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STOCK COMPENSATION (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
Apr. 18, 2013
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate 1.40%    
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate     85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 26.10%    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Additional Disclosures Abstract      
Number of shares granted 221,050    
Number of shares forfeited (8,052)    
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Term 2 years 11 months    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted average fair value of grants | $ / shares $ 59.71    
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward      
Share-based compensation number of options beginning balance 975,400    
Exercises in period number of options (71,700)    
Forfeitures in period number of options (2,000)    
Share-based compensation number of options ending balance 901,700    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]      
Beginning Balance | $ / shares $ 35.14    
Exercises in period weighted average exercise price | $ / shares 37.13    
Forfeitures n period weighted average exercise price | $ / shares 37.65    
Ending Balance | $ / shares $ 34.97    
Exercise Price Range One      
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]      
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options 901,700    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term 4 years 11 months 17 days    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance | $ / shares $ 34.97    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options 832,750    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term 4 years 9 months 20 days    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ / shares $ 34.75    
EmployeeStock      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares available for grant     2,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Terms of Award, Maximum (in years)   10 years  
Allocated Share Based Compensation Expense | $ $ 1.0 $ 1.0  
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized | $ $ 1.0    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition 11 months    
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value | $ $ 23.8    
Employee emergence equity program expense | $ $ 1.0    
Restricted Stock      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Term 3 years 13 days    
Allocated Share Based Compensation Expense | $ $ 5.0 4.0  
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized | $ 45.0    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value | $ $ 16.0 14.0  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Additional Disclosures Abstract      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance 1,800,557    
Number of shares granted 428,348    
Number of shares vested (399,310)    
Number of shares forfeited (19,238)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance 1,810,357    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Beginning Balance | $ / shares $ 37.78    
Weighted average fair value of grants | $ / shares 55.25    
Weighted average fair value of vested | $ / shares 40.88    
Weighted average fair value of forfeited | $ / shares 41.00    
Ending Balance | $ / shares $ 41.16    
Performance Stock Units (PSUs)      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Allocated Share Based Compensation Expense | $ $ 3.0 $ 2.0  
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized | $ $ 26.0    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition 2 years 22 days    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Additional Disclosures Abstract      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance 472,300    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance 685,298    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Beginning Balance | $ / shares $ 47.19    
Weighted average fair value of forfeited | $ / shares 45.93    
Ending Balance | $ / shares 51.24    
Minimum [Member]      
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ / shares 13.89    
Maximum [Member]      
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price | $ / shares $ 42.16    
Stock Plan Member, 2016 [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares available for grant 3,300,000    
Internal Based Performance Metric [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Performance Stock Payout Minimum 0    
Performance Stock Payout Range Maximum 3.00    
External Based Performance Metric [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Performance Stock Payout Minimum 0    
Performance Stock Payout Range Maximum 2.00    
Employee Stock Purchase Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares available for grant 1,200,000    
Allocated Share Based Compensation Expense | $ $ 1.0