Goodwill and Intangible Assets - Intangible categories (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021	Dec. 31, 2021
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	$ 67.6		$ 67.6		$ 5.3
Gross	4,769.2		4,769.2		3,678.5
Accumulated Amortization	1,546.5		1,546.5		1,532.4
Total intangible assets	4,836.8		4,836.8		3,683.8
Intangible assets amortization expense	62.4	$ 53.4	110.9	$ 106.6
Distribution and license agreements and supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	80.1		80.1		73.2
Accumulated Amortization	55.8		55.8		56.9
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	464.7		464.7		300.2
Accumulated Amortization	198.0		198.0		191.4
Milestone payments	10.0
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,788.8		1,788.8		1,820.7
Accumulated Amortization	883.4		883.4		887.8
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	2,433.5		2,433.5		1,482.3
Accumulated Amortization	407.2		407.2		394.2
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	2.1		2.1		2.1
Accumulated Amortization	2.1		2.1		2.1
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	3.2		3.2		3.5
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	$ 64.4		$ 64.4		$ 1.8