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. 30, 2019	Sep. 29, 2018	Mar. 31, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 10,108	$ 4,150
Restricted Cash and Investments, Current	9	1
Restricted Cash and Investments, Noncurrent	5	4
Disposal Group, Including Discontinued Operation, Cash	100	0
Cash, Cash Equivalents and Restricted Cash in the Statement of Cash Flows	$ 10,222	$ 4,155	$ 4,195	$ 4,064