SHARE-BASED COMPENSATION PLANS - Significant Assumptions Used in Binomial Lattice Model (Details) (Details)	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life, in years	7 years 6 months		7 years 6 months
Expected volatility	36.74%		31.73%
Risk-free rate of return	1.60%		1.79%
Dividend yield on Class A Common Stock	1.62%		0.80%
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life, in years	5 years 10 months 10 days	4 years 9 months 15 days	5 years 9 months 15 days
Expected volatility	30.00%	36.74%	26.14%
Risk-free rate of return	1.99%	1.01%	1.96%
Dividend yield on Class A Common Stock	2.67%	0.96%	0.63%
Yield on cash	4.70%

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Yield on Cash

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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