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Financial Risk Management - Disclosure of Customer Finance Fair Value Reconciliation (Detail) - SEK (kr) kr in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure Of Customer Finance Reconciliation [Abstract] |  |
Opening balance | kr 3,137 | kr 3,756
Additions | 30,121 | 24,765
Disposals/repayments | (30,468) | (25,069)
Revaluation | 322 | (66)
Translation difference | 175 | (249)
Closing balance | 3,287 | 3,137
Of which non-current | kr 568 | kr 1,221

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- Definition Disclosure of customer finance reconciliation. + References No definition available. + Details
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- Definition Fair value reconciliation of customer finance. + References No definition available. + Details
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- Definition Fair value reconciliation of customer finance additions. + References No definition available. + Details
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- Definition Fair value reconciliation of customer finance disposals and repayments. + References No definition available. + Details
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- Definition Fair value reconciliation of customer finance non current. + References No definition available. + Details
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- Definition Fair value reconciliation of customer finance revaluation. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Fair value reconciliation of customer finance translation difference. + References No definition available. + Details
Name: | eric_FairValueReconciliationOfCustomerFinanceTranslationDifference
Namespace Prefix: | eric_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration