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Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |
Document Period End Date | Sep. 30, 2022 |
Notional Amount | $ 30,851 | $ 23,516
Carrying Value / Fair Value of Assets | 536 | 421
Derivative Liability, Fair Value, Gross Liability | 1,302 | 975
Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Notional Amount | 27,967 | 20,557
Carrying Value / Fair Value of Assets | 465 | 388
Derivative Liability, Fair Value, Gross Liability | 1,046 | 930
Not Designated as Hedging Instrument | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 1,048 | 1,273
Carrying Value / Fair Value of Assets | 2 | 66
Derivative Liability, Fair Value, Gross Liability | 7 | 1
Not Designated as Hedging Instrument | Financial Futures |  |
Derivative [Line Items] |  |
Notional Amount | 215 | 240
Carrying Value / Fair Value of Assets | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 0 | 0
Not Designated as Hedging Instrument | Foreign Currency Forwards |  |
Derivative [Line Items] |  |
Notional Amount | 776 | 395
Carrying Value / Fair Value of Assets | 0 | 2
Derivative Liability, Fair Value, Gross Liability | 34 | 4
Not Designated as Hedging Instrument | Consumer Price Index Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 462 | 563
Carrying Value / Fair Value of Assets | 25 | 34
Derivative Liability, Fair Value, Gross Liability | 8 | 7
Not Designated as Hedging Instrument | Credit Default Swaps |  |
Derivative [Line Items] |  |
Notional Amount | 1,723 | 1,321
Carrying Value / Fair Value of Assets | 6 | 29
Derivative Liability, Fair Value, Gross Liability | 50 | 1
Not Designated as Hedging Instrument | Equity Options |  |
Derivative [Line Items] |  |
Notional Amount | 296 | 472
Carrying Value / Fair Value of Assets | 49 | 29
Derivative Liability, Fair Value, Gross Liability | 0 | 0
Not Designated as Hedging Instrument | Currency Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 150 | 150
Carrying Value / Fair Value of Assets | 27 | 1
Derivative Liability, Fair Value, Gross Liability | 0 | 0
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 0
Carrying Value / Fair Value of Assets | 316 | 227
Derivative Liability, Fair Value, Gross Liability | 256 | 62
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 0
Carrying Value / Fair Value of Assets | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 550 | 693
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 0
Carrying Value / Fair Value of Assets | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 139 | 162
Not Designated as Hedging Instrument | Synthetic Guaranteed Investment Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 17,485 | 16,143
Carrying Value / Fair Value of Assets | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 0 | 0
Not Designated as Hedging Instrument | Interest Rate Swaption |  |
Derivative [Line Items] |  |
Notional Amount | 5,312 | 0
Carrying Value / Fair Value of Assets | 40 | 0
Derivative Liability, Fair Value, Gross Liability | 0 | 0
Not Designated as Hedging Instrument | Total Return Swap |  |
Derivative [Line Items] |  |
Notional Amount | 500 | 0
Carrying Value / Fair Value of Assets | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 2 | 0
Designated As Hedging Instrument |  |
Derivative [Line Items] |  |
Notional Amount | 2,884 | 2,959
Carrying Value / Fair Value of Assets | 71 | 33
Derivative Liability, Fair Value, Gross Liability | 256 | 45
Designated As Hedging Instrument | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 1,335 | 941
Carrying Value / Fair Value of Assets | 4 | 4
Derivative Liability, Fair Value, Gross Liability | 140 | 33
Designated As Hedging Instrument | Foreign Currency Forwards |  |
Derivative [Line Items] |  |
Notional Amount |  | 1,320
Carrying Value / Fair Value of Assets |  | 14
Derivative Liability, Fair Value, Gross Liability |  | 11
Designated As Hedging Instrument | Currency Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 114 | 153
Carrying Value / Fair Value of Assets | 0 | 1
Derivative Liability, Fair Value, Gross Liability | 7 | 0
Designated As Hedging Instrument | Purchase Commitment |  |
Derivative [Line Items] |  |
Notional Amount |  | 545
Carrying Value / Fair Value of Assets |  | 14
Derivative Liability, Fair Value, Gross Liability |  | $ 1
Designated As Hedging Instrument | Forward Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 1,028 |
Carrying Value / Fair Value of Assets | 67 |
Derivative Liability, Fair Value, Gross Liability | 0 |
Designated As Hedging Instrument | Other Contract |  |
Derivative [Line Items] |  |
Notional Amount | 407 |
Carrying Value / Fair Value of Assets | 0 |
Derivative Liability, Fair Value, Gross Liability | $ 109 |

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