Analysis Of Income And Expense [Abstract]

Elkem - Filing #5626181

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	—	—	—	—	—	17 810 NOK	—	—	—	—	21 134 NOK	—	—	—	—	—	—	—	—	—
Material income and expense [abstract]
Miscellaneous other operating income	—	—	—	—	—	1 066 NOK	—	—	—	—	331,000,000 NOK	—	—	—	—	—	—	—	—	—
Miscellaneous other operating expense	—	—	—	—	—	4 283 NOK	—	—	—	—	4 173 NOK	—	—	—	—	—	—	—	—	—
Revenue and other operating income	—	—	—	—	—	18 870 NOK	—	—	—	—	21 510 NOK	—	—	—	—	—	—	—	—	—
Expenses by nature [abstract]
Raw materials and consumables used	—	—	—	—	—	8 313 NOK	—	—	—	—	10 825 NOK	—	—	—	—	—	—	—	—	—
Classes of employee benefits expense [abstract]
Employee benefits expense	—	—	—	—	—	2 766 NOK	—	—	—	—	2 662 NOK	—	—	—	—	—	—	—	—	—
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Depreciation and amortisation expense [abstract]
Depreciation and amortisation expense	—	—	—	—	—	931,000,000 NOK	—	—	—	—	844,000,000 NOK	—	—	—	—	—	—	—	—	—
Impairment loss (reversal of impairment loss) recognised in profit or loss	—	—	—	—	—	168,000,000 NOK	—	—	—	—	25,000,000 NOK	—	—	—	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [abstract]
Disclosure of attribution of expenses by nature to their function [line items]
Miscellaneous other comprehensive income [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract]
Other comprehensive income, before tax, hedges of net investments in foreign operations	—	—	—	—	—	128,000,000 NOK	—	—	—	—	199,000,000 NOK	—	—	—	—	—	—	—	—	—
Income tax relating to exchange differences on translation of foreign operations and hedges of net investments in foreign operations included in other comprehensive income [abstract]
Income tax relating to hedges of net investments in foreign operations included in other comprehensive income	—	—	—	—	—	28,000,000 NOK	—	—	—	—	44,000,000 NOK	—	—	—	—	—	—	—	—	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax [abstract]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will not be reclassified to profit or loss, net of tax	—	—	—	—	—	0 NOK	—	—	—	—	0 NOK	—	—	—	—	—	—	—	—	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax	—	—	—	—	—	4,000,000 NOK	—	—	—	—	3,000,000 NOK	—	—	—	—	—	—	—	—	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	1 579 NOK	- NOK	1 044 NOK	1 579 NOK	98,000,000 NOK	1 677 NOK	33,000,000 NOK	- NOK	- NOK	501,000,000 NOK	396,000,000 NOK	498,000,000 NOK	102,000,000 NOK	498,000,000 NOK	317,000,000 NOK	- NOK	- NOK	62,000,000 NOK	- NOK	878,000,000 NOK
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	1 579 NOK	—	—	—	—	498,000,000 NOK	—	—	—	—	—	—	—	—	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	98,000,000 NOK	—	—	—	—	102,000,000 NOK	—	—	—	—	—	—	—	—	—