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EMPLOYEE BENEFIT PLANS (Summary of Stock Options and Stock Appreciation Rights Outstanding and Exercisable) (Details)
shares in Thousands
 9 Months Ended
Sep. 30, 2017
$ / shares
shares
Cash Stock Appreciation Rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, number of shares (in shares) | shares 61
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 36.73
Equity instruments other than options outstanding, weighted- average remaining contractual term 6 years 2 months 12 days
Equity instruments other than options exercisable, number of shares (in shares) | shares 11
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 36.73
Stock options  
Stock-based compensation plans disclosures  
Stock options outstanding, number of shares (in shares) | shares 334
Stock options outstanding, weighted- average exercise price (in dollars per share) $ 81.69
Stock options outstanding, weighted- average remaining contractual term 3 years
Stock options exercisable, number of shares (in shares) | shares 334
Stock options exercisable, weighted- average exercise price (in dollars per share) $ 81.69
Stock appreciation rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, number of shares (in shares) | shares 1,814
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 44.78
Equity instruments other than options outstanding, weighted- average remaining contractual term 6 years
Equity instruments other than options exercisable, number of shares (in shares) | shares 537
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 59.74
$29.78 - $47.99 | Cash Stock Appreciation Rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, lower range (in dollars per share) 29.78
Equity instruments other than options outstanding, upper range (in dollars per share) $ 47.99
Equity instruments other than options outstanding, number of shares (in shares) | shares 61
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 36.73
Equity instruments other than options outstanding, weighted- average remaining contractual term 6 years 2 months 12 days
Equity instruments other than options exercisable, number of shares (in shares) | shares 11
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 36.73
$29.78 - $47.99 | Stock options  
Stock-based compensation plans disclosures  
Stock options outstanding, lower range (in dollars per share) 29.78
Stock options outstanding, upper range (in dollars per share) $ 47.99
Stock options outstanding, number of shares (in shares) | shares 79
Stock options outstanding, weighted- average exercise price (in dollars per share) $ 37.00
Stock options outstanding, weighted- average remaining contractual term 1 year 6 months
Stock options exercisable, number of shares (in shares) | shares 79
Stock options exercisable, weighted- average exercise price (in dollars per share) $ 37.00
$29.78 - $47.99 | Stock appreciation rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, lower range (in dollars per share) 29.78
Equity instruments other than options outstanding, upper range (in dollars per share) $ 47.99
Equity instruments other than options outstanding, number of shares (in shares) | shares 1,485
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 38.07
Equity instruments other than options outstanding, weighted- average remaining contractual term 6 years 2 months 12 days
Equity instruments other than options exercisable, number of shares (in shares) | shares 310
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 38.91
$13.65 - $29.49 | Stock options  
Stock-based compensation plans disclosures  
Stock options outstanding, lower range (in dollars per share) 13.65
Stock options outstanding, upper range (in dollars per share) $ 29.49
Stock options outstanding, number of shares (in shares) | shares 35
Stock options outstanding, weighted- average exercise price (in dollars per share) $ 14.12
Stock options outstanding, weighted- average remaining contractual term 1 year 4 months 24 days
Stock options exercisable, number of shares (in shares) | shares 35
Stock options exercisable, weighted- average exercise price (in dollars per share) $ 14.12
$13.65 - $29.49 | Stock appreciation rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, lower range (in dollars per share) 13.65
Equity instruments other than options outstanding, upper range (in dollars per share) $ 29.49
Equity instruments other than options outstanding, number of shares (in shares) | shares 101
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 29.49
Equity instruments other than options outstanding, weighted- average remaining contractual term 6 years 9 months 18 days
Equity instruments other than options exercisable, number of shares (in shares) | shares 34
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 29.49
$55.04 - $83.83 | Stock options  
Stock-based compensation plans disclosures  
Stock options outstanding, lower range (in dollars per share) 55.04
Stock options outstanding, upper range (in dollars per share) $ 83.83
Stock options outstanding, number of shares (in shares) | shares 91
Stock options outstanding, weighted- average exercise price (in dollars per share) $ 80.80
Stock options outstanding, weighted- average remaining contractual term 3 years 2 months 12 days
Stock options exercisable, number of shares (in shares) | shares 91
Stock options exercisable, weighted- average exercise price (in dollars per share) $ 80.80
$55.04 - $83.83 | Stock appreciation rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, lower range (in dollars per share) 55.04
Equity instruments other than options outstanding, upper range (in dollars per share) $ 83.83
Equity instruments other than options outstanding, number of shares (in shares) | shares 125
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 79.16
Equity instruments other than options outstanding, weighted- average remaining contractual term 4 years 9 months 18 days
Equity instruments other than options exercisable, number of shares (in shares) | shares 90
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 79.91
$95.91 - $131.46 | Stock options  
Stock-based compensation plans disclosures  
Stock options outstanding, lower range (in dollars per share) 95.91
Stock options outstanding, upper range (in dollars per share) $ 131.46
Stock options outstanding, number of shares (in shares) | shares 129
Stock options outstanding, weighted- average exercise price (in dollars per share) $ 127.97
Stock options outstanding, weighted- average remaining contractual term 4 years 1 month 6 days
Stock options exercisable, number of shares (in shares) | shares 129
Stock options exercisable, weighted- average exercise price (in dollars per share) $ 127.97
$95.91 - $131.46 | Stock appreciation rights  
Stock-based compensation plans disclosures  
Equity instruments other than options outstanding, lower range (in dollars per share) 95.91
Equity instruments other than options outstanding, upper range (in dollars per share) $ 131.46
Equity instruments other than options outstanding, number of shares (in shares) | shares 103
Equity instruments other than options outstanding, weighted- average exercise price (in dollars per share) $ 114.46
Equity instruments other than options outstanding, weighted- average remaining contractual term 3 years 8 months 12 days
Equity instruments other than options exercisable, number of shares (in shares) | shares 103
Equity instruments other than options exercisable, weighted- average exercise price (in dollars per share) $ 114.46