CHF Switzerland, Francs Items to be reclassified to profit or loss Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] Fair value of financial assets Financial assets, at fair value Derivatives Derivatives [member] Liquidity inflows Liquidity Inflows Amount of liquidity inflows used in calculate liquidity coverage ratio, calculated in accordance with the Commission Delegated Regulation. Interest expenses Total interest expenses Interest expense Gains (+) and losses (-) through profit or loss Gains (losses) recognised in profit or loss excluding exchange differences, fair value measurement, liabilities Collateral provided Collateral Provided [Abstract] No definition available. Sensitivity correlations maximum negative relationship Sensitivity Correlations Significant Unobservable Inputs Maximum Negative Relationship The value of sensitivity analysis of correlation significant unobservable inputs maximum negative relationship. Schedule of net interest income Disclosure Of Net Interest Revenue [Table Text Block] The disclosure of net interest income. Loans to credit institutions Loans and advances to banks Levels of fair value hierarchy [domain] Levels of fair value hierarchy [domain] Total operating expenses Operating expense Assets and liabilities [domain] Assets and liabilities [domain] Common Equity Tier 1 (CET1) capital before regulatory adjustments Common Equity Tier One Capital Before Regulatory Adjustments Amount of Common Equity Tier 1 (CET1) capital before regulatory adjustments. Slovakia SLOVAKIA Net liquidity outflows Net Liquidity Outflows Amount of net liquidity outflows used in calculate liquidity coverage ratio, calculated in accordance with the Commission Delegated Regulation. Total equity Balance at the beginning of the period Balance at the end of the period Equity Correlation input Correlation Measurement Input [Member] This member stands for the correlation used as a measurement input. Loans and off balance Opening balance January 1 Closing balance Loans and Off-Balance The amount of loans and offbalance. Disclosure of detailed information about borrowings [table] Disclosure of detailed information about borrowings [table] Off-balance sheet Off-Balance Instruments [Member] This member represents off balance instruments Disclosure of detailed information about borrowings [abstract] Sensitivity, correlations maximum positive relationship Sensitivity Correlations Significant Unobservable Inputs Maximum Positive Relationship The value of sensitivity analysis of correlation significant unobservable inputs maximum positive relationship. Statement of comprehensive income [abstract] Summary of changes in equity Statement of changes in equity [line items] Other assets Other assets Items not to be reclassified to profit or loss Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] Level 1 Level 1 of fair value hierarchy [member] Total European Countries Excluding Sweden [Member] Region of European countries excluding Sweden. Interest rate-related contracts Debt Interest Rate Related Contracts [Member] This member represents debt interest rate related contracts. of which Capital conservation buffer Mandatory capital conservation buffer Institution Specific Common Equity Tier One Capital Ratio Capital Conservation Buffer Percentage of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, Capital Conservation Buffer as defined by regulatory framework. Serbia SERBIA Sensitivity, input depreciation, assets Percentage of reasonably possible decrease in unobservable input, assets Total liquidity reserve Liquidity Reserve The amount of liquidity reserve. Level 2 Level 2 of fair value hierarchy [member] Disclosure of non-adjusting events after reporting period [abstract] Dividend, paid Dividends paid, classified as financing activities Financial assets at fair value through profit or loss, category Financial assets at fair value through profit or loss, category [member] Statement of financial position [abstract] Total liquid assets Total Liquid Assets Amount of liquid assets used in calculate liquidity coverage ratio, calculated in accordance with the Commission Delegated Regulation. Cover [Abstract] Financial institutions Financial Institutions [Member] This member stands for Financial institutions. Interest income using effective interest method Interest revenue calculated using effective interest method Exchange rate differences Gains (Losses) Recognised In Profit Or Loss, Fair Value Measurement, Currency Exchange Rate Effects, Derivative, Net Assets (Liabilities) The increase (decrease) in assets (liabilities) due to gains (losses) recognised in profit or loss on the fair value measurement of exchange-rate effects on net assets and liabilities. Pillar 2 guidance Pillar Two Guidance For Leverage Ratio Pillar Two Guidance For Leverage Ratio Sensitivity, input appreciation, liabilities Reasonably Possible Increase In Unobservable Input, Liabilities Reasonably Possible Increase In Unobservable Input, Liabilities Interest-bearing securities excluding loans in the form of interest-bearing securities Interest Bearing Securities Excluding Loans In Form Of Interest Bearing Securities [Member] This member stands for interest-bearing securities excluding loans in the form of interest-bearing securities. Net fee and commission expense Fee and commission income (expense) Financial instruments under fair value hedge accounting Gain (loss) on hedge ineffectiveness recognised in profit or loss Transfers into Level 3 of fair value hierarchy, assets Transfers into Level 3 of fair value hierarchy, assets Financing activities Cash flows from (used in) financing activities [abstract] 2% 2% [Member] 2% Disclosure of significant unobservable inputs used in fair value measurement of assets [table] Disclosure of significant unobservable inputs used in fair value measurement of assets [table] Classes of liabilities [domain] Classes of liabilities [domain] Total risk-based capital requirement including Pillar 2 guidance Percentage of Risk Based Capital Requirements Percentage of total risk-based capital requirement. Business Indicator Component Business Indicator Component Business Indicator Component Pillar 2 capital requirements Percentage of Pillar Two Capital Requirements Percentage of pillar two capital requirements. Covered bonds issued by other institutions