Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
Jan. 02, 2016	Sep. 30, 2015
Goodwill [Line Items]
Goodwill	$ 1,086,230	$ 1,069,041
Goodwill, Translation and Purchase Accounting Adjustments	(6,127)
Segment, Software Products [Member]
Goodwill [Line Items]
Goodwill	1,033,647	1,016,413
Goodwill, Translation and Purchase Accounting Adjustments	(6,082)
Segment, Services [Member]
Goodwill [Line Items]
Goodwill	52,583	$ 52,628
Goodwill, Translation and Purchase Accounting Adjustments	(45)
Vuforia Acquisition [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	23,316
Vuforia Acquisition [Member] \| Segment, Software Products [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	23,316
Vuforia Acquisition [Member] \| Segment, Services [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	$ 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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