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Goodwill and Intangible Assets - Additional Information (Detail) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 Divisions GeographicalAreas | Dec. 31, 2019 EUR (€)
Disclosure of detailed information about intangible assets [line items] |  |
Number of divisions included in cash generating units | Divisions | 3 |
Number of geographical areas included in cash generating units | GeographicalAreas | 3 |
Number of cash generating units | 10 |
Impairment of goodwill | € |  | € 18
Pre-tax discount rate |  | 7.40%
Projection period | 5 years |
Bottom of range [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Pre-tax discount rate | 6.00% |
Top of range [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Amortisation period of finite-life intangible assets | ten years |
Pre-tax discount rate | 7.40% |

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- Definition Description of useful life used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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