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Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Dividends) (Details) - $ / shares | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Accounting Policies [Abstract] |  |  |
Cash dividends per common share (in usd per share) | $ 1.80 | $ 1.55 | $ 1.37

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References 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 + Details
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