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SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Unit_Segment
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Significant Accounting Policies [Line Items]      
Number of operating segments | Unit_Segment 1    
Goodwill impairment losses $ 0.0 $ 0.0  
Deferred revenue 1,907.7 1,877.8  
Revenue expected to be recognized from remaining performance obligations 2,249.0 2,146.1  
Revenue expected to be recognized from remaining performance obligations, 2019 1,502.7    
Provision for estimated sales returns, rebates, stock rotations, and other customer rights $ 10.2 9.5  
Percentage of employee contributions contributed by employer towards employee benefit plan 50.00%    
Maximum percentage of employee's eligible compensation 6.00%    
Minimum percentage of tax benefit realized upon settlement 50.00%    
Advertising expenses $ 7.6 4.6 $ 4.1
Derivative, net gain (loss) $ 18.6 $ 24.4 $ (1.1)
Anti-dilutive shares excluded from computation of earnings per share amount | shares 1,309,068 1,730,104 4,891,452
Right of use assets $ 21.5    
Lease liabilities 26.1    
Rent expenses $ 7.7 $ 6.3 $ 8.1
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] us-gaap:PrepaidExpenseAndOtherAssets    
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilities    
Manufacturing partner and supplier liabilities      
Significant Accounting Policies [Line Items]      
Significant costs associated with exposure $ 0.0    
Other Long Term Assets      
Significant Accounting Policies [Line Items]      
Deferred commission 37.3 15.3  
Amortisation of contracted capitalised costs 10.6 10.4 11.6
Security Subscriptions and Software Updates and Maintenance      
Significant Accounting Policies [Line Items]      
Deferred revenue 1,363.4 1,257.4  
Foreign Exchange Forward Contracts | Not Designated as Hedging Instrument      
Significant Accounting Policies [Line Items]      
Derivative, notional amount 241.7 207.9  
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Cash Flow Hedging      
Significant Accounting Policies [Line Items]      
Derivative, notional amount 207.5 266.2  
Foreign Exchange Forward Contracts | Financial Income | Not Designated as Hedging Instrument      
Significant Accounting Policies [Line Items]      
Derivative, net gain (loss) $ (6.2) $ (19.5) $ 0.6
Minimum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets 4 years    
Maximum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets 20 years