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Income Taxes - Summary Of Income Tax Examinations (Detail) | 12 Months Ended
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Jul. 31, 2019
United States – Federal | Maximum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2018
United States – Federal | Minimum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2016
United States – State | Maximum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2018
United States – State | Minimum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2016
Germany | Maximum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2018
Germany | Minimum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2016
France | Maximum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2018
France | Minimum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2016
Italy | Maximum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2018
Italy | Minimum [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2015
United Kingdom |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2018

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