Statement Of Cash Flows [Abstract]

Fortum Oyj - Filing #2161649

Concept	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2021-12-31
Statement of cash flows [abstract]
Cash flows from (used in) operating activities [abstract]
Dividends received, classified as operating activities	16,000,000 EUR	—	—	—	14,000,000 EUR	—
Interest paid, classified as operating activities	228,000,000 EUR	—	—	—	213,000,000 EUR	—
Interest received, classified as operating activities	153,000,000 EUR	—	—	—	99,000,000 EUR	—
Income taxes paid (refund), classified as operating activities	454,000,000 EUR	—	—	—	164,000,000 EUR	—
Cash flows from (used in) operating activities	1,819,000,000 EUR	—	—	—	8,767,000,000 EUR	—
Cash flows from (used in) investing activities [abstract]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities	—	—	—	498,000,000 EUR	—	—
Proceeds from sales of property, plant and equipment, classified as investing activities	12,000,000 EUR	—	—	—	3,000,000 EUR	—
Cash flows from (used in) investing activities	1,095,000,000 EUR	—	—	—	970,000,000 EUR	—
Cash flows from (used in) financing activities [abstract]
Other inflows (outflows) of cash, classified as financing activities	19,000,000 EUR	—	—	—	168,000,000 EUR	—
Cash flows from (used in) financing activities	2,614,000,000 EUR	—	—	—	6,055,000,000 EUR	—
Increase (decrease) in cash and cash equivalents before effect of exchange rate changes	301,000,000 EUR	—	—	—	3,682,000,000 EUR	—
Effect of exchange rate changes on cash and cash equivalents [abstract]
Effect of exchange rate changes on cash and cash equivalents	36,000,000 EUR	—	—	—	7,000,000 EUR	—
Cash and cash equivalents	—	4,183,000,000 EUR	3,919,000,000 EUR	—	—	7,592,000,000 EUR