Property, Plant And Equipment (Details) - USD ($) $ in Millions	Jan. 02, 2021	Oct. 03, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,853	$ 15,581
Less accumulated depreciation	8,189	7,985
Net Property, Plant and Equipment	7,664	7,596
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	208	196
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,030	4,961
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,112	9,013
Land improvements and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	424	420
Buildings and equipment under construction
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,079	$ 991