REVENUE RECOGNITION - Schedule of Net Sales by Category (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2026	Jun. 28, 2025	Jun. 27, 2026	Jun. 28, 2025
Disaggregation of Revenue [Line Items]
Total net sales	$ 1,022.8	$ 1,056.3	$ 1,992.0	$ 2,100.2
Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	904.1	913.6	1,744.2	1,814.8
All Other
Disaggregation of Revenue [Line Items]
Total net sales	118.6	142.7	247.8	285.4
Self Care \| Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	576.6	598.6	1,119.9	1,212.8
Specialty Care \| Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	226.6	233.1	433.6	432.2
Infant Formula \| Operating Segments
Disaggregation of Revenue [Line Items]
Total net sales	100.9	82.0	190.6	169.8
Upper Respiratory \| Self Care
Disaggregation of Revenue [Line Items]
Total net sales	178.4	181.3	375.7	396.0
Digestive Health \| Self Care
Disaggregation of Revenue [Line Items]
Total net sales	115.7	119.8	212.4	232.6
Healthy Lifestyle \| Self Care
Disaggregation of Revenue [Line Items]
Total net sales	157.8	154.7	300.6	311.7
Pain & Sleep \| Self Care
Disaggregation of Revenue [Line Items]
Total net sales	124.6	142.8	231.2	272.5
Skin Health \| Specialty Care
Disaggregation of Revenue [Line Items]
Total net sales	161.8	170.3	313.7	319.9
Women's Health \| Specialty Care
Disaggregation of Revenue [Line Items]
Total net sales	$ 64.8	$ 62.7	$ 119.9	$ 112.3