Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	$ 49.3	$ 90.3
Definite lived assets, gross	4,379.3	4,661.7
Accumulated Amortization	1,520.4	1,371.2
Total other intangible assets	4,428.6	4,752.0
Distribution and license agreements and supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	178.6	311.2
Accumulated Amortization	99.0	169.8
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,318.8	1,358.4
Accumulated Amortization	654.6	598.7
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,586.6	1,642.0
Accumulated Amortization	566.5	460.6
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	1,282.4	1,335.4
Accumulated Amortization	188.5	129.5
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Definite lived assets, gross	12.9	14.7
Accumulated Amortization	11.8	12.6
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	18.1	52.1
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangible assets, gross	$ 31.2	$ 38.2