Shares and Stockholders’ Equity - Components and Changes in AOCI (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 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	10,452	$ 9,013
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)	(463)	(276)
Reclassification adjustment for gains (losses) included in net income (loss)	(139)	(163)
Income tax benefit (expense)	29	34
Balance as of end-of-period	(4,402)	(4,038)
Unrealized holding gains (losses) arising during the year
Change in our unrealized gain on derivative instruments in accumulated OCI
Changes arising during the year	2,263	1,555
Change in foreign currency exchange rate adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Changes arising during the year	441	124
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	(514)	(382)
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)	33	(39)
Reclassification adjustment for gains (losses) included in net income (loss)	(54)	(60)
Income tax benefit (expense)	11	13
Balance as of end-of-period	472	473
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	277	305
Change in foreign currency exchange rate adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Changes arising during the year	(433)	(121)
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	(260)	(367)
Income tax benefit (expense)	56	78
Balance as of end-of-period	(58)	781
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	(342)	(209)
Income tax benefit (expense)	72	44
Balance as of end-of-period	474	422
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	11	8
Balance as of end-of-period	(18)	(18)
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	(11)	(8)
Balance as of end-of-period	$ (307)	$ (302)