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Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) - USD ($) $ in Millions | 12 Months Ended
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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

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