Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	$ 15.1	$ 68.8
Definite lived assets, gross	5,016.5	4,685.1
Accumulated Amortization	2,042.2	1,763.9
Total other intangible assets	5,031.6	4,753.9
Distribution and license agreements and supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	126.5	126.7
Accumulated Amortization	87.5	81.1
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,363.6	1,392.8
Accumulated Amortization	765.9	755.3
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,934.6	1,805.6
Accumulated Amortization	836.4	671.4
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,586.6	1,353.5
Accumulated Amortization	347.2	250.1
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	5.2	6.5
Accumulated Amortization	5.2	6.0
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	4.3	18.8
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	$ 10.8	$ 50.0