Shares and Stockholders' Equity - Components and Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 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	$ 466	$ (3,306)	664	$ 603
Balance as of end-of-period	10,783	7,318	10,783	7,318
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)			(253)	478
Reclassification adjustment for gains (losses) included in net income (loss)			(9)	(3,704)
Income tax benefit (expense)			2	778
Balance as of end-of-period	(2,583)	(7,433)	(2,583)	(7,433)
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			1,523	(2,781)
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			125	(21)
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			(453)	491
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)			(20)	(9)
Reclassification adjustment for gains (losses) included in net income (loss)			40	46
Income tax benefit (expense)			(8)	(10)
Balance as of end-of-period	289	296	289	296
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			213	10
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			(121)	30
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			(367)	(944)
Income tax benefit (expense)			79	202
Balance as of end-of-period	781	997	781	997
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			(46)	326
Income tax benefit (expense)			10	(69)
Balance as of end-of-period	609	1,047	609	1,047
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			(1)	0
Balance as of end-of-period	(1)	0	(1)	0
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)