Investments in Joint Ventures - Schedule of Investments in Joint Ventures (Detail) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of joint ventures [abstract]
Beginning balance	€ 1,712	€ 1,614
Additions	120	81
Disposals	(211)
Share in net income	210	161	€ 137
Share in changes in joint ventures equity (note 32.6)	8	(15)
Dividend	(94)	(118)
Net exchange difference	4	(17)
Other	(5)	7
Ending balance	€ 1,745	€ 1,712	€ 1,614

Additions to Investments in joint ventures.

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- Definition

Increase (decrease) through changes in foreign exchange rates of investments in associates and joint ventures.

+ References

No definition available.

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- Definition

Investments in joint ventures disposals.

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No definition available.

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- Definition

Investments in joint ventures other.

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No definition available.

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- Definition

Share in changes in joint ventures equity.

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No definition available.

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No definition available.

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- Definition

The amount of dividends received.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph B12
-Subparagraph a
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- Definition

The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Joint ventures [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2018-01-01
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The entity's share of the profit (loss) of joint ventures accounted for using the equity method. [Refer: Investments accounted for using equity method; Joint ventures [member]; Profit (loss)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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