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THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES - Employee benefit Plan (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net periodic benefit cost      
Net periodic benefit cost $ (0.9) $ 1.8 $ 1.7
U.S. Pension Benefits      
Pension plans with accumulated benefit obligations and projected benefit obligations in excess of plan assets      
Aggregated projected benefit obligation at end of period (111.5) (123.9)  
Aggregated fair value of plan assets at end of period 84.3 84.2  
Net liability for benefit cost - funded status (27.2) (39.7)  
Aggregated accumulated benefit obligation $ 111.5 $ 123.9  
Weighted-average assumptions used to determine net periodic benefit cost      
Discount rate (as a percent) 2.26% 3.07% 4.12%
Weighted average expected long-term return on plan assets (as a percent) 6.57% 6.70% 6.70%
Benefits expected to be paid      
2022 $ 5.5    
2023 4.6    
2024 5.0    
2025 5.2    
2026 5.3    
Years 2027 - 2031 28.5    
Net periodic benefit cost      
Net periodic benefit cost (0.9) $ 1.8 $ 1.7
International Pension Benefits      
Pension plans with accumulated benefit obligations and projected benefit obligations in excess of plan assets      
Aggregated projected benefit obligation at end of period (125.0) (133.1)  
Aggregated fair value of plan assets at end of period 126.0 128.7  
Net liability for benefit cost - funded status 1.0 (4.4)  
Aggregated accumulated benefit obligation $ 125.0 $ 129.5  
Weighted-average assumptions used to determine benefit obligations      
Rate of compensation increase (as a percent) 2.29% 2.27% 2.19%
Weighted-average assumptions used to determine net periodic benefit cost      
Discount rate (as a percent) 1.78% 1.97% 2.86%
Weighted average expected long-term return on plan assets (as a percent) 1.28% 2.15% 2.99%
Rate of compensation increase (as a percent) 2.29% 2.27% 2.19%
Benefits expected to be paid      
2022 $ 3.7    
2023 3.7    
2024 3.9    
2025 4.0    
2026 4.1    
Years 2027 - 2031 $ 22.1    
Pension Benefits | U.S. Pension Benefits      
Weighted-average assumptions used to determine benefit obligations      
Discount rate (as a percent) 2.66% 2.26%  
Pension Benefits | International Pension Benefits      
Weighted-average assumptions used to determine benefit obligations      
Discount rate (as a percent) 1.79% 1.78%  
Rate of compensation increase (as a percent) 2.28% 2.29%  
Weighted-average assumptions used to determine net periodic benefit cost      
Rate of compensation increase (as a percent) 2.28% 2.29%