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Financial Assets, Non-current - Summary of Financial Assets, Non-current (Detail) - SEK (kr) kr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of financial assets [line items] |  |
Opening balance | kr 2,074 |
Opening balance | 9,164 |
Translation differences | (124) | kr 34
Closing balance | 2,091 | 2,074
Closing balance | 9,931 | 9,164
Other investment in shares and participations [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 2,074 | 2,258
Additions | 206 | 218
Disposals/repayments/deductions | (2) | (205)
Amortization | 0 | 0
Change in value in funded pension plans | 0 | 0
Revaluation | (185) | (205)
Reclassification | 0 | 0
Translation differences | (2) | 8
Closing balance | 2,091 | 2,074
Interest bearing securities, non-current [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 9,164 | 30,626
Additions | 12,887 | 13,583
Disposals/repayments/deductions | (4,127) | (29,523)
Amortization | 0 | 0
Change in value in funded pension plans | 0 | 0
Revaluation | 269 | 262
Reclassification | (8,262) | (5,784)
Translation differences | 0 | 0
Closing balance | 9,931 | 9,164
Other financial assets, non-current [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 6,839 | 6,217
Additions | 1,899 | 1,249
Disposals/repayments/deductions | (816) | (481)
Amortization | (457) | (288)
Change in value in funded pension plans | (1,033) | 244
Revaluation | 0 | 85
Reclassification | (65) | (542)
Translation differences | (17) | 355
Closing balance | kr 6,350 | kr 6,839

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