Business, Basis of Presentation and Summary of Significant Accounting Policies - Transition Table - SOCI (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)	$ 614	$ 495	$ 408	$ 85	$ 1,581	$ 1,167	$ 915	$ 1,639	$ 1,602	$ 5,302	$ 6,876
Change in Gross Unrealized Temporary Loss									10,325	(56,497)	(12,840)
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, before Tax									(4,361)	31,804	10,102
OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments, before Tax									(102)	(219)	257
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax									(1,811)	(85)	137
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax									296	(1,238)	(1,266)
Other Comprehensive Income (Loss), before Tax									4,259	(25,956)	(3,282)
Other Comprehensive Income (Loss), Tax									(898)	5,779	519
Other Comprehensive Income (Loss), Net of Tax									3,361	(20,177)	(2,763)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									4,963	(14,875)	4,113
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									6	11	24
Comprehensive income (loss)									$ 4,957	(14,886)	4,089
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)										2,558	6,575
Change in Gross Unrealized Temporary Loss										(47,831)	(8,171)
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, before Tax										0	0
OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments, before Tax										0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax										(1,242)	(1,306)
Other Comprehensive Income (Loss), before Tax										(48,879)	(9,012)
Other Comprehensive Income (Loss), Tax										10,871	1,862
Other Comprehensive Income (Loss), Net of Tax										(38,008)	(7,150)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest										(35,450)	(575)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest										13	24
Comprehensive income (loss)										(35,463)	(599)
Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)										2,744	301
Change in Gross Unrealized Temporary Loss										(8,666)	(4,669)
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, before Tax										31,804	10,102
OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments, before Tax										(219)	257
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax										4	40
Other Comprehensive Income (Loss), before Tax										22,923	5,730
Other Comprehensive Income (Loss), Tax										(5,092)	(1,343)
Other Comprehensive Income (Loss), Net of Tax										17,831	4,387
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest										20,575	4,688
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest										(2)	0
Comprehensive income (loss)										$ 20,577	$ 4,688