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Description of Business and Summary of Significant Accounting Policies (Details Textual) $ in Millions | 9 Months Ended |
--- | --- | ---
Apr. 30, 2016 USD ($) Derivative Segment | Jul. 31, 2015 USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items] |  |
Tax benefits realized upon ultimate settlement, Description | The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. |
Marketable securities, amortized cost basis | $ 21.1 |
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds | 21.5 |
Available-for-sale Securities, Gross Realized Gains | 0.4 |
Capitalized Computer Software, Period Increase (Decrease) | 29.8 |
Capitalized software costs | 43.8 | $ 65.1
Accumulated amortization expense | $ 18.0 | $ 42.6
Number of operating segments | Segment | 2 |
Number of reportable segment | Segment | 1 |
Interest Rate Swap |  |
Description Of Business and Summary Of Significant Accounting Policies [Line Items] |  |
Number of interest rate derivatives held | Derivative | 2 |

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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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- Definition The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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