v3.24.2.u1
Separate Account Assets and Liabilities - Separate account assets (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value $ 94,122 $ 91,005
Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 58,295 55,538
Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 8,590 8,676
Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 25,546 25,166
Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,691 1,625
Individual Retirement    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 49,208 47,893
Individual Retirement | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 26,698 25,451
Individual Retirement | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 4,059 4,037
Individual Retirement | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 17,753 17,711
Individual Retirement | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 698 694
Group Retirement    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 39,679 38,188
Group Retirement | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 30,033 28,675
Group Retirement | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 3,207 3,292
Group Retirement | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 5,635 5,479
Group Retirement | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 804 742
Life Insurance    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,031 932
Life Insurance | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 914 819
Life Insurance | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 45 44
Life Insurance | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 55 53
Life Insurance | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 17 16
Institutional Markets    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 4,204 3,992
Institutional Markets | Equity funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 650 593
Institutional Markets | Bond funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,279 1,303
Institutional Markets | Balanced funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 2,103 1,923
Institutional Markets | Money market funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value $ 172 $ 173