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Financial Risk Management - Summary of Aging Analysis of Gross Values of Trade Receivables and Contracts Assets by Risk Category (Detail) - SEK (kr) kr in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | kr 52,799 | kr 60,748
Not due [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 45,164 | 53,050
Maturity within 3 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 3,772 | 4,314
Later than 3 months and not later than 6 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 858 | 699
2021 [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 558 | 532
Longer than 1 year [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 2,447 | 2,153
Country risk Low [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 30,767 | 34,701
Country risk Low [member] | Not due [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 27,431 | 32,015
Country risk Low [member] | Maturity within 3 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 2,434 | 2,090
Country risk Low [member] | Later than 3 months and not later than 6 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 445 | 165
Country risk Low [member] | 2021 [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 137 | 103
Country risk Low [member] | Longer than 1 year [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 320 | 328
Country risk medium [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 16,251 | 20,214
Country risk medium [member] | Not due [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 14,369 | 17,731
Country risk medium [member] | Maturity within 3 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 826 | 1,614
Country risk medium [member] | Later than 3 months and not later than 6 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 227 | 150
Country risk medium [member] | 2021 [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 224 | 134
Country risk medium [member] | Longer than 1 year [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 605 | 585
Country risk high [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 5,781 | 5,833
Country risk high [member] | Not due [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 3,364 | 3,304
Country risk high [member] | Maturity within 3 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 512 | 610
Country risk high [member] | Later than 3 months and not later than 6 months [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 186 | 384
Country risk high [member] | 2021 [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | 197 | 295
Country risk high [member] | Longer than 1 year [member] |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |
Aging analysis by risk category | kr 1,522 | kr 1,240

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