Intangible assets and goodwill - Goodwill and intangible assets with indefinite useful Life (Details) - EUR (€)	Jun. 30, 2018	Dec. 31, 2017
Disclosure of geographic region
Goodwill	€ 11,806,784,000	€ 12,103,921,000
Intangible assets other than goodwill	€ 654,520,000	€ 683,058,000

The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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