Annual report pursuant to Section 13 and 15(d)

Inventories - Finished Goods Available for Resale (Detail)

v3.3.1.900
Inventories - Finished Goods Available for Resale (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Inventory [Line Items]    
Total $ 332.0 $ 377.7
Weight Management, Targeted Nutrition and Energy, Sports and Fitness [Member]    
Inventory [Line Items]    
Total 304.3 340.5
Outer Nutrition [Member]    
Inventory [Line Items]    
Total 13.5 20.2
Literature, Promotional and Other [Member]    
Inventory [Line Items]    
Total $ 14.2 $ 17.0