Inventory Financing Arrangement, Maximum Amount

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

Inventory Financing Arrangement, Maximum Borrowing Capacity, Percentage

+ References

No definition available.

+ Details

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- Definition

Proceeds From Inventory Financing Arrangements

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Accounts receivable sold under an agreement with a bank

+ References

No definition available.

+ Details

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Namespace Prefix:	mos_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of borrowings from a bank classified as other, maturing within one year or operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the maximum amount borrowed at any time during the period.

+ References

No definition available.

+ Details

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- Details

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- Details

Name:	us-gaap_ShortTermDebtTypeAxis=mos_ReceivablePurchasingAgreementDomain
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- Details

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Balance Type:
Period Type:

Short-term Debt (Details) $ in Millions	3 Months Ended
Short-term Debt (Details) $ in Millions	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Short-term Debt [Line Items]
Structured accounts payable arrangements	$ 850.1		$ 743.7
Inventory Financing Arrangement, Maximum Amount	$ 625.0
Inventory Financing Arrangement, Maximum Borrowing Capacity, Percentage	0.90
Structured Accounts Payable [Member]
Short-term Debt [Line Items]
Structured accounts payable arrangements			$ 743.7
Receivable Purchasing Agreement [Domain]
Short-term Debt [Line Items]
Short-term Debt, Maximum Amount Outstanding During Period	$ 400.0
Receivable Purchasing Arrangements Sold	549.3	$ 86.6
Inventory Financing Arrangement
Short-term Debt [Line Items]
Proceeds From Inventory Financing Arrangements	$ 452.8	$ 302.7