Disaggregation of Revenue and Long Lived Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets
Net sales		$ 13,696.1	$ 19,125.2	$ 12,357.4
Long-lived assets		16,070.0	14,960.8
Goodwill		1,138.6	1,116.3	1,172.2
Deferred Income Tax Assets, Net		1,079.2	752.3
Phosphate Crop Nutrients | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales		3,277.5	4,465.0	3,552.7
Potash Crop Nutrients | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales		4,107.7	6,484.1	3,367.9
Crop Nutrient Blends | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales		2,107.4	2,970.0	1,800.0
Specialty Products | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[1]	2,453.3	3,025.8	1,973.6
Phosphate Rock | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales		125.9	125.9	75.5
Other Product Types | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[2]	$ 1,624.3	2,054.4	1,587.7
Brazil
Revenues from External Customers and Long-Lived Assets
Canpotex sales volumes by geography, percentage		35.00%
Long-lived assets		$ 2,467.8	2,153.5
Brazil | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	5,480.9	8,045.5	5,002.2
Canpotex
Revenues from External Customers and Long-Lived Assets
Net sales		1,300.0	3,000.0	1,100.0
Canpotex | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3],[4]	1,275.7	2,961.6	1,089.6
Canada
Revenues from External Customers and Long-Lived Assets
Long-lived assets		4,876.1	4,716.2
Canada | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	$ 411.6	966.0	794.9
India
Revenues from External Customers and Long-Lived Assets
Canpotex sales volumes by geography, percentage		7.00%
India | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	$ 350.8	512.5	340.3
China
Revenues from External Customers and Long-Lived Assets
Canpotex sales volumes by geography, percentage		12.00%
China | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	$ 556.1	648.2	396.0
Australia | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	69.0	101.6	64.8
Mexico | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	125.5	165.5	93.6
Colombia | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	103.2	125.9	135.1
Paraguay | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	222.8	227.1	113.8
Japan | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	157.7	162.0	112.4
Peru | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	77.5	70.2	40.0
Argentina | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	75.2	224.6	101.3
Honduras | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	30.0	31.2	22.3
Thailand | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	8.4	6.3	18.1
Other Foreign
Revenues from External Customers and Long-Lived Assets
Long-lived assets		1,521.3	1,432.5
Other Foreign | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	55.9	100.8	73.9
Total Foreign
Revenues from External Customers and Long-Lived Assets
Long-lived assets		8,865.2	8,302.2
Total Foreign | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales		9,017.0	14,383.1	8,428.1
United States
Revenues from External Customers and Long-Lived Assets
Long-lived assets		7,204.8	6,658.6
United States | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	$ 4,679.1	4,742.1	3,929.3
Other Countries
Revenues from External Customers and Long-Lived Assets
Canpotex sales volumes by geography, percentage		37.00%
Total Geography
Revenues from External Customers and Long-Lived Assets
Net sales		$ 13,696.1	19,125.2	12,357.4
DOMINICAN REPUBLIC | Transferred at Point in Time
Revenues from External Customers and Long-Lived Assets
Net sales	[3]	$ 16.7	$ 34.1	$ 29.8
BANGLADESH
Revenues from External Customers and Long-Lived Assets
Canpotex sales volumes by geography, percentage		9.00%

[1] Includes sales of MicroEssentials®, K-Mag® and Aspire®.

[2] Includes sales of industrial potash, feed products, nitrogen and other products.

[3] Revenues are attributed to countries based on location of customer.

[4] Canpotex sales to the ultimate third-party customers are approximately: 35% to customers based in Brazil, 12% to customers based in China, 9% to customers based in Bangladesh, 7% to customers based in India, and 37% to customers based in the rest of the world.