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

6 Months Ended

Jun. 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)	Six months ended June 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	11,291			11,564
Prior years	(186		)	21
Total incurred	11,105			11,585
Claims and claims expense paid related to:
Current year	6,060			6,138
Prior years	4,450			4,553
Total paid	10,510			10,691
Net balance as of June 30	19,678			18,871
Plus reinsurance recoverables	6,206			6,033
Balance as of June 30	$	25,884		$	24,904