Segment Information - Schedule of Continuing Operations by Operating Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Adjusted Revenues	$ 12,578	$ 10,984
Adjusted Pre-tax Income (Loss)	2,051	(231)
Changes in fair value of securities used to hedge guaranteed living benefits, adjusted revenues	17	13
Changes in fair value of securities used to hedge guaranteed living benefits, adjusted pre-tax income (loss)	(2)	(3)
Change in the fair value of market risk benefits, net	369	(196)
Changes in benefit reserves related to net realized gains (losses)	2	6
Changes in the fair value of equity securities	99	51
Net Investment Income	3,904	3,533
Other income (expense) - net	7	(7)
Net realized gains (losses)	(424)	(1,909)
Net realized gains, adjusted revenues	(313)	(772)
Net realized gains, adjusted pre-tax income (loss)	(307)	(766)
Net gain (loss) on divestitures and other	6	(2)
Non-operating litigation reserves and settlements, adjustment to revenue	0	1
Non-operating litigation reserves and settlements, pre-tax income (loss)	0	1
(Unfavorable) favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements	(2)	19
Net loss reserve discount charge	(76)	(64)
Integration and transaction costs associated with acquiring or divesting businesses	(64)	(52)
Restructuring and other costs	(114)	(117)
Non-recurring costs related to regulatory or accounting changes	(4)	(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
Fortitude Re funds withheld assets
Segment Reporting Information [Line Items]
Net Investment Income	369	446
Net realized gains (losses)	(179)	(31)
Fortitude Re funds withheld embedded derivative
Segment Reporting Information [Line Items]
Net realized gains (losses)	13	(1,165)
Total
Segment Reporting Information [Line Items]
Adjusted Revenues	12,565	12,444
Adjusted Pre-tax Income (Loss)	1,941	1,643
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Adjusted Revenues	96	68
Adjusted Pre-tax Income (Loss)	(408)	(491)
Other Operations before consolidation and eliminations
Segment Reporting Information [Line Items]
Adjusted Revenues	57	132
Adjusted Pre-tax Income (Loss)	(438)	(434)
Consolidation and eliminations
Segment Reporting Information [Line Items]
Adjusted Revenues	39	(64)
Adjusted Pre-tax Income (Loss)	30	(57)
General Insurance | Reportable Segments
Segment Reporting Information [Line Items]
Adjusted Revenues	6,548	7,005
Adjusted Pre-tax Income (Loss)	1,358	1,248
General Insurance | Reportable Segments | North America
Segment Reporting Information [Line Items]
Adjusted Revenues	2,502	2,980
Adjusted Pre-tax Income (Loss)	224	299
General Insurance | Reportable Segments | International
Segment Reporting Information [Line Items]
Adjusted Revenues	3,284	3,279
Adjusted Pre-tax Income (Loss)	372	203
General Insurance | Reportable Segments | Net investment income
Segment Reporting Information [Line Items]
Adjusted Revenues	762	746
Adjusted Pre-tax Income (Loss)	762	746
Life and Retirement | Reportable Segments
Segment Reporting Information [Line Items]
Adjusted Revenues	5,921	5,371
Adjusted Pre-tax Income (Loss)	991	886
Life and Retirement | Reportable Segments | Individual Retirement
Segment Reporting Information [Line Items]
Adjusted Revenues	1,686	1,484
Adjusted Pre-tax Income (Loss)	622	533
Life and Retirement | Reportable Segments | Group Retirement
Segment Reporting Information [Line Items]
Adjusted Revenues	689	683
Adjusted Pre-tax Income (Loss)	199	187
Life and Retirement | Reportable Segments | Life Insurance
Segment Reporting Information [Line Items]
Adjusted Revenues	1,214	1,249
Adjusted Pre-tax Income (Loss)	58	82
Life and Retirement | Reportable Segments | Institutional Markets
Segment Reporting Information [Line Items]
Adjusted Revenues	2,332	1,955
Adjusted Pre-tax Income (Loss)	$ 112	$ 84