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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 3 Total revenues 2 us-gaap_Revenues us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 1927224000 1927224 false false false 2 false true false false 1647155000 1647155 false false false 3 false true false false 4013077000 4013077 false false false 4 false true false false 3177615000 3177615 false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 4 Major customers percentage of total revenues, minimum 2 gild_MajorCustomersPercentageOfTotalRevenuesMinimum gild false na duration Major Customers Percentage Of Total Revenues Minimum false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 0.1 0.1 false false false 4 false false false false 0 0 false false false us-types:percentItemType pure Major Customers Percentage Of Total Revenues Minimum No authoritative reference available. false 6 Antiviral products Atripla [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 5 USD true false false false Antiviral products Atripla [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsAtriplaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 6 USD true false false false Antiviral products Atripla [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsAtriplaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 7 USD true false false false Antiviral products Atripla [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsAtriplaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 8 USD true false false false Antiviral products Atripla [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsAtriplaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 7 Product sales 2 us-gaap_SalesRevenueGoodsNet us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 715804000 715804 false false false 2 false true false false 569142000 569142 false false false 3 false true false false 1408676000 1408676 false false false 4 false true false false 1079025000 1079025 false false false xbrli:monetaryItemType monetary Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 11 Antiviral products Truvada [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 9 USD true false false false Antiviral products Truvada [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsTruvadaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 10 USD true false false false Antiviral products Truvada [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsTruvadaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 11 USD true false false false Antiviral products Truvada [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsTruvadaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 12 USD true false false false Antiviral products Truvada [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsTruvadaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 16 Antiviral products Viread [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 13 USD true false false false Antiviral products Viread [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsVireadMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 14 USD true false false false Antiviral products Viread [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsVireadMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 15 USD true false false false Antiviral products Viread [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsVireadMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 16 USD true false false false Antiviral products Viread [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsVireadMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 17 Product sales 2 us-gaap_SalesRevenueGoodsNet us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 176172000 176172 false false false 2 false true false false 158925000 158925 false false false 3 false true false false 356858000 356858 false false false 4 false true false false 319530000 319530 false false false xbrli:monetaryItemType monetary Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 21 Antiviral products Hepsera [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 17 USD true false false false Antiviral products Hepsera [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsHepseraMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 18 USD true false false false Antiviral products Hepsera [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsHepseraMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 19 USD true false false false Antiviral products Hepsera [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsHepseraMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 20 USD true false false false Antiviral products Hepsera [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsHepseraMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 22 Product sales 2 us-gaap_SalesRevenueGoodsNet us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 51334000 51334 false false false 2 false true false false 67074000 67074 false false false 3 false true false false 109458000 109458 false false false 4 false true false false 139788000 139788 false false false xbrli:monetaryItemType monetary Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 26 Antiviral products Emtriva [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 21 USD true false false false Antiviral products Emtriva [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsEmtrivaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 22 USD true false false false Antiviral products Emtriva [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsEmtrivaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 23 USD true false false false Antiviral products Emtriva [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsEmtrivaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 24 USD true false false false Antiviral products Emtriva [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AntiviralProductsEmtrivaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 31 Total antiviral products [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 25 USD true false false false Total antiviral products [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_TotalAntiviralProductsMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 26 USD true false false false Total antiviral products [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_TotalAntiviralProductsMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 27 USD true false false false Total antiviral products [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_TotalAntiviralProductsMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 28 USD true false false false Total antiviral products [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_TotalAntiviralProductsMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 36 Am Bisome [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 29 USD true false false false Am Bisome [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AmBisomeMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 30 USD true false false false Am Bisome [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AmBisomeMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 31 USD true false false false Am Bisome [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AmBisomeMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 32 USD true false false false Am Bisome [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_AmBisomeMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 37 Product sales 2 us-gaap_SalesRevenueGoodsNet us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 78174000 78174 false false false 2 false true false false 73310000 73310 false false false 3 false true false false 155223000 155223 false false false 4 false true false false 137581000 137581 false false false xbrli:monetaryItemType monetary Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 41 Letairis [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 33 USD true false false false Letairis [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_LetairisMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 34 USD true false false false Letairis [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_LetairisMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 35 USD true false false false Letairis [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_LetairisMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 36 USD true false false false Letairis [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_LetairisMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 42 Product sales 2 us-gaap_SalesRevenueGoodsNet us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 60348000 60348 false false false 2 false true false false 44128000 44128 false false false 3 false true false false 115847000 115847 false false false 4 false true false false 83708000 83708 false false false xbrli:monetaryItemType monetary Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 46 Ranexa [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 37 USD true false false false Ranexa [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_RanexaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 38 USD true false false false Ranexa [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_RanexaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 39 USD true false false false Ranexa [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_RanexaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 40 USD true false false false Ranexa [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_RanexaMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 51 Other product and service [Member] 0 na true na na No definition available. false true false false false false false false false false false http://www.gilead.com/taxonomy/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 41 USD true false false false Other product and service [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_OtherProductAndServiceMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 42 USD true false false false Other product and service [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_OtherProductAndServiceMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 43 USD true false false false Other product and service [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_OtherProductAndServiceMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 44 USD true false false false Other product and service [Member] us-gaap_ProductOrServiceAxis xbrldi http://xbrl.org/2006/xbrldi gild_OtherProductAndServiceMember us-gaap_ProductOrServiceAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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