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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allocation of stock-based compensation expense      
Total stock-based compensation expense $ 109.3 $ 92.6 $ 81.3
Income tax benefit (18.9) (15.4) (14.8)
Total stock-based compensation expense, net of tax 90.4 77.2 66.5
Cost of sales      
Allocation of stock-based compensation expense      
Total stock-based compensation expense 20.4 17.2 14.7
Selling, general, and administrative expenses      
Allocation of stock-based compensation expense      
Total stock-based compensation expense 65.6 56.6 51.2
Research and development expenses      
Allocation of stock-based compensation expense      
Total stock-based compensation expense $ 23.3 $ 18.8 $ 15.4