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List of principal companies included in the scope of consolidation during 2022 (Tables)
 12 Months Ended
Dec. 31, 2022
Interests In Other Entities [Abstract]  
Summary of Principal Companies and their Country of Incorporation
The table below shows Sanofi's principal subsidiaries and their country of incorporation:
EuropeFinancial interest (%) as of December 31, 2022
Hoechst GmbHGermany100.0 
Sanofi-Aventis Deutschland GmbHGermany100.0 
A. Nattermann & Cie. GmbHGermany100.0 
Sanofi-Aventis GmbHAustria100.0 
Sanofi BelgiumBelgium100.0 
Ablynx N.V.Belgium100.0 
Genzyme Flanders BVBABelgium100.0 
Sanofi A/SDenmark100.0 
Sanofi-Aventis S.A.Spain100.0 
Opella Healthcare Spain, S.L.Spain100.0 
Sanofi OyFinland100.0 
SanofiFrance100.0 
Sanofi-Aventis FranceFrance100.0 
Sanofi Winthrop IndustrieFrance100.0 
Sanofi-Aventis Recherche & DéveloppementFrance100.0 
Sanofi-Aventis GroupeFrance100.0 
Sanofi ChimieFrance100.0 
Sanofi-Aventis ParticipationsFrance100.0 
Sanofi PasteurFrance100.0 
Aventis Pharma S.A.France100.0 
Sanofi BiotechnologyFrance100.0 
Sanofi Mature IPFrance100.0 
Sanofi Pasteur NVLFrance100.0 
Sanofi Pasteur EuropeFrance100.0 
SECIPE SASFrance100.0 
Sanofi Pasteur Merieux S.A.S.France100.0 
Sanofi 2015 D SASFrance100.0 
Opella Healthcare International SASFrance100.0 
Opella Healthcare France SASFrance100.0 
Opella Healthcare Group SASFrance100.0 
Sanofi-Aventis A.E.B.E.Greece100.0 
Sanofi-Aventis Private Co, LtdHungary99.6 
Chinoin Private Co. LtdHungary99.6 
Opella Healthcare Hungary Commercial K.F.THungary100.0 
Carraig Insurance DACIreland100.0 
Genzyme Ireland LimitedIreland100.0 
Sanofi-Aventis Holdings (Ireland) LtdIreland100.0 
Sanofi S.R.L.Italy100.0 
Opella Healthcare Italy S.R.L.Italy100.0 
Genzyme Global SarlLuxembourg100.0 
Genzyme Luxembourg SarlLuxembourg100.0 
Sanofi-Aventis Norge ASNorway100.0 
Genzyme Europe B.V.Netherlands100.0 
Sanofi Foreign Participations B.V.Netherlands100.0 
Sanofi-Aventis Sp. z.o.o.Poland100.0 
Opella Healthcare Poland sp.Z.O.OPoland100.0 
Sanofi Pasteur Sp. z.o.o.Poland100.0 
Sanofi Produtos Farmaceuticos LdaPortugal100.0 
Sanofi-Aventis, s.r.o.Czech Republic100.0 
Opella Healthcare Czech s.r.oCzech Republic100.0 
Sanofi Romania SRLRomania100.0 
EuropeFinancial interest (%) as of December 31, 2022
Opella Healthcare Romania S.R.L.Romania100.0 
Sanofi-Aventis UK Holdings LimitedUnited Kingdom100.0 
Aventis Pharma LimitedUnited Kingdom100.0 
Sanofi-Synthelabo UK LtdUnited Kingdom100.0 
Aventis Pharma Holdings LtdUnited Kingdom100.0 
Opella Healthcare UK LimitedUnited Kingdom100.0 
AO Sanofi RussiaRussia100.0 
Opella Healthcare LLCRussia100.0 
Sanofi ABSweden100.0 
Sanofi-Aventis (Suisse) SASwitzerland100.0 
Genzyme Global Sarl Baar Intellectual Property BranchSwitzerland100.0 
Sanofi Ilac Sanayi ve Ticaret A.S.Turkey100.0 
Sanofi Pasteur Asi Ticaret A.S.Turkey100.0 
Sanofi Saglik Urunleri Limited SirketiTurkey100.0 
United StatesFinancial interest (%) as of December 31, 2022
Genzyme Therapeutic Products Limited PartnershipUnited States100.0 
Aventis Inc.United States100.0 
Sanofi US Services Inc.United States100.0 
Sanofi-Aventis U.S. LLCUnited States100.0 
Chattem, Inc.United States100.0 
Aventisub LLCUnited States100.0 
