Segment and Geographic Data - Net Sales by Geographic Region and Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Segment and Geographic Data
Net sales	$ 2,548	$ 3,389	$ 8,911	$ 10,148
Transportation Solutions
Segment and Geographic Data
Net sales	1,255	1,968	4,980	5,925
Industrial Solutions
Segment and Geographic Data
Net sales	865	1,005	2,754	2,940
Communications Solutions
Segment and Geographic Data
Net sales	428	416	1,177	1,283
Total Europe/Middle East/Africa
Segment and Geographic Data
Net sales	777	1,217	3,062	3,664
Total Europe/Middle East/Africa | Transportation Solutions
Segment and Geographic Data
Net sales	410	785	1,878	2,365
Total Europe/Middle East/Africa | Industrial Solutions
Segment and Geographic Data
Net sales	313	369	1,014	1,101
Total Europe/Middle East/Africa | Communications Solutions
Segment and Geographic Data
Net sales	54	63	170	198
Total Asia-Pacific
Segment and Geographic Data
Net sales	1,032	1,101	3,136	3,344
Total Asia-Pacific | Transportation Solutions
Segment and Geographic Data
Net sales	606	705	1,979	2,143
Total Asia-Pacific | Industrial Solutions
Segment and Geographic Data
Net sales	153	155	436	465
Total Asia-Pacific | Communications Solutions
Segment and Geographic Data
Net sales	273	241	721	736
Total Americas
Segment and Geographic Data
Net sales	739	1,071	2,713	3,140
Total Americas | Transportation Solutions
Segment and Geographic Data
Net sales	239	478	1,123	1,417
Total Americas | Industrial Solutions
Segment and Geographic Data
Net sales	399	481	1,304	1,374
Total Americas | Communications Solutions
Segment and Geographic Data
Net sales	$ 101	$ 112	$ 286	$ 349