Date the repurchase agreement was made.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Footnote 2

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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Date the declared dividend will be paid, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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- Definition

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

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Amount awarded from other party in judgment or settlement of litigation.

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- Definition

Amount of stock repurchase plan authorized.

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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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Investment Repurchase Agreement, Repurchase Period

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Subsequent Events (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Jun. 19, 2018	Jun. 11, 2018	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Subsequent Events [Line Items]
Cash dividend declared			$ 0.54	$ 0.49	$ 1.57	$ 1.40
Dividend payable, declared date					Jun. 19, 2018
Dividends payable, date to be paid					Jul. 31, 2018
Dividend payable, record date					Jul. 20, 2018
Share-buy back plan, Date of agreement					Jun. 19, 2018
Repurchase period					September 1, 2018 through August 31, 2020
Subsequent Events [Member]
Subsequent Events [Line Items]
Cash dividend declared	$ 0.54
Subsequent Events [Member] \| IQ Products Company Litigation Matter [Member]
Subsequent Events [Line Items]
Litigation settlement		$ 1.5
Chief Executive Officer And Chief Financial Officer [Member] \| Subsequent Events [Member]
Subsequent Events [Line Items]
Share buy-back plan, amount authorized	$ 75.0