XML 275 R171.htm IDEA: XBRL DOCUMENT
v3.21.1

Share Based Compensation - Summary of Number of Shares and Synthetic Shares (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 shares | Dec. 31, 2019 shares
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required |  | 1,820,800
Members of Executive Board [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 11,500,000 |
Granted shares | 3,000,000 |
Outstanding beginning | 3,400,000 |
Exercised during 2020 | (1,300,000) |
Increase due to performance condition 2020 | 800,000 |
Outstanding ending | 3,800,000 |
Members of Executive Board [member] | LTV 2020 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 2,500,000 |
Granted shares | 900,000 |
Increase due to performance condition 2020 | 400,000 |
Outstanding ending | 1,300,000 |
Members of Executive Board [member] | LTV 2019 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 3,000,000 |
Granted shares | 600,000 |
Outstanding beginning | 900,000 |
Outstanding ending | 900,000 |
Members of Executive Board [member] | LTV 2018 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 3,000,000 |
Granted shares | 800,000 |
Outstanding beginning | 1,200,000 |
Increase due to performance condition 2020 | 400,000 |
Outstanding ending | 1,600,000 |
Members of Executive Board [member] | LTV 2017 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 3,000,000 |
Granted shares | 700,000 |
Outstanding beginning | 1,300,000 |
Exercised during 2020 | (1,300,000) |
The President and CEO [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Granted shares | 1,500,000 |
Outstanding beginning | 1,900,000 |
Exercised during 2020 | (900,000) |
Increase due to performance condition 2020 | 200,000 |
Outstanding ending | 1,600,000 |
The President and CEO [member] | LTV 2020 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Granted shares | 400,000 |
Increase due to performance condition 2020 | 200,000 |
Outstanding ending | 600,000 |
The President and CEO [member] | LTV 2019 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Granted shares | 300,000 |
Outstanding beginning | 400,000 |
Outstanding ending | 400,000 |
The President and CEO [member] | LTV 2018 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Granted shares | 400,000 |
Outstanding beginning | 600,000 |
Outstanding ending | 600,000 |
The President and CEO [member] | LTV 2017 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Granted shares | 400,000 |
Outstanding beginning | 900,000 |
Exercised during 2020 | (900,000) |
Synthetic shares [member] | Executive performance plan [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 4,300,000 |
Synthetic shares [member] | Executive performance plan [member] | EPP 2020 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 1,700,000 |
Synthetic shares [member] | Executive performance plan [member] | EPP 2019 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 1,000,000 |
Synthetic shares [member] | Executive performance plan [member] | EPP 2018 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 1,600,000 |
Synthetic shares [member] | Key contributor plan [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 25,800,000 |
Synthetic shares [member] | Key contributor plan [member] | Key Contributor Plan 2020 (KC Plan 2020) [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 11,300,000 |
Synthetic shares [member] | Key contributor plan [member] | Key Contributor Plan2019 |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 6,200,000 |
Synthetic shares [member] | Key contributor plan [member] | Key contributor plan 2018 [member] |  |
Disclosure of terms and conditions of share based payment arrangement [line Items] |  |
Maximum shares required | 8,300,000 |

X
- Definition Increase due to performance condition + References No definition available. + Details
Name: | eric_IncreaseDueToPerformanceCondition
Namespace Prefix: | eric_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_d&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_i&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_vi&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfOutstandingShareOptions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of share options exercised in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_iv&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfSharesIssued
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_EntityContactPersonnelContactPersonTypeAxis=eric_MembersOfExecutiveBoardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=eric_TwoThousandTwentyLongTermVariableCompensationProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=eric_TwoThousandNineteenLongTermVariableCompensationProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=eric_TwoThousandEighteenLongTermVariableCompensationProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=eric_TwoThousandSeventeenLongTermVariableCompensationProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityContactPersonnelContactPersonTypeAxis=eric_PresidentAndChiefExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfOrdinarySharesAxis=eric_SyntheticSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_PlanName1Axis=eric_ExecutivePerformancePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_ShareBasedPaymentAwardDateAxis=eric_TwoThousandTwentyExecutivePerformancePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_ShareBasedPaymentAwardDateAxis=eric_TwoThousandNineteenExecutivePerformancePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_ShareBasedPaymentAwardDateAxis=eric_TwoThousandEighteenExecutivePerformancePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_PlanName1Axis=eric_KeyContributorPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_ShareBasedPaymentAwardDateAxis=eric_KeyContributorPlan2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_ShareBasedPaymentAwardDateAxis=eric_KeyContributorPlan2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | eric_ShareBasedPaymentAwardDateAxis=eric_KeyContributorPlan2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |