Segment Information - Schedule of continuing operations by operating segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenues	$ 13,218	$ 13,663	$ 24,202	$ 28,607
Adjusted Pre-tax Income (Loss)	1,867	3,925	1,636	9,639
Net Investment Income	3,571	2,604	7,104	5,841
Interest expense	278	266	585	529
Amortization of deferred policy acquisition costs	1,190	1,116	2,483	2,253
Changes in fair value of securities used to hedge guaranteed living benefits, Adjusted Revenues	14	13	27	27
Changes in fair value of securities used to hedge guaranteed living benefits	(3)	10	(6)	23
Change in the fair value of market risk benefits, net	262	45	66	278
Changes in benefit reserves related to net realized gains (losses)	(1)	7	5	9
Changes in the fair value of equity securities	43	(30)	94	(57)
Other income (expense) - net	(12)	(9)	(19)	(16)
Loss on extinguishment of debt	0	(299)	0	(299)
Net realized gains (losses)	(297)	2,632	(2,206)	6,211
Net realized gains, adjusted revenues	(395)	(147)	(1,167)	194
Net realized gains, adjusted pre-tax income (loss)	(390)	(140)	(1,156)	209
Net gain (loss) on divestitures and other	43	(1)	41	39
Non-operating litigation reserves and settlements, adjustment to revenue	0	4	1	38
Non-operating litigation reserves and settlements, pre-tax income (loss)	(1)	4	0	38
Favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements	18	144	37	144
Net loss reserve discount charge	(16)	(14)	(80)	6
Integration and transaction costs associated with acquiring or divesting businesses	(79)	(38)	(131)	(84)
Restructuring and other costs	(153)	(175)	(270)	(268)
Non-recurring costs related to regulatory or accounting changes	(12)	(9)	(25)	(13)
Net impact from elimination of international reporting lag, adjusted revenues			4
Net impact from elimination of international reporting lag, adjusted pre-tax income (loss)			12
Pension expense related to a one-time lump sum payment to former employees	(67)	0	(67)	0
Fortitude Re funds withheld assets
Segment Reporting Information [Line Items]
Net Investment Income	291	188	737	479
Net realized gains (losses)	(138)	(86)	(169)	(226)
Fortitude Re funds withheld embedded derivative
Segment Reporting Information [Line Items]
Net realized gains (losses)	180	2,776	(985)	6,094
Total
Segment Reporting Information [Line Items]
Revenues	13,235	10,954	25,679	22,074
Adjusted Pre-tax Income (Loss)	1,890	1,543	3,533	3,267
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Revenues	97	71	165	229
Adjusted Pre-tax Income (Loss)	(420)	(461)	(911)	(882)
Other Operations before consolidation and eliminations
Segment Reporting Information [Line Items]
Revenues	111	207	243	501
Adjusted Pre-tax Income (Loss)	(423)	(331)	(857)	(619)
Consolidation and eliminations
Segment Reporting Information [Line Items]
Revenues	(14)	(136)	(78)	(272)
Adjusted Pre-tax Income (Loss)	3	(130)	(54)	(263)
General Insurance | Reportable Segments
Segment Reporting Information [Line Items]
Revenues	7,222	6,844	14,227	13,865
Adjusted Pre-tax Income (Loss)	1,319	1,257	2,567	2,468
General Insurance | Reportable Segments | North America
Segment Reporting Information [Line Items]
Revenues	3,195	2,972	6,175	5,761
Adjusted Pre-tax Income (Loss)	352	406	651	662
General Insurance | Reportable Segments | International
Segment Reporting Information [Line Items]
Revenues	3,302	3,414	6,581	6,881
Adjusted Pre-tax Income (Loss)	242	393	445	583
General Insurance | Reportable Segments | Net investment income
Segment Reporting Information [Line Items]
Revenues	725	458	1,471	1,223
Adjusted Pre-tax Income (Loss)	725	458	1,471	1,223
Life and Retirement | Reportable Segments
Segment Reporting Information [Line Items]
Revenues	5,916	4,039	11,287	7,980
Adjusted Pre-tax Income (Loss)	991	747	1,877	1,681
Life and Retirement | Reportable Segments | Individual Retirement
Segment Reporting Information [Line Items]
Revenues	1,578	1,267	3,062	2,614
Adjusted Pre-tax Income (Loss)	585	370	1,118	836
Life and Retirement | Reportable Segments | Group Retirement
Segment Reporting Information [Line Items]
Revenues	690	672	1,373	1,406
Adjusted Pre-tax Income (Loss)	201	180	388	421
Life and Retirement | Reportable Segments | Life Insurance
Segment Reporting Information [Line Items]
Revenues	1,280	1,314	2,529	2,625
Adjusted Pre-tax Income (Loss)	78	120	160	233
Life and Retirement | Reportable Segments | Institutional Markets
Segment Reporting Information [Line Items]
Revenues	2,368	786	4,323	1,335
Adjusted Pre-tax Income (Loss)	$ 127	$ 77	$ 211	$ 191