Analysis Of Income And Expense [Abstract]

Fortum Oyj - Filing #2176628

Concept	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	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	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
Analysis of income and expense [abstract]
Revenue [abstract]
Revenue	—	—	8 804 EUR	—	—	—	—	—	—	—	—	—	—	—	6 422 EUR	—
Material income and expense [abstract]
Income from continuing operations attributable to owners of parent	—	—	1 011 EUR	—	—	—	—	—	—	—	—	—	—	—	3 985 EUR	—
Income from discontinued operations attributable to owners of parent	—	—	3 428 EUR	—	—	—	—	—	—	—	—	—	—	—	3 246 EUR	—
Profit (loss) from continuing operations attributable to non-controlling interests	—	—	0 EUR	—	—	—	—	—	—	—	—	—	—	—	23,000,000 EUR	—
Profit (loss) from discontinued operations attributable to non-controlling interests	—	—	7 874 EUR	—	—	—	—	—	—	—	—	—	—	—	875,000,000 EUR	—
Finance income (cost)	—	—	193,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	161,000,000 EUR	—
Other finance income (cost)	—	—	101,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	32,000,000 EUR	—
Interest expense	—	—	179,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	154,000,000 EUR	—
Expenses by nature [abstract]
Classes of employee benefits expense [abstract]
Employee benefits expense	—	—	504,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	496,000,000 EUR	—
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Depreciation and amortisation expense [abstract]
Depreciation and amortisation expense	—	—	566,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	587,000,000 EUR	—
Impairment loss (reversal of impairment loss) recognised in profit or loss	—	—	905,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	35,000,000 EUR	—
Other expenses, by nature	—	—	615,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	582,000,000 EUR	—
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]
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	—	—	7,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	1,000,000 EUR	—
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	—	—	629,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	168,000,000 EUR	—
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax [abstract]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, before tax	—	—	41,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	8,000,000 EUR	—
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	1 044 EUR	3 337 EUR	10 757 EUR	2 208 EUR	7 420 EUR	39,000,000 EUR	264,000,000 EUR	139,000,000 EUR	695,000,000 EUR	739,000,000 EUR	209,000,000 EUR	980,000,000 EUR	180,000,000 EUR	185,000,000 EUR	510,000,000 EUR	37,000,000 EUR
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	3 337 EUR	—	—	—	—	—	—	—	—	—	—	—	185,000,000 EUR	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	—	7 420 EUR	—	—	—	—	—	—	—	—	—	—	—	695,000,000 EUR	—