XML 150 R93.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Summary of significant accounting policies - Share-Based Payment (Details) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Stock option plans |  |
Disclosure Of Detailed Information About Share-Based Payment [Line Items] |  |
Option vesting period (in years) |  | 4 years
Restricted share plans |  |
Disclosure Of Detailed Information About Share-Based Payment [Line Items] |  |
Award vesting period (in years) | 3 years |

X
- Definition Disclosure Of Detailed Information About Share-Based Payment + References No definition available. + Details
Name: | sny_DisclosureOfDetailedInformationAboutShareBasedPaymentLineItems
Namespace Prefix: | sny_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Option vesting period. + References No definition available. + Details
Name: | sny_OptionVestingPeriod
Namespace Prefix: | sny_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period + References No definition available. + Details
Name: | sny_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod
Namespace Prefix: | sny_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=sny_StockOptionPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=sny_RestrictedSharePlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |