Discontinued Operations - Summary Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Loss from discontinued operations, net of income taxes
Net sales				$ 41
Cost of sales				(50)
Operating expenses				(11)
Pre-tax loss from discontinued operations				(20)
Pre-tax loss on sale of discontinued operations				(86)
Income tax benefit				9
Loss from discontinued operations, net of income taxes	$ (4)	$ 10	$ (1)	$ (97)

Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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