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Deferred Policy Acquisition Costs (Tables)
3 Months Ended
Mar. 31, 2019
Insurance [Abstract]  
Reconciliation of Beginning and Ending Deferred Policy Acquisition Costs
The following table represents a reconciliation of beginning and ending deferred policy acquisition costs for the three months ended March 31, 2019 and 2018:
 
 
Three Months Ended March 31,
 
 
 
2019
 
2018
 
 
($ in millions)
 
Balance at the beginning of the period
$
248.5

 
$
294.3

 
 
Acquisition costs deferred
128.1

 
116.4

 
 
Amortization of deferred policy acquisition costs
(88.2
)
 
(90.8
)
 
Balance at the end of the period
$
288.4

 
$
319.9