account Balance [Roll Forward]          
Beginning Balance     4,182 $ 4,635 4,635
Deposits     134   287
Fee income     (186)   (371)
Surrenders, withdrawals and benefits     (214)   (544)
Net transfers (from) to the general account     3   4
Interest credited     79   171
Ending Balance $ 3,998   $ 3,998   $ 4,182
Weighted-average crediting rate 3.90%   3.90%   3.90%
Net amount at risk $ 648   $ 648   $ 676
Cash surrender value 1,152   1,152   1,236
Businesses Exited | OneAmerica          
Policyholder Account Balance [Roll Forward]          
Deferrals of commissions and expenses     0   0
Non-puttable funding agreement          
Policyholder Account Balance [Roll Forward]          
Beginning Balance     1,249    
Ending Balance 1,400   1,400   1,249
Business Exited Excluded          
Policyholder Account Balance [Roll Forward]          
Beginning Balance     1,158    
Ending Balance 1,115   1,115   1,158
Other          
Policyholder Account Balance [Roll Forward]          
Beginning Balance     891    
Ending Balance $ 1,208   1,208   $ 891
Other | OneAmerica          
Policyholder Account Balance [Roll Forward]          
Deferrals of commissions and expenses     $ 300