Statement Of Changes In Equity [Abstract]

K-Fast Holding - Filing #678643

Concept	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	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	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 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 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	—	5 100,4 SEK	3 257,6 SEK	—	—	545,000,000 SEK	—	—	638,000,000 SEK	350,000,000 SEK	—	1 689,4 SEK	5 169,6 SEK	—	—	—	193,000,000 SEK	3 690,3 SEK	574,000,000 SEK	297,000,000 SEK	1 372,9 SEK	—	2 801,1 SEK	1 372,9 SEK	4 233,7 SEK	0 SEK	23,000,000 SEK	574,000,000 SEK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	3,981,000,000 SEK	—	—	346,000,000 SEK	4,327,000,000 SEK	—	—	—	—	—	—	—	—	9,074,000,000 SEK	8,892,000,000 SEK	182,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	53,000,000 SEK	—	—	—	—	—	53,000,000 SEK	—	—	—	—	—	—	274,000,000 SEK	—	—	—	—	—	—	—	274,000,000 SEK	—	—	—	—	—	—
Comprehensive income	3,928,000,000 SEK	—	—	346,000,000 SEK	4,327,000,000 SEK	—	53,000,000 SEK	—	—	—	—	—	—	9,348,000,000 SEK	8,892,000,000 SEK	182,000,000 SEK	—	—	—	—	—	274,000,000 SEK	—	—	—	—	—	—
Issue of equity	3,230,000,000 SEK	—	—	—	—	—	—	64,000,000 SEK	—	—	3,166,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase through other contributions by owners, equity	5,000,000 SEK	—	—	5,000,000 SEK	0 SEK	—	—	—	—	—	—	—	—	11,000,000 SEK	—	11,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—