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Note 15 Unrecognized Stock-based Compensation Expense (Details)
$ in Millions
12 Months Ended
Sep. 29, 2018
USD ($)
Restricted stock units  
Unrecognized Compensation Cost [Line Items]  
Unrecognized Compensation Expense $ 28
Weighted Average Period of Recognition (Years) 1 year 3 months
Performance Shares | Vesting not probable  
Unrecognized Compensation Cost [Line Items]  
Unrecognized Compensation Expense $ 11