Segment and Geographic Data - Net Sales by Geographic Region and Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 25, 2020	Dec. 27, 2019
Segment and Geographic Data
Net sales	$ 3,522	$ 3,168
Transportation Solutions
Segment and Geographic Data
Net sales	2,224	1,868
Industrial Solutions
Segment and Geographic Data
Net sales	873	927
Communications Solutions
Segment and Geographic Data
Net sales	425	373
Asia-Pacific
Segment and Geographic Data
Net sales	1,293	1,113
Asia-Pacific | Transportation Solutions
Segment and Geographic Data
Net sales	876	742
Asia-Pacific | Industrial Solutions
Segment and Geographic Data
Net sales	163	145
Asia-Pacific | Communications Solutions
Segment and Geographic Data
Net sales	254	226
Europe/Middle East/Africa
Segment and Geographic Data
Net sales	1,316	1,097
Europe/Middle East/Africa | Transportation Solutions
Segment and Geographic Data
Net sales	894	702
Europe/Middle East/Africa | Industrial Solutions
Segment and Geographic Data
Net sales	358	340
Europe/Middle East/Africa | Communications Solutions
Segment and Geographic Data
Net sales	64	55
Americas
Segment and Geographic Data
Net sales	913	958
Americas | Transportation Solutions
Segment and Geographic Data
Net sales	454	424
Americas | Industrial Solutions
Segment and Geographic Data
Net sales	352	442
Americas | Communications Solutions
Segment and Geographic Data
Net sales	$ 107	$ 92