Fixed assets - Dismantling provision - Current and non-current (Details) - EUR (€) € in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other intangible assets and property, plant and equipment [abstract]
Total dismantling provisions	€ 825	€ 776	€ 789	€ 737
o/w non-current provisions	810	765	774
o/w current provisions	€ 15	€ 11	€ 15

The amount of non-current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 37
-IssueDate 2019-01-01
-Section D Examples: disclosures
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-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 37
-IssueDate 2019-01-01
-Paragraph 87
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_87&doctype=Standard
-URIDate 2019-03-27

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The amount of provision for costs related to decommissioning, restoration and rehabilitation. [Refer: Other provisions]

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The amount of current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs]

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Other intangible assets and property, plant and equipment [abstract]

+ References

No definition available.

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