Property, Plant And Equipment (Details) - USD ($) $ in Millions	Dec. 29, 2018	Sep. 29, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,025	$ 13,035
Less accumulated depreciation	7,007	6,866
Net property, plant and equipment	7,018	6,169
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	168	154
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,455	4,115
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,122	7,720
Land improvements and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	363	357
Buildings and equipment under construction
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 917	$ 689