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Intangible Assets - (Tables)
 3 Months Ended
Dec. 31, 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:
 
December 31, 2016
 
September 30, 2016
(in millions)
Gross Amount
 
Accumulated
Amortization
 
Net Amount
 
Gross Amount
 
Accumulated
Amortization
 
Net Amount
Intangible assets subject to amortization
 
 
 
 
 
 
 
 
 
 
 
Trade name
$
1.1

 
$
(0.7
)
 
$
0.4

 
$
1.1

 
$
(0.6
)
 
$
0.5

Software programs/platforms
2.7

 
(2.4
)
 
0.3

 
2.7

 
(2.4
)
 
0.3

Customer base
20.0

 
(6.3
)
 
13.7

 
14.0

 
(5.7
)
 
8.3

Total intangible assets
$
23.8

 
$
(9.4
)
 
$
14.4

 
$
17.8

 
$
(8.7
)
 
$
9.1
Schedule of Expected Amortization Expense [Table Text Block]
Amortization expense related to intangible assets was $0.7 million and $0.4 million for the three months ended December 31, 2016 and 2015, respectively.
As of December 31, 2016, the estimated future amortization expense was as follows:
(in millions)
 
Fiscal 2017 (remaining nine months)
$
2.1

Fiscal 2018
2.2

Fiscal 2019
2.2

Fiscal 2020
2.0

Fiscal 2021 and thereafter
5.9

 
$
14.4