Name:	argx_ConversionOfStockSharesIssued
Namespace Prefix:	argx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of share options granted in share-based payment arrangement being used to pay tax by transferring the economic benefits

No definition available.

Name:	argx_NumberOfShareOptionsGrantedInShareBasedPaymentArrangementUsedToPayTax
Namespace Prefix:	argx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Percentage of vesting of share-based compensation awards.

No definition available.

Name:	argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	argx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

Vesting Requirements For Share-Based Payment Arrangement, Vesting Period

No definition available.

Name:	argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod
Namespace Prefix:	argx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_d&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The weighted average share price. [Refer: Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_c&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_WeightedAverageSharePrice2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=argx_NonExecutiveDirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=argx_StockOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	argx_VestingRightAxis=argx_ShareBasedCompensationAwardsTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: