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Supplemental Cash Flow Information (Cash Payments For Interest And Income Taxes) (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 03, 2020
Sep. 28, 2019
Sep. 29, 2018
Supplemental Cash Flow Information [Abstract]      
Interest, net of amounts capitalized $ 536 $ 419 $ 368
Income taxes, net of refunds $ 511 $ 557 $ 470