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Goodwill and Intangible Assets - Summary of Net Book Value Goodwill and Intangible Assets (Parenthetical) (Detail) - EUR (€) € in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Indefinite-life intangible assets that have significant carrying value | [1] | € 34,941 | € 31,029
Horlicks [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Indefinite-life intangible assets that have significant carrying value |  | 2,718 | 0
Knorr [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Indefinite-life intangible assets that have significant carrying value |  | 1,744 | 1,816
Carver Korea [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Indefinite-life intangible assets that have significant carrying value |  | 1,468 | 1,509
Hellmann's [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Indefinite-life intangible assets that have significant carrying value |  | € 1,112 | € 1,220
[1] | Within indefinite-life intangible assets there are four existing brands that have a significant carrying value: Horlicks €2,718 million (2019: €nil), Knorr €1,744 milion (2019: €1,816 million), Carver Korea €1,468 million (2019: €1,509 million) and Hellmann’s €1,112 million (2019: €1,220 million). The Horlicks brand was acquired in 2020 and the valuation is provisional.

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- Definition The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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