Segments - Net Sales and Adjusted EBITDA by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Consolidated Net sales	$ 1,406.7	$ 1,237.2	$ 4,002.3	$ 3,562.3
Segment Adjusted EBITDA:	272.1	261.1	804.3	770.8
Food
Segment Reporting Information [Line Items]
Consolidated Net sales	$ 797.4	$ 704.6	$ 2,236.3	$ 2,068.1
Food and Protective Adjusted EBITDA Margin	21.20%	21.60%	21.70%	23.10%
Food | Product Concentration Risk | Net Sales
Segment Reporting Information [Line Items]
As a % of Consolidated net sales	56.70%	57.00%	55.90%	58.10%
Food | Operating Segments
Segment Reporting Information [Line Items]
Consolidated Net sales	$ 797.4	$ 704.6	$ 2,236.3	$ 2,068.1
Segment Adjusted EBITDA:	169.4	152.4	484.4	477.8
Protective
Segment Reporting Information [Line Items]
Consolidated Net sales	$ 609.3	$ 532.6	$ 1,766.0	$ 1,494.2
Food and Protective Adjusted EBITDA Margin	16.90%	20.40%	18.10%	19.60%
Protective | Product Concentration Risk | Net Sales
Segment Reporting Information [Line Items]
As a % of Consolidated net sales	43.30%	43.00%	44.10%	41.90%
Protective | Operating Segments
Segment Reporting Information [Line Items]
Consolidated Net sales	$ 609.3	$ 532.6	$ 1,766.0	$ 1,494.2
Segment Adjusted EBITDA:	$ 102.7	$ 108.7	$ 319.9	$ 293.0