2.4.0.84040 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET (Details)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalseD2013Q2YTD_FranchiseStoresMemberhttp://www.sec.gov/CIK0001502034duration2013-01-01T00:00:002013-06-30T00:00:00ItemStandardhttp://www.gnc.com/20130630itemgnc0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$2false USDfalsefalseD2012Q2YTD_FranchiseStoresMemberhttp://www.sec.gov/CIK0001502034duration2012-01-01T00:00:002012-06-30T00:00:00ItemStandardhttp://www.gnc.com/20130630itemgnc0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$1false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse1false USDtruefalseD2013Q2YTD_FranchiseStoresMemberhttp://www.sec.gov/CIK0001502034duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseFranchise storesus-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldignc_FranchiseStoresMemberus-gaap_BusinessAcquisitionAxisexplicitMemberItemStandardhttp://www.gnc.com/20130630itemgnc0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse0Franchise stores2true 3gnc_GoodwillAndIntangibleAssetsLineItemsgnc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Acquisitions3false 4gnc_NumberOfFranchiseStoresAcquiredgnc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1111falsefalsefalse2truefalsefalse1717falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of franchise stores acquired by the entity.No definition available.false256Number of franchise stores acquired4false 4us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse20000002.0USD$falsetruefalse2truefalsefalse34000003.4USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Total purchase prices associated with acquisitions5false 4us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaidus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse12000001.2USD$falsetruefalse2truefalsefalse16000001.6USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of cash paid to acquire the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Cash paidfalseGOODWILL AND INTANGIBLE ASSETS, NET (Details) (Franchise stores, USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.gnc.com/role/DisclosureGoodwillAndIntangibleAssetsNetDetails25