Discontinued Operations - Summary Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Sep. 28, 2018
Income (loss) from discontinued operations, net of income taxes
Net sales		$ 184	$ 41	$ 510
Cost of sales		(155)	(50)	(438)
Selling, general, and administrative expenses	$ (1)	(13)	(6)	(36)
Research, development, and engineering expenses		(10)	(3)	(30)
Restructuring and other charges, net		(1)	(3)	(5)
Pre-tax income (loss) from discontinued operations	(1)	5	(21)	1
Pre-tax loss on sale of discontinued operations		(1)	(86)	(2)
Income tax (expense) benefit		(3)	9	(5)
Income (loss) from discontinued operations, net of income taxes	$ (1)	$ 1	$ (98)	$ (6)
Balance sheet information for assets and liabilities held for sale
Accounts receivable, net					$ 72
Inventories					130
Other current assets					32
Property, plant, and equipment, net					221
Other assets					17
Total assets held for sale					472
Accounts payable					63
Accrued and other current liabilities					26
Deferred revenue					60
Other liabilities					39
Total liabilities held for sale					$ 188