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Equity (Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Realized investment gains (losses), net | [1] | $ (3,615) | [2] | $ (4,507) | [3],[4] | $ 2,115 | [3],[4]
Other Income | [1] | $ 4,065 |  | $ 608 | [3] | $ 2,964 | [3]
Amortization of defined benefit items: |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax |  | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax |  | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax |
Total Foreign Currency Translation Adjustment |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | $ 18 |  | $ (15) |  | $ 65 |
Net Unrealized Investment Gains (Losses) |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | (1,143) |  | (586) |  | 2,486 |
Total amortization of defined benefit pension items |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | (71) |  | (157) |  | (264) |
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | (1,196) |  | (758) |  | 2,287 |
Amounts reclassified from AOCI |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Realized investment gains (losses), net |  | 18 |  | (15) |  | 2 |
Other Income |  | 0 |  | 0 |  | 63 |
Amortization of defined benefit items: |  |  |  |  |  |  |
Prior service cost |  | 8 |  | 9 |  | (3) |
Actuarial gain (loss) |  | (79) |  | (166) |  | (261) |
Amounts reclassified from AOCI | Total Foreign Currency Translation Adjustment |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | 18 |  | (15) |  | 65 |
Amounts reclassified from AOCI | Net Unrealized Investment Gains (Losses) |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | (1,143) |  | (586) |  | 2,486 |
Amounts reclassified from AOCI | Total amortization of defined benefit pension items |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | (71) |  | (157) |  | (264) |
Amounts reclassified from AOCI | Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Amounts reclassified from AOCI |  | (1,196) |  | (758) |  | 2,287 |
Amounts reclassified from AOCI | Net unrealized investment gains (losses) on available-for-sale securities |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Net unrealized investment gains (losses) |  | (1,311) |  | (1,487) |  | 1,939 |
Amounts reclassified from AOCI | Interest Rate | Cash Flow Hedges |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Net unrealized investment gains (losses) |  | (38) |  | (7) |  | 0 |
Amounts reclassified from AOCI | Currency | Cash Flow Hedges |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Net unrealized investment gains (losses) |  | 14 |  | 15 |  | (4) |
Amounts reclassified from AOCI | Currency | Fair value hedges |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Net unrealized investment gains (losses) |  | (8) |  | (4) |  | (6) |
Amounts reclassified from AOCI | Currency/Interest Rate | Cash Flow Hedges |  |  |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |
Net unrealized investment gains (losses) |  | $ 200 |  | $ 897 |  | $ 557 |
[1] | See Note 24 for additional information regarding related party transactions.
[2] | See Note 24 for additional information regarding related party transactions.
[3] | Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.
[4] | Prior period amounts adjusted for the adoption of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

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