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Deferred Tax - Schedule of Loss Carryforward Period and Deferred Corporate Income Tax Assets Not Recognized (Detail) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets and liabilities [Line Items] |  |
Gross amounts | € 613 | € 490
Not recognized deferred tax asset | 182 | 142
Less than 5 years [member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Gross amounts | 79 | 65
Not recognized deferred tax asset | 20 | 15
Over 5 through 10 years [member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Gross amounts | 18 | 21
Not recognized deferred tax asset | 4 | 5
Over 10 through 15 years [member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Gross amounts | 27 | 20
Not recognized deferred tax asset | 51 | 36
Over 15 through 20 years [member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Gross amounts | 1 |
Indefinitely [member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Gross amounts | 488 | 385
Not recognized deferred tax asset | € 107 | € 86

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- Definition Deferred tax assets and liabilities line items + References No definition available. + Details
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- Definition Unused tax credits carry forward. + References No definition available. + Details
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- Definition The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_e&doctype=Standard -URIDate 2019-03-27 + Details
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