Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events- Additional Information (Detail) - $ / shares	1 Months Ended	12 Months Ended
	Aug. 31, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Common Class A [Member]
Subsequent Event [Line Items]
Cash dividends declared per share of common stock		$ 0.20	$ 0.20	$ 0.20
Common Class B [Member]
Subsequent Event [Line Items]
Cash dividends declared per share of common stock		$ 0.20	$ 0.20	$ 0.20
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividends per common share, date of dividend payable	Oct. 16, 2019
Cash dividends per common share, date of record for dividend	Sep. 11, 2019
Subsequent Event [Member] \| Common Class A [Member]
Subsequent Event [Line Items]
Cash dividends declared per share of common stock	$ 0.10
Subsequent Event [Member] \| Common Class B [Member]
Subsequent Event [Line Items]
Cash dividends declared per share of common stock	$ 0.10