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B4 Other operating income and expenses (Tables) | 12 Months Ended
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Dec. 31, 2020
Analysis Of Income And Expense [Abstract] |
Schedule of Other Operating Income and Expenses |
Other operating income and expenses |  |  |  |  |  |
|  | 2020 |  | 2019 |  | 2018
Other operating income |  |  |  |  |  |
Gains on sales of intangible assets and PP&E |  | 64 |  | 115 |  | 30
Gains on sales of investments and operations 1) |  | 347 |  | 1,119 |  | 105
Other operating income |  | 750 |  | 1,116 |  | 362
Total other operating income |  | 1,161 |  | 2,350 |  | 497
Other operating expenses |  |  |  |  |  |
Losses on sales of intangible assets and PP&E |  | — |  | — |  | (17)
Losses on sales of investments and operations 1) |  | (488) |  | (422) |  | (330)
Write-down of goodwill 2) |  | — |  | — |  | (275)
Other operating expenses 3) |  | (11) |  | (11,638) |  | (43)
Total other operating expenses |  | (499) |  | (12,060) |  | (665)
1) | Includes divestments presented in note E2 “Business combinations.”
2) | For more information about the write-down of goodwill, see note C1 “Intangible assets.”
3) | Includes cost of SEK -10.7 billion in 2019 related to the resolution of the US SEC and DOJ investigations.

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