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Information Regarding Members of the Board of Directors and Group Management - Summary of Remuneration Costs for the President and CEO and Other Members of Executive Team (ET) (Detail) - Board of directors [member] - SEK (kr) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Classes Of Employee Benefits Expense [line items] |  |
Salary | kr 115,790,992 | kr 102,641,439
Annual variable remuneration provision earned for the year | 37,992,529 | 28,289,319
Long-term variable compensation provision | 82,348,162 | 62,641,077
Pension costs | 48,799,296 | 41,674,125
Other beneﬁts | 17,834,365 | 22,366,555
Social charges and taxes | 74,088,845 | 61,052,148
Total | 376,854,189 | 318,664,663
The President and CEO [member] |  |
Classes Of Employee Benefits Expense [line items] |  |
Salary | 17,727,726 | 16,299,080
Long-term variable compensation provision | 41,110,656 | 31,491,325
Pension costs | 9,113,376 | 8,284,891
Other beneﬁts | 770,276 | 600,572
Social charges and taxes | 21,592,463 | 17,807,558
Total | 90,314,497 | 74,483,426
Other Members of Executive Team [member] |  |
Classes Of Employee Benefits Expense [line items] |  |
Salary | 98,063,266 | 86,342,359
Annual variable remuneration provision earned for the year | 37,992,529 | 28,289,319
Long-term variable compensation provision | 41,237,506 | 31,149,752
Pension costs | 39,685,920 | 33,389,234
Other beneﬁts | 17,064,089 | 21,765,983
Social charges and taxes | 52,496,382 | 43,244,590
Total | kr 286,539,692 | kr 244,181,237

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- Definition Cost for annual variable remuneration earned in year to be paid year after. + References No definition available. + Details
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- Definition The amount of remuneration paid or payable to the entity's directors. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of compensation to key management personnel in the form of other long-term employee benefits. [Refer: Other long-term employee benefits; Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_17_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of employee expenses that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_5&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_5&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition A class of employee benefits expense that represents social security contributions. [Refer: Employee benefits expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_9&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_9&doctype=Standard -URIDate 2020-01-01 + Details
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