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Derivative Financial Instruments (Narrative) (Details) - Cash Flow Hedging [Member]
$ in Millions
12 Months Ended
Sep. 29, 2018
USD ($)
Commodity Contracts [Member]  
Derivative [Line Items]  
Cash flow hedge gain (loss) to be reclassified within twelve months $ (11)
Interest Rate Swap [Member]  
Derivative [Line Items]  
Cash flow hedge gain (loss) to be reclassified within twelve months $ 1