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Other Expenses (Tables) | 6 Months Ended
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Mar. 31, 2017
Other Expenses [Abstract] |
Schedule of Other Operating Cost and Expense, by Component [Table Text Block] | Other expenses for the three and six months ended March 31, 2017 and 2016 consisted of the following:
| Three Months Ended March 31, |  | Six Months Ended March 31,
(in millions) | 2017 |  | 2016 |  | 2017 |  | 2016
Contingent consideration, net | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.3 |
Insurance | 0.8 |  |  | 0.3 |  |  | 1.3 |  |  | 0.7 |
Advertising, meetings and conferences | 1.2 |  |  | 2.3 |  |  | 2.1 |  |  | 3.0 |
Non-trading hardware and software maintenance and software licensing | 2.8 |  |  | 1.3 |  |  | 5.7 |  |  | 2.8 |
Office supplies and printing | 0.5 |  |  | 0.3 |  |  | 1.1 |  |  | 0.6 |
Other clearing related expenses | 0.3 |  |  | 0.3 |  |  | 0.7 |  |  | 0.5 |
Other non-income taxes | 1.2 |  |  | 1.1 |  |  | 2.3 |  |  | 2.1 |
Other | 2.5 |  |  | 1.7 |  |  | 4.6 |  |  | 3.7 |
Total other expenses | $ | 9.4 |  |  | $ | 7.4 |  |  | $ | 17.9 |  |  | $ | 13.7 |

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- Definition Tabular disclosure of each detailed component of other operating costs and expenses that are applicable to sales and revenues, but not included in the cost of sales in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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