Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 30,253	$ 30,125
Ending Balance	28,796	32,423
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(19,242)	(22,621)
OCI before reclassifications	(1,062)	3,979
Deferred income tax benefit (expense)	109	(867)
AOCI before reclassifications, net of income tax	(20,195)	(19,509)
Amounts reclassified from AOCI	534	464
Deferred income tax benefit (expense)	(110)	(102)
Amounts reclassified from AOCI, net of income tax	424	362
Ending Balance	(19,771)	(19,147)
Unrealized Investment Gains (Losses), Net of Related Offsets
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(14,506)	(22,646)
OCI before reclassifications	(3,119)	7,583
Deferred income tax benefit (expense)	699	(1,728)
AOCI before reclassifications, net of income tax	(16,926)	(16,791)
Amounts reclassified from AOCI	145	566
Deferred income tax benefit (expense)	(32)	(129)
Amounts reclassified from AOCI, net of income tax	113	437
Ending Balance	(16,813)	(16,354)
Unrealized Gains (Losses) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	183	1,557
OCI before reclassifications	(341)	387
Deferred income tax benefit (expense)	76	(97)
AOCI before reclassifications, net of income tax	(82)	1,847
Amounts reclassified from AOCI	357	(132)
Deferred income tax benefit (expense)	(73)	33
Amounts reclassified from AOCI, net of income tax	284	(99)
Ending Balance	202	1,748
Future Policy Benefits Discount Rate Remeasurement Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	2,658	6,115
OCI before reclassifications	2,711	(4,369)
Deferred income tax benefit (expense)	(596)	1,002
AOCI before reclassifications, net of income tax	4,773	2,748
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Ending Balance	4,773	2,748
Market Risk Benefits Instrument-Specific Credit Risk Remeasurement Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	27	107
OCI before reclassifications	(94)	100
Deferred income tax benefit (expense)	20	(21)
AOCI before reclassifications, net of income tax	(47)	186
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Ending Balance	(47)	186
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(6,158)	(6,377)
OCI before reclassifications	(217)	282
Deferred income tax benefit (expense)	(90)	(24)
AOCI before reclassifications, net of income tax	(6,465)	(6,119)
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Ending Balance	(6,465)	(6,119)
Defined Benefit Plans Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(1,446)	(1,377)
OCI before reclassifications	(2)	(4)
Deferred income tax benefit (expense)	0	1
AOCI before reclassifications, net of income tax	(1,448)	(1,380)
Amounts reclassified from AOCI	32	30
Deferred income tax benefit (expense)	(5)	(6)
Amounts reclassified from AOCI, net of income tax	27	24
Ending Balance	$ (1,421)	$ (1,356)