Statement Of Changes In Equity [Abstract]

Wärtsilä Oyj Abp - Filing #3399937

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	—	2,337,000,000 EUR	61,000,000 EUR	—	336,000,000 EUR	6,000,000 EUR	156,000,000 EUR	—	—	2,525,000,000 EUR	—	—	23,000,000 EUR	2,531,000,000 EUR	—	29,000,000 EUR	4,000,000 EUR	—	—	2,232,000,000 EUR	—	1,989,000,000 EUR	—	—	8,000,000 EUR	—	61,000,000 EUR	336,000,000 EUR	188,000,000 EUR	2,225,000,000 EUR	31,000,000 EUR	—	2,148,000,000 EUR	5,000,000 EUR	2,135,000,000 EUR	1,000,000 EUR	12,000,000 EUR	61,000,000 EUR	1,000,000 EUR	1,891,000,000 EUR	1,889,000,000 EUR	336,000,000 EUR	156,000,000 EUR	2,136,000,000 EUR	2,146,000,000 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	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—