Composition of Certain Financial Statement Items Other Costs and Expenses (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Sep. 25, 2016 USD ($)		Sep. 27, 2015 CNY (¥)	Sep. 27, 2015 USD ($)		Sep. 28, 2014 USD ($)
Gain on sale of wireless spectrum	$ 380			$ 0		$ 0
Proceeds from sale of wireless spectrum	232			0		0
Deferred payments from sale of wireless spectrum	275
Resolution of governmental investigation, Amount			¥ 6,088	975
Goodwill impairment charges	17			260
Intangible assets impairment charges	43
Carrying value of goodwill	5,679	[1]		5,479	[1]	4,488
Property, plant and equipment, net	2,306			2,534
Other Operating Income (Expense) [Member]
Gain on sale of wireless spectrum	380
Restructuring and restructuring related charges	202			190
Gain on disposition of business	48
Goodwill impairment charges				255
Intangible assets impairment charges				11
Restructuring-related costs	$ 58					19
Gain on sales of certain property, plant and equipment				$ 138
Property, plant and equipment impairment charges						507
Litigation Settlement, Expense						15
Damages awarded over-turned						173
Other Operating Income (Expense) [Member] | QMT [Member]
Goodwill impairment charges						100
Other Operating Income (Expense) [Member] | QRS [Member]
Goodwill impairment charges						$ 16
Minimum [Member]
Deferred payments from sales of wireless spectrum, Due date	Jan. 01, 2020
Maximum [Member]
Deferred payments from sales of wireless spectrum, Due date	Dec. 31, 2023

[1] Cumulative goodwill impairments were $537 million and $520 million at September 25, 2016 and September 27, 2015, respectively.