Goodwill and Intangible Assets - Intangible categories (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020	Dec. 31, 2020
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	$ 5.5		$ 5.5		$ 7.0
Gross	3,725.7		3,725.7		3,883.0
Accumulated Amortization	1,499.5		1,499.5		1,401.5
Total other intangible assets	3,731.2		3,731.2		3,890.0
Intangible assets amortization expense	52.2	$ 53.3	159.0	$ 157.5
Distribution and license agreements and supply agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	72.8		72.8		74.8
Accumulated Amortization	56.1		56.1		55.4
Developed product technology, formulations, and product rights
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	300.7		300.7		303.3
Accumulated Amortization	187.6		187.6		177.3
Customer relationships and distribution networks
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,844.1		1,844.1		1,920.5
Accumulated Amortization	872.2		872.2		823.7
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	1,506.0		1,506.0		1,581.5
Accumulated Amortization	381.5		381.5		342.2
Non-compete agreements
Finite And Indefinite Lived Assets By Major Class [Line Items]
Gross	2.1		2.1		2.9
Accumulated Amortization	2.1		2.1		2.9
Trademarks, trade names, and brands
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	3.6		3.6		4.3
In-process research and development
Finite And Indefinite Lived Assets By Major Class [Line Items]
Indefinite-lived intangibles:	$ 1.9		$ 1.9		$ 2.7