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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
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of non underlying items [Abstract] |  |  |
Non-underlying items within operating profit before tax | € (1,064) | € (1,239) | € 3,176
Acquisition and disposal-related costs | (69) | (132) | 76
Gain on disposal of group companies | 8 | 70 | 4,331
Restructuring costs | (916) | (1,159) | (914)
Impairments |  | (18) | (208)
Other | (87) |  | (109)
Tax on non-underlying items within operating profit | 272 | 309 | (259)
Non-underlying items within operating profit after tax | (792) | (930) | 2,917
Non-underlying items not in operating profit but within net profit before tax | (36) | 35 | 154
Share of gain on disposal of Spreads business in Portugal JV |  | 3 | 32
Interest related to the UK tax audit of intangible income and centralised services | (56) |  |
Net monetary gain arising from hyperinflationary economies | 20 | 32 | 122
Tax impact of non-underlying items not in operating profit but within net profit | (146) | (196) | (29)
Impact of US tax reform |  |  | (29)
Taxes related to the reorganisation of our European business | (58) | (175) |
Taxes charges related to share buyback as part of Unification | (30) |  |
Taxes related to the UK tax audit of intangible income and centralised services | (53) |  |
Hyperinflation adjustment for Argentina deferred tax | (5) | (21) |
Non-underlying items not in operating profit but within net profit after tax | (182) | (161) | 125
Non-underlying items after tax | (974) | (1,091) | 3,042
Attributable to: |  |  |
Non-controlling interest | (23) | (28) | 18
Shareholders' equity | € (951) | € (1,063) | € 3,024

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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 2020-01-01 -Paragraph 98 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_98_b&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=29&code=ifrs-tx-2020-en-r&anchor=para_9&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_d_ii&doctype=Standard -URIDate 2020-01-01 + Details
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