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EARNINGS PER COMMON SHARE - ADDITIONAL INFORMATION (Details) - USD ($)			2 Months Ended	12 Months Ended
	May 12, 2020	Mar. 09, 2020	May 12, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Potentially dilutive securities excluded from computation of earnings, amount (in shares)				900,000		1,600,000
Antidilutive common stock options not included in the computation of diluted earnings per common share (in dollars per share)				3,100,000	3,100,000	3,500,000
Accelerated share repurchases, authorized amount		$ 140,000,000
Accelerated share repurchases, settlement (payment) or receipt		$ 140,000,000
Stock repurchased during period, shares (in shares)	1,000,000.0	2,700,000
Accelerated share repurchases, final price paid per share (usd per share)		$ 42.12
Arithmetic Average
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Accelerated share repurchases, final price paid per share (usd per share)			$ 38.88