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Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Net sales	$ 13,696.1	$ 19,125.2	$ 12,357.4
Sales And Receivables [Line Items]
Canadian resources taxes and royalties included in cost of goods sold	457.0	1,000.0	301.5
Assets related to PIS and Cofins and income tax credits in Brazil	$ 136.5	105.0
Minimum | Machinery and equipment
Sales And Receivables [Line Items]
Useful life	3 years
Minimum | Buildings and Leashold Improvements
Sales And Receivables [Line Items]
Useful life	3 years
Maximum
Sales And Receivables [Line Items]
Duration of short term investments in number of days	90 days
Maximum | Machinery and equipment
Sales And Receivables [Line Items]
Useful life	25 years
Maximum | Buildings and Leashold Improvements
Sales And Receivables [Line Items]
Useful life	40 years
Canpotex
Sales And Receivables [Line Items]
Accounts Receivable, Related Parties, Current	$ 193.1	244.4
Canpotex
Accounting Policies [Abstract]
Net sales	$ 1,300.0	$ 3,000.0	$ 1,100.0

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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