Income Taxes - Deferred Tax Asset and Liabilities (Details) - USD ($) $ in Millions	Sep. 27, 2019	Sep. 28, 2018
Deferred tax assets:
Accrued liabilities and reserves	$ 245	$ 255
Tax loss and credit carryforwards	6,041	3,237
Inventories	43	58
Intangible assets	964
Pension and postretirement benefits	248	179
Deferred revenue	4	5
Interest	134	30
Unrecognized income tax benefits	7	8
Basis difference in subsidiaries		946
Other	8	13
Gross deferred tax assets	7,694	4,731
Valuation allowance	(4,970)	(2,191)
Deferred tax assets, net of valuation allowance	2,724	2,540
Deferred tax liabilities:
Intangible assets		(552)
Property, plant, and equipment	(57)	(13)
Other	(47)	(38)
Total deferred tax liabilities	(104)	(603)
Net deferred tax assets	$ 2,620	$ 1,937