v3.24.1.1.u2
STOCK COMPENSATION PLANS - Share-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock compensation expense $ 13.5 $ 6.3
Income tax benefits 2.0 1.1
Direct costs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock compensation expense 9.0 3.6
Selling, general and administrative expenses    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock compensation expense $ 4.5 $ 2.7