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Derivative Financial Instruments - Summary of Information Regarding the Contract Amount in Estimated Fair Value of All of the Group's Forward Exchange Contacts (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Derivative Financial Instruments [line items]
Contract amount	€ 40,366	€ 43,645
Unrealised gains (losses)	(627)	(102)
Financial liabilities at fair value, class [member]
Disclosure Of Derivative Financial Instruments [line items]
Contract amount	29,947	16,186
Unrealised gains (losses)	(772)	(320)
Financial assets at fair value, class [member]
Disclosure Of Derivative Financial Instruments [line items]
Contract amount	10,419	27,459
Unrealised gains (losses)	€ 145	€ 218

X

- Definition

The gains (losses) recognised in other comprehensive income on change in value of forward elements of forward contracts, net of tax. [Refer: Other comprehensive income]

+ References

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- Definition

The gains (losses) recognised in profit or loss for assets measured at fair value that are attributable to the change in unrealised gains or losses relating to those assets held at the end of the reporting period. [Refer: At fair value [member]]

+ References

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Disclosure Of Derivative Financial Instruments [line items]

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