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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, 2021 | Dec. 31, 2020
Disclosure of financial assets [line items] |  |
Opening balance | kr 1,519 |
Opening balance | 21,613 |
Closing balance | 2,258 | kr 1,519
Closing balance | 30,626 | 21,613
Other investment in shares and participations [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 1,519 | 1,432
Additions | 184 | 123
Disposals/repayments/deductions | (229) | (43)
Change in value in funded pension plans | 0 | 0
Revaluation | 784 | 12
Reclassification | (1) | 0
Translation differences | 1 | (5)
Closing balance | 2,258 | 1,519
Interest bearing securities, non-current [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 21,613 | 20,354
Additions | 30,305 | 11,091
Disposals/repayments/deductions | (13,547) | (5,021)
Change in value in funded pension plans | 0 | 0
Revaluation | (75) | (72)
Reclassification | (7,670) | (4,739)
Translation differences | 0 | 0
Closing balance | 30,626 | 21,613
Other financial assets, non-current [member] | Financial assets, non-current [member] |  |
Disclosure of financial assets [line items] |  |
Opening balance | 4,842 | 5,614
Additions | 1,054 | 893
Disposals/repayments/deductions | (959) | (913)
Change in value in funded pension plans | 1,064 | 51
Revaluation | 99 | (53)
Reclassification | (1) | (271)
Translation differences | 118 | (479)
Closing balance | kr 6,217 | kr 4,842

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