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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
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