Restructuring and Transaction Activities, Restructuring Charges (Details) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Sep. 28, 2019 USD ($) Facility	Sep. 29, 2018 USD ($) Facility	Sep. 30, 2017 USD ($) Facility
Restructuring Charges [Abstract]
Number of facilities shut down | Facility									0
Net sales	$ 3,019	$ 1,937	$ 1,950	$ 1,972	$ 2,054	$ 2,072	$ 1,967	$ 1,776	$ 8,878	$ 7,869	$ 7,095
Expected Restructuring Costs [Abstract]
Expected total costs	85								85
Cumulative charges through Fiscal 2019	82								82
To be recognized in future	3								3
Severance and Termination Benefits [Member]
Expected Restructuring Costs [Abstract]
Expected total costs	62								62
Cumulative charges through Fiscal 2019	62								62
To be recognized in future	0								0
Facility Exit Costs [Member]
Expected Restructuring Costs [Abstract]
Expected total costs	13								13
Cumulative charges through Fiscal 2019	10								10
To be recognized in future	3								3
Asset Impairment [Member]
Expected Restructuring Costs [Abstract]
Expected total costs	10								10
Cumulative charges through Fiscal 2019	10								10
To be recognized in future	$ 0								$ 0
Consumer Packaging North America [Member]
Restructuring Charges [Abstract]
Number of facilities shut down | Facility										1
Net sales										$ 15	$ 12
Engineered Materials [Member]
Restructuring Charges [Abstract]
Number of facilities shut down | Facility										1
Net sales										$ 10
Health, Hygiene & Specialties [Member]
Restructuring Charges [Abstract]
Number of facilities shut down | Facility										1	1
Net sales										$ 30	$ 5