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Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2016
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, 2016
 
September 30, 2015
(in millions)
Gross Amount
 
Accumulated
Amortization
 
Net Amount
 
Gross Amount
 
Accumulated
Amortization
 
Net Amount
Intangible assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
 
Trade name
$
1.1

 
$
(0.6
)
 
$
0.5

 
$
—

 
$
—

 
$
—

Software programs/platforms
2.7

 
(2.4
)
 
0.3

 
2.7

 
(2.3
)
 
0.4

Customer base
14.0

 
(5.7
)
 
8.3

 
14.0

 
(4.9
)
 
9.1

 
17.8

 
(8.7
)
 
9.1

 
16.7

 
(7.2
)
 
9.5

Intangible assets not subject to amortization:
 
 
 
 
 
 
 
 
 
 
 
Trade name
—

 
—

 
—

 
1.1

 
—

 
1.1

Total intangible assets
$
17.8

 
$
(8.7
)
 
$
9.1

 
$
17.8

 
$
(7.2
)
 
$
10.6
Schedule of Expected Amortization Expense [Table Text Block]
Amortization expense related to intangible assets was $1.6 million, $1.5 million, and $1.6 million for the fiscal years ended September 30, 2016, 2015, and 2014, respectively.
The estimated future amortization expense as of September 30, 2016 is as follows (in millions):
Year ending September 30,
 
2017
$
1.6

2018
1.0

2019
1.0

2020
0.8

2021 and thereafter
4.7

 
$
9.1