AOCI - Components and Changes in AOCI (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-period	$ 8,269
Balance as of end-of-period	9,548	$ 7,949
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	(6,239)	(5,188)
Income tax benefit (expense)	(268)	194
Reclassification adjustment for gains (losses) included in net income (loss)	(117)	(137)
Income tax benefit (expense)	25	29
Balance as of end-of-period	(5,146)	(5,828)
Unrealized holding gains (losses) arising during the year
Change in our unrealized gain on derivative instruments in accumulated OCI
Changes arising during the year	1,083	(1,971)
Change in foreign currency exchange rate adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Changes arising during the year	483	(117)
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	(297)	1,146
Unrealized Gain (Loss) on Derivative Instruments
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-period	638	375
Income tax benefit (expense)	57	(62)
Reclassification adjustment for gains (losses) included in net income (loss)	39	42
Income tax benefit (expense)	(8)	(9)
Balance as of end-of-period	396	575
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	206	178
Change in foreign currency exchange rate adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Changes arising during the year	(474)	117
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	146	1,070
Adjustment arising during the year	(42)	(841)
Income tax benefit (expense)	10	180
Balance as of end-of-period	114	409
Policyholder Liability Discount Rate Remeasurement Gain (Loss)
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-period	744	587
Adjustment arising during the year	(222)	264
Income tax benefit (expense)	47	(56)
Balance as of end-of-period	569	795
Foreign Currency Translation Adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-period	(29)	(26)
Foreign currency translation adjustment arising during the year	15	(1)
Balance as of end-of-period	(14)	(27)
Funded Status of Employee Benefit Plans
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-period	(296)	(294)
Adjustment arising during the year	(15)	1
Balance as of end-of-period	$ (311)	$ (293)