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Temporary Equity (Tables)
12 Months Ended
Sep. 30, 2013
Temporary Equity [Abstract]  
Temporary Equity
The carrying value of Preferred Stock reflects the following components:
 
 
Series A
(280 shares)
 
Series A-2
(120 shares)
 
Total
Initial issuance price in Fiscal 2011
 
$
280.0

 
$
120.0

 
$
400.0

Principal accretion:
 
 
 
 
 
 
Fiscal 2011
 
4.3

 
0.7

 
5.0

Fiscal 2012
 
8.6

 
3.7

 
12.3

Fiscal 2013
 

 

 

Cumulative principal accretion
 
12.9

 
4.4

 
17.3

Redemption value of preferred stock converted into common stock upon election of holder
 

 
(5.9
)
 
(5.9
)
Redemption value as of September 30, 2013
 
292.9

 
118.5

 
411.4

Bifurcation of embedded conversion feature at issuance
 
(85.7
)
 
(17.6
)
 
(103.3
)
Issuance costs
 
(11.1
)
 
(3.0
)
 
(14.1
)
Accretion:
 
 
 
 
 

Fiscal 2011
 
4.2

 
0.5

 
4.7

Fiscal 2012
 
11.7

 
2.8

 
14.5

Fiscal 2013
 
12.4

 
3.7

 
16.1

Carrying value of Preferred Stock as of September 30, 2013
 
$
224.4

 
$
104.9

 
$
329.3