Covered Bonds Issued By Other Institutions [Member] Covered bonds issued by other institutions. Total comprehensive income Total comprehensive income Comprehensive income Schedule of fair value related to credit risk Disclosure of credit risk [text block] Statement of changes in equity [abstract] Retained earnings Retained earnings Interest-bearing securities and lending Loans And Interest Bearing Securities [Member] This member stands for loans and interest bearing securities. Schedule of capital adequacy Disclosure Of Capital Adequacy [Table Text Block] The disclosure of capital adequacy. Decreases due to derecognition Decrease through derecognition, financial assets Net stable funding ratio Net Stable Funding Ratio Net stable funding ratio calculated in accordance with the Commission Delegated Regulation. Available stable funding Amount of Available Stable Funding Amount of available stable funding. Disclosure of detailed information about financial instruments [line items] Disclosure of detailed information about financial instruments [line items] Document Fiscal Period Focus Document Fiscal Period Focus Capital Adequacy and Liquidity Situation [Abstract] No definition available. Common Equity Tier 1 capital ratio Common Equity Tier One Ratio Percentage of common equity tier one risk-based capital to total risk-weighted assets, as defined by regulatory framework. Counterparty risk in derivatives Credit Risk In Derivatives [Member] This member represents credit risk in derivatives. Total assets Assets Types of risks [domain] Types of risks [domain] Interest rate-related contracts Interest Rate-Related Contracts [Member] This member represents interest rate-related contracts Weight of downturn scenario Weight Of Downturn Scenario Weight Of Downturn Scenario Derivatives Assets Fair value Derivative financial assets Credit risk Credit risk [member] Schedule of own funds Disclosure Of Own Funds [Table Text Block] The disclosure of own funds. Minimum capital requirement, percent Minimum Capital Requirement, Percent Minimum Capital Requirement, Percent Debt Disclosure of borrowings [text block] Share capital Issued capital [member] Geographical areas [axis] Geographical areas [axis] Interest expenses Interest costs [abstract] Unrealized fair value changes Gains (Losses) Recognised In Profit Or Loss Attributable To Change In Unrealised Gains Or Losses For Assets And Liabilities Held At End Of Period, Fair Value Measurement The amount of gains (losses) recognised in profit or loss attributable to change in unrealised gains or losses for assets and liabilities held at end of period. Public sector entity Public Sector Entity [Member] Public Sector Entity [Member] Skr Sweden, Kronor Accumulated other comprehensive income and other reserves Accumulated other comprehensive income [member] Capital adequacy and liquidity situation Disclosure Of Capital Adequacy [Text Block] The entire disclosure for capital adequacy. Cash and cash equivalents Cash and cash equivalents at beginning of the period Cash and cash equivalents at end of the period Cash and cash equivalents Assets Assets [abstract] Insufficient coverage for non-performing exposures Insufficient Coverage For Non-Performing Exposures [Member] This member stands for insufficient coverage for non-performing exposures. Transfers into Level 3 of fair value hierarchy, liabilities Transfers into Level 3 of fair value hierarchy, liabilities Financial assets or liabilities at fair value through profit or loss Gains (Losses) On Assets And Liabilities At Fair Value Gain (loss) on financial instruments at fair value through profit or loss Net interest income Disclosure of interest income (expense) [text block] Credit spread, measurement input Credit spread, measurement input [member] Schedule of debt Disclosure of detailed information about borrowings [text block] Total liabilities and equity Equity and liabilities Provisions Provisions Multilateral development banks Multilateral Development Banks [Member] This member stands for Multilateral development banks. Revenue [abstract] Liquidity reserve Disclosure of nature and extent of risks arising from financial instruments [line items] Western Europe excl. Sweden West European Countries Excluding Sweden [Member] Region of Western European countries excluding Sweden. The period’s change in fair value originating from credit risk (+ income/- loss) Increase (decrease) in fair value of financial liability, attributable to changes in credit risk of liability Disclosure of impairment loss and reversal of impairment loss [table] Disclosure of impairment loss and reversal of impairment loss [table] Transfer to stage 2 Increase (Decrease) Through Transfers To Stage Two The increase (decrease) in financial assets resulting from transfers to stage two. Commitments Capital commitments [abstract] Debt securities issued Senior Securities Issued [Member] This member represents debt securities issued. Schedule of derivatives Disclosure of detailed information about hedging instruments [text block] Securities issued or guaranteed by sovereigns, central banks or multilateral development banks Securities Issued Or Guaranteed By Sovereigns, Central Banks Or Multilateral Development Banks [Member] Securities issued or guaranteed by sovereigns, central banks or multilateral development banks. Interest rate Interest rate risk [member] Capital adequacy Capital Adequacy [Abstract] Capital Adequacy Credit impairment of financial instruments [axis] Credit impairment of financial instruments [axis] USD United States of America, Dollars Schedule of financial assets and liabilities at fair value Disclosure of fair value of financial instruments [text block] Independently reviewed profit net of any foreseeable charge or dividend Independently Reviewed Profit Net Of Any Foreseeable Charge Or Dividend [Member] This member stands for independently reviewed profit net of any foreseeable charge or dividend. Correlation Correlation Significant Unobservable Inputs Assets Liabilities Net Correlation used as a significant Level 3 unobservable input for assets and liabilities. Loans to the public Loans to corporate entities Disclosure of impairment loss and reversal of impairment loss [line items] Disclosure of impairment loss and reversal of impairment loss [line items] Depreciations and impairment