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Share-Based Instruments - Share repurchases (Details)
kr in Millions
 6 Months Ended
Jun. 30, 2022
DKK (kr)
item
shares
Jun. 30, 2021
DKK (kr)
shares
Dec. 31, 2021
Dec. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of authorization | item 2      
Treasury shares acquired 124,000 200,000    
Percentage of share capital repurchased     0.20% 0.30%
Acquisition of treasury shares | kr kr 270 kr 447    
RSU        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Treasury shares acquired 357,885      
2021 Authorization        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of shares authorized for repurchase 500,000      
Shares available for repurchase 500,000      
2019 Authorization        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of shares authorized for repurchase 500,000      
Actual shares repurchased under authorization 294,000      
Shares available for repurchase 206,000      
2016 Authorization        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of shares authorized for repurchase 500,000      
Actual shares repurchased under authorization 255,000