v2.4.1.9
Segment Information Segment Information (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                        
Depreciation and amortization                   $ 1,379.0us-gaap_DepreciationDepletionAndAmortization $ 1,445.6us-gaap_DepreciationDepletionAndAmortization $ 1,462.2us-gaap_DepreciationDepletionAndAmortization
Revenue   5,121.3us-gaap_Revenues 4,875.6us-gaap_Revenues 4,935.6us-gaap_Revenues 4,683.1us-gaap_Revenues 5,808.8us-gaap_Revenues 5,772.6us-gaap_Revenues 5,929.7us-gaap_Revenues 5,602.0us-gaap_Revenues 19,615.6us-gaap_Revenues 23,113.1us-gaap_Revenues 22,603.4us-gaap_Revenues
Long-Lived Assets 8,741.3us-gaap_NoncurrentAssets 8,547.2us-gaap_NoncurrentAssets       8,741.3us-gaap_NoncurrentAssets       8,547.2us-gaap_NoncurrentAssets 8,741.3us-gaap_NoncurrentAssets 8,990.5us-gaap_NoncurrentAssets
Asset impairment, restructuring, and other special charges   (401.0)us-gaap_RestructuringSettlementAndImpairmentProvisions (36.3)us-gaap_RestructuringSettlementAndImpairmentProvisions 0us-gaap_RestructuringSettlementAndImpairmentProvisions (31.4)us-gaap_RestructuringSettlementAndImpairmentProvisions (35.4)us-gaap_RestructuringSettlementAndImpairmentProvisions 0us-gaap_RestructuringSettlementAndImpairmentProvisions (63.5)us-gaap_RestructuringSettlementAndImpairmentProvisions (21.7)us-gaap_RestructuringSettlementAndImpairmentProvisions (468.7)us-gaap_RestructuringSettlementAndImpairmentProvisions (120.6)us-gaap_RestructuringSettlementAndImpairmentProvisions (281.1)us-gaap_RestructuringSettlementAndImpairmentProvisions
Selling, General and Administrative Expense                   (6,620.8)us-gaap_SellingGeneralAndAdministrativeExpense (7,125.6)us-gaap_SellingGeneralAndAdministrativeExpense (7,513.5)us-gaap_SellingGeneralAndAdministrativeExpense
Income before income taxes   513.6us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 655.5us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 940.4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 890.8us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 909.9us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,513.4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,514.9us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,951.1us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 3,000.3us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 5,889.3us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 5,408.2us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Acquired in-process research and development (57.1)lly_AcquiredInProcessResearchAndDevelopment (105.2)lly_AcquiredInProcessResearchAndDevelopment (95.0)lly_AcquiredInProcessResearchAndDevelopment 0lly_AcquiredInProcessResearchAndDevelopment 0lly_AcquiredInProcessResearchAndDevelopment (57.1)lly_AcquiredInProcessResearchAndDevelopment 0lly_AcquiredInProcessResearchAndDevelopment 0lly_AcquiredInProcessResearchAndDevelopment 0lly_AcquiredInProcessResearchAndDevelopment (200.2)lly_AcquiredInProcessResearchAndDevelopment (57.1)lly_AcquiredInProcessResearchAndDevelopment 0lly_AcquiredInProcessResearchAndDevelopment
Gain (Loss) on Contract Termination                   0us-gaap_GainLossOnContractTermination 495.4us-gaap_GainLossOnContractTermination 787.8us-gaap_GainLossOnContractTermination
Other-net, (income) expense   137.2us-gaap_NonoperatingIncomeExpense 93.5us-gaap_NonoperatingIncomeExpense 53.8us-gaap_NonoperatingIncomeExpense 56.0us-gaap_NonoperatingIncomeExpense 9.1us-gaap_NonoperatingIncomeExpense (31.3)us-gaap_NonoperatingIncomeExpense 11.9us-gaap_NonoperatingIncomeExpense 529.2us-gaap_NonoperatingIncomeExpense 340.5us-gaap_NonoperatingIncomeExpense 518.9us-gaap_NonoperatingIncomeExpense 674.0us-gaap_NonoperatingIncomeExpense
United States [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   9,134.1us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
12,889.7us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
12,313.1us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
Long-Lived Assets 4,649.6us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
4,566.2us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
      4,649.6us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
      4,566.2us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
4,649.6us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
5,064.7us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
Europe [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   4,506.7us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
4,338.4us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
4,259.7us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Long-Lived Assets 2,469.7us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
2,401.5us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
      2,469.7us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
      2,401.5us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
2,469.7us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
2,281.1us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
JAPAN                        
Segment Reporting Information [Line Items]                        
Revenue                   2,027.1us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_JP
2,063.8us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_JP
2,246.2us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_JP
Long-Lived Assets 81.1us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_JP
80.4us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_JP
      81.1us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_JP
      80.4us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_JP
81.1us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_JP
101.5us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_JP
Other Foreign Countries [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   3,947.7us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
3,821.2us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
3,784.4us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
Long-Lived Assets 1,540.9us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
1,499.1us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
      1,540.9us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
      1,499.1us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
1,540.9us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
1,543.2us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= lly_OtherForeignCountriesMember
Total segment [Member]                        
Segment Reporting Information [Line Items]                        
Income before income taxes                   3,696.2us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_TotalSegmentMember
5,571.6us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_TotalSegmentMember
4,901.5us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_TotalSegmentMember
Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   6,939.0us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
7,304.4us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
6,810.9us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Neuroscience [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   3,596.5us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
