Statement Of Comprehensive Income [Abstract]

argenx SE - Filing #1882803

Concept	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of comprehensive income [abstract]
Profit (loss)	709,594,000 USD	709,594,000 USD	—	709,594,000 USD	—	—	—	408,265,000 USD	408,265,000 USD	408,265,000 USD	608,455,000 USD	608,455,000 USD	—	608,455,000 USD
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]
Other comprehensive income, net of tax, gains (losses) from investments in equity instruments	—	18,267,000 USD	—	—	—	—	—	—	39,290,000 USD	—	—	– USD	—	—
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Gains (losses) on exchange differences on translation of foreign operations, net of tax	—	2,404,000 USD	—	—	—	—	—	—	3,048,000 USD	—	—	– USD	—	—
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	—	– USD	—	—	—	—	—	—	– USD	—	—	162,273,000 USD	—	—
Other comprehensive income	20,671,000 USD	20,671,000 USD	18,267,000 USD	—	2,404,000 USD	39,290,000 USD	3,048,000 USD	42,338,000 USD	42,338,000 USD	—	—	162,273,000 USD	162,273,000 USD	162,273,000 USD
Comprehensive income	730,266,000 USD	730,266,000 USD	18,267,000 USD	709,594,000 USD	2,404,000 USD	39,290,000 USD	3,048,000 USD	450,603,000 USD	450,603,000 USD	408,265,000 USD	608,455,000 USD	446,182,000 USD	162,273,000 USD	446,182,000 USD
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	730,266,000 USD	—	—	—	—	—	—	450,603,000 USD	—	—	446,182,000 USD	—	—