Segments - Reconciliation of Net Earnings to Total Company Adjusted EBITDA- Depreciation and Restructuring Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Depreciation and Amortization [Abstract]
Depreciation and amortization	$ 56.9	$ 51.5
Share-based incentive compensation	11.5	8.5
Total Company restructuring charges	0.0	0.6
Food
Depreciation and Amortization [Abstract]
Total Company restructuring charges	(0.2)	0.3
Food | Operating Segments
Depreciation and Amortization [Abstract]
Depreciation and amortization	31.7	29.0
Protective
Depreciation and Amortization [Abstract]
Total Company restructuring charges	0.2	0.3
Protective | Operating Segments
Depreciation and Amortization [Abstract]
Depreciation and amortization	$ 25.2	$ 22.5