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Derivatives (Derivatives Pertaining to Hedged Items) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | $ (575) | $ (54) | $ (592) | $ (3,983)
Net Derivative Gains (Losses) Recognized for Hedged Items | 10 | (7) |  |
Net Investment Income | 1,059 | 1,151 |  |
Amount of Gains (Losses) Deferred in AOCI | (40) | 19 |  |
Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 10 | (7) |  |
Amount of Gains (Losses) Deferred in AOCI | 0 | 0 |  |
Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | (40) | 19 |  |
Net Derivative Gains (Losses) Recognized for Derivatives |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (585) | (46) |  |
Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (584) | (47) |  |
Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (1) | 1 |  |
Net Investment Income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 15 | 12 |  |
Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 0 | 0 |  |
Net Investment Income | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 15 | 12 |  |
Interest rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | 0 | 0 |  |
Interest rate | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | 2 | (21) |  |
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | 610 | (1,131) |  |
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | 0 | 1 |  |
Interest rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 0 | 0 |  |
Interest rate | Net Investment Income | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 1 | 1 |  |
Foreign currency exchange rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 10 | (7) |  |
Amount of Gains (Losses) Deferred in AOCI | 0 | 0 |  |
Foreign currency exchange rate | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | (42) | 40 |  |
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (5) | 20 |  |
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (1) | 0 |  |
Foreign currency exchange rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 0 | 0 |  |
Foreign currency exchange rate | Net Investment Income | Cash flow hedges: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 14 | 11 |  |
Credit | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | 0 | 0 |  |
Credit | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | 10 | (7) |  |
Credit | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 0 | 0 |  |
Equity market | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | 0 | 0 |  |
Equity market | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (109) | 308 |  |
Equity market | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | 0 | 0 |  |
Embedded | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Hedged Items | 0 | 0 |  |
Amount of Gains (Losses) Deferred in AOCI | 0 | 0 |  |
Embedded | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Derivative Gains (Losses) Recognized for Derivatives | (1,090) | 763 |  |
Embedded | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net Investment Income | $ 0 | $ 0 |  |

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- Definition The current period gain (loss) recognized in other comprehensive income related to the effective portion of derivatives designated in cash flow hedges. + References No definition available. + Details
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