Insurance Claim Reserves (Tables)

9 Months Ended

Sep. 30, 2023

Insurance Loss Reserves [Abstract]

Claims and claim adjustment expense reserves [Table Text Block]

Claims and claim adjustment expense reserves were as follows:

(in millions)	September 30, 2023		December 31, 2022
Property-casualty	$	61,703	$	58,643
Accident and health	6		6
Total	$	61,709	$	58,649

Reconciliation of beginning and ending property casualty reserve balances for claims and claim adjustment expenses [Table Text Block]

The following table presents a reconciliation of beginning and ending property casualty reserve balances for claims and claim adjustment expenses:

	Nine Months Ended September 30,
(in millions)	2023		2022
Claims and claim adjustment expense reserves at beginning of year	$	58,643	$	56,897
Less reinsurance recoverables on unpaid losses	7,790		8,209
Net reserves at beginning of year	50,853		48,688
Estimated claims and claim adjustment expenses for claims arising in the current year	20,205		17,257
Estimated increase (decrease) in claims and claim adjustment expenses for  claims arising in prior years	62		(383)
Total increases	20,267		16,874
Claims and claim adjustment expense payments for claims arising in:
Current year	7,305		6,302
Prior years	10,031		8,638
Total payments	17,336		14,940
Unrealized foreign exchange gain	(1)		(391)
Net reserves at end of period	53,783		50,231
Plus reinsurance recoverables on unpaid losses	7,920		7,900
Claims and claim adjustment expense reserves at end of period	$	61,703	$	58,131