Corporate Information And Statement Of Ifrs Compliance [Abstract]

REC Silicon - Filing #2616799

Concept	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31
Corporate information and statement of IFRS compliance [abstract]
Name of reporting entity or other means of identification	—	REC Silicon ASA	—
Domicile of entity	—	Norway	—
Legal form of entity	—	public limited liability company	—
Country of incorporation	—	Norway	—
Address of entity's registered office	—	Lysaker	—
Principal place of business	—	Lysaker, Norway	—
Description of nature of entity's operations and principal activities	—	producer of advanced silicon materials	—
Name of parent entity	—	REC Silicon ASA	—
Name of ultimate parent of group	—	REC	—
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	33,100,000 USD	—	41,300,000 USD