Segment and Geographic Data, Selected Information by Product Line (Details) - Net Sales [Member] - Product Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Consumer Packaging International [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Consumer Packaging International [Member] | Packaging [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	83.00%	100.00%	82.00%	100.00%
Consumer Packaging International [Member] | Non-packaging [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	17.00%	0.00%	18.00%	0.00%
Consumer Packaging North America [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Consumer Packaging North America [Member] | Rigid Open Top [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	44.00%	43.00%	45.00%	44.00%
Consumer Packaging North America [Member] | Rigid Closed Top [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	56.00%	57.00%	55.00%	56.00%
Engineered Materials [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Engineered Materials [Member] | Core Films [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	38.00%	40.00%	37.00%	39.00%
Engineered Materials [Member] | Retail & Industrial [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	62.00%	60.00%	63.00%	61.00%
Health, Hygiene & Specialties [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Health, Hygiene & Specialties [Member] | Health [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	17.00%	14.00%	17.00%	14.00%
Health, Hygiene & Specialties [Member] | Hygiene [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	53.00%	54.00%	54.00%	55.00%
Health, Hygiene & Specialties [Member] | Specialties [Member]
Selected Information by Product Line [Abstract]
Concentration risk percentage	30.00%	32.00%	29.00%	31.00%