Basis of Presentation and Significant Accounting Policies Update Accounting Policy Update (Details) $ in Millions	3 Months Ended
Dec. 30, 2018 USD ($)
Revenue, Performance Obligation [Line Items]
Revenues recognized from performance obligations satisfied in previous periods	$ 72
Revenue recognized in period from unearned revenues in prior period	133
Remaining performance obligation amount	2,000
Revenue, Performance Obligation [Axis]: 2018-12-31
Revenue, Performance Obligation [Line Items]
Remaining performance obligation amount	411
Revenue, Performance Obligation [Axis]: 2019-09-30
Revenue, Performance Obligation [Line Items]
Remaining performance obligation amount	450
Revenue, Performance Obligation [Axis]: 2020-09-28
Revenue, Performance Obligation [Line Items]
Remaining performance obligation amount	415
Revenue, Performance Obligation [Axis]: 2021-09-27
Revenue, Performance Obligation [Line Items]
Remaining performance obligation amount	409
Revenue, Performance Obligation [Axis]: 2022-09-26
Revenue, Performance Obligation [Line Items]
Remaining performance obligation amount	193
Revenue, Performance Obligation [Axis]: 2023-09-25
Revenue, Performance Obligation [Line Items]
Remaining performance obligation amount	$ 77

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
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Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12A
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL108322424-203045

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
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