SHAREHOLDERS' EQUITY - Additional Information (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017	Jan. 31, 2016	Sep. 30, 2015	Apr. 30, 2015	Apr. 30, 2007	May 31, 2005	Aug. 31, 2003	May 31, 2000
Authorized Shares and Designation of Preferred Class:
Common stock authorized (in shares)	100,000,000
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Share Repurchase Program:
Authorized stock repurchase amount			$ 450,000,000	$ 400,000,000	$ 350,000,000	$ 300,000,000	$ 200,000,000	$ 100,000,000	$ 50,000,000
Repurchases of common stock to date (in shares)	19,900,000
Repurchases of common stock to date	$ 414,700,000
Remaining authorized repurchase amount	$ 35,300,000