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Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net $ (481) $ (539) $ 567
Other revenues (372) (527) (449)
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives (125) (172) (12)
Indexed annuity products 864 682 700
Not Designated as Hedging Instrument [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (271) (247) 105
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (15) (131) (34)
Not Designated as Hedging Instrument [Member] | Future [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (31) 22 (25)
Not Designated as Hedging Instrument [Member] | Currency Swap [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net 17 21 20
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (98) (93) (20)
Not Designated as Hedging Instrument [Member] | Consumer Price Index Swap [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net 6 31 46
Not Designated as Hedging Instrument [Member] | Credit Default Swap [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net 42 (66) 33
Not Designated as Hedging Instrument [Member] | Equity [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (28) 14 (33)
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (163) (173) 107
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Indexed Annuity [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Indexed annuity products 17 98 10
Not Designated as Hedging Instrument [Member] | Interest Rate Swaption      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net (33) 3 0
Not Designated as Hedging Instrument [Member] | Total Return Swap [Member]      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net 14 21 0
Not Designated as Hedging Instrument [Member] | Interest Rate Future      
Income Affect Of Non Hedging Derivatives [Line Items]      
Total investment related gains (losses), net $ 1 $ 6 $ 1