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Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported in the Consolidated Balance Sheet that sum to the Total Amount in the Statement of Cash Flow (Details) - USD ($)
$ in Millions
Oct. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
Sep. 29, 2018
Accounting Policies [Abstract]        
Cash and cash equivalents $ 15,959 $ 17,914 $ 5,418  
Restricted Cash and Investments, Current 3 3 26  
Restricted Cash and Investments, Noncurrent 41 37 11  
Cash, cash equivalents and restricted cash $ 16,003 $ 17,954 $ 5,455 $ 4,155