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Debt, Cash and Cash Equivalents - Additional Information (Details) € in Millions, $ in Billions | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 EUR (€) extension bond | Jun. 30, 2023 USD ($) bond | Jun. 30, 2023 USD ($) extension | Mar. 08, 2023 EUR (€) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 EUR (€)
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Number of bond issues redeemed | bond | 2 | 2 |  |  |  |
€1.75 billion bonds maturing March 2023 |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Notional amount |  |  |  |  |  | € 1,750.0
€1 billion bonds maturing June 2023 |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Notional amount | $ |  |  |  |  | $ 1.0 |
Syndicated credit facility, expires in 2027 |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Notional amount | € 4,000.0 |  |  |  |  |
Syndicated credit facility, expires in 2028 |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Notional amount | € 4,000.0 |  |  |  |  |
Credit facilities, number of extension options | extension | 2 |  | 2 |  |  |
Credit facilities, extension option period | 1 year | 1 year |  |  |  |
Syndicated credit facility canceled |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Notional amount |  |  |  | € 4,000.0 |  |
Commercial paper program in France |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Commercial paper programs | € 6,000.0 |  |  |  |  |
Commercial paper program in France | Sanofi Euro Medium Term Notes |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Borrowing, average drawdown | € 39.0 |  |  |  |  |
Commercial paper program in USA |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Commercial paper programs | $ |  |  | $ 10.0 |  |  |
Commercial paper program in USA | Sanofi Euro Medium Term Notes |  |  |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |  |  |
Borrowing, average drawdown | $ |  | $ 2.0 |  |  |  |

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