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Insurance (Guarantees Related to Annuity Contracts) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Variable Annuity Guarantees: | Guaranteed Death Benefits    
Net Amount at Risk by Product and Guarantee [Line Items]    
Total account value $ 46,345 $ 62,281
Separate account value (1) 30,066 42,043
Net amount at risk $ 5,338 $ 1,490
Average attained age of contractholders 68 years 68 years
Variable Annuity Guarantees: | Guaranteed Annuitization Benefits    
Net Amount at Risk by Product and Guarantee [Line Items]    
Total account value $ 16,953 $ 23,121
Separate account value (1) 15,584 21,508
Net amount at risk $ 433 $ 500
Average attained age of contractholders 68 years 66 years
Other Annuity Guarantees: | Guaranteed Annuitization Benefits    
Net Amount at Risk by Product and Guarantee [Line Items]    
Total account value $ 4,101 $ 5,002
Net amount at risk $ 188 $ 196
Average attained age of contractholders 57 years 56 years