Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Segment Data
Net sales	$ 3,764	$ 3,367	$ 10,989	$ 9,657
Operating income	558	544	1,763	1,520
Transportation Solutions
Segment Data
Net sales	2,112	1,765	6,278	5,195
Operating income	394	333	1,242	986
Industrial Solutions
Segment Data
Net sales	988	905	2,842	2,553
Operating income	93	100	321	258
Communications Solutions
Segment Data
Net sales	664	697	1,869	1,909
Operating income	$ 71	$ 111	$ 200	$ 276