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Financial Risk Management - Disclosure of Customer Finance Fair Value Reconciliation (Detail) - SEK (kr)
kr in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Customer Finance Reconciliation [Abstract]    
Opening balance kr 5,370 kr 3,287
Additions 49,583 37,295
Disposals/repayments (47,409) (35,412)
Revaluation (467) (151)
Translation difference (160) 351
Closing balance 6,917 5,370
Of which non-current kr 1,347 kr 415