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Contractual obligations and commitments (Details) € in Millions	1 Months Ended
	Feb. 28, 2019 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 EUR (€)
Commitments [Line Items]
Commitments to acquire property, plant and equipment		$ 0
Borrowings		11,000,000	€ 10
Efgartigimod
Commitments [Line Items]
Outstanding commitment		$ 330,000,000
Halozyme | Global Collaboration and License Agreement
Commitments [Line Items]
Outstanding commitment	$ 110,000,000
Payment for each future target	12,500,000
Future milestone payments	160,000,000
Payment for additional milestones	$ 40,000,000

X

- Definition

The amount of additional payment to be made for each target.

+ References

No definition available.

+ Details

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Namespace Prefix:	argx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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X

- Definition

The amount of future milestone payments too be made for all targets.

+ References

No definition available.

+ Details

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Namespace Prefix:	argx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of specified sales-based milestones subject to achievement of additional.

+ References

No definition available.

+ Details

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Namespace Prefix:	argx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of future capital expenditures that the entity is committed to make.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2023-01-01
-Paragraph 74
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_74_c&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
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- Details

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Namespace Prefix:
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- Details

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- Details

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