Goodwill and Other Intangible Assets - Intangible categories (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Apr. 02, 2016	Sep. 30, 2017	Oct. 01, 2016	Jul. 01, 2017	Dec. 31, 2016	Oct. 02, 2016	Apr. 03, 2016
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	$ 4,621.5			$ 4,621.5			$ 4,417.2
Accumulated Amortization	1,274.1			1,274.1			1,020.4
Indefinite-lived intangibles:	103.4			103.4			114.5
Total other intangible assets	4,724.9			4,724.9			4,531.7
Intangible assets amortization expense	88.5	$ 89.7		261.3	$ 263.9
Indefinite-lived intangible assets(2)		674.4			$ 674.4			$ 674.2	$ 364.5
Useful life of intangible asset					20 years
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	52.0			52.0			50.5
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	51.4			51.4			64.0
Impairment of intangible assets				12.7
Distribution and license agreements, supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	310.2			310.2			305.6
Accumulated Amortization	157.5			157.5			120.4
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,355.4			1,355.4			1,418.1
Accumulated Amortization	568.8			568.8			526.0
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,623.7			1,623.7			1,489.9
Accumulated Amortization	424.5			424.5			307.5
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,317.5			1,317.5			1,189.3
Accumulated Amortization	111.0			111.0			55.3
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	14.7			14.7			14.3
Accumulated Amortization	12.3			12.3			$ 11.2
Omega | Brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Impairment of intangible assets		575.7	$ 273.4
Impairment of Intangible Assets, Finite-lived					$ 290.9
RX
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross						$ 0.0
Intangible assets amortization expense	$ 21.0	$ 27.2		65.6	$ 78.6
Impairment of Intangible Assets, Finite-lived				$ 18.5