Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported in the Condensed Consolidated Balance Sheet to the Total Amount in the Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 28, 2019	Mar. 30, 2019	Sep. 29, 2018
Accounting Policies [Abstract]
Cash and Cash Equivalents	$ 14,339	$ 5,418
Restricted Cash and Investments, Current	1	26
Restricted Cash and Investments, Noncurrent	38	11
Cash, Cash Equivalents and Restricted Cash in the Statement of Cash Flows	$ 14,378	$ 5,455	$ 10,222	$ 4,155