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v3.23.2

Segment Information - Principal Customers and Credit Risk (Details) | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Certain wholesalers in the United States |  |
Disclosure of information about major customers and credit risk [line items] |  |
Percentage of entity's revenue | 27.00% |
Customer one |  |
Disclosure of information about major customers and credit risk [line items] |  |
Percentage of entity's revenue | 11.00% | 12.00%
Customer two |  |
Disclosure of information about major customers and credit risk [line items] |  |
Percentage of entity's revenue | 9.00% | 8.00%
Customer three |  |
Disclosure of information about major customers and credit risk [line items] |  |
Percentage of entity's revenue | 7.00% | 7.00%

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- Definition The percentage of the entity's revenue. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 8 -IssueDate 2022-03-24 -Paragraph 34 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2022-en-r&anchor=para_34&doctype=Standard -URIDate 2022-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of information about major customers and credit risk. + References No definition available. + Details
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Namespace Prefix: | sny_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Balance Type: |
Period Type: |