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Other Insurance Liabilities and Separate Accounts - Roll Forward of Separate Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Separate Account, Liability [Roll Forward]    
Separate Accounts liability, beginning of the period $ 5,087 $ 4,881
Premiums and deposits 853 1,118
Surrenders and withdrawals (581) (42)
Benefit payments (947) (984)
Investment earnings (1,130) 53
Net transfers from general account 9 14
Other (63) 47
Separate Accounts liability, end of the period 3,228 5,087
Cash surrender value, end of the period $ 2,087 $ 3,513