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Income Tax - Summary of Income Tax Reconciliation Using Composite Statutory Income Tax Rate Applicable by Tax Jurisdictions (Parenthetical) (Detail) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of tax reconciliation using composite statutory income tax rate applicable by tax jurisdictions [line Items] |  |  |  |  |  |
Income tax rate |  |  |  | 31.90% | 24.90% | 38.20%
Change in tax rate |  |  |  | € (11) | € (6) |
United States [member] |  |  |  |  |  |
Disclosure of tax reconciliation using composite statutory income tax rate applicable by tax jurisdictions [line Items] |  |  |  |  |  |
Income tax rate |  |  | 27.00% | 40.00% | 40.00% | 40.00%
Change in tax rate |  |  |  | € (16) |  |
France [member] |  |  |  |  |  |
Disclosure of tax reconciliation using composite statutory income tax rate applicable by tax jurisdictions [line Items] |  |  |  |  |  |
Income tax rate | 25.82% | 28.92% |  | 39.20% | 34.43% | 38.00%

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to changes in the tax rate. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_i&doctype=Standard -URIDate 2017-03-09 + Details
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