STOCKHOLDERS' EQUITY (Common Stock Dividends) (Details) - $ / shares	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Stockholders' Equity Note [Abstract]
Dividends per share declared (in dollars per share)	$ 0.96	$ 0.96	$ 0.84	$ 0.84	$ 0.84	$ 0.8	$ 0.8	$ 0.8	$ 3.6	$ 3.24	$ 3.11	$ 2.99	$ 2.87
Dividends per share paid (in dollars per share)									$ 3.48	$ 3.20	$ 3.08