v3.26.3
Separate Account Balances - Retirement and Income Solutions (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Changes in separate account liabilities    
Balance at beginning of period $ 193,622.6  
Balance at end of period 194,816.2 $ 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 145,976.2 144,039.2
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 13,894.2 15,458.7
Policy charges (255.5) (344.1)
Surrenders, withdrawals and benefit payments (17,653.1) (17,649.8)
Investment performance 9,342.8 15,664.0
Net transfers (to) from general account (1,987.7) (1,433.1)
Other (642.6) (124.5)
Balance at end of period 139,372.4 136,674.3
Cash surrender value 138,901.6 135,606.1
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 97.8 157.1
Policy charges (111.5) (166.6)
Surrenders, withdrawals and benefit payments (1,149.1) (1,790.0)
Investment performance 404.1 850.5
Net transfers (to) from general account (2.4) (21.0)
Balance at end of period 6,603.8 7,364.9
Cash surrender value $ 6,519.5 $ 7,265.2