Deferred Policy Acquisition Costs - Rollforward of DAC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 2,065	$ 2,117
Capitalization	750	882
Amortization expense	(825)	(838)
Other, including foreign exchange	19	(57)
Balance, end of year	$ 2,009	$ 2,104