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STOCK-BASED COMPENSATION - Components of Stock Based Compensation (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation $ 7.5 $ 7.8
Tax benefits on stock-based compensation expense 3.9 3.1
To be settled with stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 4.6 5.2
Employee contributions for above stock plans 2.9 2.6
Total stock-based compensation 7.5 7.8
Tax benefits on stock-based compensation expense 1.1 1.2
To be settled with stock | Tax benefits on stock-based compensation payments    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Tax benefits on stock-based compensation expense 2.8 1.9
To be settled with stock | Stock-based retirement plans contributions    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense (0.3) 0.6
To be settled with stock | Deferred Stock Compensation Program    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.5 0.6
To be settled with stock | Stock-based retirement plans    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.2 0.2
To be settled with stock | Discount Stock Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.3 0.3
To be settled with stock | 2018 PSU - TSR based    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.9 0.7
To be settled with stock | 2018 PSU - EBIT CAGR based    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense (2.1) 1.6
To be settled with stock | 2017 and prior PSU awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.5
To be settled with stock | Restricted Stock Unit awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 4.7 0.5
To be settled with stock | Profitable Growth Incentive awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.0
To be settled with stock | Other, primarily non-employee directors restricted stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.4 0.2
To be settled in cash    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense (5.4) 3.3
To be settled in cash | Stock-based retirement plans contributions    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.1 0.1
To be settled in cash | Deferred Stock Compensation Program    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.0
To be settled in cash | Stock-based retirement plans    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.0
To be settled in cash | Discount Stock Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.0
To be settled in cash | 2018 PSU - TSR based    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense (2.8) 0.8
To be settled in cash | 2018 PSU - EBIT CAGR based    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense (2.8) 2.0
To be settled in cash | 2017 and prior PSU awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.1 0.4
To be settled in cash | Restricted Stock Unit awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.0
To be settled in cash | Profitable Growth Incentive awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense 0.0 0.0
To be settled in cash | Other, primarily non-employee directors restricted stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense $ 0.0 $ 0.0