Other assets (Details) - SEK (kr) kr in Millions	Dec. 31, 2025	Dec. 31, 2024
Other Assets1 [Abstract]
Claim against the State for CIRR-loans and concessionary loans	kr 448	kr 8
Cash receivables, funding operations	181	207
Other	125	71
Total	kr 754	kr 286

The amount of assets that the entity does not separately disclose in the same statement or note.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_OtherAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant