Statement Of Changes In Equity [Abstract]

SEB - Filing #680322

Concept	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	2023-01-01 to 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	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	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	As at 2022-01-01	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	19 780 SEK	—	—	221 775 SEK	175,000,000 SEK	—	179 721 SEK	—	—	21 942 SEK	493,000,000 SEK	14,000,000 SEK	—	204 141 SEK	—	—	20 439 SEK	—	175,000,000 SEK	—	—	160 995 SEK	21 942 SEK	877,000,000 SEK	—	62,000,000 SEK	—	192 948 SEK	152 290 SEK	193 228 SEK	18,000,000 SEK	223,000,000 SEK	19 798 SEK	561,000,000 SEK	21 942 SEK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	38 116 SEK	—	—	—	—	—	38 116 SEK	—	—	—	—	—	—	—	26 877 SEK	—	26 877 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	1 092 SEK	659,000,000 SEK	—	—	0 SEK	—	—	385,000,000 SEK	—	—	—	49,000,000 SEK	—	—	2 208 SEK	—	—	—	81,000,000 SEK	48,000,000 SEK	—	—	—	641,000,000 SEK	—	1 438 SEK	—	—	—	—	—	—	—	—
Comprehensive income	—	37 024 SEK	659,000,000 SEK	—	—	0 SEK	—	38 116 SEK	385,000,000 SEK	—	—	—	49,000,000 SEK	—	—	29 085 SEK	—	26 877 SEK	—	81,000,000 SEK	48,000,000 SEK	—	—	—	641,000,000 SEK	—	1 438 SEK	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	14 195 SEK	—	—	—	—	—	14 195 SEK	—	—	—	—	—	—	—	12 884 SEK	—	12 884 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	21 942 SEK	192 948 SEK	—	152 011 SEK	—	18,000,000 SEK	223,000,000 SEK	—	—	—	19 798 SEK	—	561,000,000 SEK	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	845,000,000 SEK	—	—	—	—	—	845,000,000 SEK	—	—	—	—	—	—	—	2 965 SEK	—	2 965 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	146,000,000 SEK	—	—	—	—	—	146,000,000 SEK	—	—	—	—	—	—	—	167,000,000 SEK	—	167,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—