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Other Current Liabilities - Summary of Other Current Liabilities (Detail) - SEK (kr) kr in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of Other Current Liabilities [line items] |  |
Accrued interest | kr 177 | kr 181
Accrued expenses | 30,837 | 28,895
Derivative liabilities | 762 | 234
Total | 37,921 | 33,688
Of which employee-related [member] |  |
Disclosure of Other Current Liabilities [line items] |  |
Accrued expenses | 15,380 | 15,182
Of which supplier-related [member] |  |
Disclosure of Other Current Liabilities [line items] |  |
Accrued expenses | 9,100 | 7,823
Of which other [member] |  |
Disclosure of Other Current Liabilities [line items] |  |
Accrued expenses | 6,357 | 5,890
Other [member] |  |
Disclosure of Other Current Liabilities [line items] |  |
Other | kr 6,145 | kr 4,378

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