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General Narrative (Details) - operating_segment |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 31, 2016 | Jan. 31, 2017 | Jan. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Number of reportable segments | 3 | 2 | 2

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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