Statement Of Changes In Equity [Abstract]

Wärtsilä Oyj Abp - Filing #3399998

Concept	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	2 337 EUR	61,000,000 EUR	—	336,000,000 EUR	6,000,000 EUR	156,000,000 EUR	—	—	2 525 EUR	—	—	23,000,000 EUR	2 531 EUR	—	29,000,000 EUR	4,000,000 EUR	—	—	2 232 EUR	—	1 989 EUR	—	—	8,000,000 EUR	—	61,000,000 EUR	336,000,000 EUR	188,000,000 EUR	2 225 EUR	31,000,000 EUR	—	2 148 EUR	5,000,000 EUR	2 135 EUR	1,000,000 EUR	12,000,000 EUR	61,000,000 EUR	1,000,000 EUR	1 891 EUR	1 889 EUR	336,000,000 EUR	156,000,000 EUR	2 136 EUR	2 146 EUR	1,000,000 EUR	9,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	503,000,000 EUR	—	—	—	—	—	—	503,000,000 EUR	4,000,000 EUR	—	507,000,000 EUR	—	—	—	—	—	—	269,000,000 EUR	—	—	258,000,000 EUR	—	12,000,000 EUR	258,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	29,000,000 EUR	—	—	32,000,000 EUR	—	—	—	18,000,000 EUR	—	—	29,000,000 EUR	54,000,000 EUR	—	—	25,000,000 EUR	—	—	17,000,000 EUR	1,000,000 EUR	—	10,000,000 EUR	—	7,000,000 EUR	—	—	33,000,000 EUR	—	—	—	—	—	22,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	474,000,000 EUR	—	—	32,000,000 EUR	—	—	—	521,000,000 EUR	3,000,000 EUR	—	478,000,000 EUR	54,000,000 EUR	—	—	25,000,000 EUR	—	—	252,000,000 EUR	1,000,000 EUR	—	247,000,000 EUR	—	4,000,000 EUR	258,000,000 EUR	—	33,000,000 EUR	—	—	—	—	—	22,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	188,000,000 EUR	—	—	—	—	—	—	188,000,000 EUR	6,000,000 EUR	—	194,000,000 EUR	—	—	—	—	—	—	156,000,000 EUR	—	—	153,000,000 EUR	—	3,000,000 EUR	153,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	—	—	—	18,000,000 EUR	—	—	—	—	—	—	18,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	15,000,000 EUR	—	—	—	—	—	—	15,000,000 EUR	—	—	15,000,000 EUR	—	—	—	—	—	—	4,000,000 EUR	—	—	4,000,000 EUR	—	—	4,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—