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Shares and Stockholders' Equity - Components and Changes in AOCI (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | $ 6,893 |
Balance as of end-of-period | 7,949 | $ 5,819
Unrealized Gain (Loss) on Fixed Maturity AFS Securities and Certain |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | (5,188) | (8,916)
Income tax benefit (expense) | 194 | (199)
Reclassification adjustment for gains (losses) included in net income (loss) | (137) | (707)
Income tax benefit (expense) | 29 | 148
Balance as of end-of-period | (5,828) | (7,715)
Unrealized holding gains (losses) arising during the year |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Changes arising during the year | (1,971) | 803
Change in foreign currency exchange rate adjustment |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Changes arising during the year | (117) | 120
Change in future contract benefits and policyholder account balances, net of reinsurance |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Changes arising during the year | 1,146 | (82)
Unrealized Gain (Loss) on Derivative Instruments |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | 375 | 388
Income tax benefit (expense) | (62) | (26)
Reclassification adjustment for gains (losses) included in net income (loss) | 42 | 43
Income tax benefit (expense) | (9) | (9)
Balance as of end-of-period | 575 | 448
Unrealized holding gains (losses) arising during the period - cash flow hedges |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Changes arising during the year | 178 | 230
Change in foreign currency exchange rate adjustment |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Changes arising during the year | 117 | (110)
Market Risk Benefit Non-Performance Risk Gain (Loss) |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | 1,070 | 1,741
Adjustment arising during the year | (841) | 129
Income tax benefit (expense) | 180 | (28)
Balance as of end-of-period | 409 | 1,842
Policyholder Liability Discount Rate Remeasurement Gain (Loss) |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | 587 | 747
Adjustment arising during the year | 264 | (116)
Income tax benefit (expense) | (56) | 26
Balance as of end-of-period | 795 | 657
Foreign Currency Translation Adjustment |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | (26) | (34)
Foreign currency translation adjustment arising during the year | (1) | 8
Balance as of end-of-period | (27) | (26)
Funded Status of Employee Benefit Plans |  |
Change in our unrealized gain on derivative instruments in accumulated OCI |  |
Balance as of beginning-of-period | (294) | (278)
Adjustment arising during the year | 1 | (32)
Balance as of end-of-period | $ (293) | $ (310)

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