Segment and Geographic Data - Net Sales by Segment and Industry End Market (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Segment and Geographic Data
Net sales	$ 3,195	$ 3,412	$ 6,363	$ 6,759
Transportation Solutions
Segment and Geographic Data
Net sales	1,857	1,971	3,725	3,957
Transportation Solutions | Automotive
Segment and Geographic Data
Net sales	1,365	1,425	2,770	2,894
Transportation Solutions | Commercial transportation
Segment and Geographic Data
Net sales	294	324	552	621
Transportation Solutions | Sensors
Segment and Geographic Data
Net sales	198	222	403	442
Industrial Solutions
Segment and Geographic Data
Net sales	962	1,007	1,889	1,935
Industrial Solutions | Aerospace, defense, oil, and gas
Segment and Geographic Data
Net sales	318	331	627	616
Industrial Solutions | Industrial equipment
Segment and Geographic Data
Net sales	280	326	543	641
Industrial Solutions | Medical
Segment and Geographic Data
Net sales	186	176	365	344
Industrial Solutions | Energy
Segment and Geographic Data
Net sales	178	174	354	334
Communications Solutions
Segment and Geographic Data
Net sales	376	434	749	867
Communications Solutions | Data and devices
Segment and Geographic Data
Net sales	218	251	437	508
Communications Solutions | Appliances
Segment and Geographic Data
Net sales	$ 158	$ 183	$ 312	$ 359