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Business Combinations - Summary of Business Divestments Transactions (Detail) - Divestments 2018-2020 [member] | 12 Months Ended
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Dec. 31, 2020
MediaKind [member] |
Disclosure Of Business Divestitures [Line Items] |
Divestments, Company | MediaKind
Divestments, Description | A divestment of 51% of its MediaKind business.
Business Divestments, transaction date | Feb 2019
Ericsson Local Services AB [member] |
Disclosure Of Business Divestitures [Line Items] |
Divestments, Company | Ericsson Local Services AB (LSS)
Divestments, Description | A divestment of the Local Services company in Sweden.
Business Divestments, transaction date | Aug 2018
Excellence Field Factory [member] |
Disclosure Of Business Divestitures [Line Items] |
Divestments, Company | Excellence Field Factory
Divestments, Description | A divestment of the Spanish fiber service operations.
Business Divestments, transaction date | Jun 2018

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- Definition Date of divestments. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Description of divestments. + References No definition available. + Details
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Balance Type: | na
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- Definition Disclosure of detailed information on business divestitures. + References No definition available. + Details
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Balance Type: | na
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- Definition Name of business sold. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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