Reinsurance (Tables)

6 Months Ended

Jun. 30, 2017

Reinsurance Disclosures [Abstract]

Schedule of reductions to premiums and contract charges due to reinsurance premium ceded amounts

Property-liability insurance premiums earned and life and annuity premiums and contract charges have been reduced by reinsurance ceded amounts shown in the following table.

($ in millions)	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Property-liability insurance premiums earned	$	254	$	248	$	500	$	497
Life and annuity premiums and contract charges	75		78		150		152

Schedule of reductions to costs and expenses due to reinsurance ceded amounts

Property-liability insurance claims and claims expense, life and annuity contract benefits and interest credited to contractholder funds have been reduced by the reinsurance ceded amounts shown in the following table.

($ in millions)	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Property-liability insurance claims and claims expense	$	124	$	241	$	255	$	402
Life and annuity contract benefits	70		80		117		147
Interest credited to contractholder funds	6		6		11		11