Stockholders' Equity (Estimated Grant Date Fair Value of Stock Options) (Details)	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Average volatility (as a percentage)	35.80%	36.00%
Risk-free interest rate (as a percentage)	2.80%	1.80%
Weighted-average expected life in years	6 years 18 days	5 years 8 months 27 days
Estimated dividend annual yield rate (as a percentage)	0.00%	2.50%

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

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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