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Income Taxes Income Tax Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation Allowance [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 91.7	$ (774.1)	$ (73.4)
Deferred Tax Assets, Valuation Allowance, Net	774.7	683.0	1,457.1
Tax Credit Carryforward, Valuation Allowance	111.2		49.8
Operating Loss Carryforwards, Valuation Allowance		24.1	6.8
PERU
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Valuation Allowance		0.9	8.3
Foreign Tax Authority
Valuation Allowance [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	3.4	32.2	9.2
United States
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Valuation Allowance	2.4	3.5
Vale Fertilizantes S.A.
Valuation Allowance [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 13.9	$ 763.5	$ 48.0

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- Definition

Deferred Tax Assets, Valuation Allowance, Net

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The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 740
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Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

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