Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Xalabrands Xalabrands [Member] Xalabrands Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Other Assets Schedule of Other Assets, Noncurrent [Table Text Block] Amortization of prior service costs Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax Maximum Maximum [Member] Range [Domain] Statistical Measurement [Domain] Common stock repurchase Treasury Stock, Value, Acquired, Cost Method, Net Of Excise Tax Treasury Stock, Value, Acquired, Cost Method, Net Of Excise Tax Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Segment Reporting [Abstract] Segment Reporting [Abstract] Expected Amortization Expense Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Restructuring Plan [Axis] Restructuring Plan [Axis] Common stock: $0.01 par value, 3,000,000,000 shares authorized; shares issued: 1,258,606,697 and 1,245,391,929 as of March 31, 2026 and December 31, 2025 Common Stock, Value, Issued Respiratory delivery platform Respiratory delivery platform [Member] Respiratory delivery platform [Member] Nonvested Restricted Stock and Restricted Stock Unit Awards Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Taxes paid related to net share settlement of equity awards Payment, Tax Withholding, Share-Based Payment Arrangement Interest expense Interest Expense, Operating and Nonoperating Payroll and employee benefit liabilities Employee-related Liabilities, Current Pension and Other Postretirement Benefits Disclosure Retirement Benefits [Text Block] Loss Contingency Accrual Loss Contingency Accrual 2020 Stock Incentive Plan and 2003 Long-Term Incentive Plan 2020 Stock Incentive Plan and 2003 Long-Term Incentive Plan [Member] 2020 Stock Incentive Plan and 2003 Long-Term Incentive Plan Restatement Determination Date Restatement Determination Date Pension and other postretirement benefits Other Pension, Postretirement and Supplemental Plans [Member] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Yupelri ® Yupelri ® [Member] Yupelri ® Derivative Instruments Risk [Axis] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Proceeds from the sale of property, plant and equipment Proceeds from Sale of Productive Assets Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Current liabilities: Liabilities, Current [Abstract] Accrued sales allowances Other Sundry Liabilities, Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Intellectual Property Developed Technology Rights [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Gains and Losses on Net Investment Hedges AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent [Member] Asset-backed Securities Asset-Backed Securities [Member] 2032 Euro Senior Notes 2032 Euro Senior Notes [Member] 2032 Euro Senior Notes 2043 Senior Notes (5.400% coupon) SeniorNotesTwoThousandFortyThree [Member] Senior notes two thousand forty three 2026 Restructuring Program 2026 Restructuring Program [Member] 2026 Restructuring Program Viagra ® Viagra ® [Member] Viagra ® Loss Contingencies [Table] Loss Contingencies [Table] Total intangible asset amortization expense (including disposal & impairment charges) Amortization De-designated notional amount Derivative Asset, De-Designated Notional Amount Derivative Asset, De-Designated Notional Amount Currency Swap December 2027 Currency Swap December 2027 [Member] Currency Swap December 2027 Cash dividends paid Payments to Noncontrolling Interests Change in unrecognized loss and prior service cost related to defined benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common Stock, Par or Stated Value Per Share Ordinary shares, nominal value Common Stock, Par or Stated Value Per Share Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] EpiPen® Auto-Injectors EpiPen® Auto-Injectors [Member] EpiPen® Auto-Injectors Intangible assets, net Intangible assets, net book value, excluding goodwill Intangible Asset, Excluding Goodwill, after Accumulated Amortization Number of restricted stock awards, nonvested beginning of period Number of restricted stock awards, nonvested end of period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Derivative, notional amount Derivative, Notional Amount Basic (in shares) Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Accumulated impairment loss Goodwill, Impaired, Accumulated Impairment Loss Retirement Benefits [Abstract] Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Arrangements and Non-arrangement Transactions [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Work in process Inventory, Work in Process, Net of Reserves Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Entity Address, City or Town Entity Address, City or Town Number of restricted stock awards, granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Number of restricted stock awards, released Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Maximum expected number of positions eliminated, percent Restructuring and Related Cost, Maximum Expected Number of Positions Eliminated, Percent Restructuring and Related Cost, Maximum Expected Number of Positions Eliminated, Percent Finite-lived intangible assets, net book value Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net earnings (loss) Net earnings (loss) attributable to Viatris Inc. common shareholders Net earnings (loss) Net Income (Loss) Available to Common Stockholders, Basic Level 2 Fair Value, Inputs, Level 2 [Member] Finite-lived intangible assets, accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Receivable [Domain] Receivable [Domain] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Contingent consideration payments Payments