Schedule VI (Details) - Consolidated Property and Casualty Insurance Entity [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Supplementary Information Concerning Property-Casualty Insurance Operations
Deferred acquisition costs	$ 2,836	$ 2,542	$ 2,358
Claims and claim adjustment expense reserves	58,643	56,897	54,510
Discount from reserves for unpaid claims	1,124	1,146	1,138
Unearned premiums	18,240	16,469	15,222
Earned premiums	33,763	30,855	29,044
Net investment income	2,562	3,033	2,227
Claims and claim adjustment expenses incurred related to current year	23,308	20,698	19,285
Claims and claim adjustment expenses incurred related to prior year	(537)	(484)	(267)
Amortization of deferred acquisition costs	5,515	5,043	4,773
Paid claims and claim adjustment expenses	20,351	17,871	16,589
Net written premiums	$ 35,414	$ 31,959	$ 29,732