Revenue Recognition - Schedule of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 1,219.1	$ 1,149.0	$ 2,560.1	$ 2,323.5
CSCA
Disaggregation of Revenue [Line Items]
Net sales	[2]	627.6	582.1	1,328.2	1,163.9
CSCA | Upper respiratory
Disaggregation of Revenue [Line Items]
Net sales	[2]	116.7	121.2	271.3	254.0
CSCA | Digestive health
Disaggregation of Revenue [Line Items]
Net sales	[2]	112.1	106.3	219.0	208.6
CSCA | Pain and sleep-aids
Disaggregation of Revenue [Line Items]
Net sales	[2]	97.7	91.3	218.1	182.6
CSCA | Nutrition
Disaggregation of Revenue [Line Items]
Net sales	[2]	88.6	85.9	190.8	185.5
CSCA | Healthy lifestyle
Disaggregation of Revenue [Line Items]
Net sales	[2]	81.5	86.1	167.3	162.1
CSCA | Oral self-care
Disaggregation of Revenue [Line Items]
Net sales	[2]	63.2	0.0	118.5	0.0
CSCA | Skincare and personal hygiene
Disaggregation of Revenue [Line Items]
Net sales	[2]	42.9	45.8	89.6	91.3
CSCA | Vitamins, minerals, and supplements
Disaggregation of Revenue [Line Items]
Net sales	[2]	6.4	6.2	12.8	12.5
CSCA | Animal health
Disaggregation of Revenue [Line Items]
Net sales	[2]	0.0	22.3	0.0	41.9
CSCA | Other CSCA
Disaggregation of Revenue [Line Items]
Net sales	[2],[3]	18.5	17.0	40.8	25.4
CSCI
Disaggregation of Revenue [Line Items]
Net sales		321.1	327.5	703.8	678.3
CSCI | Upper respiratory
Disaggregation of Revenue [Line Items]
Net sales		45.5	49.9	129.6	121.8
CSCI | Digestive health
Disaggregation of Revenue [Line Items]
Net sales		5.1	6.8	11.1	14.0
CSCI | Pain and sleep-aids
Disaggregation of Revenue [Line Items]
Net sales		40.2	39.4	87.0	79.8
CSCI | Healthy lifestyle
Disaggregation of Revenue [Line Items]
Net sales		40.5	48.7	84.1	96.0
CSCI | Oral self-care
Disaggregation of Revenue [Line Items]
Net sales		20.4	1.8	43.6	3.4
CSCI | Skincare and personal hygiene
Disaggregation of Revenue [Line Items]
Net sales		97.6	105.7	192.3	207.6
CSCI | Vitamins, minerals, and supplements
Disaggregation of Revenue [Line Items]
Net sales		38.5	41.1	87.0	86.9
CSCI | Other CSCI
Disaggregation of Revenue [Line Items]
Net sales	[4]	33.3	34.1	69.1	68.8
RX
Disaggregation of Revenue [Line Items]
Net sales		$ 270.4	$ 239.4	$ 528.1	$ 481.3

[1] Derived from the location of the entity that sells to a third party.

[2] Includes net sales from our OTC contract manufacturing business.

[3] Consists primarily of diagnostic products and other miscellaneous or otherwise uncategorized product lines and markets, none of which is greater than 10% of the segment net sales.

[4] Consists primarily of liquid licensed products, our distribution business and other miscellaneous or otherwise uncategorized product lines and markets, none of which is greater than 10% of the segment net sales.