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Leases - Summary of Components of Right of Use Assets (Detail) - SEK (kr) kr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Leases [Line Items] |  |
Opening balance | kr 7,870 |
Depreciation | (2,427) | kr (2,451)
Impairment losses | (154) | (66)
Closing balance | 6,320 | 7,870
Cost [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 17,196 | 14,857
Additions | 1,565 | 1,954
Balances regarding acquired/divested business | 2 | 334
Terminations | (1,359) | (897)
Translation differences | (332) | 948
Closing balance | 17,072 | 17,196
Accumulated depreciation and amortization [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (8,556) | (6,261)
Depreciation | (2,427) | (2,451)
Terminations | 919 | 552
Translation differences | 211 | (396)
Closing balance | (9,853) | (8,556)
Accumulated impairment losses [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (374) | (303)
Impairment losses | (154) | (66)
Terminations | 3 | 27
Translation differences | 11 | (32)
Closing balance | (514) | (374)
Financial sublease [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (396) | (345)
Derecognition for sublease | (2) | 0
Translation differences | 13 | (51)
Closing balance | (385) | (396)
Real estate [Member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 7,336 |
Closing balance | 5,985 | 7,336
Real estate [Member] | Cost [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 15,895 | 13,756
Additions | 1,307 | 1,650
Balances regarding acquired/divested business | 2 | 334
Terminations | (870) | (719)
Translation differences | (331) | 874
Closing balance | 16,003 | 15,895
Real estate [Member] | Accumulated depreciation and amortization [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (7,789) | (5,687)
Depreciation | (2,146) | (2,141)
Terminations | 546 | 393
Translation differences | 209 | (354)
Closing balance | (9,180) | (7,789)
Real estate [Member] | Accumulated impairment losses [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (374) | (303)
Impairment losses | (93) | (66)
Terminations | 3 | 27
Translation differences | 11 | (32)
Closing balance | (453) | (374)
Real estate [Member] | Financial sublease [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (396) | (345)
Derecognition for sublease | (2) | 0
Translation differences | 13 | (51)
Closing balance | (385) | (396)
Vehicles [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 369 |
Closing balance | 280 | 369
Vehicles [member] | Cost [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 998 | 930
Additions | 257 | 168
Balances regarding acquired/divested business | 0 |
Terminations | (489) | (178)
Translation differences | 3 | 78
Closing balance | 769 | 998
Vehicles [member] | Accumulated depreciation and amortization [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (629) | (495)
Depreciation | (232) | (250)
Terminations | 373 | 159
Translation differences | (1) | (43)
Closing balance | (489) | (629)
Vehicles [member] | Accumulated impairment losses [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 0 |
Impairment losses | 0 |
Terminations | 0 |
Translation differences | 0 |
Closing balance | 0 | 0
Vehicles [member] | Financial sublease [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 0 |
Derecognition for sublease | 0 | 0
Translation differences | 0 |
Closing balance | 0 | 0
Other [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 165 |
Closing balance | 55 | 165
Other [member] | Cost [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 303 | 171
Additions | 1 | 136
Balances regarding acquired/divested business | 0 |
Terminations | 0 |
Translation differences | (4) | (4)
Closing balance | 300 | 303
Other [member] | Accumulated depreciation and amortization [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | (138) | (79)
Depreciation | (49) | (60)
Terminations | 0 |
Translation differences | 3 | 1
Closing balance | (184) | (138)
Other [member] | Accumulated impairment losses [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 0 |
Impairment losses | (61) |
Terminations | 0 |
Translation differences | 0 |
Closing balance | (61) | 0
Other [member] | Financial sublease [member] |  |
Disclosure Of Leases [Line Items] |  |
Opening balance | 0 |
Derecognition for sublease | 0 | 0
Translation differences | 0 |
Closing balance | kr 0 | kr 0

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