Schedule III (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
Deferred Policy Acquisition Costs	$ 15,518	$ 10,514
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits	134,390	138,976
Unearned Premiums	18,338	19,313
Policy and Contract Claims	1,456	1,549
Premiums and Policy Fees	34,829	34,310	$ 31,440
Net Investment Income	11,767	14,612	13,631
Losses and Loss Expenses Incurred, Benefits	26,480	27,945	28,428
Amortization of Deferred Policy Acquisition Costs	4,970	4,573	4,211
Other Operating Expenses	9,195	8,790	8,396
Net Premium Written	26,760	26,417	23,456
General Insurance
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
Deferred Policy Acquisition Costs	2,307	2,428
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits	71,599	75,500
Unearned Premiums	18,253	19,209
Policy and Contract Claims	0	0
Premiums and Policy Fees	25,340	25,057	23,662
Net Investment Income	2,382	3,304	2,925
Losses and Loss Expenses Incurred, Benefits	15,407	16,097	16,803
Amortization of Deferred Policy Acquisition Costs	3,533	3,530	3,538
Other Operating Expenses	4,352	4,375	4,345
Net Premium Written	25,512	25,890	22,959
Life and Retirement
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
Deferred Policy Acquisition Costs	13,211	8,086
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits	57,266	57,749
Unearned Premiums	59	68
Policy and Contract Claims	1,309	1,460
Premiums and Policy Fees	8,480	9,080	7,498
Net Investment Income	8,347	9,521	8,881
Losses and Loss Expenses Incurred, Benefits	11,340	11,944	10,435
Amortization of Deferred Policy Acquisition Costs	1,130	973	632
Other Operating Expenses	2,504	2,636	2,522
Net Premium Written	0	0	0
Other Operations before consolidation and eliminations
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
Deferred Policy Acquisition Costs	0	0
Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits	5,525	5,727
Unearned Premiums	26	36
Policy and Contract Claims	147	89
Premiums and Policy Fees	1,009	173	280
Net Investment Income	1,038	1,787	1,825
Losses and Loss Expenses Incurred, Benefits	(267)	(96)	1,190
Amortization of Deferred Policy Acquisition Costs	307	70	41
Other Operating Expenses	2,339	1,779	1,529
Net Premium Written	$ 1,248	$ 527	$ 497