INCENTIVE PLANS - Performance Share Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted- average grant date fair value per share (in dollars per share):
Weighted-average market value (in dollars per share)	$ 63.38	$ 73.87	$ 59.12
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period used for calculation of performance goals	3 years
Vesting period	3 years
Percentage of target shares earned	100.00%
Number of shares of common stock equivalent to each target share		1
Valuation Assumptions
Expected volatility	25.33%	24.93%	25.79%
Expected dividend yield	2.67%	1.75%	1.30%
Unvested stock awards (in shares):
Beginning of period (in shares)	1,768,362
Granted (in shares)	560,031
Canceled (in shares)	(194,782)
Payments (in shares)	(641,611)
End of period (in shares)	1,492,000	1,768,362
Weighted- average grant date fair value per share (in dollars per share):
Beginning of period (in dollars per share)	$ 51.88
Granted (in dollars per share)	72.83
Canceled (in dollars per share)	42.24
Payments (in dollars per share)	27.03
End of period (in dollars per share)	$ 71.69	$ 51.88
Weighted-average market value (in dollars per share)		$ 83.24	$ 59.22
Minimum | Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target shares earned	0.00%
Maximum | Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target shares earned	150.00%