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Goodwill and Specifically Identifiable Intangible Assets (Changes In Carrying Amount Of Goodwill, By Reportable Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Goodwill [Roll Forward]                
Goodwill Gross   $ 3,932 $ 3,932          
Accumulated impairment as of beginning-of-year   (2,154) (2,154)          
Acquisition accounting adjustments   1,778 1,778          
Impairment   (634)            
Net goodwill as of end-of-year $ 1,144 1,144 1,778 $ 1,778 $ 1,778 $ 1,778 $ 1,778 $ 1,778
Annuities Segment [Member]                
Goodwill [Roll Forward]                
Goodwill Gross   1,040 1,040          
Accumulated impairment as of beginning-of-year   (600) (600)          
Acquisition accounting adjustments   440 440          
Net goodwill as of end-of-year   440 440          
Retirement Plan Services Segment [Member]                
Goodwill [Roll Forward]                
Goodwill Gross   20 20          
Acquisition accounting adjustments   20 20          
Net goodwill as of end-of-year   20 20          
Life Insurance Segment [Member]                
Goodwill [Roll Forward]                
Goodwill Gross   2,188 2,188          
Accumulated impairment as of beginning-of-year   (1,554) (1,554)          
Acquisition accounting adjustments   634 634          
Impairment $ (634) (634)            
Net goodwill as of end-of-year     634          
Group Protection Segment [Member]                
Goodwill [Roll Forward]                
Goodwill Gross   684 684          
Acquisition accounting adjustments   684 684          
Net goodwill as of end-of-year   $ 684 $ 684