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Summary of Significant Accounting Policies - Significant Observable Inputs of Deferred Business Acquisition Liabilities (Details) - Motus - USD ($) $ / shares in Units, $ in Millions	Jun. 30, 2022	Aug. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Share price used to calculate issuable shares (in dollars per share)		$ 27.11
Insmed share price as of June 30, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Share price used to calculate issuable shares (in dollars per share)	$ 19.72
Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Deferred consideration	$ 10.8

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Business Combination, Deferred Liability

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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