Capital structure and financial items - Derivative financial instruments - Derivative financial instruments (Details) kr in Millions	12 Months Ended
Dec. 31, 2024 DKK (kr) kr / $	Dec. 31, 2023 DKK (kr) kr / $
Disclosure of detailed information about hedging instruments [line items]
Notional amount	kr 248,006	kr 218,658
Hedging instrument, assets	6,326	2,344
Hedging instrument, liabilities	7,531	1,272
Derivative financial instruments
Disclosure of detailed information about hedging instruments [line items]
Recognised in the Income statement, liability	1,646	989
Recognised in Other comprehensive income, liability	5,885	283
Derivative financial instruments
Disclosure of detailed information about hedging instruments [line items]
Recognised in the Income statement, asset	6,204	449
Recognised in Other comprehensive income, asset	122	1,895
Cash flow hedges \| Forward contracts
Disclosure of detailed information about hedging instruments [line items]
Notional amount	154,691	124,268
Hedging instrument, assets	122	1,895
Hedging instrument, liabilities	kr 5,885	kr 283
Cash flow hedges \| Forward contracts \| USD
Disclosure of detailed information about hedging instruments [line items]
Average rate \| kr / $	676	676
Notional amount	kr 137,781	kr 104,022
Hedging instrument, assets	13	1,600
Hedging instrument, liabilities	5,704	193
Cash flow hedges \| Forward contracts \| CNH, CAD and JPY
Disclosure of detailed information about hedging instruments [line items]
Notional amount	16,910	20,246
Hedging instrument, assets	109	295
Hedging instrument, liabilities	181	90
Fair value hedges \| Forward contracts
Disclosure of detailed information about hedging instruments [line items]
Notional amount	93,315	94,390
Hedging instrument, assets	6,204	449
Hedging instrument, liabilities	kr 1,646	kr 989
Fair value hedges \| Forward contracts \| USD
Disclosure of detailed information about hedging instruments [line items]
Average rate \| kr / $	683	675
Notional amount	kr 75,864	kr 65,870
Hedging instrument, assets	6,135	330
Hedging instrument, liabilities	1,577	946
Fair value hedges \| Forward contracts \| EUR, CNH, CAD and others
Disclosure of detailed information about hedging instruments [line items]
Notional amount	17,451	28,520
Hedging instrument, assets	69	119
Hedging instrument, liabilities	kr 69	kr 43

The average price of a hedging instrument. [Refer: Hedging instruments [domain]]

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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]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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The gains (losses) including exchange differences recognised in other comprehensive income on the fair value measurement of liabilities. [Refer: At fair value [member]; Other comprehensive income]

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The gains (losses) including exchange differences recognised in profit or loss on the fair value measurement of assets. [Refer: At fair value [member]]

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The gains (losses) including exchange differences recognised in profit or loss on the fair value measurement of liabilities. [Refer: At fair value [member]]

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The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [domain]]

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The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [domain]]

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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