XML 232 R52.htm IDEA: XBRL DOCUMENT
v3.22.4

Capital Structure, Financial Risk and Related Items - Share Capital (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 shares | Dec. 31, 2019 shares | Dec. 31, 2016 shares | Dec. 31, 2022 DKK (kr) Vote EquityInstruments kr / shares shares
Share Capital |  |  |  |
Par value (in euros per share) | kr / shares |  |  |  | kr 1
Number Of Shares Authorised | shares |  |  |  | 65,961,573
Number Of Votes | Vote |  |  |  | 1
Nominal value of shares repurchases | kr |  |  |  | kr 500,000
First authorization |  |  |  |
Share Capital |  |  |  |
Warrants issued |  |  |  | 68,291
Warrants reissued |  |  |  | 1,333
Warrants remain available for issue |  |  |  | 681,709
Warrants remain available for reissue |  |  |  | 1,254
Number of shares authorized for repurchase | shares | 500,000 |  |  |
Actual shares repurchased under authorization | shares | 40,000 |  |  |
Shares available for repurchase | shares | 460,000 |  |  |
Second authorization |  |  |  |
Share Capital |  |  |  |
Warrants issued |  |  |  | 500,000
Warrants reissued |  |  |  | 59,671
Warrants remain available for reissue |  |  |  | 10,661
Number of shares authorized for repurchase | shares |  | 500,000 |  |
Actual shares repurchased under authorization | shares |  | 500,000 |  |
Third authorization |  |  |  |
Share Capital |  |  |  |
Warrants issued |  |  |  | 500,000
Warrants reissued |  |  |  | 63,558
Number of shares authorized for repurchase | shares |  |  | 500,000 |
Actual shares repurchased under authorization | shares |  |  | 255,000 |

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | gmab_NumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | gmab_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of votes. + References No definition available. + Details
Name: | gmab_NumberOfVotes
Namespace Prefix: | gmab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants issued. + References No definition available. + Details
Name: | gmab_NumberOfWarrantsIssued
Namespace Prefix: | gmab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants reissued. + References No definition available. + Details
Name: | gmab_NumberOfWarrantsReissued
Namespace Prefix: | gmab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants remaining available for issue. + References No definition available. + Details
Name: | gmab_NumberOfWarrantsRemainingAvailableForIssue
Namespace Prefix: | gmab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants remaining available for reissue. + References No definition available. + Details
Name: | gmab_NumberOfWarrantsRemainingAvailableForReissue
Namespace Prefix: | gmab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. + References No definition available. + Details
Name: | gmab_ShareRepurchasedDuringPeriodShares
Namespace Prefix: | gmab_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares available for repurchase. + References No definition available. + Details
Name: | gmab_SharesAvailableForRepurchase
Namespace Prefix: | gmab_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal value of share repurchased. + References No definition available. + Details
Name: | gmab_SharesRepurchasedNominalValue
Namespace Prefix: | gmab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares authorised. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 79 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_79_a_i&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_NumberOfSharesAuthorised
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 79 -Subparagraph a -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_79_a_iii&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_ParValuePerShare
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_StatementScenarioAxis=gmab_StockRepurchaseFirstAuthorizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=gmab_StockRepurchaseSecondAuthorizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=gmab_StockRepurchaseThirdAuthorizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |