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Investee Companies and other investments (Schedule of Composition of Advances on Account of Investments) (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of associates [line items]
Advances on account of investments	€ 1,554
Total advances on account of investment	2,423	883
Manara PSP [Member]
Disclosure of associates [line items]
Advances on account of investments	869	883
Development of PV Projects of Italy [Member]
Disclosure of associates [line items]
Advances on account of investments	€ 1,554

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- Definition

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- Definition

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- 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.

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