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Employee Information - Summary of Wages and Salaries and Social Security Expenses (Detail) - SEK (kr) kr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Information About Employees [line items] |  |  |
Of which pension costs | kr 4,963 | kr 5,170 | kr 4,882
Employee remuneration [member] |  |  |
Disclosure of Information About Employees [line items] |  |  |
Wages and salaries | 60,950 | 58,620 |
Social security expenses | 13,695 | 14,043 |
Of which pension costs | kr 4,963 | kr 5,170 |

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- Details
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