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Income Tax Expense - Summary of Difference Between Effective Tax Rate and Standard Corporate Income Tax Rate (Details) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Income taxes paid (refund) [abstract] |  |  |
Standard tax rate applicable in France | 25.80% | 25.80% | 25.80%
Difference between the standard French tax rate and the rates applicable to Sanofi | (8.20%) | (10.80%) | (6.50%)
Revisions to tax exposures and settlements of tax disputes | 0.50% | (2.80%) | (0.80%)
Fair value remeasurement of contingent consideration liabilities | 0.00% | (0.40%) | (0.20%)
Other | (0.80%) | 1.70% | 0.90%
Effective tax rate | 17.30% | 13.50% | 19.20%

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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 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Tax rate effects, in aggregate, on the reconciliation between the average effective tax rate and the applicable tax rate that the entity does not separately disclose in the reconciliation. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the application of foreign tax rates. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Revisions to tax exposures and settlements of tax disputes. + References No definition available. + Details
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- Definition Tax Rate Effect Of Fair Value Remeasurement Of Contingent Considerations + References No definition available. + Details
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