Reserve for Property-Liability Insurance Claims and Claims Expense (Tables)

9 Months Ended

Sep. 30, 2017

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

Schedule of liability for unpaid claims and claims adjustment expense

Activity in the reserve for property-liability insurance claims and claims expense is summarized as follows:

($ in millions)	Nine months ended September 30,
	2017			2016
Balance as of January 1	$	25,250		$	23,869
Less reinsurance recoverables	6,184			5,892
Net balance as of January 1	19,066			17,977
SquareTrade acquisition as of January 3, 2017	17			—
Incurred claims and claims expense related to:
Current year	16,971			17,018
Prior years	(321		)	120
Total incurred	16,650			17,138
Claims and claims expense paid related to:
Current year	10,052			10,210
Prior years	5,784			5,804
Total paid	15,836			16,014
Net balance as of September 30	19,897			19,101
Plus reinsurance recoverables	7,257			6,349
Balance as of September 30	$	27,154		$	25,450