of Merger Related Costs, Financing Activities Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive (loss) earnings, net of tax Other comprehensive loss, net of tax Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Current portion of long-term debt and other long-term obligations Long-Term Debt, Current Maturities Facility Damage Facility Damage [Member] Facility Damage Other Exit Costs Other Restructuring [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Disaggregation of Revenue, Variable Consideration Disaggregation of Revenue, Variable Consideration [Table Text Block] Disaggregation of Revenue, Variable Consideration Other comprehensive earnings (loss) before reclassifications, before tax OCI, before Reclassifications, before Tax, Attributable to Parent Less: Treasury stock — at cost Treasury Stock, Value Treasury Stock, Value Earnings per Share Earnings Per Share, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] Reconciliation of Segment Information to Total Consolidated Information Segment Reporting [Table Text Block] Other comprehensive earnings (loss), before tax: Other Comprehensive Income (Loss), before Tax [Abstract] Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Short-term Debt [Abstract] Short-Term Debt [Abstract] Long-term debt Long-term debt Long-Term Debt Legal and professional accruals, including litigation accruals Estimated Litigation Liability, Current Income taxes Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Security Exchange Name Security Exchange Name Other Current Portion of Long-term Debt Other Current Portion of Long-term Debt [Member] Other Current Portion of Long-term Debt [Member] Potential damages, annual payments, period Loss Contingency, Potential Damages, Annual Payments, Period Loss Contingency, Potential Damages, Annual Payments, Period Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Purchase of marketable securities Payments to Acquire Marketable Securities Financial and Nonfinancial Liabilities, Fair Value Disclosure Liabilities, Fair Value Disclosure Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Operating lease liability Operating Lease, Liability, Current Ordinary shares reserved for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Accrued interest Interest Payable, Current Japan, Australia and New Zealand Segment Japan, Australia and New Zealand Segment [Member] Japan, Australia and New Zealand Segment Segment Reporting Segment Reporting, Policy [Policy Text Block] Property, Plant, and Equipment Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Earnings (Loss) per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Proceeds from the sale of marketable securities Proceeds from Sale and Maturity of Marketable Securities Earnings (loss) per share attributable to Viatris Inc. shareholders Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Equity securities (1) Debt Securities, Trading, and Equity Securities, FV-NI Total liabilities Liabilities Trading Symbol Trading Symbol Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] In-process research and development Intangible Asset, Excluding Goodwill, Indefinite-Lived Capital expenditures Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Total Viatris Inc. equity, before treasury stock Stockholders Equity Parent Before Treasury Stock Total amount of stockholders' equity (deficit) items including stock value, paid in capital, retained earnings that are attributable to the parent company, excluding equity attributable to noncontrolling interests, and before deducting the carrying value of treasury stock. Income taxes payable Accrued Income Taxes, Current Paul Campbell [Member] Paul Campbell Company Selected Measure Name Company Selected Measure Name Litigation settlements and other contingencies, net Litigation settlements and other contingencies, net Gain (Loss) from Litigation Settlement Schedule of Cash, cash equivalents, and restricted cash Schedule of Cash, Cash Equivalents and Restricted Cash [Table Text Block] [Table Text Block] for Schedule of Cash, Cash Equivalents and Restricted Cash [Table] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Amounts reclassified from accumulated other comprehensive earnings (loss), before tax: Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Trade receivables assigned and derecognized Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds Defined Pension Plan Items Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Total Long-Term Debt, Gross Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Equity Securities, FV-NI, Cost Equity Securities, FV-NI, Cost Available-for-sale fixed income investments Debt Securities [Member] Asset Class [Domain] Asset Class [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other Other Sundry Liabilities, Noncurrent Other receivables Other Receivables, Net, Current 2048 Senior Notes (5.200%) SeniorNotesTwoThousandFortyEight [Member] SeniorNotesTwoThousandFortyEight [Member] Balance (in shares) Balance (in shares) Shares, Issued Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Total dilutive shares outstanding Weighted Average Number of Shares Outstanding, Diluted Revenue Recognition And Accounts Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Dividends paid (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Prepaid Expenses and Other Current Assets Schedule of Other Current Assets [Table Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent 2026 Senior Notes (3.950% coupon) SeniorNotesTwoThousandTwentySix3.95Precent [Member] 2026 Senior Notes 3.950% U.S. Treasuries US Treasury Securities [Member] Type of Arrangement