Statement Of Comprehensive Income [Abstract]

Sampo Oyj - Filing #5454473

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31
Statement of comprehensive income [abstract]
Profit (loss)	— EUR	— EUR	1 154 EUR	— EUR	— EUR	1 154 EUR	50,000,000 EUR	1 203 EUR	— EUR	— EUR	— EUR	1 393 EUR	— EUR	1 323 EUR	70,000,000 EUR	1 323 EUR	— EUR	— EUR	— EUR	— EUR
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	—	—	—	—	—	0 EUR	—	—	—	—	—	—	—	—	—	5,000,000 EUR	—	—	—	—
Other comprehensive income that will not be reclassified to profit or loss, net of tax	—	—	—	—	—	—	—	0 EUR	—	—	—	5,000,000 EUR	—	—	—	—	—	—	—	—
Other comprehensive income that will be reclassified to profit or loss, net of tax	—	—	—	—	—	—	—	3,000,000 EUR	—	—	—	3,000,000 EUR	—	—	—	—	—	—	—	—
Other comprehensive income	— EUR	— EUR	3,000,000 EUR	— EUR	4,000,000 EUR	0 EUR	— EUR	3,000,000 EUR	— EUR	1,000,000 EUR	— EUR	8,000,000 EUR	— EUR	8,000,000 EUR	— EUR	5,000,000 EUR	— EUR	1,000,000 EUR	— EUR	1,000,000 EUR
Comprehensive income	— EUR	— EUR	1 151 EUR	— EUR	4,000,000 EUR	1 153 EUR	50,000,000 EUR	1 200 EUR	— EUR	1,000,000 EUR	— EUR	1 386 EUR	— EUR	1 316 EUR	70,000,000 EUR	1 318 EUR	— EUR	1,000,000 EUR	— EUR	1,000,000 EUR
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	—	—	1 151 EUR	—	—	—	1 316 EUR	—	—	—	—	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	—	—	50,000,000 EUR	—	—	—	70,000,000 EUR	—	—	—	—	—	—	—	—