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Financial Instruments - Fair Values and Risk Management - Summary of Sensitivity to Reasonably Possible Change in Foreign Exchange Rates and Impact on Profit Before Tax (Detail) - Market risk [member] - EUR (€) € in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Increase in basis points [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Change in foreign exchange rates	5.00%	5.00%	5.00%
Effect on profit before tax	€ 4,287	€ 5,381	€ 2,161
Decrease in basis points [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Change in foreign exchange rates	(5.00%)	(5.00%)	(5.00%)
Effect on profit before tax	€ (4,798)	€ (5,113)	€ (2,447)