and Non-arrangement Transactions [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Cumulative shares repurchased (in shares) Treasury Stock, Shares, Acquired, Cumulative Treasury Stock, Shares, Acquired, Cumulative Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Fair value of financial instruments Derivative Liability, Subject to Master Netting Arrangement, before Offset Gross profit Gross Profit Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Citalopram Litigation Citalopram Litigation [Member] Citalopram Litigation Other operating assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net SeniorNotesTwoThousandTwentyEight [Member] SeniorNotesTwoThousandTwentyEight [Member] SeniorNotesTwoThousandTwentyEight [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Components of Other Comprehensive Loss Comprehensive Income (Loss) [Table Text Block] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Share-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Biocon Biologics Biocon Biologics [Member] Biocon Biologics Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Notional amount of derivative Derivative Asset, Notional Amount Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Weighted average number diluted shares outstanding adjustment, stock-based awards and warrants Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Acquired IPR&D Other Research And Development Expense (Refund) Other Research And Development Expense (Refund) Weighted average grant-date fair value per share, nonvested beginning of period Weighted average grant-date fair value per share, nonvested end of period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Plan Name [Domain] Plan Name [Domain] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Selling, general and administration Selling, General and Administrative Expense, Adjusted Selling, General and Administrative Expense, Adjusted Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Other Research and Development Refund Other Research and Development Refund Other Research and Development Refund Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Basic and Diluted Earnings per Ordinary Share Attributable to Mylan N.V. Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Balance Sheet Components [Abstract] Balance Sheet Components [Abstract] Balance Sheet Components Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date 2029 Long-Term Debt, Maturity, Year Four Payments Business Combination Contingent Consideration Liability Payments, Current Business Combination Contingent Consideration Liability Payments, Current Hedging Relationship [Axis] Hedging Relationship [Axis] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Liabilities Liabilities [Abstract] Finite-lived Intangible Assets Amortization Expense Intangible Asset, Finite-Lived, Amortization Expense [Table Text Block] Effect on cash of changes in exchange rates Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Rebates, promotional programs and other sales allowances Accrued Sales Allowances Accrued Sales Allowances Accrued Sales Allowances Total equity Balance Balance Equity, Including Portion Attributable to Noncontrolling Interest Average remaining contractual term for stock awards outstanding, in years Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Returns Revenue from Contract with Customer, Returns Revenue from Contract with Customer, Returns Revenue from Contract with Customer, Returns Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Buildings and improvements Building and Building Improvements [Member] Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Issuance of common stock Proceeds from Issuance of Common Stock 2027 Senior Notes 2027 Senior Notes [Member] 2027 Senior Notes Foreign currency translation Goodwill, Foreign Currency Translation and Measurement Period Adjustments Ordinary shares, shares authorized Common Stock, Shares Authorized Trade accounts payable Accounts Payable, Trade Finite-lived intangible assets, estimated useful life, in years Intangible Asset, Finite-Lived, Useful Life Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Plans to terminate Defined Benefit Plan, Plans To Terminate Defined Benefit Plan, Plans To Terminate Exercise Price Award Exercise Price Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Segment Reporting [Line Items] Segment Reporting [Line Items] Share repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Total unrecognized compensation expense, net of estimated forfeitures Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Proceeds from sale and collection of receivables Proceeds from Sale and Collection of Receivables Interest rate swaps Interest Rate Swap [Member] Debt Debt Disclosure [Text Block] Multi District Litigation Multi District Litigation [Member] Multi District Litigation [Member] Convertible Preferred Stock Convertible Preferred Stock [Member] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Restructuring - employee related Restructuring and Related Costs [Table Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Beginning Balance Ending Balance Restructuring Reserve Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Accounts payable Accounts payable Accounts Payable, Trade, Current Potential damages, annual payments Loss Contingency, Potential Damages, Annual Payments Loss Contingency, Potential Damages, Annual Payments Foreign exchange derivative assets Foreign Currency Contract, Asset, Fair Value Disclosure Foreign currency forward contracts Foreign Exchange Contract [Member] Adoption Date Trading Arrangement Adoption Date Corporate