of non-financial assets Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss Settlements & sales Settlements And Sales, Fair Value Measurement, Liabilities The decrease in the fair value measurement of liabilities resulting from settlements & sales. Categories of financial liabilities [domain] Categories of financial liabilities [domain] Loans to the public Loans to corporate entities [member] CIRR-System [Abstract] No definition available. Investing activities Cash flows from (used in) investing activities [abstract] Commodity risk Commodity price risk [member] Transactions with related parties Disclosure of related party [text block] Classes of financial assets [domain] Classes of financial assets [domain] Capital base requirement of 3 percent Capital Base Requirement Relating To Leveraged Ratio Percentage of Capital base requirement relating to leverage ratio. Securities issued or guaranteed by municipalities or other public entities Securities Issued Or Guaranteed By Municipalities Or Other Public Entities [Member] Securities issued or guaranteed by municipalities or other public entities. Level 3 Level 3 of fair value hierarchy [member] Unobservable inputs [axis] Unobservable inputs [axis] Total capital requirement relating to Leverage ratio including Pillar 2 guidance Amount Of Total Capital Requirement Relating To Leverage Ratio Amount of total capital requirement relating to leverage ratio. Reconciliation of changes in fair value measurement, liabilities Reconciliation of changes in fair value measurement, liabilities [abstract] Derivatives in cash flow hedges Other comprehensive income, before tax, cash flow hedges Currency-related contracts Debt Exchange Rate Related Contracts [Member] This member represents debt exchange rate related contracts. Decreases in allowance account due to write-offs Decrease through write-off, financial assets Pillar 2 guidance Pillar Two Guidance For Leverage Ratio, Percentage Pillar Two Guidance For Leverage Ratio, Percentage Currency exchange-rate effects on all assets and liabilities excl. currency exchange-rate effects related to revaluation at fair value Foreign exchange effects Foreign exchange gain (loss) EUR Euro Member Countries, Euro of which Countercyclical buffer Countercyclical buffer Institution Specific Common Equity Tier One Capital Ratio Countercyclical Buffer Percentage of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, countercyclical buffer as defined by regulatory framework. Exchange-rate differences on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Transfer to stage 1 Increase (Decrease) Through Transfers To Stage One The increase (decrease) in financial assets resulting from transfers to stage one. Cash flow from operating activities Cash flows from (used in) operating activities Central and Eastern Europe Central And Eastern European Countries [Member] Region of Central East-European countries. Disclosure of detailed information about financial instruments [table] Disclosure of detailed information about financial instruments [table] Geographical areas [domain] Geographical areas [domain] Document Fiscal Year Focus Document Fiscal Year Focus Common Equity Tier 1 capital available to meet buffer requirements Amount of Institution Specific Common Equity Tier One Capital Ratio After Buffer Requirement Amount of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, after buffer requirement as defined by regulatory framework. Own credit risk Gains or losses on liabilities valued at fair value resulting from changes in own credit standing Reserve of change in fair value of financial liability attributable to change in credit risk of liability [member] Schedule of net results of financial transactions Disclosure Of Net Results Of Financial Transactions [Table Text Block] The disclosure for net results of financial transaction. Income tax paid Income taxes paid, classified as operating activities North America North America [Member] Levels of fair value hierarchy [axis] Levels of fair value hierarchy [axis] Other assets Other assets [member] Gains (losses) on financial instruments [abstract] Latin America Latin America [Member] Additional value adjustments due to prudent valuations Reserve Of Additional Value Adjustments Due To Prudent Valuation [Member] This member stands for additional value adjustments due to prudent valuation Pillar 2 guidance Risk-based Capital Requirement, Pillar Two Guidance Capital Ratio Percentage of pillar two guidance capital ratio to total risk-weighted assets, as defined by regulatory framework. Disclosure of credit risk exposure [table] Disclosure of credit risk exposure [table] Net Interest Income [Line Items] Net Interest Income [Line Items] Net Interest Income [Line Items] 8% 8% [Member] 8% Accounting policies Disclosure of material accounting policy information [text block] Other liabilities Other liabilities Loans Loans and advances to customers Impairment details Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Sensitivity impact on total comprehensive income Increase (Decrease) In Total Comprehensive Income Resulting From Sensitivity Analysis The amount of increase (decrease) in total comprehensive income resulting from sensitivity analysis Liquidity outflows Liquidity Outflows Amount of liquidity outflows used in calculate liquidity coverage ratio, calculated in accordance with the Commission Delegated Regulation. Classes Of Loans Held [Axis] Classes Of Loans Held [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table. Revaluation of defined benefit plans Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans Contracts related to commodities, credit risk, etc. Commodities Risk Credit Risk And Other Risk Contracts [Member] This member stands for commodities risk, credit risk and other risk contracts. Schedule of sensitivity analysis - level 3 Sensitivity analysis for types of market risk [text block] Other currencies Other Currency [Member] Central Index Key Entity Central Index Key Net items to be reclassified to profit or loss Other comprehensive income that will be reclassified to profit or loss, net of tax Adjustments for non-cash items in operating profit Adjustments to reconcile profit (loss) other than changes in working capital Schedule of net stable funding ratio Schedule of Net Stable Funding [Table Text Block] Tabular disclosure of net stable funding. Derivatives Liabilities Fair value Derivative financial liabilities Disclosure of credit risk exposure Disclosure of credit risk exposure [line items] Valuation techniques used in fair value measurement [axis] Valuation techniques used in fair value measurement [axis] of which Tier 1 requirement of 6 percent Amount of Tier One Risk Based Capital For Minimum Reserves To Risk Weighted Assets The minimum Tier one Capital required for minimum reserves purposes under the regulatory framework. Sensitivity, input depreciation, assets Reasonably Possible Decrease In Unobservable Input, Assets Reasonably Possible Decrease In Unobservable Input, Assets Schedule of balances and reconciliation of changes in loss allowances by stages Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [text block] Risk exposure amount Risk Exposure Amount The amount that represents the risk exposure amount. On-balance sheet exposures Onbalance Sheet Exposures For Leverage Ratio The amount of on-balance sheet exposure includes all balance sheet assets in their exposure measure, including on-balance sheet derivatives collateral and collateral for SFTs, with the exception of on-balance sheet derivative and SFT assets for calculating leverage ratio. Capital requirement exposure Capital Requirement Exposure Percentage of capital requirement related to exposure. Gross carrying amount Gross carrying amount [member] Liabilities and equity Equity and liabilities [abstract] Specialized lending Credit Risk In Specialized Lending [Member] This member represents credit risk in specialized lending of which Capital conservation buffer Amount of Institution Specific Common Equity Tier One Capital Ratio Capital Conservation Buffer Amount of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, Capital Conservation Buffer as defined by regulatory framework. Net interest income Interest income (expense) Discounted cash flow Discounted cash flow [member] Total Leverage ratio requirement Total Capital Requirement Relating To Leverage Ratio [Abstract] No definition available. Transfers from Level 3 Transfers out of Level 3 of fair value hierarchy, liabilities Operating profit before credit losses Operating Profit Before Net Credit Losses Operating Profit Before Net Credit Losses Risk Weighted Asset Calculation Methodology [Domain] Risk Weighted Asset Calculation Methodology [Domain] Approach for calculating risk-weighted assets as defined by regulatory framework. Liabilities Liabilities Excluding Derivatives And Accrued Expenses And Prepaid Revenues The carrying value as on the balance sheet date of liabilities excluding derivatives and accrued expenses and prepaid revenues. Other interest-bearing securities except loans Other Interest-Bearing Securities Except Loans [Member] This member stands for Other interest-bearing securities except loans. Pledged Assets And Contingent Liabilities [Abstract] No definition available. Financial liabilities at fair value through profit or loss, category Financial liabilities at fair value through profit or loss, category [member] Derecognition of financial instruments not measured at fair value through profit or loss Gain (Loss) Arising From Derecognition Of Financial Instruments Not Measured At Fair Value Through Profit Or Loss Gain (Loss) Arising From Derecognition Of Financial Instruments Not Measured At Fair Value Through Profit Or Loss Borrowing from credit institutions Borrowing From Credit Institutions [Member] This member stands for borrowing from credit institutions. Sensitivity, input depreciation, liabilities Percentage of reasonably possible decrease in unobservable input, liabilities Loans in the form of interest-bearing securities Loans In Form Of Interest Bearing Securities Loans In Form Of Interest Bearing Securities Loans to credit institutions Loans And Advances To Banks [Member] This member stands for loans and advances made to banks. Payment of lease liability Payments of lease liabilities, classified as financing activities 6% 6% [Member] 6% Total exposure measure Total Exposure Measures For Leverage Ratio The amount of total exposure measure for calculating leverage ratio. Liquidity coverage ratio Liquidity Coverage Ratio Represents the liquidity coverage ratio. Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period Total risk-based capital requirement including Pillar 2 guidance Risk Based Capital Requirements Amount of risk-based Capital to total risk-weighted assets, as defined by regulatory framework. Registrant Name Entity Registrant Name Basic earnings per share (in SEK per share) Basic earnings (loss) per share Capital expenditures Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets Liquidity risk Liquidity risk [member] Individual Pillar 2 requirement Pillar Two Capital Requirements, Percent Percentage of pillar two capital requirements to total risk-weighted assets, as defined by regulatory framework. Statement of cash flows [abstract] 4.5% 4.5% [Member] 4.5% Total own funds Capital Requirement Funds Amount of capital requirement of the entity's own funds, as defined by regulatory framework. Type of measurement of expected credit losses [axis] Type of measurement of expected credit losses [axis] Change in senior debt Cash Flows From (Used In) Due To Increase (Decrease) In Senior Debt The cash inflow (outflow) due to an increase (decrease) in senior debt Cash and cash equivalents Cash And Cash Equivalent [Member] This member stands for cash and cash equivalents. Accrued expenses and prepaid revenues Accruals and deferred income including contract liabilities Credit risk, standardized approach Standardized Approach Calculation [Member] Approach for calculating risk-weighted asset, as defined by regulatory framework, by multiplying amount of each asset or exposure by risk-weight percentage associated with type of asset or exposure, as determined by Standardized approach. Transfer to stage 3 Increase (Decrease) Through Transfers To Stage Three The increase (decrease) in financial assets resulting from transfers to stage 3. Guarantee commitments Estimated financial effect of contingent liabilities Derivatives, net Cash Flows From Derivatives Form Of Debt The cash inflow (outflow) from derivatives relating to debt. Schedule of pledged assets and contingent liabilities Disclosure Of