Capital structure and financial items - Derivative financial instruments - Narrative (Details) - Cash flow hedges kr in Millions	12 Months Ended
Dec. 31, 2024 DKK (kr)
Disclosure of detailed information about hedging instruments [line items]
Gains (losses) recognised in other comprehensive income including exchange differences, fair value measurement, related to acquisition of businesses	kr 1,154
Other intangible assets
Disclosure of detailed information about hedging instruments [line items]
Recognised in Other comprehensive income, asset	kr 5,763

The gains (losses) including exchange differences recognised in other comprehensive income on the fair value measurement of assets. [Refer: At fair value [member]; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2024-01-01
-Paragraph 93
-Subparagraph e
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_e_ii&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration