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GEOGRAPHIC INFORMATION AND SELECTED STATEMENTS OF INCOME DATA - Schedule of revenues by product lines (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenue from External Customer [Line Items]      
Total revenues $ 2,414.7 $ 2,329.9 $ 2,166.8
Network Security Gateways      
Revenue from External Customer [Line Items]      
Total revenues 452.0 507.8 480.5
Other      
Revenue from External Customer [Line Items]      
Total revenues [1] 45.4 47.1 33.4
Products and licenses      
Revenue from External Customer [Line Items]      
Total revenues 497.4 554.9 513.9
Security subscriptions      
Revenue from External Customer [Line Items]      
Total revenues 981.2 858.0 755.2
Software updates and maintenance      
Revenue from External Customer [Line Items]      
Total revenues $ 936.1 $ 917.0 $ 897.7
[1] Comprised of Endpoint security, Mobile security and Security management products, each comprising of less than 10% of products and licenses revenues