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Reinsurance (Tables)
3 Months Ended
Mar. 31, 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 March 31,
 
2017
 
2016
Property-liability insurance premiums earned
$
246

 
$
249

Life and annuity premiums and contract charges
75

 
74

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 March 31,
 
2017
 
2016
Property-liability insurance claims and claims expense
$
131

 
$
161

Life and annuity contract benefits
47

 
67

Interest credited to contractholder funds
5

 
5