Segment reporting (Details) |
3 Months Ended |
|---|---|
Oct. 31, 2020 | |
| Segment Reporting [Abstract] | |
| Number of reportable segments | 3 |
| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|