7,216.2us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
7,575.1us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
Oncology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   3,393.0us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
3,268.5us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
3,281.6us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
Cardiovascular [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   3,053.5us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
2,923.2us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
2,632.5us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
Other Pharmaceuticals [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   287.0us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OtherPharmaceuticalsMember
249.3us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OtherPharmaceuticalsMember
266.8us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OtherPharmaceuticalsMember
Human Pharmaceutical Products Total [Member]                        
Segment Reporting Information [Line Items]                        
Depreciation and amortization                   1,270.0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
1,350.0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
1,370.0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
Revenue                   17,269.0us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
20,961.6us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
20,566.9us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
Income before income taxes                   3,132.0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
5,015.0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
4,393.4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_PharmaceuticalProductsTotalMember
Animal Health Products [Member]                        
Segment Reporting Information [Line Items]                        
Depreciation and amortization                   111.5us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
99.4us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
91.1us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
Revenue                   2,346.6us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
2,151.5us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
2,036.5us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
Income before income taxes                   564.2us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
556.6us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
508.1us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= lly_AnimalHealthProductsMember
Corporate, Non-Segment [Member]                        
Segment Reporting Information [Line Items]                        
Asset impairment, restructuring, and other special charges                   (468.7)us-gaap_RestructuringSettlementAndImpairmentProvisions
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
(120.6)us-gaap_RestructuringSettlementAndImpairmentProvisions
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
(281.1)us-gaap_RestructuringSettlementAndImpairmentProvisions
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
Selling, General and Administrative Expense                   (119.0)us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
0us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
0us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
Acquired in-process research and development                   (200.2)lly_AcquiredInProcessResearchAndDevelopment
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
(57.1)lly_AcquiredInProcessResearchAndDevelopment
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
0lly_AcquiredInProcessResearchAndDevelopment
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
Amylin [Member] | Corporate, Non-Segment [Member]                        
Segment Reporting Information [Line Items]                        
Gain (Loss) on Contract Termination                   0us-gaap_GainLossOnContractTermination
/ us-gaap_ProductOrServiceAxis
= lly_AmylinMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
495.4us-gaap_GainLossOnContractTermination
/ us-gaap_ProductOrServiceAxis
= lly_AmylinMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
787.8us-gaap_GainLossOnContractTermination
/ us-gaap_ProductOrServiceAxis
= lly_AmylinMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
Cymbalta [Member] | Neuroscience [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   1,614.7us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_CymbaltaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
5,084.4us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_CymbaltaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
4,994.1us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_CymbaltaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
Humalog [Member] | Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   2,785.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_HumalogMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
2,611.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_HumalogMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
2,395.5us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_HumalogMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Humulin [Member] | Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   1,400.1us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_HumulinMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
1,315.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_HumulinMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
1,239.1us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_HumulinMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Forteo [Member] | Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   1,322.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ForteoMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
1,244.9us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ForteoMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
1,151.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ForteoMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Evista [Member] | Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   419.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_EvistaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
1,050.4us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_EvistaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
1,010.1us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_EvistaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Trajenta (BI) [Member] | Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   328.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_TrajentaBIMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
249.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_TrajentaBIMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
