Trade Accounts Receivable - Aging Analysis of Trade Accounts Receivable and the Allowance For Doubtful Accounts (Details) - EUR (€)	Mar. 31, 2019	Dec. 31, 2018
Aging Analysis of Trade Accounts Receivable
Trade accounts receivable	€ 3,980,307,000	€ 3,455,721,000
less allowance for doubtful accounts	(123,416,000)	(118,015,000)
Trade accounts receivable, net	€ 3,856,891,000	€ 3,337,706,000

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