Reserve for Property and Casualty Insurance Claims and Claims Expense (Tables)

3 Months Ended

Mar. 31, 2023

Reserve for Property-Liability Insurance Claims and Claims Expense [Abstract]

Schedule of liability for unpaid claims and claims adjustment expense

Rollforward of the reserve for property and casualty insurance claims and claims expense
	Three months ended March 31,
($ in millions)	2023		2022
Balance as of January 1	$	37,541	$	33,060
Less recoverables (1)	(9,176)		(9,479)
Net balance as of January 1	28,365		23,581
Incurred claims and claims expense related to:
Current year	10,341		7,677
Prior years	(15)		145
Total incurred	10,326		7,822
Claims and claims expense paid related to:
Current year	(3,122)		(2,751)
Prior years	(6,036)		(4,735)
Total paid	(9,158)		(7,486)
Net balance as of March 31	29,533		23,917
Plus recoverables	9,111		9,074
Balance as of March 31	$	38,644	$	32,991

(1)Recoverables comprises reinsurance and indemnification recoverables.

Prior year reserve reestimates included in claims and claims expense (1)
	Non-catastrophe losses				Catastrophe losses				Total
($ in millions)	2023		2022		2023		2022		2023		2022
Three months ended March 31,
Auto	$	3	$	151	$	(28)	$	(9)	$	(25)	$	142
Homeowners	(12)		4		(8)		(11)		(20)		(7)
Other personal lines	10		(11)		(7)		4		3		(7)
Commercial lines	23		20		1		(1)		24		19
Other business lines	1		(7)		—		4		1		(3)
Run-off Property-Liability	2		1		—		—		2		1
Total prior year reserve reestimates	$	27	$	158	$	(42)	$	(13)	$	(15)	$	145

(1)Favorable reserve reestimates are shown in parentheses.