Segment Information - Schedule of Identifiable assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 526,634	$ 596,112
Capital Expenditures	210	343
General Insurance | Reportable Subsegments
Segment Reporting Information [Line Items]
Total assets	147,102	159,000
Capital Expenditures	68	76
Life and Retirement | Reportable Subsegments
Segment Reporting Information [Line Items]
Total assets	356,623	406,104
Capital Expenditures	102	62
Other Operations before consolidation and eliminations | Reportable Subsegments
Segment Reporting Information [Line Items]
Total assets	22,909	31,008
Capital Expenditures	$ 40	$ 205