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Operating Assets and Liabilities - Intangible Assets (Details) - DKK (kr)
kr in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Intangible Assets    
Cost at beginning of period kr 254  
Cost at end of period 146 kr 254
Licenses, Rights and Patents    
Intangible Assets    
Cost at beginning of period 254  
Cost at end of period 146 254
Licenses, Rights and Patents | Gross carrying amount [member]    
Intangible Assets    
Cost at beginning of period 891 891
Cost at end of period 891 891
Licenses, Rights and Patents | Accumulated amortization and impairment    
Intangible Assets    
Cost at beginning of period (637) (553)
Amortization for the year (70) (84)
Cost at end of period (745) kr (637)
Impairment for the year kr (38)