Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies Equity and Cost Method Investments (Details)

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Significant Accounting Policies Equity and Cost Method Investments (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2018
Sep. 24, 2017
Sep. 25, 2016
Schedule of Equity and Cost Method Investments [Line Items]      
Equity method investments $ 402 $ 379  
Cost method investments 650 603  
Carrying value of non-marketable equity investments 1,052 982  
Equity Method Investees [Member]      
Schedule of Equity and Cost Method Investments [Line Items]      
Revenues from transactions with one or two equity method investees $ 100 165 $ 196
Aggregate accounts receivable from two equity method investees   $ 29