costs Corporate costs Corporate costs Thereafter Long-Term Debt, Maturity, after Year Five Counterparty Name [Domain] Counterparty Name [Domain] Balance at December 31, 2025, net of tax Balance at March 31, 2026, net of tax Equity, Attributable to Parent Long-Term Portion Business Combination, Contingent Consideration, Noncurrent [Abstract] Business Combination, Contingent Consideration, Noncurrent Stated percentage rate Debt Instrument, Interest Rate, Stated Percentage Cash dividends declared, per common share Dividends, Common Stock, Cash Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Restructuring Type [Axis] Restructuring Type [Axis] ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other Liabilities, Current [Abstract] Other Liabilities, Current [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Insider Trading Policies and Procedures [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Other items, net Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Deferred income tax benefit Deferred Income Tax Expense (Benefit) Selling, general and administrative Selling, General and Administrative Expense Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Patents and technologies Patents [Member] Cost of sales Cost of Product and Service Sold, Adjusted Cost of Product and Service Sold, Adjusted Type of Restructuring [Domain] Type of Restructuring [Domain] Business Combination [Domain] Business Combination [Domain] Litigation Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] 2046 Senior Notes (5.250% coupon) SeniorNotesTwoThousandFortySix5.25Precent [Member] 2046 Senior Note (5.250%) Payments for derivative Instruments Payments for Derivative Instrument, Financing Activities Estimated litigation liability Estimated Litigation Liability Anti-dilutive stock options or restricted stock awards excluded from computation of earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted stock awards Restricted Stock Units (RSUs) [Member] Changes in Carrying Amount of Goodwill Goodwill [Table Text Block] Number of women's healthcare product rights sold Number Of Women's Healthcare Products Sold Number Of Women's Healthcare Products Sold Generics Generics [Member] Generics Entity Central Index Key Entity Central Index Key Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate / Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination [Axis] Business Combination [Axis] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Utilization Restructuring and Related Cost, Incurred Cost Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Acquired IPR&D Payments To Acquire In Process Research And Development, Other Payments To Acquire In Process Research And Development, Other Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Viatris Inc. shareholders’ equity Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Total Contingent Consideration Business Combination, Contingent Consideration, Liability [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Deferred income tax benefit Deferred Income Tax Assets, Net Operating expenses: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] 2028 Euro Senior Notes 2028 Euro Senior Notes [Member] 2028 Euro Senior Notes [Member] Components of Intangible Assets Intangible Asset, Finite-Lived [Table Text Block] Payments Business Combination Contingent Consideration Liability Payments, Noncurrent Business Combination Contingent Consideration Liability Payments, Noncurrent Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] City Area Code City Area Code Reclassifications Business Combination, Contingent Consideration Arrangements, Reclassifications, Current Business Combination, Contingent Consideration Arrangements, Reclassifications, Current Accumulated Other Comprehensive Loss Totals AOCI Attributable to Parent [Member] Schedule of Activity in Contingent Consideration [Roll Forward] Schedule of Activity in Contingent Consideration [Roll Forward] Schedule of Activity in Contingent Consideration [Roll Forward] All Individuals All Individuals [Member] Collaborative Arrangement Collaborative Arrangement [Member] Fair value of long-term debt Debt Instrument, Fair Value Disclosure Creon ® Creon ® [Member] Creon ® Employee benefit liabilities Liability, Defined Benefit Pension Plan, Noncurrent Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Contingent consideration Balance at beginning of period Balance at end of period Business Combination, Contingent Consideration, Liability, Noncurrent Weighted-average period over which total unrecognized compensation expense expected to be recognized, in years Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Equity issued to acquire business Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] Total assets Assets Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Current Portion of Long-Term Debt Current Portion of Long-Term Debt [Member] Number of states Number of states Number of states Operating Segment Operating Segments [Member] 2050 Senior Notes 2050 Senior Notes [Member] 2050 Senior Notes Share-Based Incentive Plan Share-Based Payment Arrangement [Text Block] Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] 2027 Long-Term Debt, Maturity, Year Two Other long-term obligations Other long-term obligations Other Liabilities, Noncurrent Goodwill Goodwill, net, beginning balance Goodwill Goodwill Retirement Plan Type [Axis] Retirement Plan Type [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Weighted average grant-date fair value per share, granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Anticompetitive Conduct with Generic Drugs Anticompetitive