v3.26.1
Intangible assets other than goodwill (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of detailed information about intangible assets [line items]            
Impairment of intangibles       $ 543    
Reversal of deferred tax liabilities       115    
Deferred tax liabilities $ 841     841   $ 941
Intangible asset, recoverable amount $ 9     $ 9    
Discount rate used for fair value assessment 8.25%     8.25%    
Surgical            
Disclosure of detailed information about intangible assets [line items]            
Impairment of intangibles $ 505          
Vision Care            
Disclosure of detailed information about intangible assets [line items]            
Impairment of intangibles   $ 38 $ 43   $ 43