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Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Loss Contingency, Information about Litigation Matters [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] Multi District Litigation MDL [Member] Multi District Litigation Mdl [Member] Product liability cases that are part of the MDL. Product Liability Litigation [Member] Product Liability Litigation [Member] Matters related to product liability litigation Lilly Portion [Member] Lilly Portion [Member] Lilly Portion [Member] Takeda Portion [Member] Takeda Portion [Member] Takeda Portion [Member] Employee Litigation [Member] Employee Litigation [Member] Employee Litigation [Member] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] CANADA CANADA ONTARIO ONTARIO QUEBEC QUEBEC ALBERTA ALBERTA CALIFORNIA CALIFORNIA Brazil [Member] BRAZIL Other states [Member] Other states [Member] Other states [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Damages from Product, Cancer [Member] Damages from Product, Cancer [Member] Damages from Product, Cancer [Member] Compensatory Damages [Member] Compensatory Damages [Member] Compensatory Damages [Member] Punitive Damages [Member] Punitive Damages [Member] Punitive Damages [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Byetta [Member] Byetta [Member] Byetta Cymbalta [Member] Cymbalta [Member] Cymbalta [Member] Prozac [Member] Prozac [Member] Prozac [Member] Actos [Member] Actos [Member] Actos [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Statement [Line Items] Statement [Line Items] Loss Contingency, Number of Lawsuits Number of lawsuits in a particular litigation or loss contingency. 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Profit and Development and Marketing Share [Member] Profit And Development And Marketing Share [Member] Share of profits, research and development expenses, and marketing expenses pursuant to the terms of a collaborative arrangement. Selling and Marketing Expense [Member] Selling and Marketing Expense [Member] Research and Development Exp [Member] Research and Development Expense [Member] Research and Development and Marketing and Selling Expense [Member] Research And Development And Marketing And Selling Expense [Member] R&D and Selling & Mktg Expense share pursuant to a collaborative arrangement. 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Lly Compounds [Member] Basaglar [Member] Basaglar [Member] Erbitux [Member] Erbitux [Member] Erbitux [Member] Effient [Member] Effient [Member] Effient [Member] Solanezumab [Member] Solanezumab [Member] Solanezumab [Member] Trajenta (BI) [Member] Trajenta (BI) [Member] Trajenta (BI) [Member] Jardiance (BI) [Member] Jardiance (BI) [Member] Jardiance (BI) [Member] Baricitinib [Member] Baricitinib [Member] Baricitinib [Member] Tanezumab [Member] Tanezumab [Member] Tanezumab [Member] BACE Inhibitor [Member] BACE (AZ) Inhibitor [Member] BACE Inhibitor (AZ) [Member] Collaboration and other revenue Other Revenue, Net Revenue Revenues Research and development Research and Development Expense Collaborative Arrangement, Rights and Obligations, Terms Collaborative Arrangement, Rights and Obligations, Terms Terms or rights and obligations under collaborative arrangements. Nonoperating Income (Expense) Nonoperating Income (Expense) Marketing, selling, and administrative Selling, General and Administrative Expense Collaborative Arrangement, Rights and Obligations, Amount Collaborative Arrangement, Rights and Obligations, Amount Label: Collaborative Arrangement, Rights and Obligations Element ID: us-gaap_CollaborativeArrangementRightsAndObligations Balance Type: na Data Type: MONETARY Period Type: duration --------------------------------------------------------------------- Definition: Description of rights and obligations under the collaborative arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-1 -Paragraph 21 -Subparagraph b Collaborative Arrangement, Rights and Obligations, Terms of Arrangement, Period Collaborative Arrangement, Rights and Obligations, Terms of Arrangement, Period Collaborative Arrangement, Rights and Obligations, Terms of Arrangement, Period Period over which a certain term (right or obligation) of a collaborative arrangement is to be recognized, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Collaborative Arrangement, Rights and Obligations Percent Description of rights and obligations under the collaborative arrangements, including but not limited to - percent share in various revenues and costs, percent interest earned on related party notes. 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Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Acquired in-process research and development Acquired in-process research and development The amount of EXPENSE related to research and development assets that are acquired in a business combination (pre-141R) and/or licensing arrangement that have no alternative future use and are therefore written off in the period of acquisition (INCOME STATEMENT) Sales Revenue, Goods, Net Sales Revenue, Goods, Net Amortization of Intangible Assets Amortization of Intangible Assets New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Changes and Error Corrections [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Assets Assets [Abstract] Current Assets Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Short-term Investments Accounts receivable, net of allowances of $44.7 (2016) and $44.3 (2015) Accounts