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Financial Instruments - Fair Values and Risk Management - Summary of Sensitivity to Reasonably Possible Change in Interest Rates on that Portion of Loans and Borrowings Affected (Detail) - Market risk [member] - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Increase in basis points [member] |  |
Disclosure of credit risk exposure [line items] |  |
Effect on profit before tax | € 2,776 | € 3,023
Decrease in basis points [member] |  |
Disclosure of credit risk exposure [line items] |  |
Effect on profit before tax | € (3,183) | € (3,449)
Floating-rate borrowings [member] | Increase in basis points [member] |  |
Disclosure of credit risk exposure [line items] |  |
Increase/decrease in basis points | + 45 | - 45
Effect on profit before tax | € (71) | € (90)
Floating-rate borrowings [member] | Decrease in basis points [member] |  |
Disclosure of credit risk exposure [line items] |  |
Increase/decrease in basis points | - 45 | - 45
Effect on profit before tax | € 71 | € 78

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- Definition The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_7&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Sensitivity analysis impact on profit or loss before tax. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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