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Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, net of accumulated amortization	$ 1,173.0
Foreign currency translation	28.3
Goodwill, net of accumulated amortization	1,201.3
Goodwill, Gross	1,200.0	$ 1,200.0
Potash segment
Goodwill [Line Items]
Goodwill, net of accumulated amortization	1,063.2
Foreign currency translation	27.3
Goodwill, net of accumulated amortization	1,090.5
Mosaic Fertilizantes segment
Goodwill [Line Items]
Goodwill, net of accumulated amortization	97.7
Foreign currency translation	1.0
Goodwill, net of accumulated amortization	98.7
Corporate, other and intersegment eliminations
Goodwill [Line Items]
Goodwill, net of accumulated amortization	12.1
Foreign currency translation	0.0
Goodwill, net of accumulated amortization	$ 12.1

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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