Financial Instruments and Fair Value Measurements, Fair Value of Derivative and Location on Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jun. 29, 2019	Sep. 29, 2018
Cross-Currency Swaps [Member] | Designated [Member] | Other Assets [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	$ 4	$ 0
Cross-Currency Swaps [Member] | Designated [Member] | Other Long-Term Liabilities [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	0	11
Cross-Currency Swaps [Member] | Not Designated [Member] | Other Long-Term Liabilities [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	18	0
Interest Rate Swaps [Member] | Designated [Member] | Other Assets [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	0	16
Interest Rate Swaps [Member] | Designated [Member] | Other Long-Term Liabilities [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	61	0
Interest Rate Swaps [Member] | Not Designated [Member] | Other Long-Term Liabilities [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	0	1
Foreign Exchange Forward Contracts [Member] | Not Designated [Member] | Other Current Liabilities [Member]
Derivative Instruments [Abstract]
Fair value of derivative instruments	$ 138	$ 0