Segment and Geographic Data - Net Sales by Segment and Industry End Market (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2019	Dec. 28, 2018
Segment and Geographic Data
Net sales	$ 3,168	$ 3,347
Transportation Solutions
Segment and Geographic Data
Net sales	1,868	1,986
Transportation Solutions | Automotive
Segment and Geographic Data
Net sales	1,405	1,469
Transportation Solutions | Commercial transportation
Segment and Geographic Data
Net sales	258	297
Transportation Solutions | Sensors
Segment and Geographic Data
Net sales	205	220
Industrial Solutions
Segment and Geographic Data
Net sales	927	928
Industrial Solutions | Aerospace, defense, oil, and gas
Segment and Geographic Data
Net sales	309	285
Industrial Solutions | Industrial equipment
Segment and Geographic Data
Net sales	263	315
Industrial Solutions | Medical
Segment and Geographic Data
Net sales	179	168
Industrial Solutions | Energy
Segment and Geographic Data
Net sales	176	160
Communications Solutions
Segment and Geographic Data
Net sales	373	433
Communications Solutions | Data and devices
Segment and Geographic Data
Net sales	219	257
Communications Solutions | Appliances
Segment and Geographic Data
Net sales	$ 154	$ 176