Shares and Stockholders' Equity - Components and Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year			$ 10,507
Foreign currency translation adjustment arising during the period	$ 24	$ 1,296	198	$ 3,909
Balance as of end-of-period	11,029	10,401	11,029	10,401
Unrealized Gain (Loss) on Fixed Maturity AFS Securities and Certain Other Investments
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year			(3,532)	(8,526)
Income tax benefit (expense)			(131)	(478)
Reclassification adjustment for gains (losses) included in net income (loss)			(106)	(2,722)
Income tax benefit (expense)			22	572
Balance as of end-of-period	(2,970)	(4,680)	(2,970)	(4,680)
Unrealized holding gains (losses) arising during the period
Change in our unrealized gain on derivative instruments in accumulated OCI
Change in foreign currency exchange rate adjustment			(1,489)	1,199
Change in foreign currency exchange rate adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Change in foreign currency exchange rate adjustment			(117)	119
Change in future contract benefits and policyholder account balances, net of reinsurance
Change in our unrealized gain on derivative instruments in accumulated OCI
Change in foreign currency exchange rate adjustment			2,215	856
Unrealized Gain (Loss) on Derivative Instruments
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year			249	301
Income tax benefit (expense)			(35)	(20)
Reclassification adjustment for gains (losses) included in net income (loss)			27	30
Income tax benefit (expense)			(6)	(6)
Balance as of end-of-period	356	351	356	351
Unrealized holding gains (losses) arising during the period
Change in our unrealized gain on derivative instruments in accumulated OCI
Change in foreign currency exchange rate adjustment			46	204
Change in foreign currency exchange rate adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Change in foreign currency exchange rate adjustment			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-year			1,069	1,739
Adjustment arising during the year			(841)	129
Income tax benefit (expense)			180	(27)
Balance as of end-of-period	408	1,841	408	1,841
Policyholder Liability Discount Rate Remeasurement Gain (Loss)
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year			645	790
Adjustment arising during the year			241	(114)
Income tax benefit (expense)			(51)	26
Balance as of end-of-period	835	702	835	702
Foreign Currency Translation Adjustment
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year			0	0
Foreign currency translation adjustment arising during the period			0	(1)
Balance as of end-of-period	0	(1)	0	(1)
Funded Status of Employee Benefit Plans
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year			(16)	(17)
Balance as of end-of-period	$ (16)	$ (17)	$ (16)	$ (17)