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Reinsurance (Tables)
 9 Months Ended
Jun. 30, 2015
Reinsurance Disclosures [Abstract]  
Effect of Reinsurance on Premiums Earned, Benefits Incurred and Reserve Changes
The effect of reinsurance on premiums earned, benefits incurred and reserve changes for the three and nine months ended June 30, 2015 and 2014 were as follows:
 
Three months ended June 30,
 
Nine months ended June 30,
 
2015
 
2014
 
2015
 
2014
 
Insurance premiums
 
Benefits and other changes in policy reserves
 
Insurance premiums
 
Benefits and other changes in policy reserves
 
Insurance premiums
 
Benefits and other changes in policy reserves
 
Insurance premiums
 
Benefits and other changes in policy reserves
Direct
$
68.2

 
$
144.1

 
$
65.6

 
$
324.0

 
$
195.5

 
$
698.2

 
$
200.3

 
$
876.8

Assumed
—

 
(43.9
)
 
8.8

 
12.0

 
17.4

 
(14.8
)
 
27.6

 
27.3

Ceded
(50.4
)
 
(43.9
)
 
(61.1
)
 
(70.9
)
 
(168.9
)
 
(190.4
)
 
(185.9
)
 
(207.8
)
Net
$
17.8

 
$
56.3

 
$
13.3

 
$
265.1

 
$
44.0

 
$
493.0

 
$
42.0

 
$
696.3