Receivable, Net, Current Other receivables Other Receivables, Net, Current Inventories Inventory, Net Prepaid expenses and other Prepaid Expense, Current Total current assets Assets, Current Other Assets Assets, Noncurrent [Abstract] Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Investments Long-term Investments Goodwill Goodwill Other intangibles, net Intangible Assets, Net (Excluding Goodwill) Sundry Other 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liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Other Liabilities Liabilities, Noncurrent [Abstract] Long-term debt Long-term Debt, Excluding Current Maturities Accrued retirement benefits Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Long-term income taxes payable Accrued Income Taxes, Noncurrent Other noncurrent liabilities Other Liabilities, Noncurrent Total other liabilities Liabilities, Noncurrent Eli Lilly and Company Shareholders' Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Employee benefit trust Common Stock, Shares Held in Employee Trust Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Cost of common stock in treasury Treasury Stock, Value Total Eli Lilly and Company shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Description of Derivative Risk Management Policy Derivatives, Policy [Policy Text Block] Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Collaborations [Text Block] Collaborative Arrangement Disclosure [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Long-term Debt [Member] Long-term Debt [Member] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Fair Value Adjustment to Inventory [Member] Fair Value Adjustment to Inventory [Member] Adjustment to Return Reserve [Member] Adjustment to Return Reserve [Member] Adjustment to Return Reserve [Member] Other Pharmaceuticals [Member] Other Pharmaceuticals [Member] Revenue to unaffiliated customers, Other pharmaceuticals Other Endocrinology [Member] Other Endocrinology [Member] Other Endocrinology [Member] Total Endocrinology [Member] Endocrinology [Member] Revenue to unaffiliated customers, Endocrinology Humalog [Member] Humalog [Member] Humalog [Member] Humulin [Member] Humulin [Member] Humulin [Member] Forteo [Member] Forteo [Member] Forteo [Member] Trulicity [Member] [Member] Trulicity [Member] [Member] Trulicity [Member] [Member] Zyprexa [Member] Zyprexa [Member] Zyprexa [Member] Strattera [Member] Strattera [Member] Strattera [Member] Other 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Line of Credit Facility, Remaining Borrowing Capacity Short-term Debt Short-term Debt Repayments of Long-term Debt Repayments of Long-term Debt Available-for-sale Securities, Debt Securities Available-for-sale Securities, Debt Securities Liabilities, Fair Value Disclosure, Nonrecurring Liabilities, Fair Value Disclosure, Nonrecurring Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents, Fair Value Disclosure Long-term Debt Long-term Debt Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Extinguishment of Debt, Amount Extinguishment of Debt, Amount Derivative Assets, Current Derivative Asset, Current Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets Maximum Remaining Maturity of Foreign Currency Derivatives Maximum Remaining Maturity of Foreign Currency Derivatives Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Description of Derivative Activity Volume Percent Label: Description of Derivative Activity Volume Element ID: us-gaap_DescriptionOfDerivativeActivityVolume Balance Type: na Data Type: PERCENT Period Type: duration --------------------------------------------------------------------- Definition: Information that would enable users to understand the volume of the entity's derivative activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44 -Subparagraph 2 Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative Assets, Noncurrent Derivative Asset, Noncurrent Derivative Liabilities, Current Derivative Liability, Current Business Combination, Contingent Consideration, Liability, Current Business Combination, Contingent Consideration, Liability, Current Business Combination, Contingent Consideration, Liability, Noncurrent Business Combination, Contingent Consideration, Liability, Noncurrent Derivative Liabilities, Noncurrent Derivative Liability, Noncurrent Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available-for-sale Securities, Continuous Unrealized Gain Position, Fair Value ------------------------------------------ Definition: This item represents the fair value of securities in an unrealized gain position which are categorized neither as held-to-maturity nor trading securities. Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Other than Temporary Impairment Losses, Investments Other than Temporary Impairment Losses, Investments Proceeds from Sale and Maturity of Available-for-sale Securities Proceeds from Sale and Maturity of Available-for-sale Securities Available-for-sale Securities, Gross Realized Losses Available-for-sale Securities, Gross Realized Losses Available-for-sale Securities, Current [Abstract] Available-for-sale Securities, Current [Abstract] Available-for-sale Securities, Debt Securities, Current Available-for-sale Securities, Debt Securities, Current Available-for-sale Securities, Equity Securities, Current Available-for-sale Securities, Equity Securities, Current Available-for-sale Securities, Current, Total Available-for-sale Securities, Current Available-for-sale Securities, Noncurrent [Abstract] Available-for-sale Securities, Noncurrent [Abstract] Available-for-sale Securities, Debt Securities, Noncurrent Available-for-sale Securities, Debt Securities, Noncurrent Available-for-sale Securities, Equity Securities, Noncurrent Available-for-sale Securities, Equity Securities, Noncurrent Other Long-term Investments Other Long-term Investments Available-for-sale Securities, Noncurrent, Total Available-for-sale Securities, Noncurrent Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Derivative Liability, Notional Amount Derivative Liability, Notional Amount Derivative Asset, Notional Amount Derivative Asset, Notional Amount Net payments for terminations of interest rate swaps Payments for (Proceeds from) Hedge, Operating Activities The net cash outflow or inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations. Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net Notional Amount of Nonderivative Instruments Derivative, Remaining Maturity Derivative, Remaining Maturity Derivative, Notional Amount Derivative, Notional Amount Investment Income, Interest Investment Income, Interest Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Nonoperating Income (Expense) Statement of Cash Flows [Abstract] Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Net Cash Provided by Operating Activities [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash Flows from Operating Activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Net Income (Loss) Attributable to Parent Adjustments to Reconcile Net Income to Cash Flows from Operating Activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Change in deferred income taxes Increase (Decrease) in Deferred Income Taxes Stock-based compensation expense Share-based Compensation Other changes in operating assets and liabilities, net of acquisitions and divestitures Increase (Decrease) in Other Operating Assets and Liabilities, Net Other non-cash operating activities, net Other Operating Activities, Cash Flow Statement Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Net Cash Used in Investing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] Cash Flows from Investing Activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Net purchases of property and equipment Payments for (Proceeds from) Productive Assets Proceeds from sales and maturities of short-term investments Proceeds from Sale of Short-term Investments Purchases of short-term investments Payments to Acquire Short-term Investments Proceeds from sales of noncurrent investments Proceeds from Sale of Long-term Investments Purchases of noncurrent investments Payments to Acquire Long-term Investments Restricted cash released for acquisition Increase (Decrease) in Restricted Cash Cash paid for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sale of product rights Proceeds from Sale of Productive Assets Purchase of in-process research and development Purchased in-process research and development The amount of CASH paid for research and development assets that are acquired in a business combination (pre-141R) and/or licensing arrangement that have no alternative future use and are therefore, written off in the period of acquisition (CASH FLOWS). Purchase of product rights Payments to Acquire Intangible Assets Other investing activities, net Payments for (Proceeds from) Other Investing Activities Net Cash Used for Investing Activities Net Cash Provided by (Used in) Investing Activities Net Cash Used in Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Dividends paid Payments of Dividends Net change in short-term borrowings Proceeds from (Repayments of) Short-term Debt Repayment of long-term debt Purchases of common stock Payments for Repurchase of Common Stock Other financing activities, net Proceeds from (Payments for) Other Financing Activities Net Cash Used for Financing Activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at January 1 Cash and Cash Equivalents at September 30 Accounting Policies [Abstract] Business Combinations Policy [Policy Text Block] Business Combinations Policy [Policy Text Block] Stockholders' Equity Note [Abstract] Treasury Stock, Value, Acquired, Cost Method Treasury Stock, Value, Acquired, Cost Method Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Receivables, Net, Current [Abstract] Allowances for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Nonoperating Income (Expense) [Abstract] Investment Income, Interest Foreign Currency Transaction Gain (Loss), Realized Other (income)expense Nonoperating Income (Expense), Total Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension Plans, Defined Benefit [Member] Pension Plan [Member] Other Postretirement Benefit Plans, Defined Benefit [Member] Other Postretirement Benefit Plan [Member] Defined Benefit Plan, Service Cost Defined Benefit Plan, Service Cost Defined Benefit Plan, Interest Cost Defined Benefit Plan, Interest Cost Defined Benefit Plan, Expected Return on Plan Assets Defined Benefit Plan, Expected Return on Plan Assets Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Defined Benefit Plan, Actuarial Gain (Loss) Defined Benefit Plan, Actuarial Gain (Loss) Defined Benefit Plan, Net Periodic Benefit Cost, Total Defined Benefit Plan, Net Periodic Benefit Cost Pension Contributions Pension Contributions Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Pension And Other Postretirement Benefit Contributions, Estimated Future Discretionary Contributions Pension And Other Postretirement Benefit Contributions, Discretionary Contributions Pension And Other Postretirement Benefit Contributions, Discretionary Contributions Definition: The amount of discretionary cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its postretirement benefit plans. Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Domain] Subsegments Consolidation Items [Domain] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Segment Information [Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Other - Net, Expense (Income) [Text Block] Other Income and Other Expense Disclosure [Text Block] Retirement Benefits [Text Block] Pension and Other Postretirement Benefits Disclosure [Text Block] Income Statement [Abstract] Costs, expenses, and other: Costs and Expenses [Abstract] Cost of sales Asset impairment, restructuring, and other special charges Other - net, (income) expense Cost of sales, operating expenses, and other-net Cost of sales, operating expenses, and other-net Cost of sales, operating expenses, and other-net Income before income taxes Income taxes Income Tax Expense (Benefit) Net income Earnings per share: Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Shares used in calculation of earnings per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Dividends paid per share Common Stock, Dividends, Per Share, Cash Paid Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Basis of Presentation [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Accumulated Translation Adjustment [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member] Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, before Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, before Tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax Other Comprehensive Income, Other, Net of Tax Other Comprehensive Income, Other, Net of Tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Other Comprehensive Income (Loss), Tax Other Comprehensive Income (Loss), Tax Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Other Nonoperating Income (Expense) [Table Text Block] Selling, General and Administrative Expenses [Member] Selling, General and Administrative Expenses [Member] Diabetes Collaboration [Member] Diabetes Collaboration [Member] Diabetes Collaboration [Member] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table Text Block] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table Text Block] Unusual or Infrequent Items, or Both [Abstract] IRELAND IRELAND Severance Costs Severance Costs Asset Impairment Charges Asset Impairment Charges Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Note Disclosure [Text Block] Schedule of Net Benefit Costs [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Restructuring and Related Activities Disclosure [Text Block] Restructuring, Impairment, and Other Activities Disclosure [Text Block] Amortization of Fair Value Adjusted Intangible Assets [Member] Amortization of Fair Value Adjusted Intangible Assets [Member] Amortization of Fair Value Adjusted Intangible Assets [Member] Acquisition-related Costs [Member] Acquisition-related Costs [Member] Major Property Class [Axis] Major Property Class [Axis] Major Property Class [Domain] Major Property Class [Domain] Discontinued Operations, Held-for-sale [Member] Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] U.S. Sentinel Product Line [Member] U.S. Sentinel Product Line [Member] U.S. Sentinel Product Line [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed Technology Rights [Member] Developed Technology Rights [Member] Customer Relationships [Member] Customer Relationships [Member] Boehringer Ingelheim Vetmedica, Inc.'s U.S. Vaccine Portfolio [Member] Boehringer Ingelheim Vetmedica, Inc.'s U.S. Vaccine Portfolio [Member] Boehringer Ingelheim Vetmedica, Inc.'s U.S. Feline, Canine, and Rabies Vaccine Portfolio Immunocore Limited [Member] Immunocore Limited [Member] Immunocore Limited [Member] AstraZeneca [Member] AstraZeneca [Member] AstraZeneca [Member] Innovent Biologics, Inc. [Member] Innovent Biologics, Inc. [Member] Innovent Biologics, Inc. [Member] Hanmi Pharmaceutical Co., Ltd. [Member] Hanmi Pharmaceutical Co., Ltd. [Member] Hanmi Pharmaceutical Co., Ltd. [Member] BioNTech AG [Member] BioNTech AG [Member] BioNTech AG [Member] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Business Combination, Consideration Transferred Business Combination, Consideration Transferred Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles, Other Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles, Other Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles, Other Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Business Combination, Consideration Transferred Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Proceeds from Divestiture of Businesses Proceeds from Divestiture of Businesses Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets held for sale Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Payments to Acquire Businesses, Net of Cash Acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Purchased in-process research and development Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Acquisitions [Text Block] Business Combination Disclosure [Text Block] Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Available-for-sale Securities [Table Text Block] Available-for-sale Securities [Table Text Block] Gain (Loss) on Investments [Table Text Block] Gain (Loss) on Investments [Table Text Block] Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]