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Investments in Non-Consolidated Companies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Schedule of Equity Method Investments
Equity method investment, ownership percentage	33.00%
Revenues	$ 12,357.4	$ 8,681.7		$ 8,906.3
Net earnings (loss) including noncontrolling interest	1,634.9	665.6		(1,090.8)
Equity in net earnings (loss) of nonconsolidated companies	7.8	(93.8)		(59.4)
Assets	22,036.4	19,789.8	[1]	19,298.5
Equity Method Investment, Underlying Equity in Net Assets	$ 466.9	452.5		554.7
Gulf Sulphur Services
Schedule of Equity Method Investments
Equity method investment, ownership percentage	50.00%
River Bend Ag
Schedule of Equity Method Investments
Equity method investment, ownership percentage	50.00%
I F C
Schedule of Equity Method Investments
Equity method investment, ownership percentage	45.00%
Canpotex
Schedule of Equity Method Investments
Equity method investment, ownership percentage	36.20%
Equity Method Investee | MWSPC
Schedule of Equity Method Investments
Equity method investment, ownership percentage	25.00%
Proportion of assets represented by MWSPC	70.00%
Proportion of liabilities represented by MWSPC	65.00%
Equity in net earnings (loss) of nonconsolidated companies	$ 5.0	(97.3)		(62.1)
Equity Method Investments [Member]
Schedule of Equity Method Investments
Revenues	4,758.2	3,463.2		4,058.5
Net earnings (loss) including noncontrolling interest	70.1	(405.3)		(215.0)
Assets	10,685.6	8,944.4		9,682.5
Liabilities	$ 8,864.7	$ 7,184.9		$ 7,512.7
[1] In 2019, we recorded an impairment of goodwill in Phosphates of $588.6 million, which reduced the total asset balance

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