Business Combinations	3 Months Ended
	Jan. 31, 2021
Business Combinations [Abstract]
Business Combinations	Business CombinationsDuring the three months ended January 31, 2021, the Company completed two acquisitions for an aggregate consideration of $77.5 million, net of cash acquired. The Company does not consider these acquisitions to be material, individually or in the aggregate, to the Company’s unaudited condensed consolidated statements of operations. The preliminary purchase allocations are $20.3 million of identifiable intangible assets and $59.3 million in goodwill, which is attributable to the Semiconductor & System Design reporting segment. The fair value of these intangible assets and goodwill are estimated using the income method.The preliminary fair value estimates for the assets acquired and liabilities assumed for all acquisitions completed within 12 months from the applicable acquisition date 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.