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Treasury Risk Management - Summary of Financial Assets are Subject to Offsetting, Enforceable Master Netting Arrangements and Similar Agreements (Detail) - Derivative Financial Assets [Member] - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of offsetting of financial assets [Line Items] |  |
Gross amounts of recognized financial assets | € 276 | € 400
Gross amounts of recognised financial assets set off in the balance sheet | (103) | (174)
Net amounts of financial assets presented in the balance sheet | 173 | 226
Financial instruments | (108) | (147)
Cash collateral received | (6) |
Net amount | € 59 | € 79

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- Definition The amount of cash collateral received that is subject to an enforceable master netting arrangement or similar agreement and that is not set off against financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph IG40D -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_IG40D&doctype=Implementation%20Guidance -URIDate 2016-03-31 + Details
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- Definition The amount of financial instruments subject to an enforceable master netting arrangement or similar agreement that are not set off against financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph IG40D -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_IG40D&doctype=Implementation%20Guidance -URIDate 2016-03-31 + Details
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- Definition The gross amount of recognised financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 13C -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_13C_a&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of financial liabilities set off against financial assets when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 13C -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_13C_b&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount remaining after deducting the amounts subject to an enforceable master netting arrangement or similar agreement that were not set off against financial assets, from the net amount of financial assets subject to offsetting or subject to an enforceable master netting arrangement or similar agreement presented in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2016-01-13 -Paragraph 13C -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_13C_e&doctype=Standard -URIDate 2016-03-31 + Details
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