Reconciliation of Segment Operating Income to Income before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 29, 2018	Dec. 30, 2017
Reconciling Items for Operating Income (Loss) from Segment to Consolidated
Segment operating income	$ 3,655	$ 3,986
Corporate and unallocated shared expenses	(161)	(150)
Restructuring and impairment charges	0	(15)
Other Income	0	53
Interest expense, net	(63)	(129)
Income before income taxes	$ 3,431	$ 3,745

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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