Deferred Policy Acquisition Costs - Rollforward of DAC (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 12,857	$ 13,001
Capitalization	3,024	2,577
Amortization expense	(2,483)	(2,253)
Other, including foreign exchange*	(696)	(207)
Balance, end of year	12,702	13,118
Assets held-for-sale
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Other, including foreign exchange*	712
General Insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	2,310	2,428
Capitalization	2,385	2,046
Amortization expense	(1,965)	(1,759)
Other, including foreign exchange*	(734)	(130)
Balance, end of year	1,996	2,585
Individual Retirement
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	4,597	4,553
Capitalization	358	281
Amortization expense	(272)	(242)
Other, including foreign exchange*	0	0
Balance, end of year	4,683	4,592
Group Retirement
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	1,060	1,078
Capitalization	37	29
Amortization expense	(41)	(39)
Other, including foreign exchange*	0	0
Balance, end of year	1,056	1,068
Life Insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	4,839	4,904
Capitalization	234	215
Amortization expense	(201)	(210)
Other, including foreign exchange*	38	(77)
Balance, end of year	4,910	4,832
Institutional Markets
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	51	38
Capitalization	10	6
Amortization expense	(4)	(3)
Other, including foreign exchange*	0	0
Balance, end of year	$ 57	$ 41