Composition of Certain Financial Statement Items Other Income, Costs and Expenses (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 27, 2015	Dec. 28, 2014
Proceeds from sale of wireless spectrum	$ 232	$ 0
Deferred payments	275
Realized gain on sale of wireless spectrum	380	0
Restructuring and restructuring related charges	54
Gain on sale of business	$ 48
Goodwill impairment charge		69
Gain on sale of certain property, plant and equipment		$ 16
Minimum [Member]
Deferred payments, Due date	Jan. 01, 2020
Maximum [Member]
Deferred payments, Due date	Dec. 31, 2023

Amount of gain (loss) on sale or disposal of intangible assets.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

+ References

No definition available.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

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-Name Accounting Standards Codification
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The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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Date the receivable or note with imputed interest is due, in CCYY-MM-DD format.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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