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Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Oct. 24, 2016
Applicability, Impact and Conclusion of Environmental Loss Contingencies
Environmental contingency accrual		$ 57.3	$ 61.4
Brazilian subsidiary judicial and administrative proceedings
Loss Contingencies [Line Items]
Estimated loss contingency		56.7
Brazilian subsidiary labor claims
Loss Contingencies [Line Items]
Loss Contingency Accrual		49.5
Brazilian subsidiary other civil contingent liabilities and other claims
Loss Contingencies [Line Items]
Estimated loss contingency		2.3
Uberaba gypstacks settled litigation
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value	$ 0.3
Maximum | Brazilian subsidiary judicial and administrative proceedings
Loss Contingencies [Line Items]
Estimated loss contingency		706.2
Maximum | Brazilian Non Income Tax Proceedings
Loss Contingencies [Line Items]
Estimated loss contingency		380.0
Maximum | Brazilian Non Income Tax Proceedings | Indemnification Agreement
Loss Contingencies [Line Items]
Estimated loss contingency		182.7
Maximum | Brazilian Non Income Tax Proceedings | PIS And Cofins cases
Loss Contingencies [Line Items]
Estimated loss contingency		236.8
Maximum | Brazilian subsidiary labor claims
Loss Contingencies [Line Items]
Estimated loss contingency		548.3
Maximum | Brazilian subsidiary environmental claims
Loss Contingencies [Line Items]
Estimated loss contingency		19.0
Loss Contingency Accrual		4.9
Maximum | Brazilian subsidiary other civil contingent liabilities and other claims
Loss Contingencies [Line Items]
Estimated loss contingency		$ 138.8
Minimum | Water loss incident
Loss Contingencies [Line Items]
Financial assurance to support off-site monitoring and sinkhole remediation costs				$ 40.0

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- Definition

Financial assurance obligation required to support remediation costs through, but not limited to, a financial strength test or a parent guarantee.

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