General (Policies)	9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting Policy	The accompanying unaudited condensed consolidated financial statements (“interim financial statements”) of Viatris Inc. and subsidiaries were prepared in accordance with U.S. GAAP and the rules and regulations of the SEC for reporting on Form 10-Q; therefore, as permitted under these rules, certain footnotes and other financial information included in audited financial statements were condensed or omitted. The interim financial statements contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the interim results of operations, comprehensive earnings, financial position, equity and cash flows for the periods presented.
Earnings per Share Policy	Basic earnings per share is computed by dividing net earnings by the weighted average number of shares outstanding during the period. Diluted earnings per share is computed by dividing net earnings by the weighted average number of shares outstanding during the period increased by the number of additional shares that would have been outstanding related to potentially dilutive securities or instruments, if the impact is dilutive
Fair Value of Financial Instruments Policy	Fair value is based on the price that would be received from the sale of an identical asset or paid to transfer an identical liability in an orderly transaction between market participants at the measurement date. In order to increase consistency and comparability in fair value measurements, a fair value hierarchy has been established that prioritizes observable and unobservable inputs used to measure fair value into three broad levels, which are described below: •Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for identical assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs. •Level 2: Observable market-based inputs other than quoted prices in active markets for identical assets or liabilities. •Level 3: Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as considers counterparty credit risk in its assessment of fair value.

General (Policies)

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying unaudited condensed consolidated financial statements (“interim financial statements”) of Viatris Inc. and subsidiaries were prepared in accordance with U.S. GAAP and the rules and regulations of the SEC for reporting on Form 10-Q; therefore, as permitted under these rules, certain footnotes and other financial information included in audited financial statements were condensed or omitted. The interim financial statements contain all adjustments (consisting of only normal recurring adjustments) necessary to present fairly the interim results of operations, comprehensive earnings, financial position, equity and cash flows for the periods presented.

Earnings per Share Policy

Basic earnings per share is computed by dividing net earnings by the weighted average number of shares outstanding during the period. Diluted earnings per share is computed by dividing net earnings by the weighted average number of shares outstanding during the period increased by the number of additional shares that would have been outstanding related to potentially dilutive securities or instruments, if the impact is dilutive

Fair Value of Financial Instruments Policy

Fair value is based on the price that would be received from the sale of an identical asset or paid to transfer an identical liability in an orderly transaction between market participants at the measurement date. In order to increase consistency and comparability in fair value measurements, a fair value hierarchy has been established that prioritizes observable and unobservable inputs used to measure fair value into three broad levels, which are described below:

•Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for identical assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.

•Level 2: Observable market-based inputs other than quoted prices in active markets for identical assets or liabilities.

•Level 3: Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.

In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as considers counterparty credit risk in its assessment of fair value.