Pledged Assets And Contingent Liabilities [Table Text Block] The disclosure of pledged assets and contingent liabilities. Own credit risk Other comprehensive income, before tax, change in fair value of financial liability attributable to change in credit risk of liability Denmark DENMARK Schedule of impairments Disclosure of impairment [Table Text Block] The disclosure for financial assets that are impaired. Operating profit CIRR-system Profit (Loss) From Continuing Operations Before Reimbursement Expenses Amount of profit (loss) from continuing operations before reimbursement expenses. All Currencies [Domain] All Currencies [Domain] Disclosure of detailed information about financial instruments [abstract] Schedule of fair value measurement of assets Disclosure of fair value measurement of assets [text block] Committed undisbursed loans Gross loan commitments Business cycle parameters for base scenario for PD segments Business Cycle Parameters For Base Scenario For Probability of Default Business cycle parameters for base scenario. Other comprehensive income related to: Other comprehensive income [abstract] Gains (+) and losses (-) through profit or loss Gains (Losses) Recognised In Profit Or Loss, Fair Value Measurement, Net Assets (Liabilities) The decrease (increase) in net assets (liabilities) due to losses (gains) recognised in profit or loss on the fair value measurement of net assets and liabilities. Disclosure of transactions between related parties [abstract] Switzerland SWITZERLAND Financial position for CIRR-system Subclassifications of assets, liabilities and equities [abstract] Disclosure of nature and extent of risks arising from financial instruments [abstract] Net credit losses Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9 Change in loss allowance Increase (decrease) in financial assets [abstract] Credit spreads (in basis points) Credit Spreads Significant Unobservable Inputs Assets Liabilities Net Credit spreads used as a significant Level 3 unobservable input for assets and liabilities. Expressed in basis points Transfers from Level 3 Transfers Out Of Level 3 Of Fair Value Hierarchy, Net Assets (Liabilities) Transfers Out Of Level 3 Of Fair Value Hierarchy, Net Assets (Liabilities) Austria AUSTRIA Classes of financial liabilities [axis] Classes of financial liabilities [axis] Classes of financial liabilities [domain] Classes of financial liabilities [domain] Other Other price risk [member] Schedule of information about CIRR-system Disclosure of S System [Table Text Block] The disclosure of information about CIRR-systems including financial statement location and results by type of loan. Disclosure of detailed information about hedging instruments [abstract] Belgium BELGIUM OCA Own Credit Adjustment [Member] This member stands for OCA (Own credit adjustment) reflects how the changes in SEK's credit rating affects the fair value of financial liabilities measured at fair value through profit and loss. Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table] Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table] Contingent liabilities Disclosure of contingent liabilities [abstract] Cash collateral under the security agreements for derivative contracts Financial assets pledged as collateral for liabilities or contingent liabilities Balances with National Debt Office Balances With Other Banks And National Debt Office [Member] Balances with other banks and National Debt Office. Tangible and intangible assets Property Plant And Equipment And Intangible Assets Property Plant And Equipment And Intangible Assets Total liabilities Liabilities AUD Australia, Dollars Reserves applied to cover established credit losses Reserves Applied To Cover Established Credit Losses The amount of reserves applied to cover established credit losses Interest expenses Interest Expenses Other Than Resolution Fee, Risk Tax And Regulatory Fee The amount of interest expenses other than resolution fee and risk tax. Net exposure Net Credit Exposure The amount of net exposure to loss resulting from credit risk. Exposure is reported as a positive number. Share capital Issued capital Prepaid expenses and accrued revenues Prepayments and accrued income including contract assets Central governments Central governments Central Governments [Member] This member stands for Central governments. Fair value related to credit risk Disclosure of credit risk exposure [abstract] Categories of financial assets [axis] Categories of financial assets [axis] Additional capital (pillar 2 guidance) of total leverage ratio exposure Percentage of Additional Capital (Pillar 2 Guidance) of Total Risk-Weighted Exposure Amount Represents the percentage of additional capital (pillar 2 guidance) of the total risk-weighted exposure amount. Profit before compensation to SEK Profit (Loss) From Continuing Operations Before Remuneration To Parent Company And Reimbursement Expenses Amount of income (loss) from continuing operations before deduction of remuneration to parent company and reimbursement expenses. Separate Separate [member] Accounting policies Description of accounting policies and methods of computation followed in interim financial statements [text block] Financial assets and liabilities at fair value Disclosure of fair value measurement [text block] Book value of financial liabilities Financial liabilities Loans in the form of interest-bearing securities Loans In Form Of Interest Bearing Securities [Member] This member stands for loans in the form of interest-bearing securities. Disclosure of nature and extent of risks arising from financial instruments [table] Disclosure of nature and extent of risks arising from financial instruments [table] Tax expenses Tax expense (income) Borrowing from credit institutions Deposits from banks Total capital requirement relating to Leverage ratio including Pillar 2 guidance Total Capital Requirement Relating to Leverage Ratio Percentage of total capital requirement relating to leverage ratio. Events after the reporting period Disclosure of events after reporting period [text block] Risk Weighted Asset Calculation Methodology [Axis] Risk Weighted Asset Calculation Methodology [Axis] Information by approach for calculating risk-weighted assets as defined by regulatory framework. Stage 1 12-month expected credit losses [member] Operating