Segment Information - Schedule of continuing operations by operating segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues	$ 12,774	$ 13,998	$ 36,976	$ 42,605
Adjusted Pre-tax Income (Loss)	3,568	3,904	5,204	13,543
Net Investment Income	3,556	2,668	10,660	8,509
Interest expense	280	282	865	811
Amortization of deferred policy acquisition costs	1,190	1,170	3,673	3,423
Changes in fair value of securities used to hedge guaranteed living benefits, Adjusted Revenues	13	14	40	41
Changes in fair value of securities used to hedge guaranteed living benefits	(6)	6	(12)	29
Change in the fair value of market risk benefits, net	418	435	484	713
Changes in benefit reserves related to net realized gains (losses)	2	2	7	11
Changes in the fair value of equity securities	40	16	134	(41)
Other income (expense) - net	(7)	(7)	(26)	(23)
Gain (loss) on extinguishment of debt	(21)	0	(21)	(299)
Net realized gains (losses)	1,081	2,572	(1,125)	8,783
Net realized gains, adjusted revenues	114	845	(1,053)	1,039
Net realized gains, adjusted pre-tax income (loss)	133	846	(1,023)	1,055
Net gain on divestitures and other	101	6	142	45
Non-operating litigation reserves and settlements, adjustment to revenue	0	8	1	46
Non-operating litigation reserves and settlements, pre-tax income (loss)	0	3	0	41
Favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements	75	62	112	206
Net loss reserve discount charge	(5)	(10)	(85)	(4)
Integration and transaction costs associated with acquiring or divesting businesses	(65)	(52)	(196)	(136)
Restructuring and other costs	(132)	(147)	(402)	(415)
Non-recurring costs related to regulatory or accounting changes	(11)	(9)	(36)	(22)
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	(8)	0	(75)	0
Fortitude Re funds withheld assets
Segment Reporting Information [Line Items]
Net Investment Income	264	155	1,001	634
Net realized gains (losses)	(227)	(86)	(396)	(312)
Fortitude Re funds withheld embedded derivative
Segment Reporting Information [Line Items]
Net realized gains (losses)	1,137	1,757	152	7,851
Total
Segment Reporting Information [Line Items]
Revenues	11,440	11,296	37,119	33,370
Adjusted Pre-tax Income (Loss)	1,873	920	5,406	4,187
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Revenues	82	(26)	247	203
Adjusted Pre-tax Income (Loss)	(465)	(614)	(1,376)	(1,496)
Other Operations before consolidation and eliminations
Segment Reporting Information [Line Items]
Revenues	56	126	299	627
Adjusted Pre-tax Income (Loss)	(468)	(467)	(1,325)	(1,086)
Consolidation and eliminations
Segment Reporting Information [Line Items]
Revenues	26	(152)	(52)	(424)
Adjusted Pre-tax Income (Loss)	3	(147)	(51)	(410)
General Insurance | Reportable Segments
Segment Reporting Information [Line Items]
Revenues	7,178	6,989	21,405	20,854
Adjusted Pre-tax Income (Loss)	1,367	750	3,934	3,218
General Insurance | Reportable Segments | North America
Segment Reporting Information [Line Items]
Revenues	3,079	3,140	9,254	8,901
Adjusted Pre-tax Income (Loss)	235	(439)	886	223
General Insurance | Reportable Segments | International
Segment Reporting Information [Line Items]
Revenues	3,343	3,267	9,924	10,148
Adjusted Pre-tax Income (Loss)	376	607	821	1,190
General Insurance | Reportable Segments | Net investment income
Segment Reporting Information [Line Items]
Revenues	756	582	2,227	1,805
Adjusted Pre-tax Income (Loss)	756	582	2,227	1,805
Life and Retirement | Reportable Segments
Segment Reporting Information [Line Items]
Revenues	4,180	4,333	15,467	12,313
Adjusted Pre-tax Income (Loss)	971	784	2,848	2,465
Life and Retirement | Reportable Segments | Individual Retirement
Segment Reporting Information [Line Items]
Revenues	1,560	1,301	4,622	3,915
Adjusted Pre-tax Income (Loss)	572	377	1,690	1,213
Life and Retirement | Reportable Segments | Group Retirement
Segment Reporting Information [Line Items]
Revenues	688	672	2,061	2,078
Adjusted Pre-tax Income (Loss)	191	193	579	614
Life and Retirement | Reportable Segments | Life Insurance
Segment Reporting Information [Line Items]
Revenues	1,276	1,250	3,805	3,875
Adjusted Pre-tax Income (Loss)	133	131	293	364
Life and Retirement | Reportable Segments | Institutional Markets
Segment Reporting Information [Line Items]
Revenues	656	1,110	4,979	2,445
Adjusted Pre-tax Income (Loss)	$ 75	$ 83	$ 286	$ 274