v3.26.1
Separate Account Assets and Liabilities - Separate account assets (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value $ 90,520 $ 95,585
Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 55,047 58,504
Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 8,534 8,771
Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 25,385 26,677
Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,554 1,633
Group Retirement    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 38,518 40,701
Group Retirement | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 28,855 30,683
Group Retirement | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 3,116 3,160
Group Retirement | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 5,781 6,055
Group Retirement | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 766 803
Life Insurance    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,092 1,149
Life Insurance | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 972 1,027
Life Insurance | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 47 48
Life Insurance | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 58 59
Life Insurance | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 15 15
Institutional Markets    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 4,956 4,957
Institutional Markets | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 698 721
Institutional Markets | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,388 1,398
Institutional Markets | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 2,716 2,660
Institutional Markets | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 154 178
Corporate & Other    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 45,954 48,778
Corporate & Other | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 24,522 26,073
Corporate & Other | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 3,983 4,165
Corporate & Other | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 16,830 17,903
Corporate & Other | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value $ 619 $ 637