XML 238 R231.htm IDEA: XBRL DOCUMENT v3.8.0.1

Costs (Details 8) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Costs
Write-Off of tangible assets	€ 239	€ 289	€ 678
Write-Off of intangible assets	24	61	10
Write-Off of Tangible And Intangible Assets	€ 263	€ 350	€ 688

X

- References

No definition available.

+ Details

Name:	E_DisclosureOfOperatingExpensesAbstract
Namespace Prefix:	E_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of write-off of intangible assets.

+ References

No definition available.

+ Details

Name:	E_WriteOffOfIntangibleAssets
Namespace Prefix:	E_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount recognised resulting from the write-off of tangible assets.

+ References

No definition available.

+ Details

Name:	E_WriteOffOfTangibleAssets
Namespace Prefix:	E_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of write off of tangible and intangible assets.

+ References

No definition available.

+ Details

Name:	E_WriteoffOfTangibleAndIntangibleAssets
Namespace Prefix:	E_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration