Segments - Reconciliation of Net Earnings to Total Company Adjusted EBITDA-Depreciation and Restructuring Expense (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) entity	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) entity	Sep. 30, 2020 USD ($)
Depreciation and Amortization [Abstract]
Depreciation and amortization	$ 55.2	$ 56.2	$ 170.3	$ 161.1
Share-based incentive compensation	10.6	12.3	34.4	31.3
Consolidated restructuring charges	$ 2.4	1.0	$ 4.5	11.7
Number of legal entities | entity	1		1
Food
Depreciation and Amortization [Abstract]
Consolidated restructuring charges	$ 0.8	(1.4)	$ 1.9	3.8
Food | Operating Segments
Depreciation and Amortization [Abstract]
Depreciation and amortization	32.3	31.7	96.7	90.9
Protective
Depreciation and Amortization [Abstract]
Consolidated restructuring charges	1.6	2.4	2.6	7.9
Protective | Operating Segments
Depreciation and Amortization [Abstract]
Depreciation and amortization	$ 22.9	$ 24.5	$ 73.6	$ 70.2