v3.23.1
Separate Account Assets and Liabilities - Separate account assets (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value $ 84,853 $ 109,111
Equity Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 48,866 64,672
Bond Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 9,250 10,759
Balanced Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 24,764 32,361
Money Market Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,973 1,319
Individual Retirement    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 45,178 57,927
Individual Retirement | Equity Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 22,990 29,158
Individual Retirement | Bond Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 3,802 4,745
Individual Retirement | Balanced Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 17,663 23,460
Individual Retirement | Money Market Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 723 564
Group Retirement    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 34,361 45,138
Group Retirement | Equity Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 24,608 33,849
Group Retirement | Bond Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 4,081 4,496
Group Retirement | Balanced Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 5,113 6,326
Group Retirement | Money Market Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 559 467
Life Insurance    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 799 1,044
Life Insurance | Equity Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 687 917
Life Insurance | Bond Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 46 50
Life Insurance | Balanced Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 49 60
Life Insurance | Money Market Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 17 17
Institutional Markets    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 4,515 5,002
Institutional Markets | Equity Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 581 748
Institutional Markets | Bond Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,321 1,468
Institutional Markets | Balanced Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value 1,939 2,515
Institutional Markets | Money Market Funds    
Fair Value, Separate Account Investment [Line Items]    
Separate account assets, at fair value $ 674 $ 271