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Information Regarding Members of the Board of Directors and Group Management - Summary of Remuneration to Members of the Board of Directors (Parenthetical) (Detail) - SEK (kr) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Information About Board Management And Employees [Abstract] |  |  |  |  |
Share price used to calculate value of synthetic shares | kr 97.64 |  |  |  |
Dividend compensation per share included in value of synthetic shares |  | kr 1.50 | kr 1.00 | kr 1.00 | kr 1.00
Social security charges | kr 3,740,020 |  |  |  |

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- Definition Disclosure of information about board management and employees. + References No definition available. + Details
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- Definition The amount, per share, of dividends proposed as distributions to owners. + References No definition available. + Details
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- Definition Share price used to calculate value of synthetic shares. + References No definition available. + Details
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- Definition Social security charges. + References No definition available. + Details
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