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	Jun. 29, 2019	Sep. 29, 2018	Jun. 30, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 6,728	$ 4,150
Restricted Cash and Investments, Current	1	1
Restricted Cash and Investments, Noncurrent	37	4
Disposal Group, Including Discontinued Operation, Cash	591	0
Cash, Cash Equivalents and Restricted Cash in the Statement of Cash Flows	$ 7,357	$ 4,155	$ 4,331	$ 4,064