Herbalife Ltd. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Shareholders' (Deficit) Equity - Additional Information (Detail)

Shareholders' (Deficit) Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended			1 Months Ended		2 Months Ended	3 Months Ended				12 Months Ended			3 Months Ended	1 Months Ended
	May 07, 2014	May 04, 2012	May 02, 2012	Jul. 31, 2012	Jun. 30, 2012	Jun. 30, 2014	Mar. 31, 2012	Jun. 30, 2011	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Feb. 28, 2014	Feb. 03, 2014	Jul. 30, 2012	May 03, 2010	Apr. 30, 2009
Stockholders Equity [Line Items]
Common shares, shares outstanding											92.2us-gaap_CommonStockSharesOutstanding	101.1us-gaap_CommonStockSharesOutstanding	106.9us-gaap_CommonStockSharesOutstanding
Preference shares authorized											7.5us-gaap_PreferredStockSharesAuthorized
Preference shares par value											$ 0.002
Dividend declared per common share							$ 0.30	$ 0.20	$ 0.13	$ 0.10	$ 0.30	$ 1.20	$ 1.20
Increase in cash dividend per common share							$ 0.10	$ 0.07	$ 0.03
Dividend declaration date							Feb. 21, 2012	May 02, 2011	Aug. 02, 2010
Dividends paid											$ 30.4us-gaap_PaymentsOfDividendsCommonStock	$ 123.1us-gaap_PaymentsOfDividendsCommonStock	$ 135.1us-gaap_PaymentsOfDividendsCommonStock
Dividends received primarily relating to forward transactions											3.4
Share repurchase program authorized amount																1,500	1,000	1,000	300
Previous expiration date of share repurchase program											Apr. 01, 2011
Revised expiration date of share repurchase program											Dec. 01, 2014
Repurchase of common stock, amount	266.0	427.9									1,291.9	306.5	556.8
Repurchase of common stock, shares			427.9	3.9	5.3	4.3					20.2	6.2	11.5
Share repurchase program expiration date											Jun. 30, 2017
Retained earnings											(665.4)	247.2
Additional paid-in-capital											409.1	323.9
Non-cash forward transaction issuance costs											35.8
Non-cash interest expense											5.8hlf_NoncashInterestExpense
Repurchase agreement date											May 06, 2014
Capped call transactions with financial institutions											123.8hlf_CappedCallTransactions
Convertible notes initial conversion price											$ 86.28
Amounts reclassified from accumulated other comprehensive income (loss) to income, tax benefits unrealized gain (loss) on available-for-sale investments											4.5
Foreign Currency Translation Adjustments [Member]
Stockholders Equity [Line Items]
Other comprehensive income (loss) before reclassifications, Tax expense (benefits)											(7.3)	(4.3)
Unrealized Gain (Loss) on Derivatives [Member]
Stockholders Equity [Line Items]
Other comprehensive income (loss) before reclassifications, Tax expense (benefits)											0.6	1.0
Unrealized Gain (Loss) on Available-For-Sale Investments [Member]
Stockholders Equity [Line Items]
Other comprehensive income (loss) before reclassifications, Tax expense (benefits)											4.6	0.1
Unrealized Gain (Loss) on Derivatives [Member]
Stockholders Equity [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss) to income, tax expense unrealized gain (loss) on derivatives												0.7
Capped call transactions [Member]
Stockholders Equity [Line Items]
Capped call transactions with financial institutions											123.8
Convertible notes initial conversion price											$ 86.28
Capped call transactions price per common share											120.79
Increase (decrease) in additional paid-in capital														123.8
Repurchase Agreement 2014 [Member]
Stockholders Equity [Line Items]
Agreement expiration date											Jun. 30, 2014
Share Repurchase Program 2012 [Member]
Stockholders Equity [Line Items]
Agreement expiration date											Jul. 27, 2012
Prepaid forward share repurchase transactions [Member]
Stockholders Equity [Line Items]
Repurchase of common stock, shares											9.9
Forward share repurchase transactions amount														685.8	685.8
Share repurchase transaction, shares to be purchased															9.9
Settlement date of forward transactions											August 15, 2019
Retained earnings														653.9
Additional paid-in-capital														31.9
Shares repurchased aggregate cost											1,267.1
Average cost per share of shares repurchased											$ 64.25
Share repurchase program, remaining authorized capacity											232.9
Open market purchases [Member]
Stockholders Equity [Line Items]
Repurchase of common stock, shares											19.7	6.1	11.0
Shares repurchased aggregate cost												$ 297.4	$ 527.8
Average cost per share of shares repurchased												$ 49.08	$ 47.78