Herbalife Ltd. Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Gains (Losses) Relating to Derivative Instruments Reclassified from Accumulated Other Comprehensive Loss into Income Effective Portion (Detail) - Derivatives designated as hedging instruments [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign exchange currency contracts relating to inventory hedges [Member] \| Cost of sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	$ 5.2	$ 1.7	$ 10.0	$ 3.2
Foreign exchange currency contracts relating to intercompany management fee hedges [Member] \| Selling, general and administrative expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	$ 0.1		$ 0.1