Plant City and Colonsay Closure Costs (Details) t in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) t	Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred costs	$ 158.1	$ 0.0	$ 1,462.1
Plant City
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred costs			341.3
Colonsay
Restructuring Cost and Reserve [Line Items]
Production Capacity \| t		1.5
2013 Expansion Project Written Off \| t		2.1
Restructuring and related cost, incurred costs		$ 529.7
Colonsay \| Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		27.0
Asset Retirement Obligation Costs \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	37.1
Asset Retirement Obligation Costs \| Plant City
Restructuring Cost and Reserve [Line Items]
Restructuring Costs			110.0
Other Current Assets \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	11.1
Other Current Assets \| Plant City
Restructuring Cost and Reserve [Line Items]
Restructuring Costs			21.0
Other Current Assets \| Colonsay
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		10.0
Property, Plant and Equipment \| Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 109.9
Property, Plant and Equipment \| Plant City
Restructuring Cost and Reserve [Line Items]
Restructuring Costs			$ 210.0
Property, Plant and Equipment \| Colonsay
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		$ 493.0