Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 27, 2020	Mar. 27, 2020	Sep. 27, 2019
Goodwill:
Goodwill, beginning balance		$ 5,740
Impairment of goodwill	$ (900)	(900)
Acquisitions		413
Currency translation		(18)
Goodwill, ending balance	5,235	5,235
Goodwill impairment	900	900
Transportation Solutions
Goodwill:
Goodwill, beginning balance		2,124
Impairment of goodwill		(900)
Acquisitions		403
Currency translation		(5)
Goodwill, ending balance	1,622	1,622
Accumulated impairment losses	3,091	3,091	$ 2,191
Goodwill impairment		900
Transportation Solutions \| Sensors
Goodwill:
Impairment of goodwill	(900)
Goodwill, ending balance	626	626
Fair value of reporting unit	1,000	1,000
Amount of carrying amount of reporting unit in excess of fair value	900	900
Goodwill impairment	900
Industrial Solutions
Goodwill:
Goodwill, beginning balance		3,039
Acquisitions		10
Currency translation		(11)
Goodwill, ending balance	3,038	3,038
Accumulated impairment losses	669	669	669
Communications Solutions
Goodwill:
Goodwill, beginning balance		577
Currency translation		(2)
Goodwill, ending balance	575	575
Accumulated impairment losses	$ 489	$ 489	$ 489

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