Financial Instruments and Fair Value Measurements, Effect of Derivatives on Consolidated Statements of Income (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Derivative Instruments [Abstract]
Amortization related to unrealized losses in Accumulated other comprehensive loss for next 12 months		$ 5
Fair value of long-term indebtedness in excess of book value		77	$ 5
Cross-Currency Swaps [Member] | Interest Expense, Net [Member]
Derivative Instruments [Abstract]
Loss (gain) on derivative instruments	[1]	(19)	(5)	$ 0
Cross-Currency Swaps [Member] | Other Expense, Net [Member]
Derivative Instruments [Abstract]
Loss (gain) on derivative instruments	[2]	41	0	(2)
Foreign Exchange Forward Contracts [Member] | Other Expense, Net [Member]
Derivative Instruments [Abstract]
Loss (gain) on derivative instruments		99	0	0
Interest Rate Swaps [Member] | Interest Expense, Net [Member]
Derivative Instruments [Abstract]
Loss (gain) on derivative instruments		$ 2	$ (1)	$ 24

[1] Designated

[2] Not designated