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Operating Assets and Liabilities - Accounting policies and management estimates (Details) - DKK (kr) kr in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items] |  |  |
Research and development expenses | kr 4,181 | kr 3,137 | kr 2,386
Carrying amount of intangible asset | kr 254 | 338 |
Actual useful life of intangibles | 7 years |  |
Licenses, Rights and Patents |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Carrying amount of intangible asset | kr 254 | kr 338 |
Licenses, Rights and Patents | Bottom of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Estimated useful life of intangibles | 5 years |  |
Licenses, Rights and Patents | Top of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Estimated useful life of intangibles | 7 years |  |

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- Definition The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2021-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_118_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_c&doctype=Standard -URIDate 2021-03-24 + Details
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