Goodwill and Other Intangible Assets - Intangible categories (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 31, 2017
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	$ 4,732.4		$ 4,661.7
Accumulated Amortization	1,473.3		1,371.2
Indefinite-lived intangibles:	91.3		90.3
Total other intangible assets	4,823.7		4,752.0
Intangible assets amortization expense	87.2	$ 85.5
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	52.8		52.1
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	38.5		38.2
Distribution and license agreements and supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	312.3		311.2
Accumulated Amortization	180.2		169.8
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,362.8		1,358.4
Accumulated Amortization	629.5		598.7
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,675.0		1,642.0
Accumulated Amortization	500.8		460.6
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,367.5		1,335.4
Accumulated Amortization	149.9		129.5
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	14.8		14.7
Accumulated Amortization	12.9		$ 12.6
RX
Finite And Indefinite Lived Assets By Major Class [Line Items]
Intangible assets amortization expense	$ 20.6	22.3
Impairment charge		$ 12.2