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Associated companies (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of associates [line items]      
Net income statement effect $ (9) $ 15,339 $ 673
Cumulative currency translation effects      
Disclosure of associates [line items]      
Cumulative currency translation gains/losses recycled through income statement $ 13 3,200 0
Roche Holding AG, Switzerland      
Disclosure of associates [line items]      
Novartis share of current year consolidated net income   815 913
Prior year adjustment   40 (64)
Amortization of fair value adjustments relating to intangible assets   (70) (172)
Gain on divestment   14,556  
Net income statement effect   15,341 677
Amortization of fair value adjustments relating to intangible assets tax   $ 10 $ 26