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[Member] Dermira, Inc. [Member] 1-5 Years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Revenue, information used to determine revenue recognized, change in accounting estimate, percent Revenue, Information Used To Determine Revenue Recognized, Change In Accounting Estimate, Percent Revenue, Information Used To Determine Revenue Recognized, Change In Accounting Estimate, Percent Liabilities and Equity Liabilities and Equity [Abstract] Deferred tax liabilities Deferred Income Tax Liabilities, Net Loxo Oncology, Inc. Loxo Oncology, Inc. [Member] Loxo Oncology, Inc. [Member] Receivables, Net, Current [Abstract] Receivables, Net, Current [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Other intangibles, net Intangible Assets, Net (Excluding Goodwill) Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Retirement of treasury shares Treasury Stock, Retired, Cost Method, Amount Cash flow hedges: Cash Flow Hedge [Abstract] Cash Flow Hedge [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Total current liabilities Liabilities, Current Marketable equity securities Marketable Securities [Member] Marketable Securities [Member] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Severance Severance Costs Schedule of amounts recorded for contract liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Limited initial market entry, supply term Loss Contingency, Claims Settled And Dismissed, Limited Initial Market Entry, Supply Term Loss Contingency, Claims Settled And Dismissed, Limited Initial Market Entry, Supply Term Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Commitments and Contingencies (Note 10) Commitments and Contingencies Noncurrent investments, debt securities Debt Securities, Available-for-sale, Noncurrent Purchases of common stock Payments for Repurchase of Common Stock Assets Assets [Abstract] Stock-based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Income taxes payable Taxes Payable, Current Entity Shell Company Entity Shell Company Cover [Abstract] Cover [Abstract] Accounts payable Accounts Payable, Current Document Type Document Type Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Other receivables Derivative Asset, Current Retained earnings Retained Earnings (Accumulated Deficit) Useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Purchase of treasury shares (in shares) Treasury Stock, Shares, Acquired Eli Lilly and Company Shareholders’ Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Derivative liability, notional amount Derivative Liability, Notional Amount Earnings from continuing operations - diluted (usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Hedging Designation [Domain] Hedging Designation [Domain] Junshi Biosciences Co., Ltd. Junshi Biosciences [Member] Junshi Biosciences Earnings from discontinued operations - diluted (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Document Quarterly Report Document Quarterly Report Evox Therapeutics Ltd. 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Effective portion of losses on interest rate contracts reclassified from accumulated other comprehensive loss Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Business Combinations [Abstract] Business Combinations [Abstract] AC Immune SA AC Immune SA [Member] AC Immune SA [Member] Basaglar® Basaglar Basaglar [Member] Basaglar [Member] Increase (Decrease) in Shareholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Royalty Agreement Terms Royalty Agreement Terms [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Revenue Disposal Group, Including Discontinued Operation, Revenue Prepaid expenses and other Prepaid Expense, Current Shares used in calculation of earnings per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Schedule of the amounts recognized for assets acquired and liabilities assumed as of the acquisition date Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary certain fair value information Fair Value, Assets Measured on Recurring Basis [Table Text Block] Amendment Flag Amendment Flag Other, net of tax Accumulated Gain (Loss), Net, Cash Flow Hedge And Foreign Currency Adjustment, Including Portion Attributable To Noncontrolling Interest [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge And Foreign Currency Adjustment, Including Portion Attributable To Noncontrolling Interest Number of patents Loss Contingency, Number Of Patents Loss Contingency, Number Of Patents Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Short-term investments, debt securities Debt Securities, Available-for-sale, Current Derivative Instrument [Axis] Derivative Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Fair value, by balance sheet grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Net change in short-term borrowings Proceeds from Short-term Debt Senior Notes Senior Notes [Member] Description of Derivative Risk Management Policy Derivatives, Policy [Policy Text Block] Geographical [Axis] Geographical [Axis] Local Phone Number Local Phone Number Retirement benefit plans Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Taltz® Taltz [Member] Taltz [Member] Unrealized gross gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Long-term income taxes payable Accrued Income Taxes, Noncurrent Allowances for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Verzenio® Verzenio [Member] Verzenio [Member] Effective portion of cash flow hedges Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] Schedule of effective portion of risk-management instruments that was recognized in other comprehensive income (loss), net investment hedges Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Pretax net losses on cash flow hedges expected to be reclassified during the next 12 months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Marketing, selling, and administrative Selling, General and Administrative Expense Other securities, current investments Other Debt Obligations [Member] Derivative, notional amount Derivative, Notional Amount Foreign currency exchange contracts Foreign Exchange Contract [Member] Entity Current Reporting Status Entity Current Reporting Status Other noncurrent assets Other Assets, Noncurrent Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Total assets Assets Other current liabilities Derivative Liability, Current Equity method investments Equity Method And Other Investments [Member] Equity Method and Other Investments [Member] Discontinued operations cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Disposal Group Classification [Axis] Disposal Group Classification [Axis] ImmuNext, Inc. ImmuNext, Inc. [Member] ImmuNext, Inc. [Member] Equity securities, net unrealized gains and (losses) Equity Securities, FV-NI, Gain (Loss) Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Deconsolidation of Elanco Noncontrolling Interest, Decrease from Deconsolidation Entity Small Business Entity Small Business Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Other assets and liabilities - net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets and Liabilities, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets and Liabilities, Net Avidity Biosciences, Inc. Avidity Biosciences, Inc. [Member] Avidity Biosciences, Inc. Interest expense Interest Expense Acquired IPR&D Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Acquired In-Process Research And Development Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Acquired In-Process Research And Development Acquisitions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Other Oncology Other Oncology [Member] Other Oncology [Member] Other Stockholders' Equity, Other Depreciation and amortization Depreciation, Depletion and Amortization Entity Filer Category Entity Filer Category Discontinued Operations Discontinued Operations [Member] Summary of the amount of unrealized gains and losses (pretax) recognized in our statement of operations for equity securities Unrealized Gain (Loss) on Investments [Table Text Block] Product and Service [Axis] Product and Service [Axis] Entity Address, City or Town Entity Address, City or Town Effect from interest rate contracts Change in 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Beginning balance (in shares) Ending balance (in shares) Shares, Issued Earnings from continuing operations - basic (usd per share) Income (Loss) from Continuing Operations, Per Basic Share Litigation Case [Axis] Litigation Case [Axis] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Operating Activities [Domain] Operating Activities [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Swap Swiss Francs to U.S. Dollars Swap Swiss Francs To U.S. Dollars [Member] Swap Swiss Francs To U.S. Dollars [Member] Income before income taxes Total before tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Research and development Research and Development Expense Collaboration and other revenue associated with prior period transfers of intellectual property Royalty [Member] Erbitux® Erbitux [Member] Erbitux [Member] Cash paid for acquisitions, net of cash acquired (Note 3) Payments to Acquire 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[Member] Eli Lilly And Company [Member] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Asset Impairment, Restructuring, and Other Special Charges Restructuring, Impairment, and Other Activities Disclosure [Text Block] Tanezumab Tanezumab [Member] Tanezumab [Member] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Accounts receivable, net of allowances of $26.6 (2020) and $22.4 (2019) Accounts Receivable, after Allowance for Credit Loss, Current Disposition of ownership interest Noncontrolling Interest, Ownership Percentage by Parent Unrealized gross losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Cymbalta® Cymbalta [Member] Cymbalta [Member] Effective Portion of Cash Flow Hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Goodwill Goodwill Less Than 1 Year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44 -Subparagraph 2 AbCellera Biologics Inc. AbCellera Biologics Inc. [Member] AbCellera Biologics Inc. [Member] Zyprexa® Zyprexa [Member] Zyprexa [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Short-term investments (Note 7) Short-term Investments