Conduct with Generic Drugs [Member] Anticompetitive Conduct with Generic Drugs [Member] Currency Swap December 2026 Currency Swap December 2026 [Member] Currency Swap December 2026 Subsequent Event Type [Domain] Subsequent Event Type [Domain] Land and improvements Land and Land Improvements [Member] Operating lease liability Operating Lease, Liability, Noncurrent Retained Deficit Retained Earnings [Member] Developed Markets Segment Developed Markets Segment [Member] Developed Markets Segment Total operating expenses Operating Expenses Other Other Long Term Debt [Member] Other long term debt. Revolving Credit Facility Revolving Credit Facility [Member] Money market funds Money Market Funds [Member] Weighted average grant-date fair value per share, forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Gains and Losses on Available-For-Sale Fixed Income Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Amortization of actuarial gain included in SG&A Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Current Portion Business Combination, Contingent Consideration, Current [Abstract] Business Combination, Contingent Consideration, Current Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Foreign currency translation Restructuring Reserve, Translation and Other Adjustment Foreign Currency Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Celebrex ® Celebrex ® [Member] Celebrex ® Diluted (in USD per share) Diluted earnings (loss) per ordinary share Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation 2028 Senior Notes [Member] 2028 Senior Notes [Member] 2028 Senior Notes [Member] [Member] Total Shareholder Return Amount Total Shareholder Return Amount Taxes related to the net share settlement of equity awards Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Cash Flow Hedging Cash Flow Hedging [Member] Other Assets, Noncurrent [Abstract] Other Assets, Noncurrent [Abstract] Litigation Case Type [Domain] Litigation Case [Domain] Damages to be paid Loss Contingency, Damages Paid, Value Intangible asset amortization expense Intangible asset amortization expense Intangible Asset, Finite-Lived, Amortization Expense Research and development Research and development Research and Development Expense 2028 Long-Term Debt, Maturity, Year Three Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Income tax provision (benefit) Reclassification from AOCI, Current Period, Tax Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, plant and equipment, net Property, plant and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Net sales Net sales Revenue from Contract with Customer, Excluding Assessed Tax Interest cost Defined Benefit Plan, Interest Cost Accretion Accretion Expense, Current Accretion Expense, Current Financial Instruments [Domain] Financial Instruments [Domain] Reclassifications Business Combination, Contingent Consideration Arrangements, Reclassifications Business Combination, Contingent Consideration Arrangements, Reclassifications Share lock up period Business Combination, Consideration Transferred, Equity Interest, Share Lock Up Period Business Combination, Consideration Transferred, Equity Interest, Share Lock Up Period Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Goodwill and Intangible Assets Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Intangible assets, gross, excluding goodwill Intangible Asset, Excluding Goodwill, before Accumulated Amortization Lyrica ® Lyrica ® [Member] Lyrica ® Revenue Recognition and Accounts Receivable Revenue from Contract with Customer [Text Block] Issuance of common stock Stock Issued During Period, Value, New Issues Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Foreign exchange derivative liabilities Foreign Currency Contracts, Liability, Fair Value Disclosure Prepaid expenses Prepaid Expense, Current Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Financial Instruments and Risk Management Financial Instruments Disclosure [Text Block] Construction in progress Construction in Progress [Member] Payments for product rights and other, net Payment for (Proceeds from) Other Investing Activity Inventories Increase (Decrease) in Inventories Segment Reporting [Table] Segment Reporting [Table] Estimated employer contributions in current year Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Net unrealized (loss) gain on available-for-sale fixed income securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Minimum Repayments on Outstanding Borrowings Schedule of Maturities of Long-Term Debt [Table Text Block] Contingent consideration Balance at beginning of period Balance at end of period Business Combination, Contingent Consideration, Liability, Current Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Foreign Tax Authority Income Tax Jurisdiction, Foreign [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Loss from operations Operating Income (Loss) Zoloft ® Zoloft ® [Member] Zoloft ® 2040 Senior Notes 2040 Senior Notes [Member] 2040 Senior Notes Current Fiscal Year End Date Current Fiscal Year End Date Accretion Accretion Expense, Noncurrent Accretion Expense, Noncurrent Loss on disposal of business (Gain) Loss on disposition of business Gain (Loss) on Disposition of Business YEN Term Loan YEN Term Loan [Member] YEN Term Loan Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Restructuring and related cost, expected cost Restructuring and Related Cost, Expected Cost Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Chargebacks Chargebacks Chargebacks Cash dividends declared, $0.12 per common share Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost