v3.25.3
Goodwill and Other Intangible Assets - Schedule of Movements in Other Intangible Assets (Details) - EUR (€)
€ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
 [2]
Dec. 31, 2024
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets [1] € 20,431   € 22,629
Amortization expense [1] (777) € (898)  
Other intangible assets, ending balance 20,431    
Gross value      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets 75,175   81,066
Changes in scope of consolidation 500    
Acquisitions and other increases 676    
Disposals and other decreases (228)    
Currency translation differences (6,547)    
Transfers (292)    
Accumulated amortization and impairment      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets (54,744)   (58,437)
Disposals and other decreases 229    
Currency translation differences 4,239    
Transfers 287    
Amortization expense (852)    
Impairment losses, net of reversals (210)    
Acquired R&D      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets     8,369
Other intangible assets, ending balance 8,048    
Acquired R&D | Gross value      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets 12,297   12,866
Changes in scope of consolidation 500    
Acquisitions and other increases 332    
Disposals and other decreases (22)    
Currency translation differences (1,339)    
Transfers (40)    
Acquired R&D | Accumulated amortization and impairment      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets (4,249)   (4,497)
Disposals and other decreases 22    
Currency translation differences 427    
Transfers 0    
Amortization expense 0    
Impairment losses, net of reversals (201)    
Products, trademarks and other rights      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets     13,841
Other intangible assets, ending balance 11,984    
Products, trademarks and other rights | Gross value      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets 61,048   66,348
Changes in scope of consolidation 0    
Acquisitions and other increases 302    
Disposals and other decreases (199)    
Currency translation differences (5,159)    
Transfers (244)    
Products, trademarks and other rights | Accumulated amortization and impairment      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets (49,064)   (52,507)
Disposals and other decreases 199    
Currency translation differences 3,772    
Transfers 281    
Amortization expense (800)    
Impairment losses, net of reversals (9)    
Software      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets     419
Other intangible assets, ending balance 399    
Software | Gross value      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets 1,830   1,852
Changes in scope of consolidation 0    
Acquisitions and other increases 42    
Disposals and other decreases (7)    
Currency translation differences (49)    
Transfers (8)    
Software | Accumulated amortization and impairment      
Disclosure of detailed information about intangible assets [line items]      
Carrying amount of intangible assets (1,431)   € (1,433)
Disposals and other decreases 8    
Currency translation differences 40    
Transfers 6    
Amortization expense (52)    
Impairment losses, net of reversals € 0    
[1] These unaudited condensed half year consolidated financial statements as of June 30, 2025 should be read in conjunction with Sanofi’s audited consolidated financial statements as of December 31, 2024.
[2] Figures for the 2024 comparative period have been re-presented on a consistent basis to reflect the classification of Opella as a discontinued operation.