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Operating Costs and Non-underlying Items - Summary of Non-underlying Items Related to Gross Profit and Operating Costs (Detail) - EUR (€) € in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 02, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of non underlying items [Abstract] |  |  |  |
Non-underlying items within operating profit before tax |  | € 3,176 | € (543) | € (823)
Acquisition and disposal-related costs |  | 76 | (159) | (132)
Gain/(loss) on disposal of group companies | € 4,331 | 4,331 | 334 | (95)
Restructuring costs |  | (914) | (638) | (578)
Impairments and other one-off items |  | (317) | (80) | (18)
Tax on non-underlying items within operating profit |  | (259) | 77 | 213
Non-underlying items within operating profit after tax |  | 2,917 | (466) | (610)
Non-underlying items not in operating profit but within net profit before tax |  | 154 | (382) |
Premium paid on buyback of preference shares |  |  | (382) |
Share of gain on disposal of Spreads business in Portugal JV |  | 32 |  |
Net monetary gain arising from hyperinflationary economies |  | 122 |  |
Tax impact of non-underlying items not in operating profit but within net profit |  | (29) | 578 |
Tax on premium paid on buyback of preference shares (non deductible) |  | 0 | 0 | 0
Impact of US tax reform |  | (29) | 578 |
Non-underlying items not in operating profit but within net profit after tax |  | 125 | 196 |
Non-underlying items after tax |  | 3,042 | (270) | (610)
Attributable to: |  |  |  |
Non-controlling interest |  | 18 | (8) | (9)
Shareholders' equity |  | € 3,024 | € (262) | € (601)

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- Definition The amount of expense relating to restructuring. Restructuring is a programme that is planned and controlled by management and materially changes either the scope of a business undertaken by an entity or the manner in which that business is conducted. Such programmes include: (a) the sale or termination of a line of business; (b) closure of business locations in a country or region or the relocation of activities from one country or region to another; (c) changes in management structure; and (d) fundamental reorganisations that have a material effect on the nature and focus of the entity's operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 98 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_98_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The gains (losses) representing the difference resulting from the restatement of non-monetary assets, owners' equity and items in the statement of comprehensive income and the adjustment of index linked assets and liabilities in hyperinflationary reporting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 29 -IssueDate 2017-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=29&date=2017-03-01&anchor=para_9&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Acquisition and disposal related costs. + References No definition available. + Details
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- Definition Gain (loss) on disposal of group companies. + References No definition available. + Details
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