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stock, aggregate shares issued upon conversion (in shares) Convertible Preferred Stock, Aggregate Shares Issued Upon Conversion Convertible Preferred Stock, Aggregate Shares Issued Upon Conversion Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Operating Lease, expense Operating Lease, Expense Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Cash and Cash Equivalents, Restricted Cash and Investments Cash and Cash Equivalents Disclosure [Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Milestone Event [Domain] Milestone Event [Domain] Milestone Event [Domain] Current assets: Assets, Current [Abstract] Weighted-average remaining lease terms Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net decrease 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 Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net loss Net income (loss) Net loss Net Income (Loss) Attributable to Parent Debt Funding Period [Axis] Debt Funding Tranche [Axis] Debt Funding Tranche Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Total cash and cash equivalents and short-term investments Investments [Member] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Viatris Inc. Viatris Inc. [Member] Viatris Inc. Revenues: Revenues [Abstract] Accrued Liabilities [Abstract] Accrued Liabilities [Abstract] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]