| Fact | Value | Period | Source |
|---|
| industry_sic | {"code": "3663", "scheme": "SIC", "description": "Radio & Tv Broadcasting & Communications | | sec_edgar |
| observed_web_domain | {"via": "wikidata:P856", "domain": "ericsson.com"} | | robots_obs |
| website | {"qid": "Q52618", "url": "https://www.ericsson.com/", "via": "wikidata"} | | wikidata |
| xbrl:AcquisitionsThroughBusinessCombinationsOtherProvisions | {"unit": "SEK", "value": 0} | 2023-12-31 | sec_edgar |
| xbrl:AcquisitionsThroughBusinessCombinationsOtherProvisions | {"unit": "SEK", "value": 1050000000} | 2022-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfDiscountRates | {"value": 0.018} | 2019-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfDiscountRates | {"value": 0.026} | 2018-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfDiscountRates | {"value": 0.025} | 2017-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfDiscountRates | {"value": 0.028} | 2016-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfLifeExpectancyAfterRetirement | {"unit": "Y", "value": 23} | 2018-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfLifeExpectancyAfterRetirement | {"unit": "Y", "value": 23} | 2017-12-31 | sec_edgar |
| xbrl:ActuarialAssumptionOfLifeExpectancyAfterRetirement | {"unit": "Y", "value": 23} | 2016-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 92000000} | 2025-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -229000000} | 2024-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 267000000} | 2023-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 1118000000} | 2022-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -49000000} | 2021-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 10000000} | 2020-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -775000000} | 2019-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -124000000} | 2018-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 396000000} | 2017-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 405000000} | 2016-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -6286000000} | 2025-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -4958000000} | 2024-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -943000000} | 2023-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -29031000000} | 2022-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -287000000} | 2021-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 9247000000} | 2020-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 12443000000} | 2019-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 261000000} | 2018-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -2110000000} | 2017-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -8255000000} | 2016-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -33000000} | 2025-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 2825000000} | 2024-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 347000000} | 2023-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 3236000000} | 2022-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 350000000} | 2021-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 320000000} | 2020-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -126000000} | 2019-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": -613000000} | 2018-12-31 | sec_edgar |
| xbrl:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset | {"unit": "SEK", "value": 219000000} | 2017-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2025-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2024-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2023-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2022-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2021-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2020-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2019-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2018-12-31 | sec_edgar |
| xbrl:AdditionalPaidinCapital | {"unit": "SEK", "value": 24731000000} | 2017-12-31 | sec_edgar |
| xbrl:AdditionalProvisionsOtherProvisions | {"unit": "SEK", "value": 6737000000} | 2025-12-31 | sec_edgar |
| xbrl:AdditionalProvisionsOtherProvisions | {"unit": "SEK", "value": 9345000000} | 2024-12-31 | sec_edgar |
| xbrl:AdditionalProvisionsOtherProvisions | {"unit": "SEK", "value": 10477000000} | 2023-12-31 | sec_edgar |
| xbrl:AdditionalProvisionsOtherProvisions | {"unit": "SEK", "value": 6785000000} | 2022-12-31 | sec_edgar |
| xbrl:AdditionalProvisionsOtherProvisions | {"unit": "SEK", "value": 4423000000} | 2021-12-31 | sec_edgar |
| xbrl:AdditionalProvisionsOtherProvisions | {"unit": "SEK", "value": 5247000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3342000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3339000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3330000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3334000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3332000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3326000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3320000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3291000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3277000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3303000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustedWeightedAverageShares | {"unit": "shares", "value": 3282000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 3611000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 3980000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 4458000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 3577000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 2507000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 1989000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 2538000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 3946000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 4348000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 4465000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForAmortisationExpense | {"unit": "SEK", "value": 5518000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": 610000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": 162000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": -118000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": -253000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": 337000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": 175000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": 2237000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": 392000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": -83000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": -489000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForCurrentTaxOfPriorPeriod | {"unit": "SEK", "value": -104000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": 929000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": 10208000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": 9304000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": -7740000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": -5565000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": 384000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": 261000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": -4807000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": 4719000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": -1756000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInInventories | {"unit": "SEK", "value": -366000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"unit": "SEK", "value": 1380000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"unit": "SEK", "value": 5933000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"unit": "SEK", "value": 7000000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 10074000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 2540000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 3189000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 5383000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 6576000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 10436000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": 6870000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForDeferredTaxExpense | {"unit": "SEK", "value": -1897000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 9241000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 25734000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 43889000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 10543000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 8969000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 8674000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 9089000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 8318000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 27892000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 9119000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"unit": "SEK", "value": 10227000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 3247000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 3861000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 4272000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 4114000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 3674000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 3602000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 3587000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 3275000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 4103000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 4421000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForDepreciationExpense | {"unit": "SEK", "value": 4705000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 234000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 282000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 662000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 274000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 198000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 512000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 360000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 568000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 2211000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": 148000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment | {"unit": "SEK", "value": -16000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": 1485000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": 4598000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": -7088000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": 5794000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": 4014000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": -560000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"unit": "SEK", "value": -1579000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 462000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 496000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": -10037000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": -1995000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 1385000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 4303000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": -372000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 2436000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 1886000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": 3301000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"unit": "SEK", "value": -2676000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 30617000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 51710000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 17638000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 17143000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 19931000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 17832000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 7830000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 19324000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 5863000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsForReconcileProfitLoss | {"unit": "SEK", "value": 10611000000} | 2015-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": -19000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": 348000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": -104000000} | 2023-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": -3000000} | 2022-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": 270000000} | 2021-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": 331000000} | 2020-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": 340000000} | 2019-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": -53000000} | 2018-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": -21000000} | 2017-12-31 | sec_edgar |
| xbrl:AdjustmentsForUndistributedProfitsOfAssociates | {"unit": "SEK", "value": 26000000} | 2016-12-31 | sec_edgar |
| xbrl:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"unit": "SEK", "value": 10793000000} | 2025-12-31 | sec_edgar |
| xbrl:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"unit": "SEK", "value": 30617000000} | 2024-12-31 | sec_edgar |
| xbrl:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"unit": "SEK", "value": 51710000000} | 2023-12-31 | sec_edgar |
| xbrl:AmortisationExpense | {"unit": "SEK", "value": 1989000000} | 2020-12-31 | sec_edgar |
| xbrl:AmortisationExpense | {"unit": "SEK", "value": 2538000000} | 2019-12-31 | sec_edgar |
| xbrl:AmortisationExpense | {"unit": "SEK", "value": 3946000000} | 2018-12-31 | sec_edgar |
| xbrl:AmortisationExpense | {"unit": "SEK", "value": 4348000000} | 2017-12-31 | sec_edgar |
| xbrl:AmortisationExpense | {"unit": "SEK", "value": 4465000000} | 2016-12-31 | sec_edgar |
| xbrl:AmortisationExpense | {"unit": "SEK", "value": 5518000000} | 2015-12-31 | sec_edgar |
| xbrl:ApplicableTaxRate | {"value": 0.206} | 2023-12-31 | sec_edgar |
| xbrl:ApplicableTaxRate | {"value": 0.206} | 2022-12-31 | sec_edgar |
| xbrl:ApplicableTaxRate | {"value": 0.206} | 2021-12-31 | sec_edgar |
| xbrl:ApplicableTaxRate | {"value": 0.214} | 2019-12-31 | sec_edgar |
| xbrl:ApplicableTaxRate | {"value": 0.22} | 2018-12-31 | sec_edgar |
| xbrl:ApplicableTaxRate | {"value": 0.22} | 2017-12-31 | sec_edgar |
| xbrl:AssetbackedSecuritiesAmountContributedToFairValueOfPlanAssets | {"unit": "SEK", "value": 9632000000} | 2025-12-31 | sec_edgar |
| xbrl:AssetbackedSecuritiesAmountContributedToFairValueOfPlanAssets | {"unit": "SEK", "value": 9911000000} | 2024-12-31 | sec_edgar |
| xbrl:AssetbackedSecuritiesAmountContributedToFairValueOfPlanAssets | {"unit": "SEK", "value": 4116000000} | 2023-12-31 | sec_edgar |