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Segment Information - Net sales by business franchise (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of products and services [line items]      
Net sales $ 6,763 $ 7,362 $ 7,149
Surgical [member]      
Disclosure of products and services [line items]      
Net sales 3,710 4,174 3,999
Surgical [member] | Implantables [Member]      
Disclosure of products and services [line items]      
Net sales 1,126 1,210 1,136
Surgical [member] | Consumables [Member]      
Disclosure of products and services [line items]      
Net sales 1,952 2,304 2,227
Surgical [member] | Equipment & other [Member]      
Disclosure of products and services [line items]      
Net sales 632 660 636
Vision Care [member]      
Disclosure of products and services [line items]      
Net sales 3,053 3,188 3,150
Vision Care [member] | Contact lenses [Member]      
Disclosure of products and services [line items]      
Net sales 1,838 1,969 1,928
Vision Care [member] | Ocular health [Member]      
Disclosure of products and services [line items]      
Net sales $ 1,215 $ 1,219 $ 1,222