Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Sep. 27, 2019	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Goodwill:
Goodwill, beginning balance		$ 5,684	$ 5,651
Acquisitions		167	80
Purchase price adjustment		(12)	(2)
Currency translation		(99)	(45)
Goodwill, ending balance	$ 5,740	5,740	5,684
Goodwill impairment	0
Transportation Solutions
Goodwill:
Goodwill, beginning balance		1,993	2,011
Acquisitions		167
Currency translation		(36)	(18)
Goodwill, ending balance	2,124	2,124	1,993
Accumulated impairment losses	2,191	2,191	2,191	$ 2,191
Industrial Solutions
Goodwill:
Goodwill, beginning balance		3,104	3,047
Acquisitions			80
Purchase price adjustment		(12)	(2)
Currency translation		(53)	(21)
Goodwill, ending balance	3,039	3,039	3,104
Accumulated impairment losses	669	669	669	669
Communications Solutions
Goodwill:
Goodwill, beginning balance		587	593
Currency translation		(10)	(6)
Goodwill, ending balance	577	577	587
Accumulated impairment losses	$ 489	$ 489	$ 489	$ 489

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.

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