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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Acquisitions (Details) $ in Thousands			3 Months Ended
Acquisitions (Details) $ in Thousands	Nov. 01, 2019 USD ($)	Nov. 19, 2018 USD ($) employee	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs			$ 7,100	$ 400
Onshape [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 468,000
Goodwill, acquired	363,200		$ 363,161
Liabilities	4,100
Frustum [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 69,500
Goodwill, acquired		53,700
Liabilities		$ 2,100
Acquired finite-lived intangible asset, weighted average useful life		15 years
Cash Acquired from Acquisition		$ 700
Entity Number of Employees \| employee		12
Customer lists and relationships \| Onshape [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	61,600
Purchased software \| Onshape [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	44,200
Purchased software \| Frustum [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		$ 17,900
Trademarks [Member] \| Onshape [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 3,600
Minimum [Member] \| Onshape [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, weighted average useful life	10 years
Maximum [Member] \| Customer lists and relationships \| Onshape [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, weighted average useful life	10 years
Maximum [Member] \| Purchased software \| Onshape [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, weighted average useful life	16 years
Maximum [Member] \| Trademarks [Member] \| Onshape [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, weighted average useful life	15 years