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Segment information - Net sales and other revenues by segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of operating segments [line items]      
Net sales $ 9,836 $ 9,370 $ 8,654
Total other revenues 75 85 63
Net sales and other revenues 9,911 9,455 8,717
Operating segments      
Disclosure of operating segments [line items]      
Net sales 9,836 9,370 8,654
Total other revenues   85 63
Surgical | Operating segments      
Disclosure of operating segments [line items]      
Net sales 5,522 5,314 5,045
Total other revenues 4 0 0
Surgical | Implantables | Operating segments      
Disclosure of operating segments [line items]      
Net sales 1,775 1,703 1,725
Surgical | Consumables | Operating segments      
Disclosure of operating segments [line items]      
Net sales 2,861 2,719 2,499
Surgical | Equipment/other | Operating segments      
Disclosure of operating segments [line items]      
Net sales 886 892 821
Vision Care | Operating segments      
Disclosure of operating segments [line items]      
Net sales 4,314 4,056 3,609
Total other revenues 71 85 63
Vision Care | Contact lenses | Operating segments      
Disclosure of operating segments [line items]      
Net sales 2,609 2,400 2,192
Vision Care | Ocular health | Operating segments      
Disclosure of operating segments [line items]      
Net sales $ 1,705 $ 1,656 $ 1,417