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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Goodwill And Intangible Assets (Goodwill Narrative) (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Goodwill
Goodwill	$ 821,856	$ 784,240	$ 797,217	$ 774,268
Space and Defense Controls
Goodwill
Goodwill	261,726	261,684	261,732	259,951
Goodwill, accumulated impairment loss	4,800
Industrial Systems
Goodwill
Goodwill	380,609	$ 345,617	$ 355,578	$ 332,942
Goodwill, accumulated impairment loss	$ 38,200