Goodwill and Other Intangible Assets - Intangible categories (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		9 Months Ended	12 Months Ended
	Jul. 01, 2017	Apr. 01, 2017	Jul. 02, 2016	Apr. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Oct. 01, 2016	Dec. 31, 2016	Oct. 02, 2016	Apr. 03, 2016
Finite And Indefinite Lived Assets By Major Class [Line Items]
Goodwill impairment charge				$ 130.5
Gross	$ 4,573.7				$ 4,573.7			$ 4,417.2
Accumulated Amortization	1,200.3				1,200.3			1,020.4
Indefinite-lived intangibles:	102.7				102.7			114.5
Total other intangible assets	4,676.4				4,676.4			4,531.7
Intangible assets amortization expense	87.2		$ 88.9		172.8	$ 174.1
Indefinite-lived intangible assets(2)									$ 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:	51.5				51.5			50.5
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	51.2				51.2			64.0
Impairment of intangible assets		$ 12.2
Distribution and license agreements, supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	309.4				309.4			305.6
Accumulated Amortization	145.2				145.2			120.4
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,385.6				1,385.6			1,418.1
Accumulated Amortization	566.5				566.5			526.0
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,584.6				1,584.6			1,489.9
Accumulated Amortization	384.8				384.8			307.5
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,279.5				1,279.5			1,189.3
Accumulated Amortization	91.8				91.8			55.3
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	14.6				14.6			14.3
Accumulated Amortization	12.0				12.0			11.2
Omega | Brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Impairment of intangible assets				$ 273.4
Impairment of Intangible Assets, Finite-lived								$ 1,500.0
RX
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	0.0				0.0
Intangible assets amortization expense	22.3		$ 25.9		$ 44.6	$ 51.4
Impairment of Intangible Assets, Finite-lived	$ 18.5