Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	$ 68.8	$ 49.3
Definite lived assets, gross	4,685.1	4,379.3
Accumulated Amortization	1,763.9	1,520.4
Total other intangible assets	4,753.9	4,428.6
Distribution and license agreements and supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	126.7	178.6
Accumulated Amortization	81.1	99.0
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,392.8	1,318.8
Accumulated Amortization	755.3	654.6
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,805.6	1,586.6
Accumulated Amortization	671.4	566.5
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,353.5	1,282.4
Accumulated Amortization	250.1	188.5
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	6.5	12.9
Accumulated Amortization	6.0	11.8
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	18.8	18.1
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	$ 50.0	$ 31.2