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Reinsurance (Tables)
 12 Months Ended
Sep. 30, 2013
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 years ended September 30, 2013, 2012 and 2011 were as follows:
 
Year ended September 30,
 
2013
 
2012
 
2011
 
Insurance Premiums
 
Benefits and Other Changes in Insurance Policy Reserves
 
Insurance Premiums
 
Benefits and Other Changes in Insurance Policy Reserves
 
Insurance Premiums
 
Benefits and Other Changes in Insurance Policy Reserves
Direct
$
279.2

 
$
776.5

 
$
298.0

 
$
1,033.4

 
$
157.8

 
$
392.1

Assumed
32.8

 
23.3

 
47.2

 
34.9

 
22.8

 
19.5

Ceded
(253.2
)
 
(268.0
)
 
(289.9
)
 
(290.9
)
 
(141.6
)
 
(164.0
)
Net
$
58.8

 
$
531.8

 
$
55.3

 
$
777.4

 
$
39.0

 
$
247.6