Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Total Stock-Based Compensation Expense) (Details)

v3.6.0.2
STOCK-BASED COMPENSATION (Total Stock-Based Compensation Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense, before income taxes $ 37.1 $ 38.4 $ 38.1
Cost of services      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense, before income taxes 4.5 5.0 4.6
Selling, general and administrative expenses      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock-based compensation expense, before income taxes $ 32.6 $ 33.4 $ 33.5