Related Party Transactions (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Executive Board and Supervisory Board Members
Related Party Transactions
Revenue from rendering of services	€ 0	€ 0
Companies controlled by members of the Supervisory Board Member
Related Party Transactions
Sale of products and services	2	1
Purchase of products and services	5	3
Sponsoring and other financial support	4	4
Amount owed to related parties	0	0
Amount owed from related parties	€ 0	0
Term of commitments	6 years
Commitments made by the entity	€ 21	28
Supervisory Board Members
Related Party Transactions
Amount owed to related parties	0	0
Services received	€ 1	€ 1

The amounts payable resulting from related party transactions. [Refer: Related parties [member]]

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- Definition

The amounts receivable resulting from related party transactions. [Refer: Related parties [member]]

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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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- Definition

The amount of outstanding commitments made by the entity in related party transactions. [Refer: Related parties [member]]

+ References

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- Definition

The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Related parties [member]]

+ References

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- Definition

The amount of services received in related party transactions. [Refer: Related parties [member]]

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- Definition

The periods of commitments to purchase further goods or services and to provide further sponsoring and other financial support, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The amount of goods and services purchased by the entity in related party transactions.

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- Definition

The amount of sale of products and services to companies controlled by members of the Supervisory Board

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- Definition

This amount of related-party sponsoring and financial support made by the entity.

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