88.6us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_TrajentaBIMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Other Endocrinology [Member] | Endocrinology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   683.1us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherEndocrinologyMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
832.9us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherEndocrinologyMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
926.6us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherEndocrinologyMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_EndocrinologyMember
Zyprexa [Member] | Neuroscience [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   1,037.3us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ZyprexaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
1,194.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ZyprexaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
1,701.4us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ZyprexaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
Strattera [Member] | Neuroscience [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   738.5us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_StratteraMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
709.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_StratteraMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
621.4us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_StratteraMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
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Segment Reporting Information [Line Items]                        
Revenue                   206.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherNeuroscienceMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
227.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherNeuroscienceMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
258.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherNeuroscienceMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_NeuroscienceMember
Alimta [Member] | Oncology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   2,792.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_AlimtaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
2,703.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
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/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
2,594.3us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_AlimtaMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
Erbitux [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   373.3us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ErbituxMember
373.7us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ErbituxMember
397.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ErbituxMember
Erbitux [Member] | Oncology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   373.3us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_ErbituxMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
373.7us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
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/ us-gaap_StatementBusinessSegmentsAxis
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/ us-gaap_ProductOrServiceAxis
= lly_ErbituxMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
Other Oncology [Member] | Oncology [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   227.7us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherOncologyMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
191.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherOncologyMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
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/ us-gaap_ProductOrServiceAxis
= lly_OtherOncologyMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_OncologyMember
Cialis [Member] | Cardiovascular [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   2,291.0us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_CialisMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
2,159.4us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_CialisMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
1,926.8us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_CialisMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
Effient [Member] | Cardiovascular [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   522.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_EffientMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
508.7us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_EffientMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
457.2us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_EffientMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
Other Cardiovascular [Member] | Cardiovascular [Member]                        
Segment Reporting Information [Line Items]                        
Revenue                   240.3us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherCardiovascularMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
255.1us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherCardiovascularMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
248.5us-gaap_Revenues
/ us-gaap_ProductOrServiceAxis
= lly_OtherCardiovascularMember
/ us-gaap_StatementBusinessSegmentsAxis
= lly_CardiovascularMember
BI compounds [Member]                        
Segment Reporting Information [Line Items]                        
Other-net, (income) expense   92.0us-gaap_NonoperatingIncomeExpense
/ us-gaap_ProductOrServiceAxis
= lly_BiCompoundsMember
                   
BI compounds [Member] | Corporate, Non-Segment [Member]                        
Segment Reporting Information [Line Items]                        
Other-net, (income) expense                   $ 92.0us-gaap_NonoperatingIncomeExpense
/ us-gaap_ProductOrServiceAxis
= lly_BiCompoundsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
$ 0us-gaap_NonoperatingIncomeExpense
/ us-gaap_ProductOrServiceAxis
= lly_BiCompoundsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
$ 0us-gaap_NonoperatingIncomeExpense
/ us-gaap_ProductOrServiceAxis
= lly_BiCompoundsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateNonSegmentMember
Minimum [Member] | Sales Revenue, Goods, Net [Member]                        
Segment Reporting Information [Line Items]                        
Concentration Risk, Percentage                   8.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Minimum [Member] | Accounts Receivable [Member]                        
Segment Reporting Information [Line Items]                        
Concentration Risk, Percentage                   9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member] | Sales Revenue, Goods, Net [Member]                        
Segment Reporting Information [Line Items]                        
Concentration Risk, Percentage                   19.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
19.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
19.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Maximum [Member] | Accounts Receivable [Member]                        
Segment Reporting Information [Line Items]                        
Concentration Risk, Percentage                   18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember