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Capital Structure, Financial Risk and Related Items - Fair Value Measurement (Details) - Net Book value - DKK (kr) kr in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Marketable Securities
Reconciliation of changes in fair value measurement, assets [abstract]
Financial assets	kr 10,381	kr 8,819
Marketable Securities | Level 1 of fair value hierarchy [member]
Reconciliation of changes in fair value measurement, assets [abstract]
Financial assets	10,381	8,819
Other
Reconciliation of changes in fair value measurement, assets [abstract]
Financial assets	371	1,081
Other | Level 1 of fair value hierarchy [member]
Reconciliation of changes in fair value measurement, assets [abstract]
Financial assets	344	1,067
Other | Level 3 of fair value hierarchy [member]
Reconciliation of changes in fair value measurement, assets [abstract]
Financial assets	kr 27	kr 14	kr 149

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- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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