Statement Of Changes In Equity [Abstract]

Københavns Lufthavne - Filing #1417766

Concept	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	1,730,600,000 DKK	—	—	3,197,800,000 DKK	2,900,000 DKK	3,700,000 DKK	—	2,514,600,000 DKK	683,200,000 DKK	—	784,800,000 DKK	—	—	—	1,875,300,000 DKK	6,800,000 DKK	2,659,000,000 DKK	784,800,000 DKK	—	—	—	2,659,000,000 DKK	7,900,000 DKK	—	3,258,600,000 DKK	2,515,900,000 DKK	32,000,000 DKK	784,800,000 DKK	10,100,000 DKK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	9,600,000 DKK	—	- DKK	526,900,000 DKK	—	—	—	- DKK	—	—	- DKK	—	517,300,000 DKK	526,900,000 DKK	638,100,000 DKK	—	—	—	—	638,100,000 DKK	- DKK	- DKK	—	—	- DKK	—	—	—	—	—
Other comprehensive income	—	—	3,900,000 DKK	2,800,000 DKK	—	—	—	4,200,000 DKK	—	—	- DKK	—	2,800,000 DKK	3,100,000 DKK	38,500,000 DKK	—	—	—	—	2,500,000 DKK	38,800,000 DKK	- DKK	—	—	2,200,000 DKK	—	—	—	—	—
Comprehensive income	9,600,000 DKK	—	3,900,000 DKK	529,700,000 DKK	—	—	—	4,200,000 DKK	—	—	- DKK	—	520,100,000 DKK	530,000,000 DKK	599,600,000 DKK	—	—	—	—	640,600,000 DKK	38,800,000 DKK	- DKK	—	—	2,200,000 DKK	—	—	—	—	—