Principal Accounting Policies and Related Financial Information - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) class	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Nature of Operations
Number of major classes of crop protection | class	3
Trade receivable, net of allowance
Allowance for trade receivable	$ 33.9	$ 37.4	$ 27.9
Allowance for long-term receivables	44.5	27.7	24.7
Additions — charged to expense	$ (0.5)	21.1	4.7
Investments
Maximum ownership percentage for equity method investments (as a percent)	50.00%
Capitalized Interest
Capitalized interest costs	$ 5.6	3.4	3.5
Asset Retirement Obligation [Abstract]
Asset retirement obligation	16.0	24.2
Goodwill and Intangible Assets
Adoption of accounting standards (Note 2)	$ 3,400.9	3,143.7	3,084.2	$ 2,665.6
Percentage of LIFO Inventory (as a percent)	38.00%
Retained Earnings
Goodwill and Intangible Assets
Adoption of accounting standards (Note 2)	$ 5,555.9	5,092.9	4,604.9	4,286.4
Accumulated Other Comprehensive Income (Loss)
Goodwill and Intangible Assets
Adoption of accounting standards (Note 2)	$ (459.6)	$ (325.5)	$ (280.7)	(405.4)
Cumulative Effect, Period of Adoption, Adjustment
Goodwill and Intangible Assets
Adoption of accounting standards (Note 2)				104.2
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Goodwill and Intangible Assets
Adoption of accounting standards (Note 2)				97.6
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Other Comprehensive Income (Loss)
Goodwill and Intangible Assets
Adoption of accounting standards (Note 2)				$ 6.6
Minimum
Goodwill and Intangible Assets
Weighted avg. useful life remaining at December 31, 2022	3 years
Maximum
Goodwill and Intangible Assets
Weighted avg. useful life remaining at December 31, 2022	20 years
Land Improvements
Property, plant and equipment and capitalized software
Useful lives (in years)	20 years
Building | Minimum
Property, plant and equipment and capitalized software
Useful lives (in years)	15 years
Building | Maximum
Property, plant and equipment and capitalized software
Useful lives (in years)	40 years
Machinery and Equipment | Minimum
Property, plant and equipment and capitalized software
Useful lives (in years)	3 years
Machinery and Equipment | Maximum
Property, plant and equipment and capitalized software
Useful lives (in years)	18 years
Software Development | Minimum
Property, plant and equipment and capitalized software
Useful lives (in years)	3 years
Software Development | Maximum
Property, plant and equipment and capitalized software
Useful lives (in years)	10 years