Defined Benefit Plan, Service Cost Change in short-term borrowings, net Proceeds from (Repayments of) Short-Term Debt Equity Securities Equity Securities [Member] Corporate Bond Securities [Member] Corporate Bond Securities [Member] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Stock Awards Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common Stock, Shares, Issued Common Stock, Shares, Issued Measure: Measure [Axis] Treasury stock, shares Treasury Stock, Common, Shares Treasury Stock, Common, Shares Fair value of financial instruments Derivative Liability, Subject to Master Netting Arrangement, before Offset, Current Derivative Liability, Subject to Master Netting Arrangement, before Offset, Current Comprehensive Earnings (Loss) Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Currency Swap December 2028 Currency Swap December 2028 [Member] Currency Swap December 2028 Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Accrued restructuring Restructuring Reserve, Current Entity Interactive Data Current Entity Interactive Data Current Deferred income tax liability Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Fair value loss Business Combination, Contingent Consideration, Liability, Fair Value Gain (Loss), Noncurrent Business Combination, Contingent Consideration, Liability, Fair Value Gain (Loss), Noncurrent Termination Date Trading Arrangement Termination Date Fair value loss Business Combination, Contingent Consideration, Liability, Fair Value Gain (Loss) Business Combination, Contingent Consideration, Liability, Fair Value Gain (Loss) Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Deferred charge for taxes on intercompany profit Deferred Charges, Tax On Intercompany Profit Deferred Charges, Tax On Intercompany Profit Accounts payable Increase (Decrease) in Accounts Payable, Trade Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accrued restructuring Restructuring Reserve, Noncurrent Divestitures Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Issuance of restricted stock and stock options exercised, net Restricted Stock, Value, Shares Issued Net of Tax Withholdings MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other long-term assets Other long-term assets Other long-term assets Other current liabilities Other current liabilities Other Liabilities, Current Tax related items, including contingencies Liability for Uncertainty in Income Taxes, Noncurrent Stock option award expiration period, in years Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Other assets Other assets Other Assets, Noncurrent Litigation settlements and other contingencies, net Change in noncash litigation settlements, net Change in noncash litigation settlements, net Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Ministry of Finance, India Ministry of Finance, India [Member] Reclassifications Business Combination, Contingent Consideration Arrangements, Reclassifications, Noncurrent Business Combination, Contingent Consideration Arrangements, Reclassifications, Noncurrent Proceeds from derivative instrument, investing activities Proceeds from Derivative Instrument, Investing Activities Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Schedule of Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Sales Revenue, Gross to net adjustments Sales Revenue, Gross to net adjustments Sales Revenue, Gross to net adjustments Sales Revenue, Gross to net adjustments Purchases of IPR&D Proceeds From Refund Of In Process Research And Development Proceeds From Refund Of In Process Research And Development Net Investment Hedging Net Investment Hedging [Member] Other comprehensive (loss) earnings, before tax Net other comprehensive earnings (loss), before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Xanax ® Xanax ® [Member] Xanax ® Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Insurance settlements receivable Insurance Settlements Receivable Finite-lived intangible assets, original cost Intangible Asset, Finite-Lived, before Accumulated Amortization Other Noncurrent Liabilities Other Noncurrent Liabilities [Table Text Block] Total revenues Revenues Revenues Property, plant and equipment, gross Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Income Tax Contingency [Table] Income Tax Contingency [Table] Machinery and equipment Machinery and Equipment [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Receivable Type [Axis] Receivable Type [Axis] Income tax provision (benefit) Other Comprehensive Income (Loss), Tax Contingent consideration Contingent Consideration [Member] Contingent Consideration. Stock option award vesting period, in years Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Counterparty Name [Axis] Counterparty Name [Axis] Goodwill [Roll Forward] Goodwill [Roll Forward] Intrinsic value of stock-based awards exercised and restricted stock units converted Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercises In Period, Total Intrinsic Value And Equity Instruments Other Than Options, Vested In Period, Intrinsic Value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercises In Period, Total Intrinsic Value And Equity Instruments Other Than Options, Vested In Period, Intrinsic Value LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Payments to Acquire in Process Research and Development Payments to Acquire in Process Research and Development Other payables Accounts Payable, Other Variable Consideration Variable Consideration [Member] Variable Consideration [Member] Financial Assets and Liabilities Carried at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] 2030 Senior Notes 