Genzyme CorporationUnited States100.0 
Sanofi Pasteur Inc.United States100.0 
VaxServe, Inc.United States100.0 
Bioverativ Inc.United States100.0 
Bioverativ U.S. LLCUnited States100.0 
Bioverativ Therapeutics Inc.United States100.0 
Principia Biopharma Inc.United States100.0 
Sanofi Research Invest LLCUnited States100.0 
Sanofi Bioverativ Holdings LLCUnited States100.0 
RPR US Ltd.United States100.0 
Kadmon Holdings, Inc.United States100.0 
Kadmon Corporation, LLCUnited States100.0 
AmunixUnited States100.0 
Synthorx, IncUnited States100.0 
Translate Bio, IncUnited States100.0 
Other CountriesFinancial interest (%) as of December 31, 2022
Sanofi-Aventis South Africa (Pty) LtdSouth Africa100.0 
Sanofi-Aventis AlgérieAlgeria100.0 
Sanofi Arabia Trading Company LimitedSaudi Arabia75.0 
Sanofi-Aventis Argentina S.A.Argentina100.0 
Genzyme de Argentina S.A.Argentina100.0 
Opella Healthcare Argentina S.A.U.Argentina100.0 
Sanofi-Aventis Healthcare Pty LtdAustralia100.0 
Sanofi-Aventis Australia Pty LtdAustralia100.0 
Sanofi Medley Farmaceutica LtdaBrazil100.0 
Sanofi-Aventis Canada Inc.Canada100.0 
Sanofi Pasteur LimitedCanada100.0 
Merieux Canada Holdings ULC (Canada)Canada100.0 
Sanofi-Aventis de Chile S.A.Chile100.0 
Sanofi (Hangzhou) Pharmaceuticals Co., LtdChina100.0 
Sanofi (China) Investment Co., LtdChina100.0 
Sanofi (Beijing) Pharmaceuticals Co.LtdChina100.0 
Sanofi Pasteur Biologies Co., LtdChina100.0 
Shenzhen Sanofi pasteur Biological Products Co, LtdChina100.0 
Shanghai Rongheng Pharmaceutical Co, LtdChina100.0 
Genfar S.A.Colombia100.0 
Sanofi-Aventis de Colombia S.A.Colombia100.0 
Sanofi-Aventis Korea Co. LtdSouth Korea100.0 
Sanofi Pasteur LtdSouth Korea100.0 
Opella healthcare Korea Inc.South Korea100.0 
Sanofi-Aventis Gulf FZEUnited Arab Emirates100.0 
Sanofi EgyptEgypt99.8 
Opella Healthcare Egypt LLCEgypt100.0 
Sanofi Hong-Kong LimitedHong Kong100.0 
Sanofi India LimitedIndia60.4 
Sanofi Healthcare India Private LimitedIndia99.9 
Sanofi-Aventis Israël LtdIsrael100.0 
Sanofi K.K.Japan100.0 
SSP Co.,LtdJapan100.0 
Sanofi-Aventis (Malaysia) SDN. BHD.Malaysia100.0 
Sanofi-Aventis MarocMorocco100.0 
Sanofi-Aventis de Mexico S.A. de C.V.Mexico100.0 
Sanofi Pasteur S.A. de C.V.Mexico100.0 
Azteca Vacunas, S.A. de C.V.Mexico100.0 
Sanofi-Aventis Pakistan LimitedPakistan52.9 
Sanofi-Aventis de Panama S.A.Panama100.0 
Sanofi-Aventis del Peru S.A.Peru100.0 
Sanofi-Aventis Puerto Rico IncPuerto Rico100.0 
Sanofi-Aventis Philippines Inc.Philippines100.0 
Opella Healthcare Philippines Inc.Philippines100.0 
Sanofi-Aventis Singapore Pte. LtdSingapore100.0 
Aventis Pharma (Manufacturing) Pte. LtdSingapore100.0 
Sanofi Manufacturing Pte LtdSingapore100.0 
Sanofi Taiwan Co., LtdTaiwan100.0 
Sanofi-Aventis (Thailand) LtdThailand100.0 
Sanofi-Aventis de Venezuela S.A.Venezuela100.0 
Sanofi-Aventis Vietnam Company LimitedVietnam100.0 
Sanofi Vietnam Shareholding Company LimitedVietnam85.0 
Summary of Principal Investments Accounted for Using the Equity Method
Financial interest (%) as of December 31, 2022
GlaxoSmithKline Consumer Healthcare, L.P.United States11.7 
Infraserv GmbH & Co. Höchst KGGermany31.2 
MapharMorocco48.3 
MCM Vaccine B.V.Netherlands50.0 
MSP Vaccine Company (formerly MCM company)United States50.0 
EUROAPIFrance30.1