Segment Information - Schedule of continuing operations by operating segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 46,802	$ 54,450	$ 52,157
Adjusted Pre-tax Income (Loss)	3,858	14,299	13,347
Net Investment Income	14,592	11,767	14,612
Interest expense	1,136	1,125	1,305
Amortization of deferred policy acquisition costs	4,808	4,557	4,524
Changes in fair value of securities used to hedge guaranteed living benefits, Adjusted Revenues	55	55	60
Changes in fair value of securities used to hedge guaranteed living benefits	(16)	30	61
Change in the fair value of market risk benefits, net	(2)	958	447
Changes in benefit reserves related to net realized gains (losses)	6	14	(15)
Changes in the fair value of equity securities	94	(53)	(237)
Other income (expense) - net	(27)	(29)	(24)
Other income (expense) - net, investment income	31	28	33
Other income (expense) - net, interest expense	31	28	33
Gain (loss) on extinguishment of debt	37	(303)	(389)
Net realized gains (losses)	(4,608)	7,064	2,271
Net realized gains, adjusted revenues	(2,536)	(195)	1,705
Net realized gains, adjusted pre-tax income (loss)	(2,496)	(173)	1,744
Net gain (loss) on divestitures and other	643	(82)	3,044
Non-operating litigation reserves and settlements, adjustment to revenue	1	49	0
Non-operating litigation reserves and settlements, pre-tax income (loss)	(1)	41	(3)
Favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements	62	160	186
Net loss reserve discount benefit (charge)	(195)	703	193
Pension expense related to a one-time lump sum payment to former employees	(84)	(60)	(34)
Integration and transaction costs associated with acquiring or divesting businesses	(252)	(194)	(83)
Restructuring and other costs	(553)	(570)	(433)
Non-recurring costs related to regulatory or accounting changes	(40)	(37)	(68)
Net impact from elimination of international reporting lag, adjusted revenues	4	978
Net impact from elimination of international reporting lag, net investment income	1	41
Net impact from elimination of international reporting lag, amortization Of DAC	124
Net impact from elimination of international reporting lag, adjusted pre-tax income (loss)	12	127
Fortitude Re funds withheld assets
Segment Reporting Information [Line Items]
Net Investment Income	1,544	943	1,971
Net realized gains (losses)	(295)	(486)	1,003
Fortitude Re funds withheld embedded derivative
Segment Reporting Information [Line Items]
Net realized gains (losses)	(2,007)	7,481	(603)
Total
Segment Reporting Information [Line Items]
Revenues	49,969	45,707	48,282
Adjusted Pre-tax Income (Loss)	7,401	5,800	6,563
Net Investment Income	13,094	10,997	12,941
Interest expense	1,105	1,098	1,285
Amortization of deferred policy acquisition costs	4,684	4,557	4,524
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Revenues	375	392	347
Adjusted Pre-tax Income (Loss)	(1,775)	(1,947)	(2,350)
Net Investment Income	286	268	116
Interest expense	1,101	1,075	1,155
Amortization of deferred policy acquisition costs		3	36
Other Operations before consolidation and eliminations
Segment Reporting Information [Line Items]
Revenues	381	827	1,338
Adjusted Pre-tax Income (Loss)	(1,765)	(1,542)	(1,418)
Net Investment Income	287	714	1,112
Interest expense	1,107	1,131	1,220
Amortization of deferred policy acquisition costs		5	37
Consolidation and eliminations
Segment Reporting Information [Line Items]
Revenues	(6)	(435)	(991)
Adjusted Pre-tax Income (Loss)	(10)	(405)	(932)
Net Investment Income	(1)	(446)	(996)
Interest expense	(6)	(56)	(65)
Amortization of deferred policy acquisition costs		(2)	(1)
General Insurance | Reportable Segments
Segment Reporting Information [Line Items]
Revenues	28,113	27,722	28,361
Adjusted Pre-tax Income (Loss)	5,371	4,430	4,359
Net Investment Income	3,022	2,382	3,304
Amortization of deferred policy acquisition costs	3,623	3,533	3,530
General Insurance | Reportable Segments | North America
Segment Reporting Information [Line Items]
Revenues	11,921	12,071	10,989
Adjusted Pre-tax Income (Loss)	1,207	648	(47)
Amortization of deferred policy acquisition costs	1,671	1,585	1,333
General Insurance | Reportable Segments | International
Segment Reporting Information [Line Items]
Revenues	13,170	13,269	14,068
Adjusted Pre-tax Income (Loss)	1,142	1,400	1,102
Amortization of deferred policy acquisition costs	1,952	1,948	2,197
General Insurance | Reportable Segments | Net investment income
Segment Reporting Information [Line Items]
Revenues	3,022	2,382	3,304
Adjusted Pre-tax Income (Loss)	3,022	2,382	3,304
Net Investment Income	3,022	2,382	3,304
Amortization of deferred policy acquisition costs		0	0
Life and Retirement | Reportable Segments
Segment Reporting Information [Line Items]
Revenues	21,481	17,593	19,574
Adjusted Pre-tax Income (Loss)	3,805	3,317	4,554
Net Investment Income	9,786	8,347	9,521
Interest expense	4	23	130
Amortization of deferred policy acquisition costs	1,061	1,021	958
Life and Retirement | Reportable Segments | Individual Retirement
Segment Reporting Information [Line Items]
Revenues	6,264	5,325	5,922
Adjusted Pre-tax Income (Loss)	2,310	1,676	2,297
Net Investment Income	4,917	3,898	4,338
Interest expense	2	11	61
Amortization of deferred policy acquisition costs	567	519	447
Life and Retirement | Reportable Segments | Group Retirement
Segment Reporting Information [Line Items]
Revenues	2,734	2,744	3,249
Adjusted Pre-tax Income (Loss)	758	786	1,258
Net Investment Income	1,999	2,005	2,410
Interest expense	1	6	35
Amortization of deferred policy acquisition costs	82	80	78
Life and Retirement | Reportable Segments | Life Insurance
Segment Reporting Information [Line Items]
Revenues	5,092	5,364	5,286
Adjusted Pre-tax Income (Loss)	358	521	453
Net Investment Income	1,283	1,393	1,619
Interest expense		4	25
Amortization of deferred policy acquisition costs	403	415	427
Life and Retirement | Reportable Segments | Institutional Markets
Segment Reporting Information [Line Items]
Revenues	7,391	4,160	5,117
Adjusted Pre-tax Income (Loss)	379	334	546
Net Investment Income	1,587	1,051	1,154
Interest expense	1	2	9
Amortization of deferred policy acquisition costs	$ 9	$ 7	$ 6