2030 Senior Notes [Member] 2030 Senior Notes Inventories Inventories Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Clomipramine Bellwether Clomipramine Bellwether [Member] Clomipramine Bellwether Level 3 Fair Value, Inputs, Level 3 [Member] Prepaid Expense and Other Assets [Abstract] Prepaid Expense and Other Assets [Abstract] Business Combination, Contingent Consideration Business Combination, Contingent Consideration [Table Text Block] 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Common stock repurchase Treasury Stock, Shares, Acquired 2027 Euro Senior Notes 2027 Euro Senior Notes [Member] 2027 Euro Senior Notes PEO Name PEO Name Gains and Losses on Derivatives in Cash Flow Hedging Relationships Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Schedule of Short-term Debt [Table] Short-Term Debt [Table] Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Measurement input Business Combination, Contingent Consideration, Liability, Measurement Input Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Liability Class [Axis] Liability Class [Axis] Common stock repurchase Treasury Stock, Value, Acquired, Cost Method Cash payment Payments for Restructuring Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash, cash equivalents and restricted cash — beginning of period Cash, cash equivalents and restricted cash — end of period Cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Restricted cash Restricted Cash and Cash Equivalent, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] General Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Cash to acquire business Payments to Acquire Businesses, Gross Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Amitiza ® Amitiza ® [Member] Amitiza ® 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Emerging Markets Segment Emerging Markets Segment [Member] Emerging Markets Segment Greater China Greater China Segment [Member] Greater China Segment Receivables Facility Receivables Facility [Member] Receivables facility. Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Disposal Group Name [Axis] Disposal Group Name [Axis] Summary of Long-Term Debt Schedule of Debt [Table Text Block] Investment, Name [Domain] Investment, Name [Domain] Medicaid and other governmental rebates Medicaid and other governmental rebates Medicaid and other governmental rebates Inventories Schedule of Inventory, Current [Table Text Block] 2026 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic (in USD per share) Basic earnings (loss) per share attributable to Viatris Inc. shareholders Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Purchase of common stock Payments for Repurchase of Common Stock Payments for Repurchase of Common Stock Agency mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Total current assets Assets, Current Range [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Long-term debt Long-Term Debt, Excluding Current Maturities Development and sales milestone payments Development and sales milestone payments Development and sales milestone payments Net unrecognized gain (loss) on derivatives in cash flow hedging relationships Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Retained deficit Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Equity Securities, FV-NI Equity Securities, FV-NI Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Short-term Debt [Line Items] Short-Term Debt [Line Items] Common Stock Marketable securities Common Stock [Member] Available-for-sale securities Debt Securities, Available-for-Sale Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Contingent consideration Balance at beginning of period Balance at end of period Business Combination, Contingent Consideration, Liability Employee Related Costs Employee Severance [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Cumulative payments for repurchase of common stock Payments For Repurchase Of Common Stock, Cumulative Payments For Repurchase Of Common Stock, Cumulative Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations [Member] Intangible Assets by Major Class [Line Items] Intangible Assets by Major Class [Line Items] Intangible Assets by Major Class Derivative Contract Type [Domain] Derivative Contract [Domain] Lipitor Lipitor ® [Member] Lipitor ® Opiod Civil Litigation Opiod Civil Litigation [Member] Opiod Civil Litigation Equity Awards Adjustments Equity Awards Adjustments [Member] Licensing and Other Partner Agreements Collaborative Arrangement Disclosure [Text Block] Hedging Relationship [Domain] Hedging Relationship [Domain] Overfunded status of plan Defined Benefit Plan, Funded (Unfunded) Status of Plan Total liabilities and equity Liabilities and Equity Reserve for Uncertain Tax Positions, Including Interest And Penalties Reserve for Uncertain Tax Positions, Including Interest And Penalties Reserve for Uncertain Tax Positions, Including Interest And Penalties Current portion of long-term debt Debt, Current Stock awards Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Charges Restructuring Charges Plan Name [Axis] Plan Name [Axis] Other Litigation Other [Member] Schedule of Accounts Receivable, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Income Tax Authority [Domain] Income Tax Jurisdiction [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Brands Brands [Member] Brands Other expense, net TSA income related to divestitures Other Nonoperating Income (Expense) Other Other Debt Obligations [Member] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Accounts payable Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Dymista ® Dymista ® [Member] Dymista ® Name Awards Close in Time to MNPI Disclosures, Individual Name Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Accounts Payable, Current [Abstract] Accounts Payable, Current [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Number of restricted stock awards, forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Defined benefit plans, estimated benefit payments, in current fiscal year Defined benefit plans, estimated benefit payments, in current fiscal year Defined benefit plans, estimated benefit payments, in current fiscal year Amended Multi District Litigation Amended Multi District Litigation [Member] Amended Multi District Litigation Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Trade receivables, net Receivables, Net, Current Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Payments Business Combination Contingent Consideration Liability Payments Business Combination Contingent Consideration Liability Payments Hedging Designation [Domain] Hedging Designation [Domain] Amended Anticompetitive Conduct with Generic Drugs Amended Anticompetitive Conduct with Generic Drugs [Member] Amended Anticompetitive Conduct with Generic Drugs [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Fair value loss Business Combination, Contingent Consideration, Liability, Fair Value Gain (Loss), Current Business Combination, Contingent Consideration, Liability, Fair Value Gain (Loss), Current Foreign exchange forward contracts Foreign Exchange Forward [Member] Hedging Designation [Axis] Hedging Designation [Axis] Restructuring and Other Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets at recurring fair value measurement Assets, Fair Value Disclosure Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Discontinued Operations and Disposal Groups [Abstract] Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Pay vs Performance Disclosure [Line Items] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Other non-cash items Other Noncash Income (Expense) Product Liability Product Liability [Member] Product Liability Debt Instrument [Line Items] Debt Instrument [Line Items] Proceeds from the sale of investments Proceeds from Sale of Equity Securities, FV-NI Issuance of restricted stock, net of shares withheld (in shares) Stock Issued During Period, Value, Stock Options Exercised, Net of Shares Tendered for Payment Stock Issued During Period, Value, Stock Options Exercised, Net of Shares Tendered for Payment Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Corporate Segment and Other Operating Segment Corporate Segment and Other Operating Segment [Member] Consideration transferred Business Combination, Consideration Transferred Schedule of Intangible Assets by Major Class [Table] Schedule of Intangible Assets by Major Class [Table] Schedule of Intangible Assets by Major Class [Table] Net unrecognized gain (loss) on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Retirement Plan Type [Domain] Retirement Plan Type [Domain] Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filler Category Entity Filer Category Impairment of goodwill Impairment of goodwill Goodwill, Impairment Loss Effexor ® Effexor ® [Member] Effexor ® Other revenues Revenue Not from Contract with Customer Name Trading Arrangement, Individual Name Other Liabilities, Fair Value Disclosure Other Liabilities, Fair Value Disclosure Cash and cash equivalents Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Norvasc Norvasc ® [Member] Norvasc ® Company Selected Measure Amount Company Selected Measure Amount Not Designated as Hedging Instruments Not Designated as Hedging Instrument [Member] Unrealized loss Equity Securities, FV-NI, Unrealized Gain (Loss) Income tax receivable Income Taxes Receivable Depreciation and amortization Depreciation, Depletion and Amortization Long-Term Incentive Plan 2003 Long Term Incentive Plan 2003 [Member] Long-Term Incentive 2003 Plan. Gross sales Revenue from Contract with Customer, Gross Revenue from Contract with Customer, Gross Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] 2030 Long-Term Debt, Maturity, Year Five Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Weighted average grant-date fair value per share, released Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax benefit Income tax expense Income Tax Expense (Benefit) Adjustments to reconcile net loss to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Idorsia Pharmaceuticals Ltd. Idorsia Pharmaceuticals Ltd. [Member] Idorsia Pharmaceuticals Ltd. Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Product and Service, Other Product and Service, Other [Member] Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Accretion Accretion Expense Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Unamortized debt issuance expense Unamortized Debt Issuance Expense Balance Sheet Location [Axis] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Exchange traded funds Exchange Traded Funds [Member] Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Derivative, term of contract Derivative, Contract Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Fair value of financial instruments Derivative Asset, Subject to Master Netting Arrangement, before Offset Mapi Pharma Ltd. Mapi Pharma Ltd. [Member] Mapi Pharma Ltd. Maximum damages sought Loss Contingency, Damages Sought, Value Other One-Time Nonoperating Expense Other One-Time Nonoperating Expense Other One-Time Nonoperating Expense Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] 2048 Senior Notes [Member] 2048 Senior Notes [Member] 2048 Senior Notes [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]