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Other Operating Income and Expenses - Schedule of Other Operating Income and Expenses (Detail) - SEK (kr)
kr in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Other operating income      
Gains on sales of intangible assets and PP&E kr 17 kr 85 kr 13
Gains on investments and sale of operations 136 701 1,199
Other operating income 841 445 314
Total other operating income 994 1,231 1,526
Other operating expenses      
Losses on sales of intangible assets and PP&E   (54) (3)
Losses on investments and sale of operations (421) (445) (238)
Impairment of goodwill (31,897) 0 (112)
Other operating expenses (541) (3,994) (811)
Total other operating expenses kr (32,859) kr (4,493) kr (1,164)