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Principal accountants' fees and services | 12 Months Ended
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Dec. 31, 2024
Analysis of income and expense [abstract] |
Principal accountants' fees and services | E/ Principal accountants’ fees and services PricewaterhouseCoopers Audit and Forvis Mazars SA served as independent auditors of Sanofi for the year ended December 31, 2024, and PricewaterhouseCoopers Audit and Ernst & Young in 2023. The table below shows fees charged by those firms and member firms of their networks to Sanofi and consolidated subsidiaries in the years ended December 31, 2024 and 2023.
| Forvis Mazars | PricewaterhouseCoopers | Ernst & Young
| 2024 | 2024 | 2023 | 2023
(€ million) | Amount | % | Amount | % | Amount | % | Amount | %
Statutory audit of separate and consolidated financial statements(a) | 11.5 | 93% | 19.7 | 73% | 14.7 | 72% | 15.1 | 74%
Limited review of sustainability statement(b) | 0.6 | 5% | 1.0 | 4% | — | —% | — | —%
Services other than statutory audit(c) | 0.2 | 2% | 6.4 | 23% | 5.8 | 28% | 5.4 | 26%
Audit-related services(d)(e) | 0.2 |  | 6.4 |  | 5.8 |  | 5.3 |
Tax | 0.0 |  | 0.0 |  | — |  | — |
Other | — |  | — |  | — |  | 0.1 |
Total | 12.3 | 100% | 27.1 | 100% | 20.5 | 100% | 20.5 | 100%
(a)Includes services provided by the independent auditors of the parent company and French subsidiaries: Forvis Mazars €4.8 million in 2024; PricewaterhouseCoopers Audit €12.5 million in 2024, €8.3 million in 2023 and Ernst & Young €7.9 million in 2023. (b)For SEC purposes, these Services are classified as Other. (c)Services other than statutory audit provided by Forvis Mazars during 2024 comprised: - assurance engagements, agreed-upon procedures, tax compliance work and technical consultancy. Services other than statutory audit provided by PricewaterhouseCoopers during 2024 comprised: - contractual audits, including on the combined financial statements of the Opella business; - additional procedures to enable reports previously signed by the firm to be incorporated by reference; and - assurance engagements, agreed-upon procedures, tax compliance work and technical consultancy. (d)Includes services provided by the independent auditors of the parent company and French subsidiaries: Forvis Mazars: €0.1 million in 2024,; PricewaterhouseCoopers Audit €3.5 million in 2024,€3.6 million in 2023 and Ernst & Young €5.2 million in 2023. (e)Includes €0.5 million for services that can only be provided by the statutory auditors, such as comfort letters, attestation services required by regulation (which qualify as audit fees under SEC rules).

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- Definition The disclosure of compensation to the entity's auditors. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_10_e&doctype=Standard -URIDate 2023-03-23 + Details
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