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Financial Risk Management - Summary of Sensitivity to Interest Rate Increase of One Basis Point (Detail) kr in Millions | 12 Months Ended
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Dec. 31, 2020 SEK (kr)
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | kr 2
Less than three months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Maturity between 3 and 12 months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Maturity between 1 and 3 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | (2)
Maturity between 3 and 5 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 2
2026 and later [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 2
Interest Bearing Assets [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | (6)
Interest Bearing Assets [member] | Less than three months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Interest Bearing Assets [member] | Maturity between 3 and 12 months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Interest Bearing Assets [member] | Maturity between 1 and 3 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | (4)
Interest Bearing Assets [member] | Maturity between 3 and 5 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | (2)
Interest Bearing Assets [member] | 2026 and later [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Interest bearing liabilities [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 7
Interest bearing liabilities [member] | Less than three months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Interest bearing liabilities [member] | Maturity between 3 and 12 months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Interest bearing liabilities [member] | Maturity between 1 and 3 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 2
Interest bearing liabilities [member] | Maturity between 3 and 5 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 4
Interest bearing liabilities [member] | 2026 and later [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 1
Derivatives [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 1
Derivatives [member] | Less than three months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Derivatives [member] | Maturity between 3 and 12 months [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Derivatives [member] | Maturity between 1 and 3 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Derivatives [member] | Maturity between 3 and 5 years [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | 0
Derivatives [member] | 2026 and later [member] |
Disclosure Of Financial Risk Management [Line Items] |
Sensitivity to interest rate increase of 1 basis point | kr 1

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