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This element represents the minimum voting shares (in percentage) owned by the entity that trigger consolidation.

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Summary of Significant Accounting Policies - Other (Details) $ in Millions	12 Months Ended
	Sep. 27, 2019 USD ($) item	Sep. 28, 2018 USD ($)	Sep. 29, 2017 USD ($)
Principles of Consolidation
Percentage of voting shares that triggers consolidation, minimum	50.00%
Revenue Recognition
Practical expedient with respect to financing components	true
Optional exemption not to disclose aggregate amount of transaction prices associated with unsatisfied or partially satisfied performance obligations	true
Goodwill and Other Intangible Assets
Number of reporting units	5
Research and Development
Research and development expenditures \| $	$ 572	$ 606	$ 548
Transportation Solutions
Goodwill and Other Intangible Assets
Number of reporting units	2
Industrial Solutions
Goodwill and Other Intangible Assets
Number of reporting units	2
Communications Solutions
Goodwill and Other Intangible Assets
Number of reporting units	1
Minimum
Goodwill and Other Intangible Assets
Useful life of intangible assets with a determinable life	1 year
Maximum
Goodwill and Other Intangible Assets
Useful life of intangible assets with a determinable life	50 years
Land and improvements \| Minimum
Property, Plant, and Equipment, Net and Long-Lived Assets
Estimated useful life	10 years
Land and improvements \| Maximum
Property, Plant, and Equipment, Net and Long-Lived Assets
Estimated useful life	20 years
Buildings and improvements \| Minimum
Property, Plant, and Equipment, Net and Long-Lived Assets
Estimated useful life	5 years
Buildings and improvements \| Maximum
Property, Plant, and Equipment, Net and Long-Lived Assets
Estimated useful life	40 years
Machinery and equipment \| Minimum
Property, Plant, and Equipment, Net and Long-Lived Assets
Estimated useful life	1 year
Machinery and equipment \| Maximum
Property, Plant, and Equipment, Net and Long-Lived Assets
Estimated useful life	15 years