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35. Related-party transactions (Details 1) - ARS ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | $ (188,627) | $ (150,457) | $ (149,891)
PESA |  |  |
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | (86,098) | (60,944) | (67,642)
SACME |  |  |
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | (81,698) | (68,960) | (65,298)
Salaverri, Dellatorre, Burgio y Wetzler Malbran |  |  |
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | 0 | (876) | (6,365)
PYSSA |  |  |
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | 0 | 0 | (39)
OSV |  |  |
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | (19,521) | (18,965) | (11,474)
ABELOVICH, POLANO & ASSOC. |  |  |
SummaryOfRelatedpartyTransactionsLineItems [Line Items] |  |  |
Related-party expense | $ (1,310) | $ (712) | $ 0

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Namespace Prefix: | EDN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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Namespace Prefix: | EDN_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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Name: | dei_LegalEntityAxis=EDN_PESAMember
Namespace Prefix: |
Data Type: | na
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Name: | dei_LegalEntityAxis=EDN_SACMEMember
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: |
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- Details
Name: | dei_LegalEntityAxis=EDN_PYSSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=EDN_OSVAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=EDN_AbelovichPolanoAssociatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |