Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands		3 Months Ended
Nov. 01, 2019	Dec. 28, 2019
Goodwill [Line Items]
Balance, October 1, 2019		$ 1,238,179
Foreign currency translation adjustment		4,710
Balance, December 28, 2019		1,606,050
Software Products
Goodwill [Line Items]
Balance, October 1, 2019		1,196,064
Foreign currency translation adjustment		4,550
Balance, December 28, 2019		1,563,775
Professional Services
Goodwill [Line Items]
Balance, October 1, 2019		42,115
Foreign currency translation adjustment		160
Balance, December 28, 2019		42,275
Onshape [Member]
Goodwill [Line Items]
Goodwill, acquired	$ 363,200	363,161
Onshape [Member] \| Software Products
Goodwill [Line Items]
Goodwill, acquired		363,161
Onshape [Member] \| Professional Services
Goodwill [Line Items]
Goodwill, acquired		$ 0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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