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Goodwill (Tables)
 3 Months Ended
Dec. 31, 2017
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)
December 31,
2017
 
September 30,
2017
Commercial Hedging
$
30.3

 
$
30.7

Global Payments
6.3

 
6.3

Physical Commodities
2.4

 
2.4

Securities
6.9

 
7.7

Goodwill
$
45.9

 
$
47.1