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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
	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%

X

- 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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X

- 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

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X

- References

No definition available.

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X

- 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

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X

- 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.

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- Definition

Tax Rate Effect Of Fair Value Remeasurement Of Contingent Considerations

+ References

No definition available.

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