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Goodwill (Tables)
 9 Months Ended
Jun. 30, 2018
Goodwill [Abstract]  
Schedule of Goodwill [Table Text Block]
The carrying value of goodwill is allocated to the Company’s operating segments as follows:
(in millions)
June 30,
2018
 
September 30,
2017
Commercial Hedging
$
30.3

 
$
30.7

Global Payments
6.3

 
6.3

Physical Commodities
2.4

 
2.4

Securities
6.8

 
7.7

Goodwill
$
45.8

 
$
47.1