Segments - Net Sales and Adjusted EBITDA by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Total Company Net Sales	$ 1,267.1	$ 1,173.9
Segment Adjusted EBITDA:	266.8	249.1
Food
Segment Reporting Information [Line Items]
Total Company Net Sales	$ 702.2	$ 690.3
Food and Protective Adjusted EBITDA Margin	22.30%	22.60%
Food | Product Concentration Risk | Net Sales
Segment Reporting Information [Line Items]
As a % of Total Company net sales	55.40%	58.80%
Food | Operating Segments
Segment Reporting Information [Line Items]
Total Company Net Sales	$ 702.2	$ 690.3
Segment Adjusted EBITDA:	156.9	156.3
Protective
Segment Reporting Information [Line Items]
Total Company Net Sales	$ 564.9	$ 483.6
Food and Protective Adjusted EBITDA Margin	19.50%	19.20%
Protective | Product Concentration Risk | Net Sales
Segment Reporting Information [Line Items]
As a % of Total Company net sales	44.60%	41.20%
Protective | Operating Segments
Segment Reporting Information [Line Items]
Total Company Net Sales	$ 564.9	$ 483.6
Segment Adjusted EBITDA:	$ 109.9	$ 92.8