EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		111 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Oct. 31, 2019	Aug. 31, 2018	Feb. 28, 2018	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common Stock
Common stock, shares authorized (in shares)	325,000,000		325,000,000	325,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01	$ 0.01
Common stock, shares issued (in shares)	125,944,478		125,944,478	125,701,889
Common stock, shares outstanding (in shares)	109,719,823		109,719,823	110,656,892
Common Stock in Treasury, at Cost
Common stock held in Treasury (in shares)	16,224,655		16,224,655	15,044,997
Share Repurchase Program
Authorized amount	$ 1,100.0		$ 1,100.0		$ 250.0	$ 100.0	$ 150.0	$ 100.0	$ 100.0	$ 100.0	$ 100.0	$ 100.0	$ 100.0
Treasury Stock, Shares, Acquired	1,062,881	366,793	14,778,890
Treasury Stock Acquired, Average Cost Per Share	$ 112.46	$ 95.36	$ 62.27
Treasury Stock, Value, Acquired, Cost Method	$ 119.5	$ 35.0	$ 920.3
Availability remaining under existing share repurchase authorizations	$ 179.7	$ 171.1	$ 179.7
Purchase of Common Stock from Employees
Stock repurchased from employee stock plans (in shares)	116,777	118,563
Average price paid per share (in dollars per share)	$ 119.53	$ 94.59
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock, shares authorized (in shares)	20,000,000		20,000,000	20,000,000
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	0		0	0
Preferred stock, shares outstanding (in shares)	0		0	0
Dividends
Cash dividends per share, declared (in dollars per share)	$ 0.36	0.31
Cash dividends per share, paid (in dollars per share)	$ 0.36	$ 0.31
Aggregate payout	$ 40.0	$ 34.8