activities Cash flows from (used in) operating activities [abstract] Additional capital pillar 2 guidance Additional Pillar Two Guidance Percentage Percentage of additional pillar two guidance. Weight of base scenario Weight Of Base Scenario Weight Of Base Scenario Pledged assets and contingent liabilities Disclosure of other provisions, contingent liabilities and contingent assets [text block] Impairments Disclosure of impairment of assets [text block] Off-balance sheet exposures Offbalance Sheet Exposures For Leverage Ratio The amount of off-balance sheet exposure include commitments (including liquidity facilities), whether or not unconditionally cancellable, direct credit substitutes, acceptances, standby letters of credit, trade letters of credit, etc., for calculating leverage ratio. Type of measurement of expected credit losses [domain] Type of measurement of expected credit losses [domain] Fair value of financial liabilities Financial liabilities at beginning of period Financial liabilities at end of period Financial liabilities at fair value Financial liabilities, at fair value Document Period End Date Document Period End Date of which minimum requirement of 4.5 percent Amount of Institution Specific Common Equity Tier One Capital Ratio Minimum Common Equity Tier One Requirement Amount of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, as defined by regulatory framework. Number of scenarios prepared for each PD curve Number Of Scenarios Prepared For Each PD Curve Number Of Scenarios Prepared For Each PD Curve Other administrative expenses Administrative expenses Schedule of leverage ratio Leverage Ratio [Table Text Block] The disclosure of leverage ratio. Valuation techniques used in fair value measurement [domain] Valuation techniques used in fair value measurement [domain] Tax on items to be reclassified to profit or loss Income tax relating to components of other comprehensive income that will be reclassified to profit or loss United Kingdom UNITED KINGDOM Top of range Top of range [member] Total regulatory adjustments to Common Equity Tier 1 capital Regulatory Adjustments To Common Equity Tier One Capital Amount of total regulatory adjustments to Common Equity Tier 1 capital. Classes of financial instruments [axis] Classes of financial instruments [axis] EAD Exposure At Default The amount that represents the exposure at default. Other regulatory fees Other Regulatory Fees Other Regulatory Fees Type Of Exposure Class [Axis] Type Of Exposure Class [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table. Risk tax Risk Tax Amount of expenditure as per Law of Risk Tax. Document Type Document Type Spain SPAIN Classes of financial assets [axis] Classes of financial assets [axis] Net items not to be reclassified to profit or loss Other comprehensive income that will not be reclassified to profit or loss, net of tax Corporates Corporates [Member] This member represents corporates Foreign countries Foreign countries [member] Capital buffer requirements Amount of Capital Buffer Requirements Amount of capital buffer requirements. Schedule of financial assets and liabilities at fair value by class Disclosure of Fair Value, by Balance Sheet Grouping [Table Text Block] Disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. Tax on items not to be reclassified to profit or loss Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss Tier 1 capital ratio Tier One Capital Ratio Percentage of Tier one risk-based capital to risk-weighted assets, as defined by regulatory framework. Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Credit risk, IRB approach Advanced Approaches [Member] Approach for calculating risk-weighted asset, as defined by regulatory framework, by multiplying amount of each asset or exposure by risk-weight percentage associated with type of asset or exposure as determined by Advanced approach. Classes of assets [axis] Classes of assets [axis] Treasuries/government bonds Government debt instruments held Finland FINLAND Borrowings by name [domain] Borrowings by name [domain] Surplus value (+) /Deficit value (-), financial assets Surplus (Deficit) Comparing Fair Value To Carrying Value Of Financial Assets The surplus (deficit) when comparing fair value to carrying amount of financial assets. FX Foreign exchange risk Currency risk [member] France FRANCE Range [axis] Range [axis] Contracts related to commodities, credit risk, etc. Debt Contracts Related To Raw Materials Credit Risk [Member] This member represents debt contracts related to raw materials, credit risk etc. Components of equity [axis] Components of equity [axis] Exchange-rate differences Increase (decrease) through foreign exchange, financial assets Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] Loans IFRS Loans [Member] This member represents loans Operating profit Operating profit Profit (loss) before tax Total other comprehensive income Other comprehensive income Other comprehensive income Classes of liabilities [axis] Classes of liabilities [axis] Counterparties [domain] Counterparties [domain] Schedule of minimum capital requirements exclusive of buffers Minimum Capital Requirements Exclusive of Buffers [Table Text Block] The disclosure of minimum capital requirements exclusive of buffers. Currency-related contracts Currency-Related Contracts [Member] This member represents currency-related contracts Established credit losses Established Losses On Financial Assets The amount of established losses on financial assets during the reporting period. Cash flow for the period Increase (decrease) in cash and cash equivalents before effect of exchange rate changes Committed undisbursed loans, derivatives, etc. Undisbursed Loans Derivatives [Member] Undisbursed loans, derivatives [member] Summary of liquidity reserve Disclosure of liquidity risk [text block] Capital buffer requirements Percentage of Capital Buffer Requirements Percentage of capital buffer requirements. Schedule of fair value measurement of liabilities Disclosure of fair value measurement of liabilities [text block] CIRR-system CIRR-System [Member] This member stands for CIRR-System. Credit valuation adjustment risk Credit Valuation Adjustment Risk [Member] This member stands for the risk that the difference between the risk-free portfolio and the true portfolio value that takes into account