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Principal accountants' fees and services (Tables) | 12 Months Ended
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Dec. 31, 2023
Analysis of income and expense [abstract] |
Disclosure of Accountants' Fees and Services | 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, 2023 and 2022.
| Ernst & Young | PricewaterhouseCoopers
| 2023 | 2022 | 2023 | 2022
(€ million) | Amount | % | Amount | % | Amount | % | Amount | %
Audit: Statutory audit of separate and consolidated financial statements(a) | 15.1 |  | 74 | % | 14.2 |  | 89 | % | 14.7 |  | 72 | % | 14.1 |  | 97 | %
Services other than statutory audit(b) | 5.4 |  | 26 | % | 1.8 |  | 11 | % | 5.8 |  | 28 | % | 0.5 |  | 3 | %
Audit-related services(c)(d) | 5.3 |  |  | 1.5 |  |  | 5.8 |  |  | 0.5 |  |
Tax | 0.0 |  |  | — |  |  | 0.0 |  |  | — |  |
Other | 0.1 |  |  | 0.3 |  |  | — |  |  | — |  |
Total | 20.5 |  | 100 | % | 16.0 |  | 100 | % | 20.5 |  | 100 | % | 14.6 |  | 100 | %
(a) Includes services provided by the independent auditors of the parent company and French subsidiaries: Ernst & Young €7.9 million in 2023, €7.3 million in 2022; PricewaterhouseCoopers Audit €8.3 million in 2023, €7.7 million in 2022. (b) Services other than statutory audit provided by Ernst & Young during 2023 comprised: - contractual audits, including on the combined financial statements of the Consumer Healthcare business; - additional procedures to enable reports previously signed by the firm to be incorporated by reference; - assurance engagements, agreed-upon procedures, tax compliance work and technical consultancy; and - issuance of the Independent Third Party’s report on the consolidated statement of extra-financial performance. Services other than statutory audit provided by PricewaterhouseCoopers during 2023 comprised: - contractual audits, including on the combined financial statements of the Consumer Healthcare 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. (c) Includes services provided by the independent auditors of the parent company and French subsidiaries: Ernst & Young: €5.2 million in 2023, €1.4 million in 2022; PricewaterhouseCoopers Audit €5.3 million in 2023, €0.3 million in 2022. (d) 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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