Annual report pursuant to Section 13 and 15(d)

Segment Information - Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services (Detail)

v3.24.0.1
Segment Information - Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenue from External Customer [Line Items]      
Total net sales $ 5,062.4 $ 5,204.4 $ 5,802.8
Weight Management [Member]      
Revenue from External Customer [Line Items]      
Total net sales 2,851.7 2,954.2 3,370.4
Targeted Nutrition [Member]      
Revenue from External Customer [Line Items]      
Total net sales 1,480.0 1,512.7 1,636.6
Energy, Sports, and Fitness [Member]      
Revenue from External Customer [Line Items]      
Total net sales 560.3 550.6 551.8
Outer Nutrition [Member]      
Revenue from External Customer [Line Items]      
Total net sales 82.5 85.8 107.8
Literature, Promotional and Other [Member]      
Revenue from External Customer [Line Items]      
Total net sales [1] $ 87.9 $ 101.1 $ 136.2
[1] Product buybacks and returns in all product categories are included in the Literature, Promotional, and Other category.