Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2017 USD ($) Item	Sep. 24, 2016 USD ($)	Sep. 26, 2015 USD ($)
Significant Accounting Policies [Line Items]
Deliverables in arrangements (up to) | Item	3
Measurement of tax position, minimum likelihood of tax benefits being realized upon ultimate settlement, percentage	50.00%
Depreciation and amortization expense	$ 8,200	$ 8,300	$ 9,200
Goodwill impairment charges	0	0	0
Indefinite lived intangible asset impairment charges	$ 0	$ 0	$ 0
Minimum
Significant Accounting Policies [Line Items]
Acquired intangible assets with definite lives, useful life	3 years
Maximum
Significant Accounting Policies [Line Items]
Acquired intangible assets with definite lives, useful life	7 years
Building | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	30 years
Machinery and Equipment | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	1 year
Machinery and Equipment | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	5 years
Internal-Use Software | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	3 years
Internal-Use Software | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	5 years