Acquired Intangible Assets - Components of Gross and Net Intangible Asset Balances (Details) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 24, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Total acquired intangible assets, gross carrying amount	$ 7,607	$ 9,012
Definite-lived and amortizable acquired intangible assets, gross carrying amount	7,507	8,912
Definite-lived and amortizable acquired intangible assets, accumulated amortization	(5,309)	(5,806)
Definite-lived and amortizable acquired intangible assets, net carrying amount	2,198	3,106
Indefinite-lived and non-amortizable acquired intangible assets	100	100
Total acquired intangible assets, net carrying amount	$ 2,298	$ 3,206