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STOCK-BASED COMPENSATION PLANS (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Stock Option Activity
The following table summarizes the Company’s stock option activity and related information for the 2011 Plan, the 2000 Plan and Directors Plan for the years ended December 31: 
OptionsWeighted
Average
Exercise
Price		Weighted Average
Remaining
Contractual Life		Aggregate
Intrinsic value
(in millions)
Outstanding at December 31, 20161,098,823  $35.39  4.3$52.3  
Granted65,522  86.91   —  
Exercised(166,838) 21.37   (10.0) 
Canceled(13,995) 76.89   (0.1) 
Outstanding at December 31, 2017983,512  $32.52  4.0$40.1  
Granted82,580  77.54   —  
Exercised(582,303) 28.29   (24.4) 
Canceled(17,112) 69.76   —  
Outstanding at December 31, 2018466,677  $61.04  5.7$4.3  
Granted134,450  70.44   1.0  
Exercised(4,868) 22.45   (0.3) 
Canceled(8,235) 73.00   —  
Outstanding at December 31, 2019588,024  $63.36  5.7$8.5  
Exercisable at December 31, 2019383,150  $55.25  4.7$8.6  
Stock Options Outstanding
Options outstanding at December 31, 2019 were as follows: 
Number of
Options		Weighted
Average
Exercise
Price of
Options		Weighted
Average
Remaining
Contractual		Number of
Options
Currently		Weighted Average
Exercise Price of
Options Currently
Range of exercise pricesOutstandingOutstandingLifeExercisableExercisable
Under $35.0067,026  $28.41  1.167,026  $28.41  
35.00 - 50.00107,033  41.36  2.6107,033  41.36  
50.00 - 65.0064,167  61.33  6.148,373  61.33  
65.00 - 80.00227,639  71.20  8.177,731  59.39  
Over 80.00122,159  88.27  6.582,987  87.45  
 588,024  $63.36   383,150  $55.25  
Schedule of Share-Based Fair Value of Each Option Grant Weighted-Average Assumptions The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions: 
For the year ended
December 31,
 201920182017
Dividend yield0.66 %0.31 %0.23 %
Risk-free interest rate2.6 %2.8 %2.2 %
Stock price volatility25.8 %23.9 %23.4 %
Expected life (years)5.05.05.0
Weighted average fair value of options granted during the year$19.54  $20.59  $20.69  
Restricted Stock Activity and Incentive Stock Awards Activity
The following table summarizes the restricted stock activity and related information for the 2011 Plan, the 2000 Plan, and Directors Plan, and incentive stock units activity and related information for the 2011 Plan and the 2000 Plan with related information for the years ended December 31:
Restricted
Stock
and Units		Incentive
Stock
Awards		Weighted
Average Grant
Date Fair
Value
Outstanding at December 31, 2016396,295  424,750  $72.18  
Granted153,516  157,025  86.66  
Vested(137,088) (153,271) 70.34  
Adjustment for incentive stock awards expected to vest—  (87,592) 73.69  
Canceled(13,723) (13,579) 76.61  
Outstanding at December 31, 2017399,000  327,333  $78.76  
Granted224,060  175,100  73.76  
Vested(148,644) (93,312) 81.55  
Adjustment for incentive stock awards expected to vest—  32,996  74.62  
Canceled(29,327) (26,875) 78.60  
Outstanding at December 31, 2018445,089  415,242  $75.51  
Granted608,813  259,950  70.61  
Vested(235,406) (119,835) 71.65  
Adjustment for incentive stock awards expected to vest—  80,403  78.04  
Canceled(27,465) (63,758) 74.04  
Outstanding at December 31, 2019791,031  572,002  $73.64