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Financial Instruments - Schedule of Sensitivity Analysis of Equity (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Increase Equity [Member] | USD [Member] |  |
Schedule of Sensitivity Analysis of Equity [Line Items] |  |
Change in the exchange rate | € 667 | € (90)
Increase Equity [Member] | NIS [Member] |  |
Schedule of Sensitivity Analysis of Equity [Line Items] |  |
Change in the exchange rate | (12,915) | (9,471)
Decrease Equity [Member] | USD [Member] |  |
Schedule of Sensitivity Analysis of Equity [Line Items] |  |
Change in the exchange rate | (737) | 99
Decrease Equity [Member] | NIS [Member] |  |
Schedule of Sensitivity Analysis of Equity [Line Items] |  |
Change in the exchange rate | € 12,915 | € 9,471

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- Definition Change in exchange rate of increase (decrease) of equity. + References No definition available. + Details
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Namespace Prefix: | ello_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | ello_FinancialInstrumentsScheduleofSensitivityAnalysisofEquityDetailsLineItems
Namespace Prefix: | ello_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=currency_ILS
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ello_DecreaseEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |