Segment and Geographic Data - Assets (Details) - USD ($) $ in Millions	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Segment and Geographic Data
Assets	$ 19,694	$ 20,386	$ 19,403
Other non-current assets	454	1,158
Total segment assets
Segment and Geographic Data
Assets	7,730	7,715	6,944
Transportation Solutions
Segment and Geographic Data
Assets	4,781	4,707	4,084
Industrial Solutions
Segment and Geographic Data
Assets	2,100	2,049	1,909
Communications Solutions
Segment and Geographic Data
Assets	849	959	951
Reconciling items
Segment and Geographic Data
Other current assets	1,398	1,981	2,141
Other non-current assets	$ 10,566	$ 10,690	$ 10,318