Analysis Of Income And Expense [Abstract]

Nel ASA - Filing #2617336

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Analysis of income and expense [abstract]
Material income and expense [abstract]
Revenue and other operating income	—	—	798 001 NOK	—	—	651 881 NOK	—	—
Operating expense	—	—	1 380 854 NOK	—	—	1 066 378 NOK	—	—
Expenses by nature [abstract]
Raw materials and consumables used	—	—	551 695 NOK	—	—	393 982 NOK	—	—
Classes of employee benefits expense [abstract]
Employee benefits expense	—	—	472 010 NOK	—	—	329 402 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	—	—	103 116 NOK	—	—	91 286 NOK	—	—
Impairment loss (reversal of impairment loss) recognised in profit or loss	—	—	4 500 NOK	—	—	71 666 NOK	—	—
Other expenses, by nature	—	—	249 533 NOK	—	—	180 042 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, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract]
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	—	—	7 108 NOK	—	—	18 151 NOK	—	—
Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract]
Share of profit (loss) of associates and joint ventures accounted for using equity method	—	—	35,000 NOK	—	—	1 242 NOK	—	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	6 330 NOK	7 108 NOK	1 680 290 NOK	1 666 852 NOK	1 261 880 NOK	1 292 261 NOK	18 151 NOK	12 230 NOK
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	1 680 290 NOK	—	—	1 292 261 NOK	—	—