Overview of Consolidation Scope -Additional Information (Details)	Dec. 31, 2025 subsidiary
Argenx BV
Disclosure of subsidiaries [line items]
Number of subsidiaries	16
argenx B.V.
Disclosure of subsidiaries [line items]
Number of subsidiaries	1

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

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