Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
Mar. 25, 2016	Sep. 25, 2015
Goodwill:
Goodwill, beginning balance	$ 4,824
Divestiture of business	(117)
Currency translation and other	(34)
Goodwill, ending balance	4,673
Transportation Solutions
Goodwill:
Goodwill, beginning balance	1,863
Currency translation and other	(15)
Goodwill, ending balance	1,848
Accumulated impairment losses	2,191	$ 2,191
Industrial Solutions
Goodwill:
Goodwill, beginning balance	2,253
Currency translation and other	(14)
Goodwill, ending balance	2,239
Accumulated impairment losses	669	669
Communications Solutions
Goodwill:
Goodwill, beginning balance	708
Divestiture of business	(117)
Currency translation and other	(5)
Goodwill, ending balance	586
Accumulated impairment losses	1,514	$ 1,626
Circuit Protection Devices \| Communications Solutions
Goodwill:
Divestiture of business	$ (117)

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 accumulated impairment loss for 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 (a,h)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

Amount of other (increase) decrease of an asset representing the 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 (g)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of divestiture 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 (d)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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