Corporate Information And Statement Of Ifrs Compliance [Abstract]

Rockwool - Filing #1442663

Concept	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2019-12-31
Corporate information and statement of IFRS compliance [abstract]
Name of reporting entity or other means of identification	—	ROCKWOOL International A/S	—
Domicile of entity	—	Denmark	—
Legal form of entity	—	Aktieselskab	—
Country of incorporation	—	Denmark	—
Address of entity's registered office	—	Hovedgaden 584, 2640 Hedehusene	—
Principal place of business	—	Global	—
Description of nature of entity's operations and principal activities	—	The purpose of the company is domestically and globally, amongst others by investing in other companies, to run industry, trade and service related activities as well as companies related to this, and to run investment activities.	—
Name of parent entity	—	N/A	—
Name of ultimate parent of group	—	ROCKWOOL International A/S	—
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [text block]	—	—	—
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [abstract]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Current inventories	216,000,000 EUR	—	236,000,000 EUR
Current trade receivables	247,000,000 EUR	—	275,000,000 EUR
Current trade payables	184,000,000 EUR	—	196,000,000 EUR