the possibility if a counterparty's default. In other words, CVA represents the market value of the counterparty credit risk. Assets and liabilities [axis] Assets and liabilities [axis] Exchange rate differences Gains (Losses) Recognised In Profit Or Loss, Fair Value Measurement, Currency Exchange Rate Effects Liabilities The gains (losses) recognised in profit or loss on the fair value measurement of exchange-rate effects on liabilities. Sensitivity, input appreciation, liabilities Percentage of reasonably possible increase in unobservable input, liabilities Classes of financial instruments [domain] Classes of financial instruments [domain] Disclosure of financial assets that are either past due or impaired [abstract] Disclosure of financial assets that are either past due or impaired [abstract] Loans and off balance Disclosure of Loans and Off-Balance [Abstract] No definition available. Default exposures Default Exposures [Member] Exposures in default Net results of financial transactions Total net results of financial transactions Gain (Loss) On Financial Transactions Gain (Loss) On Financial Transactions Leverage ratio Tier One Leverage Ratio Tier 1 Leverage ratio as defined in the regulations. Total capital ratio Capital Ratio Percentage of capital to risk-weighted assets, as defined by regulatory framework. Gains (+) and losses (-) in other comprehensive income Gains (losses) recognised in other comprehensive income excluding exchange differences, fair value measurement, liabilities Total risk-based capital requirement Total Risk Based Capital Requirement [Abstract] Total Risk Based Capital Requirement Luxembourg LUXEMBOURG Sensitivity, input depreciation, liabilities Reasonably Possible Decrease In Unobservable Input, Liabilities Reasonably Possible Decrease In Unobservable Input, Liabilities Disclosure of objectives, policies and processes for managing capital [table] Disclosure of objectives, policies and processes for managing capital [table] Weighted average number of shares (in shares) Weighted average number of ordinary shares used in calculating basic earnings per share Latvia LATVIA Disclosure of significant unobservable inputs used in fair value measurement of assets Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] Settlements & sales Settlements And Sales, Fair Value Measurement, Net Assets (Liabilities) The decrease in the fair value measurement of net assets and liabilities resulting from settlements & sales. Weight of upturn scenario Weight of Upturn Scenario Weight of Upturn Scenario Schedule of exposures Disclosure of credit risk exposure [text block] Borrowings by name [axis] Borrowings by name [axis] Administrative remuneration CIRR-system Administrative Remuneration CIRR-System [Member] This member stands for administrative remuneration of CIRR-system. Net results of financial transactions Net Results Of Financial Transactions [Text Block] The entire disclosure of net results of financial transactions. Reserves Other reserves Debt Borrowings Accumulated impairment Accumulated impairment [member] Net Interest Income [Table] Net Interest Income [Table] No definition available. Sweden Country of domicile [member] Cash flow from investing activities Cash flows from (used in) investing activities Consolidated and separate financial statements [axis] Consolidated and separate financial statements [axis] CVA/DVA, net Net Credit Value Adjustment And Debt Value Adjustment [Member] This member stands for CVA (Credit value adjustment) and DVA (Debt value adjustment) reflect how the counterparties' credit risk as well as SEK's own credit rating affect the fair vale of derivatives. Derivatives Disclosure of derivative financial instruments [text block] Other interest-bearing securities except loans Other debt instruments held Pillar 2 guidance Risk-based Capital Requirement, Pillar Two Guidance, Amount Amount of pillar two guidance to total risk-weighted assets, as defined by regulatory framework. Cash flow from financing activities Cash flows from (used in) financing activities Personnel expenses Employee benefits expense Counterparties [axis] Counterparties [axis] Common Equity Tier 1 capital available to meet buffer requirements Institution Specific Common Equity Tier One Capital Ratio After Buffer Requirement Percentage of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, after buffer requirement as defined by regulatory framework. Accounting policies [Abstract] No definition available. Debt securities issued Senior Securities Issued Senior Securities Issued Exposures Disclosure of nature and extent of risks arising from financial instruments [text block] Changes in assets and liabilities from operating activities Increase (decrease) in working capital Lifetime expected credit losses Lifetime expected credit losses [member] Net remeasurement of loss allowance Net Remeasurement Of Loss Allowance The amount of the net remeasurement of loss allowance Increases due to origination and acquisition Increase through origination or purchase, financial assets Statement of changes in equity [table] Statement of changes in equity [table] Japan JAPAN Administrative remuneration to SEK Remuneration Paid The amount of remuneration paid to the parent company. Required stable funding Requiring Stable Funding Amount Amount of requiring stable funding. Equity Equity price risk [member] Consolidated Consolidated [member] IRB shortfall of credit risk adjustments to expected losses Negative Amounts Resulting From Calculation Of Expected Loss Amounts [Member] This member stands for negative amounts resulting from the calculation of expected loss amounts. Treasuries/governments bonds Treasuries And Governments Bonds [Member] This member stands for Treasuries/governments bonds. Total Common Equity Tier 1 capital Common Equity Tier One Capital, Amount Amount of Common Equity Tier One Risk-based Capital, as defined by regulatory framework. Types of risks [axis] Types of risks [axis] Classes of assets [domain] Classes of assets [domain] of which minimum requirement of 4.5 percent Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets The minimum Common Equity Tier One Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Current Fiscal Year End Date Current Fiscal Year End Date of which Countercyclical buffer Amount of Institution Specific