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Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2015
Intangible Assets [Abstract]  
Schedule of Finite and Indefinite-Lived Intangible Assets [Table Text Block]
The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows:
 
September 30, 2015
 
September 30, 2014
(in millions)
Gross Amount
 
Accumulated
Amortization
 
Net Amount
 
Gross Amount
 
Accumulated
Amortization
 
Net Amount
Intangible assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
 
Software programs/platforms
$
2.7

 
$
(2.3
)
 
$
0.4

 
$
2.2

 
$
(1.9
)
 
$
0.3

Customer base
14.0

 
(4.9
)
 
9.1

 
12.9

 
(3.8
)
 
9.1

 
16.7

 
(7.2
)
 
9.5

 
15.1

 
(5.7
)
 
9.4

Intangible assets not subject to amortization:
 
 
 
 
 
 
 
 
 
 
 
Trade name
1.1

 
—

 
1.1

 
1.1

 
—

 
1.1

Total intangible assets
$
17.8

 
$
(7.2
)
 
$
10.6

 
$
16.2

 
$
(5.7
)
 
$
10.5
Schedule of Expected Amortization Expense [Table Text Block]
Amortization expense related to intangible assets was $1.5 million, $1.6 million, and $2.2 million for the fiscal years ended September 30, 2015, 2014, and 2013, respectively.
The estimated future amortization expense as of September 30, 2015 is as follows (in millions):
Year ending September 30,
 
2016
$
1.0

2017
1.0

2018
1.0

2019
1.1

2020 and thereafter
5.4

 
$
9.5