Other Expenses (Tables)

12 Months Ended

Sep. 30, 2015

Other Expenses [Abstract]

Schedule of Other Operating Cost and Expense, by Component [Table Text Block]

Other expenses for the years ended September 30, 2015, 2014, and 2013 are comprised of the following:

	Year Ended September 30,
(in millions)	2015		2014			2013
Contingent consideration, net(1)	1.8		(2.0		)	3.0
Insurance	1.7		1.6			1.7
Advertising, meetings and conferences	2.7		3.1			2.3
Non-trading hardware and software maintenance and software licensing	4.7		3.8			2.8
Office supplies and printing	1.2		1.1			1.2
Other clearing related expenses	1.1		1.2			1.6
Other non-income taxes	3.7		3.9			3.8
Other	6.6		5.7			6.7
Total other expenses	$	23.5	$	18.4		$	23.1

⁽¹⁾ Contingent consideration includes remeasurement of contingent liabilities related to business combinations accounted for in accordance with the provisions of the Business Combinations Topic of the ASC (see Note 3).