2.2.0.7trueSUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)40101 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)truefalsefalsefalse1USDfalsefalseUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0$false2USDfalsefalseUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0$false3USDfalsefalseUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0$false4USDfalsefalseUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0$42us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmountus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse2340000023400000falsefalsefalse2falsetruefalsefalse1860000018600000falsefalsefalse3falsetruefalsefalse1950000019500000falsefalsefalse4falsetruefalsefalse1670000016700000falsefalsefalsexbrli:sharesItemTypesharesSecurities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
false52us-gaap_NetIncomeLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalsefalse712061000712061000falsefalsefalse2truetruefalsefalse571398000571398000falsefalsefalse3truetruefalsefalse15669620001566962000falsefalsefalse4truetruefalsefalse11605100001160510000falsefalsefalsexbrli:monetaryItemTypemonetaryThe portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 19
-Article 5
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9
Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 15
Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
false62us-gaap_WeightedAverageNumberOfSharesOutstandingBasicus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabelfalse1falsetruefalsefalse881802000881802000falsefalsefalse2falsetruefalsefalse905611000905611000falsefalsefalse3falsetruefalsefalse891649000891649000falsefalsefalse4falsetruefalsefalse907684000907684000falsefalsefalsexbrli:sharesItemTypesharesNumber of [basic] shares, after adjustment for contingently issuable shares and other shares not deemed outstanding, determined by relating the portion of time within a reporting period that common shares have been outstanding to the total time in that period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
false72us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse1650300016503000falsefalsefalse2falsetruefalsefalse2387700023877000falsefalsefalse3falsetruefalsefalse1874600018746000falsefalsefalse4falsetruefalsefalse2499800024998000falsefalsefalsexbrli:sharesItemTypesharesAggregate awards of share options and nonvested shares to be issued to an employee under a share-based compensation arrangement are considered options for purposes of computing diluted earnings per share. Such share-based awards shall be considered to be outstanding as of the grant date for purposes of computing diluted earnings per share even though their exercise may be contingent upon vesting. Those share-based awards are included in the diluted Earnings Per Share (EPS) computation even if the employee may not receive (or be able to sell) the stock until some future date. Accordingly, all shares to be issued shall be included in computing diluted EPS if the effect is dilutive. The dilutive effect of share-based compensation arrangements shall be computed using the treasury stock method. If the equity share options or other equity instruments are outstanding for only part of a period, the shares issuable shall be weighted to reflect the portion of the period during which the equity instruments were outstanding.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 20
false92us-gaap_WeightedAverageNumberOfDilutedSharesOutstandingus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse898753000898753000falsefalsefalse2falsetruefalsefalse934478000934478000falsefalsefalse3falsetruefalsefalse913819000913819000falsefalsefalse4falsetruefalsefalse938500000938500000falsefalsefalsexbrli:sharesItemTypesharesThe average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
false100natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.gilead.com/taxonomy/role/disclosuresummaryofsignificantaccountingpoliciesdetailsfalse1falsefalsefalsefalse00falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3falsefalsefalsefalse00falsefalsefalse4falsefalsefalsefalse00falsefalsefalsefalse5USDtruefalsefalsefalseNotes 2011 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2011Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170$false6truefalsefalsefalseNotes 2011 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2011Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0false7USDtruefalsefalsefalseNotes 2011 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2011Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170$false8truefalsefalsefalseNotes 2011 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2011Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0naNo definition available.No authoritative reference available.false112us-gaap_DebtInstrumentConvertibleConversionPriceus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse38.7538.75falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3falsetruefalsefalse38.7538.75falsefalsefalse4falsefalsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe price per share of the conversion feature embedded in the debt instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number APB14-1
-Paragraph 32
-Subparagraph b
false122us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse50.8050.80falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3falsetruefalsefalse50.8050.80falsefalsefalse4falsefalsefalsefalse00falsefalsefalseus-types:perUnitItemTypedecimalThe exercise price of each class of warrants or rights outstanding.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph i
-Subparagraph 4
-Article 4
false172gild_ConvertibleSeniorNoteConversionSpreadDilutiveEffectgildfalsenadurationDilutive effect of the conversion spread related to the Convertible Senior Notes.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse8100081000falsefalsefalse2falsetruefalsefalse23520002352000falsefalsefalse3falsetruefalsefalse15680001568000falsefalsefalse4falsetruefalsefalse27660002766000falsefalsefalsexbrli:sharesItemTypesharesDilutive effect of the conversion spread related to the Convertible Senior Notes.No authoritative reference available.false190natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.gilead.com/taxonomy/role/disclosuresummaryofsignificantaccountingpoliciesdetailsfalse1falsefalsefalsefalse00falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3falsefalsefalsefalse00falsefalsefalse4falsefalsefalsefalse00falsefalsefalsefalse9USDtruefalsefalsefalseNotes 2013 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2013Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170$false10truefalsefalsefalseNotes 2013 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2013Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0false11USDtruefalsefalsefalseNotes 2013 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2013Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170$false12truefalsefalsefalseNotes 2013 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldigild_Notes2013Memberus-gaap_LongtermDebtTypeAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0naNo definition available.No authoritative reference available.false202us-gaap_DebtInstrumentConvertibleConversionPriceus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1truetruefalsefalse38.1038.10falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3truetruefalsefalse38.1038.10falsefalsefalse4falsefalsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe price per share of the conversion feature embedded in the debt instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number APB14-1
-Paragraph 32
-Subparagraph b
false212us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse53.9053.90falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3falsetruefalsefalse53.9053.90falsefalsefalse4falsefalsefalsefalse00falsefalsefalseus-types:perUnitItemTypedecimalThe exercise price of each class of warrants or rights outstanding.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph i
-Subparagraph 4
-Article 4
false262gild_ConvertibleSeniorNoteConversionSpreadDilutiveEffectgildfalsenadurationDilutive effect of the conversion spread related to the Convertible Senior Notes.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabelfalse1falsetruefalsefalse367000367000falsefalsefalse2falsetruefalsefalse26380002638000falsefalsefalse3falsetruefalsefalse18560001856000falsefalsefalse4falsetruefalsefalse30520003052000falsefalsefalsexbrli:sharesItemTypesharesDilutive effect of the conversion spread related to the Convertible Senior Notes.No authoritative reference available.false413falseNoRoundingNoRoundingUnKnownfalsetrue