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Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | $ (123) | $ (240) | $ (200) | $ (379)
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives | (93) | (114) | (123) | (204)
Interest credited | (209) | (138) | (424) | (279)
Not Designated as Hedging Instrument |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (118) | (126) | (95) | (213)
Not Designated as Hedging Instrument | Interest Rate Swaps |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (30) | (44) | (10) | (96)
Not Designated as Hedging Instrument | Financial Futures |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (10) | 23 | (19) | 28
Not Designated as Hedging Instrument | Currency Swap [Member] |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 12 | 11 | 12 | 18
Not Designated as Hedging Instrument | Foreign Currency Forwards |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (74) | (76) | (93) | (99)
Not Designated as Hedging Instrument | Consumer Price Index Swap [Member] |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 6 | (11) | 7 | 18
Not Designated as Hedging Instrument | Credit Default Swaps |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 10 | (33) | 21 | (91)
Not Designated as Hedging Instrument | Equity Options |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (11) | 21 | (25) | 21
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (20) | (56) | 17 | (89)
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member] |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Interest credited | (5) | (44) | (11) | (80)
Not Designated as Hedging Instrument | Interest Rate Future |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 2 | 1 | 2 | 3
Not Designated as Hedging Instrument | Total Return Swap |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 5 | 0 | 8 | 0
Not Designated as Hedging Instrument | Interest Rate Swaption |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | $ (3) | $ (6) | $ (26) | $ (6)

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