XML 228 R48.htm IDEA: XBRL DOCUMENT v3.22.4

Capital Structure, Financial Risk and Related Items - Warrant Program (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [line items]
Percentage of share capital attributed to exercise of warrants	1.00%	1.00%	2.00%
Government bonds maturity period	5 years
April 2012 - March 2017
Disclosure of terms and conditions of share-based payment arrangement [line items]
Warrant vesting period	4 years
Percentage of share capital attributed to exercise of warrants	25.00%
March 2017 - February 2021
Disclosure of terms and conditions of share-based payment arrangement [line items]
Warrant vesting period	3 years
Percentage of share capital attributed to exercise of warrants	100.00%

X

- Definition

The maturity period of debt instrument, government bonds.

+ References

No definition available.

+ Details

Name:	gmab_DebtInstrumentGovernmentBondsMaturityPeriod
Namespace Prefix:	gmab_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of share capital attributed by exercise of warrants which increase the share capital.

+ References

No definition available.

+ Details

Name:	gmab_PercentageOfShareCapitalAttributedToExerciseOfWarrants
Namespace Prefix:	gmab_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period which the right to exercise an warrant is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	gmab_WarrantVestingPeriod
Namespace Prefix:	gmab_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

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