The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Section A Statement of cash flows for an entity other than a financial institution
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=sect_AStatementofcashflowsforanentityotherthanafinancialinstitution&doctype=Illustrative%20Examples
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 21
-IssueDate 2018-01-01
-Paragraph 52
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2018-03-01&anchor=para_52_a&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Finance Income and Expense - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018 EUR (€)	Mar. 31, 2018 EUR (€)	Jun. 30, 2017 EUR (€)	Jun. 30, 2018 EUR (€)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 EUR (€)	Jun. 30, 2017 USD ($)
Finance Income Expense [line items]
Foreign exchange gain 9loss) \| €	€ 6.9	€ (2.8)	€ (12.0)	€ 4.1		€ (12.0)
Foreign currency denominated cash and cash equivalent accounts and investment					$ 40.9		$ 92.6
Private placements [member]
Finance Income Expense [line items]
Increase in cash, cash equivalents					$ 55.8