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Income Taxes - Subsidiaries Remain Subject to Tax Examination (Detail) | 12 Months Ended
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Oct. 31, 2015
United States - Synopsys |
Income Tax Examination [Line Items] |
Year(s) Subject to Examination | Fiscal 2015
United States - Magma Design Automation |
Income Tax Examination [Line Items] |
Year(s) Subject to Examination | Fiscal 2012
California - Synopsys |
Income Tax Examination [Line Items] |
Year(s) Subject to Examination | Fiscal years after 2010
California - Magma Design Automation |
Income Tax Examination [Line Items] |
Year(s) Subject to Examination | Fiscal years after 2010
Hungary |
Income Tax Examination [Line Items] |
Year(s) Subject to Examination | Fiscal years after 2008
Ireland, Japan, and Taiwan |
Income Tax Examination [Line Items] |
Year(s) Subject to Examination | Fiscal years after 2009

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