Trade Accounts Receivable - Aging Analysis of Trade Accounts Receivable and the Allowance For Doubtful Accounts (Details) - EUR (€)	Jun. 30, 2018	Dec. 31, 2017
Aging Analysis of Trade Accounts Receivable
Trade accounts receivable	€ 3,668,256,000	€ 3,864,217,000
less allowance for doubtful accounts	(116,041,000)	(474,891,000)
Trade accounts receivable, net	€ 3,552,215,000	€ 3,389,326,000

The amount due from customers for goods and services sold.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 78
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_b&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_TradeReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant