Share-Based Compensation and Other Compensation Plans - One-time Cash Retention Awards (Details) - Performance Restricted Stock Units [Member]	1 Months Ended
Jul. 31, 2024 shares
Chief Executive Officer [Member]
Share-Based Compensation and Other Compensation Plans [Abstract]
Granted (in Shares)	5,725
President and Chief Investment Officer [Member]
Share-Based Compensation and Other Compensation Plans [Abstract]
Granted (in Shares)	80,550
President and Immunovant CEO [Member]
Share-Based Compensation and Other Compensation Plans [Abstract]
Granted (in Shares)	7,465

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details