Common Equity Tier One Capital Ratio Counter Cyclical Buffer Amount of Institution Specific Common Equity Tier One Risk-based Capital to total risk-weighted assets, Capital Conservation Buffer as defined by regulatory framework. Ireland IRELAND Gains (+) and losses (-) in other comprehensive income Gains (Losses) Recognised In Other Comprehensive Income, Fair Value Measurement, Net Assets (Liabilities) The decrease (increase) in net assets (liabilities) due to losses (gains) recognised in other comprehensive income on the fair value measurement of net assets and liabilities. Bottom of range Bottom of range [member] Stage 3 Financial instruments credit-impaired [member] Regional governments Regional governments Regional Governments [Member] This member stands for Regional governments. Non-credit-obligation assets Non-Credit-Obligation Assets [Member] This member stands for Assets without counterparty. Disclosure of detailed information about borrowings [line items] Disclosure of detailed information about borrowings [line items] Iceland ICELAND Italy ITALY Resolution fees refund Resolution Fees, Refund The amount of refund related to the charged resolution fee. Net profit Net profit Profit (loss) Deferred tax asset Net deferred tax assets Operational risk Operational Risk [Member] This member stands for the risk that the prospect of loss resulting from inadequate or failed procedures, systems or policies. Recovered credit losses Gain on recovery of loans and advances previously written off Capital requirements [axis] Capital requirements [axis] Book value of financial assets Financial assets Amendment Flag Amendment Flag Poland POLAND Components of equity [domain] Components of equity [domain] Resolution fee Resolution Fee The amount of resolution fee. Dividend Dividends recognised as distributions to owners Portugal PORTUGAL Asia excl. Japan Asia Excluding Japan [Member] Represents information pertaining to Asia excluding Japan. Type Of Exposure Class [Domain] Type Of Exposure Class [Domain] This member stands for all types of exposure by the entity. It also represents the standard value for the 'Types of exposure' axis if no other member is used. Capital base requirement of 8 percent Capital Required For Minimum Reserves To Risk Weighted Assets Capital ratio required for minimum reserves purposes under the regulatory framework. Total operating income Revenue and other operating income Fair value originating from credit risk (- liabilities increase/ + liabilities decrease) Accumulated increase (decrease) in fair value of financial liability, attributable to changes in credit risk of liability Classes Of Loans Held [Domain] Classes Of Loans Held [Domain] This member stands for all types of classes of loans held by the entity. Range [domain] Range [domain] Retained earnings Retained earnings [member] Interest income Total interest income Interest income Financial assets and liabilities at fair value in level 3 Reconciliation Of Changes In Fair Value Measurement Assets Liabilities Net [Abstract] N/a of which Tier 1 requirement of 6 percent Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Asset Tier One Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Pillar 2 capital requirements Pillar Two Capital Requirements Amount of pillar two capital requirements. Comprehensive income for the CIRR-system Analysis of income and expense [abstract] Capital base requirement of 8 percent Min. capital requirement Minimum Capital Requirements The amount that represents the minimum capital requirements. Capital requirements [domain] Capital requirements [domain] GBP United Kingdom, Pounds Provision ratio Expected credit loss rate Interest income Net Interest Income [Abstract] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Sensitivity, input appreciation, assets Reasonably Possible Increase In Unobservable Input, Assets Reasonably Possible Increase In Unobservable Input, Assets Categories of financial assets [domain] Categories of financial assets [domain] Reimbursement to (-) / from (+) the State Reimbursement Expenses The amount of reimbursement expenses. Carrying amount Carrying amount [member] Sensitivity, input appreciation, assets Percentage of reasonably possible increase in unobservable input, assets Capital base requirement of 3 percent Amount Of Capital Base Requirement Relating To Leveraged Ratio Amount of Capital base requirement relating to leverage ratio. Nominal amounts Notional amount 1.5% 1.5% [Member] 1.5% Unobservable inputs [domain] Unobservable inputs [domain] Changes in equity [abstract] Changes in equity [abstract] Hedge reserve Reserve of cash flow hedges [member] Norway NORWAY The Netherlands NETHERLANDS Surplus value (+) /Deficit value (-) financial liabilities Surplus (Deficit) Comparing Fair Value To Carrying Value Of Financial Liabilities The surplus (deficit) when comparing fair value to carrying amount of financial liabilities. Stage 2 Financial instruments not credit-impaired [member] Currency [Axis] Currency [Axis] Middle East/Africa/Turkey Middle East, Africa And Turkey [Member] Represents information pertaining to the Middle East, Africa or Turkey. Intangible assets Reserve Of Intangible Assets [Member] This member stands for reserve of intangible assets. Diluted earnings per share (in SEK per share) Diluted earnings (loss) per share CIRR-system Disclosure of S System [Text Block] The entire disclosure of S-systems. Categories of financial liabilities [axis] Categories of financial liabilities [axis] Montenegro MONTENEGRO Credit impairment of financial instruments [domain] Credit impairment of financial instruments [domain] Financial assets and liabilities at fair value, at the beginning of period Financial assets and liabilities at fair value, at the end of period Net assets (liabilities) Assets (liabilities) Schedule of liquidity coverage ratio Schedule of Liquidity Coverage [Table Text Block] Tabular disclosure of Liquidity coverage. Defined benefit plans Reserve of remeasurements of defined benefit plans [member] Option Model Option pricing model [member] Percentage of net exposures Percentage Of Net Exposures Represents the percentage of net exposures. Disclosure of objectives, policies and processes for managing capital [line items] Disclosure of objectives, policies and processes for managing capital [line items]