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v3.22.1

Employee Information - Summary of Board Members, Presidents and Group Management by Gender (Detail) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Women [member] | Parent [member] |  |
Disclosure of Information About Employees [line items] |  |
Board members and President | 23.00% | 23.00%
Group Management | 20.00% | 20.00%
Women [member] | Subsidiaries [member] |  |
Disclosure of Information About Employees [line items] |  |
Board members and President | 21.00% | 19.00%
Men [member] | Parent [member] |  |
Disclosure of Information About Employees [line items] |  |
Board members and President | 77.00% | 77.00%
Group Management | 80.00% | 80.00%
Men [member] | Subsidiaries [member] |  |
Disclosure of Information About Employees [line items] |  |
Board members and President | 79.00% | 81.00%

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- Definition Line items representing the information about employees. + References No definition available. + Details
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- Definition Percentage of board members and president. + References No definition available. + Details
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Namespace Prefix: | eric_
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Balance Type: | na
Period Type: | duration

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- Definition Percentage of group management. + References No definition available. + Details
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Namespace Prefix: | eric_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |