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DEFERRED INCOME TAXES - Narrative (Details) - EUR (€) € in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Income Taxes [Abstract] |  |  |
Net deferred tax asset balance | € 183 | € 161 | € 141
Deductible temporary differences and unused tax losses for which no deferred tax asset recognized | 920 | 1,009 |
Related tax impact | € 224 | € 259 |

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- Definition Deductible Temporary Differences And Unused Tax Losses For Which No Deferred Tax Asset Is Recognised + References No definition available. + Details
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- Definition Income Taxes [Abstract] + References No definition available. + Details
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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_e&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 + Details
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