Segments - Net Sales and Adjusted EBITDA of Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 4,903.2	$ 4,791.1	$ 4,732.7
Adjusted EBITDA from continuing operations	$ 1,051.1	$ 964.8	$ 889.5
Adjusted EBITDA Margin	21.40%	20.10%	18.80%
Food
Segment Reporting Information [Line Items]
Net sales	$ 2,825.5	$ 2,880.5	$ 2,908.1
Operating Segments | Food
Segment Reporting Information [Line Items]
Net sales	2,825.5	2,880.5	2,908.1
Adjusted EBITDA from continuing operations	$ 647.5	$ 629.3	$ 577.8
Adjusted EBITDA Margin	22.90%	21.80%	19.90%
Operating Segments | Protective
Segment Reporting Information [Line Items]
Net sales	$ 2,077.7	$ 1,910.6	$ 1,824.6
Adjusted EBITDA from continuing operations	$ 408.0	$ 349.9	$ 318.6
Adjusted EBITDA Margin	19.60%	18.30%	17.50%
Corporate
Segment Reporting Information [Line Items]
Adjusted EBITDA from continuing operations	$ (4.4)	$ (14.4)	$ (6.9)
Product Concentration Risk | Net Sales | Operating Segments | Food
Segment Reporting Information [Line Items]
As a % of Total Company net sales	57.60%	60.10%	61.40%
Product Concentration Risk | Net Sales | Operating Segments | Protective
Segment Reporting Information [Line Items]
As a % of Total Company net sales	42.40%	39.90%	38.60%