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Taxes - Components of Income Taxes Recognized in Income Statement (Detail) - SEK (kr)
kr in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Major components of tax expense (income) [abstract]      
Current income taxes for the year kr (4,289) kr (7,353) kr (6,110)
Current income taxes related to prior years 118 253 (337)
Deferred tax income/expense (+/–) 1,406 1,617 188
Share of taxes in joint ventures and associated companies (20) (14) (11)
Income tax expense kr (2,785) kr (5,497) kr (6,270)