Business Combinations	12 Months Ended
Oct. 31, 2017
Business Combinations [Abstract]
Business Combinations	Business Combinations Fiscal 2017 Acquisitions During fiscal 2017, the Company completed acquisitions with an aggregated total purchase consideration of $259.7 million, net of cash acquired. The Company assumed unvested stock options with a fair value of $4.4 million using the Black-Scholes option-pricing model and will expense the options over their remaining service periods on a straight-line basis. The Company does not consider these acquisitions to be material, individually or in the aggregate, to the Company’s consolidated financial statements. The preliminary purchase price allocations resulted in $178.5 million of goodwill, of which $11.9 million is deductible for tax purposes, and $95.7 million of acquired identifiable intangible assets valued using the income or cost method. The intangible assets are being amortized over their respective useful lives ranging from one to seven years. The acquisition-related costs for these acquisitions totaling $6.5 million were expensed as incurred in the consolidated statement of operations. The Company funded the acquisitions with existing cash and debt. The preliminary fair value estimates for the assets acquired and liabilities assumed for the acquisitions during the fourth quarter of fiscal 2017 are not yet finalized and may change as additional information becomes available during the respective measurement periods. The primary areas of those preliminary estimates relate to certain tangible assets and liabilities, identifiable intangible assets, and income taxes. Additional information, which existed as of the acquisition date but is yet unknown to the Company, may become known to the Company during the remainder of the measurement period, a period not to exceed 12 months from the acquisition date. Changes to the provisional amounts recorded as assets or liabilities during the measurement period may result in an adjustment to goodwill.

Business Combinations

Fiscal 2017 Acquisitions

During fiscal 2017, the Company completed acquisitions with an aggregated total purchase consideration of $259.7 million, net of cash acquired. The Company assumed unvested stock options with a fair value of $4.4 million using the Black-Scholes option-pricing model and will expense the options over their remaining service periods on a straight-line basis. The Company does not consider these acquisitions to be material, individually or in the aggregate, to the Company’s consolidated financial statements. The preliminary purchase price allocations resulted in $178.5 million of goodwill, of which $11.9 million is deductible for tax purposes, and $95.7 million of acquired identifiable intangible assets valued using the income or cost method. The intangible assets are being amortized over their respective useful lives ranging from one to seven years. The acquisition-related costs for these acquisitions totaling $6.5 million were expensed as incurred in the consolidated statement of operations. The Company funded the acquisitions with existing cash and debt.

The preliminary fair value estimates for the assets acquired and liabilities assumed for the acquisitions during the fourth quarter of fiscal 2017 are not yet finalized and may change as additional information becomes available during the respective measurement periods. The primary areas of those preliminary estimates relate to certain tangible assets and liabilities, identifiable intangible assets, and income taxes. Additional information, which existed as of the acquisition date but is yet unknown to the Company, may become known to the Company during the remainder of the measurement period, a period not to exceed 12 months from the acquisition date. Changes to the provisional amounts recorded as assets or liabilities during the measurement period may result in an adjustment to goodwill.