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Derivative Financial Instruments (Narrative) (Details)
$ in Millions
9 Months Ended
Jun. 29, 2019
USD ($)
Commodity contracts  
Derivative [Line Items]  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months $ 2
Interest rate hedges  
Derivative [Line Items]  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months (3)
Treasury Rate Locks  
Derivative [Line Items]  
Cash Flow Hedge Gain (Loss) to be Reclassified Over Life of Forecasted Fixed-Rate Debt $ (19)