COMMON STOCK REPURCHASE PROGRAM (Details) - $ / shares	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Feb. 12, 2020
COMMON STOCK REPURCHASE PROGRAM
Shares authorized for repurchase under share repurchase program (in shares)	55,000,000	55,000,000	10,000,000
Shares purchased in the open market under share repurchase program (in shares)	200,000	400,000
Average cost per share of shares purchased in the open market under share repurchase program (in dollars per share)	$ 127.73	$ 124.04
Remaining shares available for repurchase under the stock repurchase program (in shares)	11,000,000.0	11,000,000.0