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Goodwill and intangible assets (Details 1) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]      
Net book value $ 60,945 $ 63,777  
Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 51,357 53,919  
Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 9,230 9,603  
Operating segments [member] | Corporate      
Disclosure of detailed information about intangible assets [line items]      
Net book value 358 255  
Goodwill      
Disclosure of detailed information about intangible assets [line items]      
Net book value 29,301 29,595 $ 29,999
Goodwill | Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 21,531 21,562  
Goodwill | Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 7,770 8,026  
Goodwill | Operating segments [member] | Corporate      
Disclosure of detailed information about intangible assets [line items]      
Net book value   7  
Intangible Assets other than Goodwill      
Disclosure of detailed information about intangible assets [line items]      
Net book value 31,644 34,182 36,809
Intangible Assets other than Goodwill | Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 29,826 32,357  
Intangible Assets other than Goodwill | Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 1,460 1,577  
Intangible Assets other than Goodwill | Operating segments [member] | Corporate      
Disclosure of detailed information about intangible assets [line items]      
Net book value 358 248  
Acquired research and development [member]      
Disclosure of detailed information about intangible assets [line items]      
Net book value 4,421 5,499 4,700
Acquired research and development [member] | Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 4,186 5,313  
Acquired research and development [member] | Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 235 186  
Technologies      
Disclosure of detailed information about intangible assets [line items]      
Net book value 121 177 230
Technologies | Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 14 15  
Technologies | Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 107 162  
Currently marketed products      
Disclosure of detailed information about intangible assets [line items]      
Net book value 25,513 27,106 30,767
Currently marketed products | Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 24,487 25,938  
Currently marketed products | Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 1,026 1,168  
Other intangible assets      
Disclosure of detailed information about intangible assets [line items]      
Net book value 1,589 1,400 $ 1,112
Other intangible assets | Operating segments [member] | Innovative Medicines      
Disclosure of detailed information about intangible assets [line items]      
Net book value 1,139 1,091  
Other intangible assets | Operating segments [member] | Sandoz      
Disclosure of detailed information about intangible assets [line items]      
Net book value 92 61  
Other intangible assets | Operating segments [member] | Corporate      
Disclosure of detailed information about intangible assets [line items]      
Net book value $ 358 $ 248