Statement Of Changes In Equity [Abstract]

Sampo Oyj - Filing #2159939

Concept	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	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Purchase of treasury shares	— EUR	555,000,000 EUR	— EUR	555,000,000 EUR	— EUR	555,000,000 EUR	— EUR	— EUR	— EUR	— EUR	— EUR	1,444,000,000 EUR	1,444,000,000 EUR	— EUR	— EUR	— EUR	1,444,000,000 EUR	— EUR	— EUR	— EUR