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Segment information - Net sales and other revenues by segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of operating segments [line items]      
Net sales to third parties $ 9,370 $ 8,654 $ 8,222
Other revenues 85 63 69
Net sales and other revenues 9,455 8,717 8,291
Surgical      
Disclosure of operating segments [line items]      
Net sales to third parties 5,314 5,045 4,703
Surgical | Implantables      
Disclosure of operating segments [line items]      
Net sales to third parties 1,703 1,725 1,522
Surgical | Consumables      
Disclosure of operating segments [line items]      
Net sales to third parties 2,719 2,499 2,388
Surgical | Equipment/other      
Disclosure of operating segments [line items]      
Net sales to third parties 892 821 793
Vision Care      
Disclosure of operating segments [line items]      
Net sales to third parties 4,056 3,609 3,519
Vision Care | Contact lenses      
Disclosure of operating segments [line items]      
Net sales to third parties 2,400 2,192 2,139
Vision Care | Ocular health      
Disclosure of operating segments [line items]      
Net sales to third parties $ 1,656 $ 1,417 $ 1,380