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Remuneration of Auditors - Summary of Services from Auditors and its Associates (Parenthetical) (Detail) - EUR (€) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Auditors Remuneration [Line Items] |  |  |
Total statutory audit fees | € 14,000,000 | € 14,000,000 | € 14,000,000
Top of range [member] |  |  |
Disclosure of Auditors Remuneration [Line Items] |  |  |
Services supplied to associated pension schemes | 1,000,000 | 1,000,000 | 1,000,000
Amount paid in relation to each type of non-statutory audit services | 1,000,000 | 1,000,000 | 1,000,000
Spreads [Member] |  |  |
Disclosure of Auditors Remuneration [Line Items] |  |  |
Services relating to corporate finance transactions portion subject to tax | 5,000,000 |  |
KPMG Accountants N.V. [Member] |  |  |
Disclosure of Auditors Remuneration [Line Items] |  |  |
Total statutory audit fees | 1,000,000 | 1,000,000 | 1,000,000
KPMG LLP [Member] |  |  |
Disclosure of Auditors Remuneration [Line Items] |  |  |
Total statutory audit fees | € 4,000,000 | € 3,000,000 | € 4,000,000

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- Definition The amount of fees paid or payable to the entity's auditors for auditing services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_112_c&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_112_c&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition Auditor remuneration for audits and reviews of spreads carve out financial statements. + References No definition available. + Details
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- Definition Auditor's remuneration for services supplied to associated pension schemes. + References No definition available. + Details
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- Definition Disclosure of auditors remuneration. + 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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