Revenue Recognition - Schedule of Revenue by Product (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 981.1	$ 948.8	$ 1,991.1	$ 2,032.0
CSCA
Disaggregation of Revenue [Line Items]
Net sales	622.3	627.7	1,262.8	1,328.2
CSCA | Upper respiratory
Disaggregation of Revenue [Line Items]
Net sales	102.4	116.7	216.4	271.3
CSCA | Digestive health
Disaggregation of Revenue [Line Items]
Net sales	110.4	112.1	223.9	219.0
CSCA | Nutrition
Disaggregation of Revenue [Line Items]
Net sales	95.6	88.6	187.6	190.8
CSCA | Pain and sleep-aids
Disaggregation of Revenue [Line Items]
Net sales	87.1	97.7	179.5	218.1
CSCA | Oral self-care
Disaggregation of Revenue [Line Items]
Net sales	74.5	63.2	148.2	118.5
CSCA | Healthy lifestyle
Disaggregation of Revenue [Line Items]
Net sales	63.6	81.5	139.1	167.3
CSCA | Skincare and personal hygiene
Disaggregation of Revenue [Line Items]
Net sales	52.9	42.9	106.2	89.6
CSCA | Vitamins, minerals, and supplements
Disaggregation of Revenue [Line Items]
Net sales	8.4	6.4	16.2	12.8
CSCA | Other CSCA
Disaggregation of Revenue [Line Items]
Net sales	27.4	18.6	45.7	40.8
CSCI
Disaggregation of Revenue [Line Items]
Net sales	358.8	321.1	728.3	703.8
CSCI | Upper respiratory
Disaggregation of Revenue [Line Items]
Net sales	42.6	45.5	85.5	129.6
CSCI | Digestive health
Disaggregation of Revenue [Line Items]
Net sales	9.7	5.1	18.2	11.1
CSCI | Pain and sleep-aids
Disaggregation of Revenue [Line Items]
Net sales	47.3	40.2	96.3	87.0
CSCI | Oral self-care
Disaggregation of Revenue [Line Items]
Net sales	22.5	20.4	48.0	43.6
CSCI | Healthy lifestyle
Disaggregation of Revenue [Line Items]
Net sales	48.0	40.5	98.3	84.1
CSCI | Skincare and personal hygiene
Disaggregation of Revenue [Line Items]
Net sales	112.4	97.6	219.4	192.3
CSCI | Vitamins, minerals, and supplements
Disaggregation of Revenue [Line Items]
Net sales	49.1	38.5	108.1	87.0
CSCI | Other CSCI
Disaggregation of Revenue [Line Items]
Net sales	$ 27.2	$ 33.3	$ 54.5	$ 69.1