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	$ 13,616	$ 13,395
Ending Balance	13,293	14,176
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(6,872)	(8,320)
OCI before reclassifications	(282)	2,050
Other Comprehensive Income (Loss) before Reclassifications, Tax	98	(429)
AOCI before reclassifications, net of income tax	(7,056)	(6,699)
Amounts reclassified from AOCI	421	(169)
Deferred income tax benefit (expense)	(93)	36
Amounts reclassified from AOCI, net of income tax	328	(133)
Ending Balance	(6,728)	(6,832)
Unrealized Investment Gains (Losses), Net of Related Offsets
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(6,495)	(11,161)
OCI before reclassifications	(1,924)	3,812
Other Comprehensive Income (Loss) before Reclassifications, Tax	443	(798)
AOCI before reclassifications, net of income tax	(7,976)	(8,147)
Amounts reclassified from AOCI	159	(25)
Deferred income tax benefit (expense)	(37)	5
Amounts reclassified from AOCI, net of income tax	122	(20)
Ending Balance	(7,854)	(8,167)
Unrealized Gains (Losses) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	705	1,557
OCI before reclassifications	(143)	159
Other Comprehensive Income (Loss) before Reclassifications, Tax	30	(33)
AOCI before reclassifications, net of income tax	592	1,683
Amounts reclassified from AOCI	259	(146)
Deferred income tax benefit (expense)	(55)	31
Amounts reclassified from AOCI, net of income tax	204	(115)
Ending Balance	796	1,568
Future Policy Benefits Discount Rate Remeasurement Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(807)	1,529
OCI before reclassifications	1,804	(2,068)
Other Comprehensive Income (Loss) before Reclassifications, Tax	(379)	433
AOCI before reclassifications, net of income tax	618	(106)
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	618	(106)
Market Risk Benefits Instrument-Specific Credit Risk Remeasurement Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	33	80
OCI before reclassifications	(58)	88
Other Comprehensive Income (Loss) before Reclassifications, Tax	12	(19)
AOCI before reclassifications, net of income tax	(13)	149
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	(13)	149
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(143)	(187)
OCI before reclassifications	39	60
Other Comprehensive Income (Loss) before Reclassifications, Tax	(8)	(12)
AOCI before reclassifications, net of income tax	(112)	(139)
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	(112)	(139)
Defined Benefit Plans Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(165)	(138)
OCI before reclassifications	0	(1)
Other Comprehensive Income (Loss) before Reclassifications, Tax	0	0
AOCI before reclassifications, net of income tax	(165)	(139)
Amounts reclassified from AOCI	3	2
Deferred income tax benefit (expense)	(1)	0
Amounts reclassified from AOCI, net of income tax	2	2
Ending Balance	$ (163)	$ (137)

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