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Composition of Certain Financial Statement Items Other Income, Costs and Expenses (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 30, 2017
Mar. 29, 2020
Mar. 31, 2019
Mar. 29, 2020
Mar. 31, 2019
Loss Contingencies [Line Items]          
Gain (Loss) Related to Litigation Settlement   $ 23   $ 23 $ 31
Restructuring and restructuring-related charges     $ 25   204
KFTC Complaint [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, Loss in Period $ 927   $ (43)   $ (43)