v3.26.1
Separate Account Balances - Retirement and Income Solutions (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Changes in separate account liabilities    
Balance at beginning of period $ 193,622.6  
Balance at end of period 202,396.0 $ 193,622.6
Retirement and Income Solutions    
Changes in separate account liabilities    
Balance at beginning of period 144,039.2  
Balance at end of period 150,330.8 144,039.2
Retirement and Income Solutions | Group retirement contracts    
Changes in separate account liabilities    
Balance at beginning of period 136,674.3 125,103.1
Premiums and deposits 9,202.0 15,458.7
Policy charges (165.6) (344.1)
Surrenders, withdrawals and benefit payments (11,060.0) (17,649.8)
Investment performance 10,443.4 15,664.0
Net transfers (to) from general account (1,501.4) (1,433.1)
Other (348.8) (124.5)
Balance at end of period 143,243.9 136,674.3
Cash surrender value 142,494.6 135,606.1
Retirement and Income Solutions | Individual variable annuities    
Changes in separate account liabilities    
Balance at beginning of period 7,364.9 8,334.9
Premiums and deposits 62.1 157.1
Policy charges (75.3) (166.6)
Surrenders, withdrawals and benefit payments (742.9) (1,790.0)
Investment performance 479.2 850.5
Net transfers (to) from general account (1.1) (21.0)
Balance at end of period 7,086.9 7,364.9
Cash surrender value $ 6,996.0 $ 7,265.2