Deferred Policy Acquisition Costs - Rollforward of DAC (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 2,065	$ 2,117
Capitalization	1,667	1,803
Amortization expense	(1,672)	(1,680)
Other, including foreign exchange	91	(117)
Balance, end of year	$ 2,151	$ 2,123