Statement Of Changes In Equity [Abstract]

Finnair Oyj - Filing #2161306

Concept	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	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	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 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	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	—	- EUR	—	—	5,770,000,000 EUR	- EUR	1,681,000,000 EUR	1 040,2 EUR	—	—	754,000,000 EUR	486,000,000 EUR	—	1 325,0 EUR	—	7,633,000,000 EUR	4,107,000,000 EUR	—	—	1,681,000,000 EUR	—	—	428,000,000 EUR	1 237,0 EUR	754,000,000 EUR	—	4,000,000,000 EUR	—	—	—	1,980,000,000 EUR	7,445,000,000 EUR	4,757,000,000 EUR	166,000,000 EUR	1,980,000,000 EUR	- EUR	7,620,000,000 EUR	1,681,000,000 EUR	754,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	- EUR	- EUR	—	2,543,000,000 EUR	- EUR	—	—	—	—	2,543,000,000 EUR	- EUR	—	—	- EUR	—	- EUR	—	—	- EUR	4,762,000,000 EUR	—	4,762,000,000 EUR	- EUR	—	—	—	- EUR	—	- EUR	- EUR	- EUR	—	—	—	—	—	—	—	—	—
Other comprehensive income	- EUR	- EUR	—	58,000,000 EUR	- EUR	—	—	—	—	- EUR	- EUR	—	—	- EUR	—	58,000,000 EUR	—	—	- EUR	262,000,000 EUR	—	- EUR	- EUR	—	—	—	262,000,000 EUR	—	- EUR	- EUR	- EUR	—	—	—	—	—	—	—	—	—
Comprehensive income	- EUR	- EUR	—	2,600,000,000 EUR	- EUR	—	—	—	—	2,543,000,000 EUR	- EUR	—	—	- EUR	—	58,000,000 EUR	—	—	- EUR	4,500,000,000 EUR	—	4,762,000,000 EUR	- EUR	—	—	—	262,000,000 EUR	—	- EUR	- EUR	- EUR	—	—	—	—	—	—	—	—	—
Issue of equity	- EUR	5,704,000,000 EUR	—	5,704,000,000 EUR	- EUR	—	—	—	—	- EUR	- EUR	—	—	- EUR	—	- EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	- EUR	7,000,000 EUR	—	7,000,000 EUR	- EUR	—	—	—	—	- EUR	- EUR	—	—	- EUR	—	- EUR	—	—	- EUR	14,000,000 EUR	—	- EUR	- EUR	—	—	—	- EUR	—	- EUR	- EUR	14,000,000 EUR	—	—	—	—	—	—	—	—	—