Statement Of Changes In Equity [Abstract]

Stora Enso Oyj - Filing #2206354

Concept	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	2019-01-01 to 2019-12-31	As at 2019-12-31	2019-01-01 to 2019-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31	As at 2018-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	5 518 EUR	1 195 EUR	23,000,000 EUR	16,000,000 EUR	77,000,000 EUR	12,000,000 EUR	8 809 EUR	1 342 EUR	—	—	—	633,000,000 EUR	—	—	— EUR	267,000,000 EUR	— EUR	—	8 793 EUR	—	—	—	277,000,000 EUR	—	— EUR	7 429 EUR	—	7,000,000 EUR	—	633,000,000 EUR	136,000,000 EUR	—	—	7 423 EUR	413,000,000 EUR	5 116 EUR	—	— EUR	20,000,000 EUR	77,000,000 EUR	4,000,000 EUR	—	— EUR	—	—	1 342 EUR	—	335,000,000 EUR	— EUR	6 714 EUR	— EUR	18,000,000 EUR	6 732 EUR	77,000,000 EUR	633,000,000 EUR	4,000,000 EUR	304,000,000 EUR	11,000,000 EUR	7,000,000 EUR	1 342 EUR	4 706 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	617,000,000 EUR	—	—	—	—	—	—	—	—	—	—	626,000,000 EUR	—	—	—	—	—	—	—	—	—	9,000,000 EUR	626,000,000 EUR	—	—	—	—	—	—	880,000,000 EUR	—	—	880,000,000 EUR	24,000,000 EUR	—	—	—	856,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	1 616 EUR	—	—	—	—	—	—	—	—	—	137,000,000 EUR	642,000,000 EUR	—	12,000,000 EUR	43,000,000 EUR	—	—	—	1 195 EUR	—	131,000,000 EUR	9,000,000 EUR	1 625 EUR	—	— EUR	—	—	198,000,000 EUR	—	1 113 EUR	—	—	808,000,000 EUR	24,000,000 EUR	—	—	—	1 089 EUR	—	—	—	—	109,000,000 EUR	—	11,000,000 EUR	13,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	237,000,000 EUR	—	—	—	—	—	—	—	—	—	—	237,000,000 EUR	—	—	—	—	—	—	—	—	—	—	237,000,000 EUR	—	—	—	—	—	—	394,000,000 EUR	—	—	394,000,000 EUR	1,000,000 EUR	—	—	—	395,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	6,000,000 EUR	—	—	—	—	—	—	—	—	6,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	6,000,000 EUR	—	—	—	—	—	—	4,000,000 EUR	—	—	—	—	—	—	—	4,000,000 EUR	—	—	—	—	—	—	—	—	—	4,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	3,000,000 EUR	—	—	—	—	—	—	—	—	6,000,000 EUR	—	8,000,000 EUR	—	—	—	—	—	—	—	—	—	—	3,000,000 EUR	—	—	—	—	—	—	—	—	—	3,000,000 EUR	—	—	—	—	— EUR	—	—	—	—	—	—	—	—	—	4,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—