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Goodwill and other intangible assets - Additional information (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of detailed information about intangible assets [line items]              
Impairment charges $ 61       $ 0 $ 62 $ 225
Cash flow projection forecast duration (in years)         5 years    
Discount rate, measurement input              
Disclosure of detailed information about intangible assets [line items]              
Significant unobservable input, assets (as a percent) 0.078            
Research and development              
Disclosure of detailed information about intangible assets [line items]              
Impairment charges             180
Surgical              
Disclosure of detailed information about intangible assets [line items]              
Terminal growth rate (as a percent)         3.00% 3.00%  
Impairment charges     $ 178   $ 0 $ 60  
Recoverable amount $ 15            
Surgical | Cost of net sales              
Disclosure of detailed information about intangible assets [line items]              
Impairment charges 59            
Vision Care              
Disclosure of detailed information about intangible assets [line items]              
Terminal growth rate (as a percent)         3.00% 3.00%  
Impairment charges         $ 0 $ 2 $ 47
Recoverable amount       $ 48      
Vision Care | Cost of net sales              
Disclosure of detailed information about intangible assets [line items]              
Impairment charges       $ 45      
Vision Care | Research and development              
Disclosure of detailed information about intangible assets [line items]              
Impairment charges $ 2 $ 2