Goodwill and Other Intangible Assets - Intangible categories (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
	Mar. 30, 2015	Oct. 01, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Oct. 01, 2016		Sep. 26, 2015	[1]	Sep. 15, 2015
Finite And Indefinite Lived Assets By Major Class [Line Items]
Goodwill, impairment loss						$ 967.5
Finite-Lived Intangible Assets, Gross		$ 10,138.4		$ 9,512.2		10,138.4
Intangible assets subject to amortization, accumulated amortization		1,797.5		1,321.7		1,797.5
In-process research and development		792.1		1,916.3		792.1
Total other intangible assets		10,930.5		11,428.5		10,930.5
Intangible assets amortization expense		162.1			$ 147.6	481.8	[1]	$ 397.9
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
In-process research and development		724.2		1,868.1		724.2
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
In-process research and development		67.9		48.2		67.9
Distribution and license agreements, supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross		6,122.3		6,053.4		6,122.3
Intangible assets subject to amortization, accumulated amortization		914.0		667.2		914.0
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross		1,805.9		1,383.5		1,805.9				$ 0.0
Intangible assets subject to amortization, accumulated amortization		529.0		426.0		529.0
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross		1,564.0		1,520.7		1,564.0
Intangible assets subject to amortization, accumulated amortization		288.8		193.0		288.8
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross		631.6		539.4		631.6
Intangible assets subject to amortization, accumulated amortization		54.7		22.8		54.7
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross		14.6		15.2		14.6
Intangible assets subject to amortization, accumulated amortization		11.0		12.7		11.0
Omega [Member] | Brands [Member]
Finite And Indefinite Lived Assets By Major Class [Line Items]
Impairment of intangible assets, indefinite-lived (excluding goodwill)		575.7	$ 273.4			849.1
Impairment of Intangible Assets, Finite-lived		290.2		185.1		290.2
Omega [Member] | In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
In-process research and development	$ 0.0
Omega [Member] | Brands [Member]
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Asset, Useful Life	22 years
Omega [Member] | Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross				$ 27.2
Omega [Member] | Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Finite-Lived Intangible Asset, Useful Life	21 years
BCH
Finite And Indefinite Lived Assets By Major Class [Line Items]
Goodwill, impairment loss		804.1				967.5
Finite-Lived Intangible Assets, Gross		357.1				357.1
Intangible assets amortization expense		$ 38.9			$ 36.3	$ 113.9	[1]	$ 70.5

[1] The BCH segment was created on March 30, 2015 as a result of the Omega acquisition, thus data for the nine months ended September 26, 2015 includes only six months of results from operations attributable to Omega.