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Cover
6 Months Ended
Jun. 30, 2024
Cover [Abstract]  
Document Type 6-K
Entity File Number 001-31269
Entity Registrant Name ALCON INC.
Entity Address, Address Line One Rue Louis-d'Affry 6
Entity Address, Address Line Two 1701
Entity Address, City or Town Fribourg
Entity Address, Country CH
Document Period End Date Jun. 30, 2024
Entity Central Index Key 0001167379
Current Fiscal Year End Date --12-31
Amendment Flag false
Document Fiscal Year Focus 2024
Document Fiscal Period Focus Q2