Restructuring and Transaction Activities, Restructuring Charges by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Restructuring Charges [Abstract]
Restructuring and transaction activities	$ 19	$ 5	$ 36	$ 16
Consumer Packaging International [Member]
Restructuring Charges [Abstract]
Restructuring and transaction activities	14	0	24	0
Consumer Packaging North America [Member]
Restructuring Charges [Abstract]
Restructuring and transaction activities	3	2	4	3
Engineered Materials [Member]
Restructuring Charges [Abstract]
Restructuring and transaction activities	1	1	4	1
Health, Hygiene & Specialties [Member]
Restructuring Charges [Abstract]
Restructuring and transaction activities	$ 1	$ 2	$ 4	$ 12