Statement Of Changes In Equity [Abstract]

Investor AB - Filing #679277

Concept	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	2023-01-01 to 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 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	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	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 2022-12-31	2022-01-01 to 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	As at 2021-12-31	As at 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	717  431 SEK	—	683 855 SEK	901,000,000 SEK	—	—	—	663,000,000 SEK	—	13  533 SEK	4  795 SEK	13 44 1 SEK	716 768 SEK	5,000,000 SEK	—	238,000,000 SEK	—	605  653 SEK	—	—	—	97 7 SEK	—	—	788,000,000 SEK	13  533 SEK	570  387 SEK	4  795 SEK	14 880 SEK	604 865 SEK	—	274,000,000 SEK	—	19,000,000 SEK	—	4  795 SEK	657  379 SEK	97 2 SEK	153,000,000 SEK	683  505 SEK	66,000,000 SEK	682  614 SEK	13  533 SEK	5 84 7 SEK	891,000,000 SEK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	126  817 SEK	—	127  045 SEK	—	—	22 7 SEK	127  045 SEK	—	—	—	—	—	—	—	—	—	—	—	—	74   7 6 2 SEK	74  681 SEK	81,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	74  681 SEK	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	1  544 SEK	—	1  540 SEK	—	—	5,000,000 SEK	16,000,000 SEK	67,000,000 SEK	—	1  439 SEK	—	—	—	—	—	36,000,000 SEK	—	14,000,000 SEK	—	9  550 SEK	25 4 SEK	43,000,000 SEK	—	85,000,000 SEK	13,000,000 SEK	—	—	—	—	—	—	121,000,000 SEK	—	9 506 SEK	—	9  033 SEK	—	—	—	—	—	—	—	—	—	—
Comprehensive income	125  273 SEK	—	125 5 05 SEK	—	—	232,000,000 SEK	127  061 SEK	67,000,000 SEK	—	1  439 SEK	—	—	—	—	—	36,000,000 SEK	—	14,000,000 SEK	—	65  212 SEK	7 4   42 7 SEK	37,000,000 SEK	—	85,000,000 SEK	13,000,000 SEK	—	—	—	—	—	—	121,000,000 SEK	—	65 175 SEK	—	9  033 SEK	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	13  4 78 SEK	—	13  4 78 SEK	—	—	—	13  4 78 SEK	—	—	—	—	—	—	—	—	—	—	—	—	12  254 SEK	12  254 SEK	—	—	—	—	—	—	—	—	—	—	—	—	12  254 SEK	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	107,000,000 SEK	—	– SEK	—	—	1 07 SEK	– SEK	—	—	—	—	—	—	—	—	—	—	—	—	282,000,000 SEK	216,000,000 SEK	66,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	216,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	64,000,000 SEK	—	64,000,000 SEK	—	—	—	64,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—	21,000,000 SEK	21,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—	21,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—